San Bernardino County
December
Weather in San Bernardino County for December 2024
Your guide to San Bernardino County weather in December - trends and predictions
In general, the average temperature in San Bernardino County at the beginning of December is 21 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16 °F by the end of December.
San Bernardino County sees moderate rainfall in December, averaging 7 rainy days.
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24
Dry days
7
Rainy days
0
Snow days
19°/9°
Temperatures
9 km/h
Avg max wind
45 %
Avg humidity
San Bernardino County in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | ||||||
| 2  19° | 3 22° | 4  23° | 5 26° | 6 22° | 7 18° | 8 20° |
| 9 18° | 10 23° | 11 20° | 12 18° | 13 19° | 14 20° | 15 22° |
| 16 23° | 17 23° | 18  19° | 19 16° | 20 16° | 21  17° | 22  16° |
| 23 16° | 24 16° | 25 18° | 26 17° | 27 17° | 28  19° | 29 18° |
| 30 12° | 31 11° |
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Temperatures trend during December in San Bernardino County
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 | Partly cloudy | 17° /7° | 0 mm | 5 | |
| Dec. 2 | Sunny | 19° /6° | 0 mm | 5 | |
| Dec. 3 | Sunny | 22° /7° | 0 mm | 6 | |
| Dec. 4 | Overcast | 23° /10° | 0 mm | 5 | |
| Dec. 5 | Sunny | 26° /11° | 0 mm | 7 | |
| Dec. 6 | Sunny | 22° /11° | 0 mm | 6 | |
| Dec. 7 | Partly cloudy | 18° /8° | 0 mm | 5 | |
| Dec. 8 | Sunny | 20° /6° | 0 mm | 6 | |
| Dec. 9 | Partly cloudy | 18° /6° | 0 mm | 5 | |
| Dec. 10 | Sunny | 23° /7° | 0 mm | 6 | |
| Dec. 11 | Overcast | 20° /9° | 0 mm | 5 | |
| Dec. 12 | Sunny | 18° /7° | 0 mm | 5 | |
| Dec. 13 | Sunny | 19° /8° | 0 mm | 5 | |
| Dec. 14 | Overcast | 20° /7° | 0 mm | 5 | |
| Dec. 15 | Partly cloudy | 22° /9° | 0 mm | 6 | |
| Dec. 16 | Sunny | 23° /12° | 0 mm | 6 | |
| Dec. 17 | Partly cloudy | 23° /10° | 0 mm | 6 | |
| Dec. 18 | Patchy rain possible | 19° /11° | 0.5 mm | 4 | |
| Dec. 19 | Light rain shower | 16° /9° | 8.8 mm | 4 | |
| Dec. 20 | Light rain shower | 16° /10° | 10.9 mm | 4 | |
| Dec. 21 | Patchy light rain with thunder | 17° /8° | 6.7 mm | 4 | |
| Dec. 22 | Light drizzle | 16° /12° | 6.4 mm | 4 | |
| Dec. 23 | Sunny | 16° /7° | 0 mm | 5 | |
| Dec. 24 | Overcast | 16° /10° | 0 mm | 4 | |
| Dec. 25 | Partly cloudy | 18° /11° | 0 mm | 5 | |
| Dec. 26 | Partly cloudy | 17° /9° | 0 mm | 5 | |
| Dec. 27 | Overcast | 17° /10° | 0 mm | 4 | |
| Dec. 28 | Cloudy | 19° /11° | 0 mm | 4 | |
| Dec. 29 | Overcast | 18° /8° | 0 mm | 4 | |
| Dec. 30 | Light rain shower | 12° /5° | 9.7 mm | 3 | |
| Dec. 31 | Light rain shower | 11° /5° | 3.8 mm | 3 | |
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Important Notice
Our weather forecast for San Bernardino County 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 County forecast closer to your planned date for the most up-to-date weather information.
San Bernardino County in December - FAQ
What are the expected maximum and minimum temperatures in San Bernardino County during December?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Bernardino County during December?
In December, San Bernardino County can expect light to moderate rainfall, totaling 46.7 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Bernardino County during December?
The average wind speed in San Bernardino County during December is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
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Where is San Bernardino County?Get accurate weather forecasts for San Bernardino County, located at latitude 34.063 and longitude -117.651. Stay updated with localized weather information tailored for San Bernardino County.
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