Climate averages 1991–2020
Santos weather
in December.
A warm, 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 Santos: daytime highs average 27.4°C and nights cool to about 22.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 179 mm of rain on roughly 18 days, which makes December a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 35 min on an average December day.
The nearest other city in this atlas is São Vicente (6 km away). In December its highs average 27.9°C, 0.5°C warmer than Santos, with 234 mm of rain.
Among the 448 cities listed in Brazil, Santos ranks joint 287th of 448 for the warmest December highs and joint 203rd of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Santos is 1.1°C cooler than that mean.
From December to January, average highs rise by 1.0°C to 28.4°C, and monthly rainfall rises from 179 mm to 225 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
Santos climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.4°C23.3°C | 23.3°C | 225 | 20.7 | 13.413 h |
| February | 28.7°C23.5°C | 23.5°C | 202 | 17.4 | 12.913 h |
| March | 27.7°C22.8°C | 22.8°C | 206 | 19.4 | 12.212 h |
| April | 26.5°C21.2°C | 21.2°C | 127 | 13.2 | 11.512 h |
| May | 24.4°C18.7°C | 18.7°C | 125 | 12.7 | 11.011 h |
| June | 23.8°C17.4°C | 17.4°C | 97 | 10.1 | 10.711 h |
| July | 23.2°C16.6°C | 16.6°C | 115 | 9.9 | 10.811 h |
| August | 23.4°C16.8°C | 16.8°C | 94 | 10.2 | 11.311 h |
| September | 24.0°C18.0°C | 18.0°C | 142 | 14.1 | 11.912 h |
| October | 25.0°C19.4°C | 19.4°C | 158 | 16.1 | 12.613 h |
| November | 25.6°C20.4°C | 20.4°C | 174 | 16.7 | 13.313 h |
| December, selected | 27.4°C22.2°C | 22.2°C | 179 | 18.0 | 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
- São Vicente in DecemberBrazil · 6 kmHigh 27.9°C · Low 22.2°C · 234 mm rain
- Praia Grande in DecemberBrazil · 9 kmHigh 27.8°C · Low 22.1°C · 234 mm rain
- Ribeirão Pires in DecemberBrazil · 29 kmHigh 25.7°C · Low 18.7°C · 250 mm rain
- São Bernardo do Campo in DecemberBrazil · 38 kmHigh 25.4°C · Low 18.2°C · 250 mm rain
- Santo André in DecemberBrazil · 39 kmHigh 25.5°C · Low 18.3°C · 250 mm rain
- São Caetano do Sul in DecemberBrazil · 44 kmHigh 25.8°C · Low 18.3°C · 181 mm rain
- Ferraz de Vasconcelos in DecemberBrazil · 47 kmHigh 26.0°C · Low 18.2°C · 198 mm rain
- Mogi das Cruzes in DecemberBrazil · 51 kmHigh 25.8°C · Low 18.0°C · 198 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 Santos) is explained once on the Santos year overview and on the Sources, method and limits page.