Santa Rosa Weather in December
What's the weather like in Santa Rosa (El Oro) in December 2025?
The climate in Santa Rosa during December can be summarized as hot, humid and dry.
December is in the summer in Santa Rosa and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 21°C (70°F) is normal.
| Daytime temperature | 30.1°C 86.2°F |
|---|---|
| Nightly temperature | 20.9°C 69.6°F |
| Average temperature | 25.5°C 77.9°F |
| Daily sunshine | 5.9 hrs |
| Avg rainfall | 27 mm 1.1 ins |
| Rainy days | 7 days |
| Sea temperature | 22.8°C 73°F |
| Humidity | 83% |
| Windspeed | 14.8kph 9 mph |
On average December is the 6th wettest month of the year in Santa Rosa with around 27mm 1.1 inches of rain making it a dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.9 hours of sunshine per day.
December temperatures in Santa Rosa
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 Santa Rosa in December 2025.
Other monthly averages
Best places to visit in December
Santa Rosa weather stats
| Hottest month: | March | 30.9°C 87.6°F |
|---|---|---|
| Driest month: | August | 14mm 0.6ins |
| Sunniest month: | December | 5.9hrs |
| Coldest month: | August | 27.3°C 81.1°F |
| Wettest month: | March | 143mm 5.6ins |
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