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Weather in Riverside, California for December 2025

Your guide to Riverside weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Riverside has been nearly identical to the historical average, with a temperature of 22 °F (showing only a slight deviation of 0.1 °F).

  • The forecast for the next days in Riverside predicts temperatures to be around 22 °F, close to the historical average.

  • In general, the average temperature in Riverside at the beginning of December is 21.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °F by the end of December.

    • Rain 🌧️

  • Riverside experiences moderate rainfall in December, with an average of 7 rainy days and a total precipitation of 23.6 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
24
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/9°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
41 %
Avg humidity

Riverside Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
20°
2
Sunny
19°
3
Cloudy
20°
4
Sunny
21°
5
Sunny
23°
6
Sunny
23°
7
Sunny
23°
8
Sunny
22°
9
Sunny
23°
10
Sunny
24°
11
Overcast
23°
12
Sunny
19°
13
Sunny
28°
14
Partly cloudy
28°
15
Sunny
28°
16
Sunny
26°
17
Sunny
24°
18
Partly cloudy
22°
19
Sunny
22°
20
Sunny
21°
21
Sunny
22°
22
Patchy rain possible
19°
23
Patchy rain possible
15°
24
Patchy rain possible
17°
25
Patchy rain possible
15°
26
Sunny
18°
27
Patchy rain possible
17°
28
Overcast
18°
29
Patchy rain possible
16°
30
Patchy rain possible
16°
31
Moderate rain at times
14°

Temperatures trend during December in Riverside

See the weather trend as well as the moving average line

December weather in Riverside day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Sunny
Sunny
 20° /8° 0 mm 6
Dec. 2 Sunny
Sunny
 19° /6° 0 mm 5
Dec. 3 Cloudy
Cloudy
 20° /8° 0 mm 5
Dec. 4 Sunny
Sunny
 21° /8° 0 mm 5
Dec. 5 Sunny
Sunny
 23° /9° 0 mm 6
Dec. 6 Sunny
Sunny
 23° /10° 0 mm 6
Dec. 7 Sunny
Sunny
 23° /9° 0 mm 6
Dec. 8 Sunny
Sunny
 22° /8° 0 mm 6
Dec. 9 Sunny
Sunny
 23° /7° 0 mm 6
Dec. 10 Sunny
Sunny
 24° /8° 0 mm 6
Dec. 11 Overcast
Overcast
 23° /10° 0 mm 6
Dec. 12 Sunny
Sunny
 19° /10° 0 mm 5
Dec. 13 Sunny
Sunny
 28° /9° 0 mm 0.6
Dec. 14 Partly cloudy
Partly cloudy
 28° /13° 0 mm 0.6
Dec. 15 Sunny
Sunny
 28° /12° 0 mm 0.6
Dec. 16 Sunny
Sunny
 26° /15° 0 mm 0.7
Dec. 17 Sunny
Sunny
 24° /15° 0 mm 0
Dec. 18 Partly cloudy
Partly cloudy
 22° /15° 0 mm 5
Dec. 19 Sunny
Sunny
 22° /14° 0 mm 5
Dec. 20 Sunny
Sunny
 21° /14° 0 mm 5
Dec. 21 Sunny
Sunny
 22° /14° 0 mm 5
Dec. 22 Patchy rain possible
Patchy rain possible
 19° /14° 0.4 mm 4
Dec. 23 Patchy rain possible
Patchy rain possible
 15° /12° 2.3 mm 3
Dec. 24 Patchy rain possible
Patchy rain possible
 17° /12° 0.2 mm 3
Dec. 25 Patchy rain possible
Patchy rain possible
 15° /10° 0.1 mm 3
Dec. 26 Sunny
Sunny
 18° /10° 0 mm 4
Dec. 27 Patchy rain possible
Patchy rain possible
 17° /10° 1.8 mm 4
Dec. 28 Overcast
Overcast
 18° /8° 0.7 mm 5
Dec. 29 Patchy rain possible
Patchy rain possible
 16° /9° 0 mm 4
Dec. 30 Patchy rain possible
Patchy rain possible
 16° /8° 2.9 mm 4
Dec. 31 Moderate rain at times
Moderate rain at times
 14° /9° 6 mm 3
Next
Important Notice
Our weather forecast for Riverside 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 Riverside forecast closer to your planned date for the most up-to-date weather information.
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Riverside in December - FAQ

What are the expected maximum and minimum temperatures in Riverside during December?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Riverside during December?
In December, Riverside can expect light to moderate rainfall, totaling 23.6 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Riverside during December?
The average wind speed in Riverside during December is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Riverside

Explore the daily rainfall trends and prepare for Riversides December weather 💧
Typically, Riverside has 7 rainy days in December with a total of 23.6 mm of rainfall.

UV exposure in Riverside during December

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

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Location coordinates Where is Riverside?

Get accurate weather forecasts for Riverside, located at latitude 33.953 and longitude -117.396. Stay updated with localized weather information tailored for Riverside.

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