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Weather in Riverside, California for December 2026

Your guide to Riverside weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Riverside at the beginning of December is 21 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.2 °C by the end of December.

    • Rain 🌧️

  • With an average of 4 rainy days, Riverside experiences minimal rainfall in December.

    • More

  • Is December a good time to visit Riverside? check out the best time to travel to Riverside page.

  • ✨ Is December a good time to visit Riverside? – Ask the AI Weatherman

Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/10°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
45 %
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
20°
5
Sunny
23°
6
Sunny
23°
7
Sunny
22°
8
Sunny
21°
9
Sunny
23°
10
Sunny
23°
11
Overcast
22°
12
Sunny
18°
13
Sunny
19°
14
Overcast
21°
15
Sunny
22°
16
Sunny
24°
17
Partly cloudy
24°
18
Sunny
24°
19
Light rain
21°
20
Light rain
21°
21
Patchy light rain with thunder
20°
22
Overcast
19°
23
Partly cloudy
19°
24
Heavy rain
18°
25
Patchy rain possible
19°
26
Light rain
18°
27
Patchy rain possible
15°
28
Overcast
17°
29
Patchy rain possible
16°
30
Light rain
14°
31
Light rain
15°

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 3.1
Dec. 2 Sunny
Sunny
 19° /7° 0 mm 3
Dec. 3 Cloudy
Cloudy
 20° /8° 0 mm 3
Dec. 4 Sunny
Sunny
 20° /9° 0 mm 3
Dec. 5 Sunny
Sunny
 23° /9° 0 mm 3
Dec. 6 Sunny
Sunny
 23° /11° 0 mm 2.9
Dec. 7 Sunny
Sunny
 22° /10° 0 mm 2.9
Dec. 8 Sunny
Sunny
 21° /8° 0 mm 2.9
Dec. 9 Sunny
Sunny
 23° /8° 0 mm 2.9
Dec. 10 Sunny
Sunny
 23° /8° 0 mm 2.9
Dec. 11 Overcast
Overcast
 22° /11° 0 mm 2.9
Dec. 12 Sunny
Sunny
 18° /10° 0 mm 2.8
Dec. 13 Sunny
Sunny
 19° /8° 0 mm 2.8
Dec. 14 Overcast
Overcast
 21° /11° 0 mm 2.8
Dec. 15 Sunny
Sunny
 22° /10° 0 mm 2.8
Dec. 16 Sunny
Sunny
 24° /11° 0 mm 2.8
Dec. 17 Partly cloudy
Partly cloudy
 24° /12° 0 mm 2.8
Dec. 18 Sunny
Sunny
 24° /14° 0 mm 2.8
Dec. 19 Light rain
Light rain
 21° /13° 2.5 mm 2.8
Dec. 20 Light rain
Light rain
 21° /12° 2.9 mm 2.8
Dec. 21 Patchy light rain with thunder
Patchy light rain with thunder
 20° /11° 2 mm 2.8
Dec. 22 Overcast
Overcast
 19° /11° 0.9 mm 2.8
Dec. 23 Partly cloudy
Partly cloudy
 19° /10° 0 mm 2.8
Dec. 24 Heavy rain
Heavy rain
 18° /10° 28.1 mm 2.8
Dec. 25 Patchy rain possible
Patchy rain possible
 19° /10° 1 mm 2.8
Dec. 26 Light rain
Light rain
 18° /10° 6.9 mm 2.8
Dec. 27 Patchy rain possible
Patchy rain possible
 15° /9° 1.4 mm 2.8
Dec. 28 Overcast
Overcast
 17° /7° 0.6 mm 2.8
Dec. 29 Patchy rain possible
Patchy rain possible
 16° /8° 0 mm 2.8
Dec. 30 Light rain
Light rain
 14° /9° 3.6 mm 2.9
Dec. 31 Light rain
Light rain
 15° /10° 5 mm 2.9
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 10°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Riverside during December?
Moderate rainfall is anticipated in Riverside during December, with a total of 54.6 mm spread over approximately 4 days. Considering plans for rainy days is advisable.

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 4 rainy days in December with a total of 54.6 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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