Patagonia records about 375mm of rain across roughly 150 wet days a year, which is a 41% chance on an average day. May is the wettest month at 40mm (11% of the annual total) and January the driest at 15mm. Local rain type: steady rain. Forget umbrellas — Patagonia's 100+ km/h winds will destroy them instantly. Full waterproof shell gear is mandatory. Rain can arrive from clear skies in minutes and disappear just as fast.
Chance of rain on an average day: 41%
Rainfall climatology for Patagonia. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 375mm |
| Rain days per year | 150 |
| Odds on an average day | 41% |
| Wettest month | May — 40mm over 19 days |
| Driest month | January — 15mm over 7 days |
| Rain type | steady rain |
| Best dry window | December through February offers the most stable weather, though wind remains relentless. Clear mornings are the best shooting windows. |
| Worst rain window | May through August (austral winter) brings cold, wet conditions with snow at elevation and limited access to many trails. |
May delivers 167% more rain than January (40mm vs 15mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 11% of the annual total, so rain in Patagonia is spread through the year — there is no season you can rely on being dry.
Patagonia rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 19 days in May against 7 in January — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 15mm | 7 | 23% | 18°C |
| February | 15mm | 7 | 23% | 18°C |
| March | 25mm | 12 | 40% | 16°C |
| April | 35mm | 17 | 57% | 12°C |
| May | 40mm | 19 | 63% | 9°C |
| June | 38mm | 18 | 60% | 5°C |
| July | 35mm | 17 | 57% | 3°C |
| August | 30mm | 14 | 47% | 3°C |
| September | 25mm | 12 | 40% | 5°C |
| October | 22mm | 10 | 33% | 9°C |
| November | 20mm | 9 | 30% | 12°C |
| December | 18mm | 8 | 27% | 16°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Patagonia we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Patagonia records rain on roughly 150 days a year — about a 41% chance on any given day — totalling around 375mm.
May, with about 40mm over 19 rain days. That is 11% of the entire year's rainfall in a single month.
January is the driest month at 15mm across roughly 7 days. December through February offers the most stable weather, though wind remains relentless. Clear mornings are the best shooting windows.
Forget umbrellas — Patagonia's 100+ km/h winds will destroy them instantly. Full waterproof shell gear is mandatory. Rain can arrive from clear skies in minutes and disappear just as fast.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.