December

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December

San Bernardino Weather December

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November

January

Temperatures trend during December in San Bernardino

See the weather trend as well as the moving average line

December weather in San Bernardino day by day

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November January

Date	Weather	Temperatures	Rain	UV
Dec. 1	Sunny	20° /9°	0 mm	5
Dec. 2	Sunny	19° /6°	0 mm	5
Dec. 3	Sunny	20° /7°	0 mm	5
Dec. 4	Sunny	21° /10°	0 mm	5
Dec. 5	Sunny	23° /8°	0 mm	6
Dec. 6	Sunny	22° /10°	0 mm	6
Dec. 7	Sunny	22° /9°	0 mm	6
Dec. 8	Sunny	21° /9°	0 mm	6
Dec. 9	Sunny	22° /9°	0 mm	6
Dec. 10	Sunny	24° /9°	0 mm	6
Dec. 11	Overcast	22° /10°	0 mm	5
Dec. 12	Sunny	18° /9°	0 mm	5
Dec. 13	Sunny	18° /7°	0 mm	5
Dec. 14	Partly cloudy	19° /9°	0 mm	5
Dec. 15	Sunny	21° /8°	0 mm	6
Dec. 16	Sunny	23° /10°	0 mm	6
Dec. 17	Overcast	23° /11°	0 mm	6
Dec. 18	Sunny	22° /11°	0 mm	6
Dec. 19	Light rain shower	21° /12°	2.3 mm	5
Dec. 20	Light rain shower	19° /11°	3.6 mm	3
Dec. 21	Patchy light rain with thunder	18° /9°	1.8 mm	3
Dec. 22	Light rain	18° /10°	1.3 mm	3
Dec. 23	Sunny	18° /8°	0.7 mm	4
Dec. 24	Overcast	15° /9°	80.3 mm	2
Dec. 25	Partly cloudy	15° /7°	7 mm	3
Dec. 26	Partly cloudy	13° /7°	27 mm	3
Dec. 27	Overcast	14° /6°	0 mm	3
Dec. 28	Cloudy	18° /5°	0 mm	4
Dec. 29	Overcast	18° /7°	0 mm	4
Dec. 30	Light rain shower	14° /7°	4.1 mm	3
Dec. 31	Light rain shower	16° /9°	11.3 mm	2
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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.

Change Month

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 18° 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 21.6 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 during December?

The average wind speed in San Bernardino during December is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in San Bernardino

Explore the daily rainfall trends and prepare for San Bernardinos December weather 💧

Typically, San Bernardino has 7 rainy days in December with a total of 21.6 mm of rainfall.

UV exposure in San Bernardino during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️

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Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
		1 20°	2 19°	3 20°	4 21°	5 23°
6 22°	7 22°	8 21°	9 22°	10 24°	11 22°	12 18°
13 18°	14 19°	15 21°	16 23°	17 23°	18 22°	19 21°
20 19°	21 18°	22 18°	23 18°	24 15°	25 15°	26 13°
27 14°	28 18°	29 18°	30 14°	31 16°