Hiking Decision Guide

Is Today a Good Day to Hike?

Not just the weather — the decision. Live Hiking Score, trail-weather matrix and 8 live trailheads worldwide. Built for hikers planning today's walk or next summer's multi-day trek.

Hiking Decision Card

Set the forecast for your trail day — the score recalculates instantly.

17°C
14km/h
20%
15%
6
22km

Hiking Score

92/100
Perfect

Rain probability is the limiting factor: pop-up showers possible — pack a shell.

How this score was calculated

Starting score
100
Air temperature (17°C)
±0
Wind (14 km/h)
±0
Rain probability (20%)
-4
Storm risk (15%)
±0
UV index (6.0)
-4
Visibility (22 km)
±0
Final Hiking Score
92

Signature feature

The Trail Weather Matrix

Altitude × weather scenario, scored at a glance. A 'stable high' valley day scores 100, the same day on a 3,500 m summit drops sharply — see it cell-by-cell.

Weather ↓   Altitude →Valley · 300 mForest · 800 mTreeline · 1800 mAlpine · 2500 mSummit · 3500 m
Stable high pressure
9222°C
9619°C
9012°C
808°C
681°C
Warm summer day
6228°C
7225°C
7018°C
6714°C
577°C
Unsettled mixed
6318°C
6315°C
438°C
264°C
14-3°C
Storm risk afternoon
4121°C
4518°C
1811°C
17°C
00°C
Cold front passage
5610°C
467°C
220°C
10-4°C
0-11°C
Heatwave
3735°C
3732°C
3125°C
4121°C
4514°C

Each cell is the Hiking Score after applying a −6.5°C / 1000 m lapse rate plus extra wind and storm risk above 1000 m. A "stable high" valley day scores 100 — the same day on a 3,500 m summit drops sharply because of cold, wind and reduced visibility.

Rankings

The Best Hiking Trails, Ranked

Composite ranking across baseline weather, scenery, remoteness and crowd density — 14 iconic trails worldwide. Toggle 'optimise for' to see how the order changes.

Optimise for:
Rank
1

Camino Francés (final 100 km)

Galicia, Spain · Thru-hike · Easy · 115 km

Sarria → Santiago de Compostela — best May–Jun, Sep–Oct

Weather 92Scenery 82Remote 20Crowds 95
81
Overall
Rank
2

Preikestolen (Pulpit Rock)

Lysefjord, Norway · Day hike · Moderate · 8 km

604 m vertical cliff over Lysefjord — best May–Sep

Weather 76Scenery 97Remote 25Crowds 94
79
Overall
Rank
3

Half Dome Cables

Yosemite NP, USA · Summit · Expert · 25.7 km

Granite cables to the summit — best Jun–Sep

Weather 72Scenery 98Remote 55Crowds 92
77
Overall
Rank
4

Cinque Terre Blue Trail

Liguria, Italy · Day hike · Easy · 11 km

Five clifftop villages above the Med — best Apr–Oct

Weather 72Scenery 95Remote 15Crowds 96
77
Overall
Rank
5

Trolltunga

Hardangerfjord, Norway · Day hike · Hard · 28 km

The Troll's Tongue cliff over Ringedalsvatnet — best Jun–Sep

Weather 66Scenery 99Remote 55Crowds 78
74
Overall
Rank
6

Classic Inca Trail

Andes, Peru · Multi-day trek · Hard · 43 km

Sun Gate arrival at Machu Picchu — best May–Sep

Weather 64Scenery 99Remote 60Crowds 80
73
Overall

Weather + scenery + crowd density, evenly weighted. Weather sub-score uses each trail's best-month climatological baseline through the Hiking Score engine.

Trip planner

Plan My Hike

Pick your fitness, trip length and constraints — we'll shortlist matching trails from the 14-trail database.

Pick
1

Trolltunga

Hardangerfjord, Norway · Day hike · Hard · 28 km · best Jun–Sep

70
Match
Pick
2

Preikestolen (Pulpit Rock)

Lysefjord, Norway · Day hike · Moderate · 8 km · best May–Sep

68
Match
Pick
3

Cinque Terre Blue Trail

Liguria, Italy · Day hike · Easy · 11 km · best Apr–Oct

✓ Permit required — plan ahead
64
Match
Pick
4

Mount Snowdon (Llanberis Path)

Eryri, Wales · Summit · Moderate · 14.5 km · best May–Sep

61
Match

Match score = climatological weather (Hiking Score) + scenery + remoteness, adjusted for your fitness, style, kids, dog, heat tolerance and permit willingness. A shortlist, not a booking system.

