WEATHER · CLIMATE NORMALS · 1991–2020
São Paulo Climate — Averages by Month
What the weather in São Paulo, BRaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | 22.7 °C | 229.7 mm · wettest |
| February | 23.0 °C · warmest | 171.7 mm |
| March | 22.1 °C | 146.8 mm |
| April | 20.8 °C | 66.0 mm |
| May | 18.1 °C | 63.7 mm |
| June | 17.2 °C | 48.5 mm |
| July | 16.7 °C · coldest | 52.8 mm |
| August | 17.7 °C | 40.0 mm |
| September | 19.0 °C | 89.4 mm |
| October | 20.4 °C | 116.1 mm |
| November | 20.8 °C | 152.4 mm |
| December | 22.2 °C | 177.8 mm |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest São Paulo — centred at 23.50°S, 46.75°W. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.