San Bernardino
December
Weather in San Bernardino for December 2024
Your guide to San Bernardino weather in December - trends and predictions
In general, the average temperature in San Bernardino at the beginning of December is 20.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °F by the end of December.
San Bernardino sees moderate rainfall in December, averaging 6 rainy days.
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25
Dry days
6
Rainy days
0
Snow days
17°/8°
Temperatures
8 km/h
Avg max wind
44 %
Avg humidity
San Bernardino in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | ||||||
| 2 19° | 3 22° | 4  23° | 5 25° | 6 21° | 7  17° | 8 17° |
| 9 18° | 10 22° | 11 20° | 12 16° | 13 17° | 14 17° | 15 22° |
| 16 21° | 17 20° | 18  16° | 19  17° | 20 16° | 21  16° | 22  14° |
| 23 16° | 24 16° | 25 15° | 26 15° | 27 14° | 28 16° | 29 16° |
| 30 9° | 31 11° |
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Temperatures trend during December in San Bernardino
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 | Sunny | 16° /5° | 0 mm | 5 | |
| Dec. 2 | Sunny | 19° /4° | 0 mm | 5 | |
| Dec. 3 | Sunny | 22° /5° | 0 mm | 6 | |
| Dec. 4 | Overcast | 23° /12° | 0 mm | 5 | |
| Dec. 5 | Sunny | 25° /9° | 0 mm | 7 | |
| Dec. 6 | Sunny | 21° /11° | 0 mm | 6 | |
| Dec. 7 | Partly cloudy | 17° /8° | 0 mm | 5 | |
| Dec. 8 | Sunny | 17° /6° | 0 mm | 5 | |
| Dec. 9 | Sunny | 18° /6° | 0 mm | 5 | |
| Dec. 10 | Sunny | 22° /5° | 0 mm | 6 | |
| Dec. 11 | Overcast | 20° /12° | 0 mm | 5 | |
| Dec. 12 | Sunny | 16° /8° | 0 mm | 5 | |
| Dec. 13 | Sunny | 17° /9° | 0 mm | 5 | |
| Dec. 14 | Partly cloudy | 17° /7° | 0 mm | 5 | |
| Dec. 15 | Partly cloudy | 22° /8° | 0 mm | 6 | |
| Dec. 16 | Sunny | 21° /8° | 0 mm | 6 | |
| Dec. 17 | Overcast | 20° /10° | 0 mm | 5 | |
| Dec. 18 | Cloudy | 16° /11° | 0 mm | 4 | |
| Dec. 19 | Light rain shower | 17° /10° | 6.8 mm | 4 | |
| Dec. 20 | Light rain shower | 16° /9° | 10.9 mm | 4 | |
| Dec. 21 | Patchy light rain with thunder | 16° /9° | 5.3 mm | 4 | |
| Dec. 22 | Light rain | 14° /9° | 3.8 mm | 3 | |
| Dec. 23 | Sunny | 16° /6° | 0 mm | 5 | |
| Dec. 24 | Overcast | 16° /9° | 0 mm | 4 | |
| Dec. 25 | Partly cloudy | 15° /7° | 0 mm | 5 | |
| Dec. 26 | Partly cloudy | 15° /8° | 0 mm | 5 | |
| Dec. 27 | Overcast | 14° /8° | 0 mm | 3 | |
| Dec. 28 | Cloudy | 16° /7° | 0 mm | 4 | |
| Dec. 29 | Overcast | 16° /8° | 0 mm | 4 | |
| Dec. 30 | Light rain shower | 9° /7° | 7.9 mm | 2 | |
| Dec. 31 | Light rain shower | 11° /6° | 4.3 mm | 3 | |
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Important Notice
Our weather forecast for San Bernardino in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Bernardino forecast closer to your planned date for the most up-to-date weather information.
San Bernardino in December - FAQ
What are the expected maximum and minimum temperatures in San Bernardino during December?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Bernardino during December?
In December, San Bernardino can expect light to moderate rainfall, totaling 39.1 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Bernardino during December?
The average wind speed in San Bernardino during December is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
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