Risk map

The Most Dangerous Weather Hazards

Five categories of weather risk on iconic trails — the trail that owns each one, why, and what to do about it.

Lightning / thunderstorm exposure

Mount Fuji (Yoshida Trail)

Honshu, Japan

50% afternoon convective storm probability in best season — exposed alpine terrain.

Mitigation: Pre-dawn alpine start, off the summit by 13:00, exit plan to treeline before cells build.

Heat & dehydration

Bright Angel Trail

Grand Canyon, USA

Baseline 30°C with 9 h of sun-exposed walking — heat stroke is the #1 medical call.

Mitigation: Dawn start, 4+ L water per person, electrolytes, descend before the afternoon high.

Sustained wind on exposed ridges

W Trek

Patagonia, Chile

38 km/h average wind — the most exposed trail in this set.

Mitigation: Check synoptic forecast 48 h ahead; turn back if sustained wind exceeds 50 km/h on the ridge.

High-altitude sickness

Kilimanjaro (Machame Route)

East Africa, Tanzania

Summit at 5895 m — above the 2,500 m AMS threshold. Roughly 1 in 4 hikers gets symptoms.

Mitigation: Acclimatise 2+ nights at altitude, ascend gradually, carry Diamox if prescribed, descend at first symptoms.

Persistent rain & poor visibility

Mount Snowdon (Llanberis Path)

Eryri, Wales

50% baseline rain probability — wet roots, low cloud, hypothermia risk if you stop.

Mitigation: Hardshell jacket, dry bags, fleece base layer, GPS track downloaded for navigation in fog.

Every trail on this list has killed experienced hikers. Read the weather honestly. Turning around at the right time is the most important skill in the mountains — the summit will be there next year.

Head to head

Compare Two Trails

Side-by-side weather and trail comparison — Half Dome vs the Tour du Mont Blanc by default, swap in any pair.

Half Dome CablesTour du Mont Blanc
TypeSummitMulti-day trek
DifficultyExpertHard
Distance25.7 km170 km
Elevation gain1,460 m10,000 m
Max altitude2,693 m2,665 m
Best monthsJun–SepJul–Sep
Air temp (base)24°C18°C
Wind (base)12 km/h18 km/h
Rain prob.15%35%
Storm risk35%45%
UV10.08.0
Scenery98/10099/100
Crowds92/10088/100
Remoteness55/10050/100
Permit?YesNo
Dog-friendlyNoNo
Family-friendlyNoNo
Hiking Score72 (Great)46 (Tough)

Hiking Score uses each trail's best-month climatological baseline through the same engine as the Decision Card above.

Quick verdicts

Should I actually do this today?

Eight common hiking questions, answered live against the conditions you set in the Decision Card above.

Trail day in general?

Go

Solid trail conditions overall — get out there.

Summit / exposed ridge?

Go

Stable atmosphere and good visibility — classic summit weather.

Take the kids?

Go

Comfortable conditions — pack snacks and enjoy a relaxed pace.

Bring the dog?

Go

Cool, dry, low-UV — perfect for an active dog.

Go solo?

Go

Stable, visible, mild — fine for a solo trail day.

Overnight / backpack?

Go

Mild night ahead — 3-season gear and a tarp are enough.

Chase the sunrise?

Go

Crystal-clear morning — set the alarm, the alpenglow will be spectacular.

Carry a waterproof shell?

Don't

Dry day expected — save the pack weight.

Interactive

Today's Trail Packing List

A trail packing list that updates with the Decision Card — Ten Essentials baseline plus weather-conditional items flagged.

Live packing list — updates with the Decision Card above.

5 essentials

  • Navigation: map + compass or GPS

    Trails braid, signs go missing — never rely on phone signal alone.

  • Headlamp with spare batteries

    Even a "short" hike can run long — sunset comes fast in forest.

  • Whistle + small first-aid kit

    Blisters, sprains and a way to be heard if you fall off-trail.

  • 2 L water + filter or tablets

    Dehydration is the #1 cause of trail rescue — refill when you can.

  • High-energy snacks

    Bonking on the descent is how injuries happen.

  • Sun cap & SPF 30

    UV breaks through cloud — pack just in case.

  • Trekking poles

    Save knees on the descent — especially on steep alpine routes.

  • Camera or zoom lens

    Summit panoramas reward a real lens.

