Ushuaia weather by month
Ushuaia runs from about -3°C in June to 10°C in February, with April the wettest month at 140 mm.
warmest month
February
10°C
coolest month
June
-3°C
wettest month
April
140 mm
worst air month
January
2 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 9°C | 116 mm | 303 h | 2 |
| February | 10°C | 92 mm | 226 h | 2 |
| March | 7°C | 112 mm | 247 h | 2 |
| April | 4°C | 140 mm | 147 h | 2 |
| May | 1°C | 127 mm | 104 h | 2 |
| June | -3°C | 38 mm | 99 h | 2 |
| July | 0°C | 97 mm | 113 h | 2 |
| August | 1°C | 51 mm | 137 h | 1 |
| September | 1°C | 99 mm | 214 h | 1 |
| October | 5°C | 77 mm | 237 h | 1 |
| November | 7°C | 101 mm | 323 h | 1 |
| December | 9°C | 113 mm | 297 h | 2 |
About 2,447 hours of sun a year. Roughly 117 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.