Climate averages 1991–2020
São Sebastião (Sao Paulo), Brazil weather
in December.
A warm, very wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in São Sebastião (Sao Paulo), Brazil: daytime highs average 26.7°C and nights cool to about 22.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 214 mm of rain on roughly 19 days, which makes December a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 34 min on an average December day.
The nearest other city in this atlas is Caraguatatuba (16 km away). In December its highs average 27.6°C, 0.9°C warmer than São Sebastião (Sao Paulo), Brazil, with 223 mm of rain.
Among the 448 cities listed in Brazil, São Sebastião (Sao Paulo), Brazil ranks joint 344th of 448 for the warmest December highs and joint 285th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; São Sebastião (Sao Paulo), Brazil is 1.8°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 27.8°C, and monthly rainfall rises from 214 mm to 277 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
São Sebastião (Sao Paulo), Brazil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.8°C23.9°C | 23.9°C | 277 | 22.3 | 13.413 h |
| February | 28.1°C24.1°C | 24.1°C | 231 | 19.7 | 12.913 h |
| March | 27.2°C23.4°C | 23.4°C | 236 | 20.4 | 12.212 h |
| April | 26.0°C22.0°C | 22.0°C | 130 | 13.7 | 11.612 h |
| May | 24.1°C19.9°C | 19.9°C | 115 | 11.8 | 11.011 h |
| June | 23.5°C18.7°C | 18.7°C | 82 | 9.5 | 10.711 h |
| July | 22.9°C18.0°C | 18.0°C | 92 | 8.7 | 10.811 h |
| August | 23.0°C18.1°C | 18.1°C | 76 | 8.9 | 11.311 h |
| September | 23.4°C19.0°C | 19.0°C | 132 | 13.8 | 11.912 h |
| October | 24.3°C20.2°C | 20.2°C | 146 | 15.2 | 12.613 h |
| November | 24.9°C21.0°C | 21.0°C | 187 | 17.5 | 13.213 h |
| December, selected | 26.7°C22.7°C | 22.7°C | 214 | 19.2 | 13.614 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Caraguatatuba in DecemberBrazil · 16 kmHigh 27.6°C · Low 22.5°C · 223 mm rain
- Ubatuba in DecemberBrazil · 50 kmHigh 26.0°C · Low 21.9°C · 164 mm rain
- Jacareí in DecemberBrazil · 76 kmHigh 27.0°C · Low 18.7°C · 172 mm rain
- Caçapava in DecemberBrazil · 79 kmHigh 27.2°C · Low 18.7°C · 227 mm rain
- São José dos Campos in DecemberBrazil · 81 kmHigh 27.2°C · Low 18.7°C · 172 mm rain
- Taubaté in DecemberBrazil · 83 kmHigh 27.1°C · Low 18.4°C · 219 mm rain
- Mogi das Cruzes in DecemberBrazil · 84 kmHigh 25.8°C · Low 18.0°C · 198 mm rain
- Pindamonhangaba in DecemberBrazil · 93 kmHigh 27.6°C · Low 18.8°C · 219 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for São Sebastião) is explained once on the São Sebastião (Sao Paulo), Brazil year overview and on the Sources, method and limits page.