Live now

Live Hiking Score: 8 Iconic Trailheads

Today's live air temperature, wind, rain probability and UV from Open-Meteo for eight legendary trailheads — Half Dome to Patagonia — scored through the same engine as the Decision Card.

Half Dome Cables

Yosemite NP, USA

Tour du Mont Blanc

Alps, France/Italy/Switzerland

Classic Inca Trail

Andes, Peru

Mount Fuji (Yoshida Trail)

Honshu, Japan

Trolltunga

Hardangerfjord, Norway

Bright Angel Trail

Grand Canyon, USA

W Trek

Patagonia, Chile

Preikestolen (Pulpit Rock)

Lysefjord, Norway

Storm risk is estimated from rain probability and amplified for alpine trails (above 2,000 m). Visibility is estimated from rain probability. Live air, wind, rain and UV from Open-Meteo.

Visual guide

Mountain Lapse Rate & Hazard Triggers

Two infographics that turn altitude lapse rates and the hiking-hazard playbook into a glance.

Altitude vs Temperature on a Classic Summer Day

An illustration using the 6.5°C / 1,000 m standard-atmosphere average. Real days vary.

Trailhead · 300 m

22°C

Example valley start.

Forest · 1000 m

~17°C

Pleasant under canopy — light fleece on breaks.

Treeline · 1800 m

~12°C

Exposed alpine — windproof shell required.

Alpine · 2500 m

~7°C

Fleece + windshell + hat — felt temp drops with wind.

Summit · 3500 m

~0°C

Using the 6.5 °C/1,000 m average; real drops can be larger or smaller.

Five Trail Hazard Signals

Weather signals where the usual right call is to descend, shelter or stay lower.

Thunder heard

Seek shelter

If you can hear thunder you are likely within striking distance (NWS). There is no safe place outside.

Strong wind on ridges

Stay lower

Strong gusts affect balance on exposed terrain; choose a sheltered route.

Low cloud or fog

Navigate

Landmarks disappear — stick to marked routes and carry map, compass or GPS.

Hot, humid day

Start early

Heat illness risk rises with heat, humidity, sun and effort — start early, shorten the route.

Cool, wet and windy

Hypothermia

Hypothermia can happen well above freezing when you are wet and in wind.

Deep dive

The Perfect Hiking Temperature, Honestly

Why cool to mild days are often comfortable — and what changes in heat and cold.

Climbing produces far more body heat than resting, so many hikers are comfortable in cool to mild conditions (roughly 10–20°C) with a light layer. As it gets hotter and more humid, sweating increases and heat-illness risk rises, especially in full sun on long climbs. Where that becomes a problem depends on fitness, acclimatisation, shade and effort.

In cold weather the risk flips from heat to cold. If you stop moving — rest break, injury, navigation pause — you cool quickly, especially in wind and rain. Hypothermia does not need freezing temperatures: cool, wet and windy conditions with soaked clothing are enough.

Sunlit forest hiking trail

Shaded forest trails often feel noticeably cooler than exposed sections on the same day — a real factor for hot-weather routing.

Deep dive

Wind: The Underestimated Trail Factor

Wind makes it feel colder, affects balance on ridges and is often stronger on summits. How the Hiking Score treats it:

Under 15 km/h: Light breeze — no score penalty.

15–30 km/h: Fine in forest, blustery on exposed ridges. Secure hats and loose gear.

30–50 km/h: Strong enough to affect balance on exposed terrain. Avoid summit ridges. Felt temperature drops sharply — add a windshell.

50+ km/h: Walking on exposed terrain becomes hard and gusts can throw you off balance. Choose a sheltered, lower route.

Wind-swept mountain summit

Summit wind is often much stronger than the valley forecast — check a mountain-specific forecast where available.

Planning horizons

How to Use Forecasts for Hiking Trip Planning

Different decisions need different forecast types. Match the forecast horizon to the decision you're making.

  1. 6+ months ahead: Climatological averages (this guide). Pick a trail's best month — the Best Hiking Trails ranking is sorted on exactly this signal.
  2. 10 days ahead: First reliable signal of settled vs unsettled spell. For multi-day treks, look for 3+ stable days over your route.
  3. 5 days ahead: Lock packing weight. Use the Decision Card and Packing List to set the forecast and see what to add.
  4. Day before: Hourly precision. Confirm storm timing on alpine routes. Decide morning departure time.
  5. Trail morning: Radar at 6 AM and 9 AM. Tell someone your route and ETA. Re-check at lunch on long days — turn around if the picture has changed.

