Santos Weather in December
What's the weather like in Santos (São Paulo) in December 2025?
The climate in Santos during December can be summarized as hot, humid and very wet.
December is in the summer in Santos and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 20°C (68°F) is normal.
| Daytime temperature | 28°C 82.3°F |
|---|---|
| Nightly temperature | 19.9°C 67.7°F |
| Average temperature | 23.9°C 75°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 314 mm 12.4 ins |
| Rainy days | 21 days |
| Sea temperature | 24.8°C 76.6°F |
| Humidity | 79% |
| Windspeed | 10.4kph 7 mph |
On average December is the 4th wettest month of the year in Santos with around 314mm 12.4 inches of rain making it a very wet time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
December temperatures in Santos
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Santos in December 2025.
Other monthly averages
Best places to visit in December
Santos weather stats
| Hottest month: | February | 28.9°C 84°F |
|---|---|---|
| Driest month: | August | 112mm 4.4ins |
| Sunniest month: | July | 5.3hrs |
| Coldest month: | July | 22.9°C 73.2°F |
| Wettest month: | February | 357mm 14.1ins |
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