São Paulo weather by month
São Paulo runs from about 16°C in July to 22°C in February, with December the wettest month at 236 mm.
warmest month
February
22°C
coolest month
July
16°C
wettest month
December
236 mm
worst air month
July
27 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 22°C | 197 mm | 314 h | 16 |
| February | 22°C | 175 mm | 275 h | 16 |
| March | 22°C | 142 mm | 285 h | 25 |
| April | 21°C | 54 mm | 279 h | 19 |
| May | 20°C | 38 mm | 268 h | 21 |
| June | 18°C | 6 mm | 271 h | 20 |
| July | 16°C | 37 mm | 250 h | 27 |
| August | 17°C | 58 mm | 297 h | 23 |
| September | 22°C | 14 mm | 307 h | 20 |
| October | 20°C | 91 mm | 259 h | 20 |
| November | 21°C | 199 mm | 254 h | 19 |
| December | 22°C | 236 mm | 276 h | 18 |
About 3,335 hours of sun a year. Roughly 126 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.