Arequipa weather by month
Arequipa runs from about 15°C in July to 18°C in January, with February the wettest month at 111 mm.
warmest month
January
18°C
coolest month
July
15°C
wettest month
February
111 mm
worst air month
June
28 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 18°C | 40 mm | 341 h | 11 |
| February | 16°C | 111 mm | 289 h | 6 |
| March | 16°C | 72 mm | 313 h | 13 |
| April | 17°C | 0 mm | 337 h | 17 |
| May | 17°C | 0 mm | 340 h | 25 |
| June | 16°C | 0 mm | 313 h | 28 |
| July | 15°C | 0 mm | 342 h | 24 |
| August | 15°C | 0 mm | 355 h | 20 |
| September | 17°C | 0 mm | 349 h | 21 |
| October | 17°C | 0 mm | 381 h | 19 |
| November | 16°C | 9 mm | 364 h | 18 |
| December | 16°C | 0 mm | 366 h | 18 |
About 4,090 hours of sun a year. Roughly 23 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.