Everything else

Hiking Weather FAQ

Twenty-five answers covering hiking weather basics, safety thresholds, trail planning, gear and the Hiking Score.

Hiking weather basics

What is the perfect hiking temperature?
There is no universal ideal. Many hikers find cool to mild conditions (roughly 10–20°C) comfortable because climbing produces a lot of body heat. That range is also where the Hiking Score gives no temperature penalty. Hot, humid weather increases heat-illness risk, and cold, wet, windy weather increases hypothermia risk — fitness, sun, shade and effort all shift where those limits sit for you.
What wind speed is too strong for hiking?
There is no single safe limit; it depends on terrain, gusts and experience. As a planning guide, the Hiking Score starts penalising wind above 15 km/h and treats sustained wind above 45 km/h as a serious problem. Gusts matter more than averages on exposed ridges and summits, and summit wind is often much stronger than the valley forecast. When balance is affected, choose a lower or more sheltered route.
What does 30% chance of rain mean for hiking?
The percentage on our pages comes from Open-Meteo: it is the probability of at least 0.1 mm of precipitation at that forecast location during the hour (or the highest hourly value for the day), based on the spread of several forecast model runs. It is not the share of your hike that will be wet, and it says nothing about how heavy the rain will be. Look at expected rainfall amount, hourly timing, and the radar trend as well. A 30% afternoon storm risk on an exposed alpine route deserves more caution than 30% morning drizzle in forest.
How much does temperature drop with elevation?
On average about 6.5°C per 1,000 m — the standard-atmosphere average. On a given day the drop varies: in dry, well-mixed air it can approach about 10°C per 1,000 m, in cloudy, saturated air it is closer to 5°C, and in temperature inversions it can even get warmer with height. The Trail Weather Matrix uses the 6.5°C average, so treat summit figures as an estimate.
When are afternoon thunderstorms most likely?
In many mountain ranges, summer thunderstorms most often build in the afternoon as the ground heats, but they can form at any time. A common mitigation is an early start so you are off summits and exposed ridges before clouds build. Check the hourly forecast and watch the sky.

Safety thresholds

When is it too hot to hike safely?
There is no single cut-off — heat-illness risk depends on temperature, humidity, sun, effort, acclimatisation and health. Follow local heat warnings. On hot days, start early, choose shaded and shorter routes, carry more water, and turn back at the first signs of heat exhaustion. The Hiking Score penalises temperatures above 25°C increasingly steeply.
When is lightning a real risk above treeline?
Whenever thunderstorms are possible. The US National Weather Service says there is no safe place outside when thunderstorms are in the area, and that if you can hear thunder you are likely within striking distance. Plan routes so you can reach shelter, watch for building clouds, and get off summits and ridges early. If caught out, move away from peaks, isolated trees and metal objects.
What conditions cause most hiking hypothermia?
Hypothermia does not require freezing temperatures. Being wet and exposed to wind in cool weather is a common route to it, especially once you stop moving (rest break, injury, navigation pause). Waterproof and insulating layers, and turning back early, reduce the risk.
When should I turn around?
Storm cells building before your summit window closes; thunder or building storm clouds; wind strong enough to affect your balance; cloud or fog on terrain you cannot navigate; a member of your party showing symptoms of altitude sickness, hypothermia or heat exhaustion. Turning back at the right time is the single most important mountain skill.

Trail planning & seasons

What is the best season for hiking?
Depends on the trail. Alps and Rockies: late June to early September for snow-free passes. Patagonia: November to March (austral summer). High Andes (Inca Trail): May to September (dry season). Mediterranean trails (Cinque Terre): April to October but avoid July–August heat at midday. The Best Hiking Trails section above lists optimal months per trail.
How do I plan a multi-day trek around weather?
Use climatological averages 6+ months out to pick the trip window; 10 days out, watch the synoptic forecast for a settled vs unsettled spell; 5 days out, lock packing weight; the day before, confirm the morning of each day with hourly precipitation forecasts. Multi-day treks need flexibility — build a rest day into the itinerary you can spend in shelter.
Do I need a permit for famous hikes?
Half Dome (Yosemite), Inca Trail, Angels Landing, Kilimanjaro, Mount Fuji, Cinque Terre Sentiero Azzurro and Torres del Paine W Trek all require permits — most book out months ahead. The Plan My Hike tool above flags permit-required trails when you toggle "permits OK".
Can I hike with my dog?
On most European trails yes (Trolltunga, Preikestolen, Snowdon, Camino Francés, Cinque Terre — though with leash rules). On US national park summit trails generally no (Half Dome, Bright Angel, Angels Landing). The CompareTrails tool above shows dog-friendly status per trail.

