San Pedro de Atacama weather by month
San Pedro de Atacama runs from about 11°C in July to 22°C in January, with February the wettest month at 15 mm.
warmest month
January
22°C
coolest month
July
11°C
wettest month
February
15 mm
worst air month
January
5 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 22°C | 2 mm | 399 h | 5 |
| February | 21°C | 15 mm | 342 h | 4 |
| March | 20°C | 0 mm | 363 h | 2 |
| April | 17°C | 0 mm | 332 h | 2 |
| May | 13°C | 0 mm | 336 h | 3 |
| June | 11°C | 0 mm | 319 h | 5 |
| July | 11°C | 0 mm | 330 h | 5 |
| August | 11°C | 0 mm | 340 h | 5 |
| September | 16°C | 0 mm | 349 h | 3 |
| October | 18°C | 1 mm | 386 h | 3 |
| November | 19°C | 0 mm | 386 h | 3 |
| December | 19°C | 0 mm | 402 h | 4 |
About 4,284 hours of sun a year. Roughly 2 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.