The Best Day Index ranks fifty major travel destinations by today's Weather Score, a 0-100 composite built from temperature comfort (40 percent), rain risk (30 percent), wind (20 percent) and the WMO weather code (10 percent). Every city in the index receives one of three verdicts rather than a wall of numbers: Go for scores of 72 and above with no blocking weather code, Wait for scores between 55 and 71 or a decent score paired with rain, and Skip for anything below 55 or with active rain, showers or thunderstorms. Rain, shower and thunderstorm codes act as absolute blocks, so a wet day can never be labelled a Go regardless of how mild the temperature is. Scores are recalculated on every page load from the latest Open-Meteo forecast run, which blends the ECMWF, GFS and ICON models, so the ranking shifts through the day as new model runs land. The index covers Europe, North America, Asia, Oceania, Africa and South America, and can be filtered by region so you can compare like with like — a 21 degree stable day in Lisbon against a 34 degree day in Dubai with a high afternoon storm probability. That comparison is the point: the index rewards conditions you can plan around, not peak temperature. Each city name links through to its own Best Day page with a full fourteen-day ranked forecast, activity-specific verdicts for hiking, beach, photography and sightseeing, sunrise and sunset times, and a forecast confidence meter that shows how much weight to give days further out. The complete formulas, thresholds and data sources behind the ranking are published on the Snap Weather methodology page. Nothing in the index is hand-curated, sponsored or weighted toward any destination.
Weather decisions in your destination are rarely about whether it's "nice" — they're about matching what you want to do with the conditions that actually show up. A perfectly sunny day at 34 °C can be a bad day for hiking, a mild overcast morning can be ideal for portrait photography, and a low-cloud evening can be a spectacular night for full-moon shots. Snap Weather is built to answer decision questions like these directly, rather than making you interpret raw forecast numbers on your own.
This page pulls current ensemble forecast data for your destination and reframes it around one specific decision. If the conditions clearly support the plan, we say so; if they don't, we say that too and — where possible — suggest the next date in the outlook window that does. Recommendations respect timezone, sunrise/sunset, forecast uncertainty and dealbreaker thresholds (heavy rain, dangerous wind, thick fog, hazardous UV), so a warning stays a warning even when everything else looks pleasant.
The decision score you see on this page is a weighted composite of the factors most important to the question in the page title. Weights differ by decision type, and every factor has a "dealbreaker" cap: if a single factor is dangerous or ruins the plan, the total score is pulled down regardless of the other factors.
Because dealbreaker caps apply, a "poor" score is not simply a low weather score — it means at least one factor makes the plan meaningfully worse or unsafe. That's the difference between a decision engine and a raw weather feed.
Snap Weather pulls ensemble forecast data every hour from Open-Meteo and combines it with high-precision solar and lunar calculations done in the destination's local timezone. We translate raw numbers into a direct answer to the question in the page title. Every score is capped so a single dealbreaker — heavy rain, dangerous wind, thick fog, hazardous UV — cannot be hidden by otherwise pleasant averages, and every recommendation includes a plain-English explanation of why we picked what we picked.
Ensemble forecasting matters because it captures uncertainty: instead of a single deterministic run, we look at how tightly a spread of model runs agrees. When agreement is high, we mark the forecast as high-confidence and you can plan around it. When runs diverge — often more than 72 hours out — we mark the day as lower confidence and suggest re-checking closer to the date. This matches how professional meteorologists reason about a forecast, and it beats the false certainty most consumer weather apps display.
The methodology is documented in full on our methodology page, and the scoring code for each decision type — travel days, photography, weddings, activities, ski, running, cycling — is written in a shared, activity-aware library so recommendations stay consistent across every page on the site.
All times on this page render in the local timezone of the selected location, not your device timezone, so a sunrise time you read from London still means "sunrise as seen from the destination". Weather data comes from Open-Meteo's ensemble models with hourly refresh, giving global coverage down to roughly 11 km resolution. Astronomical data — sunrise, sunset, twilight, moon phase, illumination and moon altitude — comes from the Sunrise-Sunset API with Open-Meteo as a resilient fallback, and every calculation is done in the target location's timezone rather than the browser's, so daylight-saving transitions, high-latitude twilight and equatorial no-twilight days all render correctly.
We publish a last-updated timestamp on the live page so you can see exactly how fresh the numbers are, and we display forecast confidence next to each day so you know when it's safe to lock in plans and when to check back after the next model run. The interactive tool at the top of this page is fully client-side — no accounts, no paywall, no email required — and it works on mobile and desktop equally well.
Ensemble weather data refreshes hourly from Open-Meteo. Solar and lunar timings are re-computed on every page load, so a page you refresh at midday and again at 6 pm can show meaningfully different scores if a model run has arrived in between.
Yes. Every forecast, decision score, month-by-month guide and photography timing on Snap Weather is free, no account required and no data captured beyond anonymous analytics. If it saves you a trip or a shoot, telling a friend is the only "payment" we ask for.
We use Open-Meteo's ensemble which blends leading global models (ECMWF, GFS, ICON) and downscales to ~11 km resolution. This is the same model family used by many professional planning tools, exposed here in a decision-friendly way.
Yes — all sunrise, sunset, twilight and moon times are calculated in the destination's local timezone, so daylight-saving transitions are handled automatically. You should never need to add or subtract an hour manually.
Trust decays with time. Days 1–3 are typically very reliable, days 4–7 are directionally reliable (good/bad but not exact), and days 8–14 give you a broad sense of the pattern. That's why we surface confidence alongside every score.
Snap Weather is a weather decision engine covering 11M+ locations worldwide. If you're on the live site, the interactive forecast for this page loads automatically — no reload required.