San Bernardino Weather in December
What's the weather like in San Bernardino (Cordillera) in December 2024?
The climate in San Bernardino during December can be summarized as hot and wet.
December is in the summer in San Bernardino and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a warm 32°C (90°F), whilst at night 21°C (71°F) is normal.
| Daytime temperature | 32.2°C 90°F |
|---|---|
| Nightly temperature | 21.4°C 70.5°F |
| Average temperature | 26.8°C 80.2°F |
| Daily sunshine | 9.6 hrs |
| Avg rainfall | 147 mm 5.8 ins |
| Rainy days | 7 days |
| Sea temperature | 22.4°C 72.3°F |
| Humidity | 66% |
| Windspeed | 12.6kph 8 mph |
On average December is the 6th wettest month of the year in San Bernardino with around 147mm 5.8 inches of rain making it a wet 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 9.6 hours of sunshine per day.
December temperatures in San Bernardino
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 San Bernardino in December 2024.
Other monthly averages
Best places to visit in December
San Bernardino weather stats
| Hottest month: | January | 32.5°C 90.5°F |
|---|---|---|
| Driest month: | July | 69mm 2.7ins |
| Sunniest month: | December | 9.6hrs |
| Coldest month: | June | 22°C 71.6°F |
| Wettest month: | January | 166mm 6.5ins |
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