Gear & packing

What are the Ten Essentials?
Navigation (map + compass or GPS), sun protection (sunscreen + hat + sunglasses), insulation (extra layers), illumination (headlamp + spare batteries), first-aid supplies, fire-starting kit, repair kit + tools, nutrition (extra day of food), hydration (extra water), emergency shelter. The Live Packing List above adds weather-conditional items on top of these.
How much water should I carry?
Needs vary with heat, effort, body size and altitude. A common rule of thumb is around half a litre per hour of moderate hiking in mild weather, and more in heat. Check the land manager's advice for hot routes, know where reliable refills are, and carry a filter or purification tablets if you plan to refill from streams.
Do I really need a hardshell jacket?
It is wise whenever rain is possible or you are going above treeline, regardless of the forecast. A packable rain shell with taped seams (not a windbreaker) is the minimum. Wet cotton and wet down lose most of their insulation. The Live Packing List flags a shell when rain probability is above 50% or storm risk is above 30%.
Are trekking poles worth it?
Many hikers find them helpful on long descents because they take some load off the knees, and they add stability on wet rocks and roots. The Live Packing List above flags them when rain probability is above 50% or storm risk is up.

How our Hiking Score works

What is the Hiking Score?
A 0–100 score combining air temperature, wind, rain probability, thunderstorm risk, UV index and visibility. 85+ is perfect trail weather. Below 35 is "stay off the trail". Computed by the same pure function that powers the Decision Card, the Trail Weather Matrix, the 8 Live Trailheads and the Best Hiking Trails ranking.
How is the Hiking Score calculated?
The score starts at 100 and subtracts a penalty for each factor. Large penalties for storm risk, strong wind or extreme heat can push it into "Stay off the trail" on their own. It is a SnapWeather planning aid, not a safety classification. The Decision Card shows the per-factor breakdown.
Why does the score drop on alpine routes?
The Trail Weather Matrix applies a −6.5°C / 1,000 m lapse rate, adds 8–15 km/h of altitude wind above 1,000 m, increases storm risk on alpine terrain, and reduces visibility on high summits. A "stable high pressure" valley day scoring 100 commonly scores in the 50s on a 3,500 m summit on the same day.
Is the Hiking Score accurate for my exact trail?
It uses the closest Open-Meteo grid cell plus a published lapse rate. Real microclimate — which side of the col, tree cover, snowfield, aspect — can shift felt temperature and storm timing noticeably. Use the score as a strong directional signal, not absolute truth, and always check the morning radar before stepping on the trail.

Transparency

Methodology & Editorial Standards

Methodology & Editorial Standards

Full transparency on how every score, threshold and recommendation on this page is produced.

How the Hiking Score is calculated

A SnapWeather formula starts at 100 and subtracts a penalty for each input — air temperature, wind, rain probability, thunderstorm risk, peak UV and visibility (plus rain amount where available). Large storm, wind or heat penalties can push the score into 'Stay off the trail' on their own. It is a planning aid, not a safety classification.

Data sources

Live weather is fetched from Open-Meteo (current + daily + hourly) for every trailhead. Summit temperatures are estimated from valley readings using the 6.5°C / 1000 m standard-atmosphere average (real lapse rates vary from day to day), with extra wind and convective storm risk applied above 1000 m. Trail routes, distances and elevation profiles follow the trail's official park or governing-body publication.

Limitations

Mountain microclimates above 1500 m can diverge sharply from valley forecasts — treat the score as directional, not absolute. Storm timing on alpine routes is hard to nail beyond 48 hours. Visibility is estimated from precipitation probability when not directly available.

Last reviewed

This guide was last reviewed on October 27, 2026. Scoring thresholds are reviewed quarterly.

Editorial standards

Recommendations are written to help readers make a real decision, not to optimise for keywords. No generic filler, no AI boilerplate. Every threshold is traceable to a public meteorological reference or a documented internal heuristic.

Safety policy

The score does not read official warnings or live lightning data. Follow mountain and weather warnings, and the NWS rule: when thunder roars, go indoors. Turn around early when conditions change.

Is today a good hiking day here?

Live hiking verdicts for popular trail bases.