Lima weather by month
Lima runs from about 15°C in August to 24°C in February, with December the wettest month at 19 mm.
warmest month
February
24°C
coolest month
August
15°C
wettest month
December
19 mm
worst air month
September
16 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 23°C | 3 mm | 339 h | 16 |
| February | 24°C | 8 mm | 324 h | 15 |
| March | 23°C | 3 mm | 339 h | 15 |
| April | 21°C | 3 mm | 332 h | 15 |
| May | 18°C | 0 mm | 306 h | 15 |
| June | 16°C | 1 mm | 263 h | 15 |
| July | 16°C | 0 mm | 298 h | 14 |
| August | 15°C | 1 mm | 278 h | 14 |
| September | 16°C | 0 mm | 287 h | 16 |
| October | 17°C | 0 mm | 313 h | 15 |
| November | 19°C | 2 mm | 313 h | 14 |
| December | 20°C | 19 mm | 337 h | 13 |
About 3,729 hours of sun a year. Roughly 3 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 2026-05-22. Full method, licences and the list of sources we rejected are on the methodology page.