Riverside (CA)
December
Weather in Riverside, California for December 2026
Your guide to Riverside weather in December - trends and predictions
In general, the average temperature in Riverside at the beginning of December is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.4 °C by the end of December.
Riverside experiences moderate rainfall in December, with an average of 9 rainy days and a total precipitation of 54.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
22
Dry days
9
Rainy days
0
Snow days
20°/10°
Temperatures
9 km/h
Avg max wind
44 %
Avg humidity
Riverside Weather December
Move between months or click on a day
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
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Sunny | 20° /8° | 0 mm | 6 | |
| Dec. 2 | Sunny | 19° /6° | 0 mm | 5 | |
| Dec. 3 |  Cloudy | 20° /8° | 0 mm | 5 | |
| Dec. 4 | Sunny | 21° /8° | 0 mm | 5 | |
| Dec. 5 | Sunny | 23° /9° | 0 mm | 6 | |
| Dec. 6 | Sunny | 23° /10° | 0 mm | 6 | |
| Dec. 7 | Sunny | 23° /9° | 0 mm | 6 | |
| Dec. 8 | Sunny | 22° /8° | 0 mm | 6 | |
| Dec. 9 | Sunny | 23° /7° | 0 mm | 6 | |
| Dec. 10 | Sunny | 24° /8° | 0 mm | 6 | |
| Dec. 11 |  Overcast | 23° /10° | 0 mm | 6 | |
| Dec. 12 | Sunny | 19° /10° | 0 mm | 5 | |
| Dec. 13 | Sunny | 20° /8° | 0 mm | 5 | |
| Dec. 14 | Overcast | 21° /11° | 0 mm | 5 | |
| Dec. 15 | Sunny | 23° /10° | 0 mm | 6 | |
| Dec. 16 | Sunny | 24° /11° | 0 mm | 6 | |
| Dec. 17 |  Partly cloudy | 24° /11° | 0 mm | 6 | |
| Dec. 18 | Sunny | 24° /13° | 0 mm | 6 | |
| Dec. 19 | Overcast | 22° /12° | 2.5 mm | 5 | |
| Dec. 20 |  Light rain shower | 21° /11° | 2.9 mm | 5 | |
| Dec. 21 |  Patchy light rain with thunder | 20° /11° | 2 mm | 4 | |
| Dec. 22 | Overcast | 19° /10° | 0.9 mm | 3 | |
| Dec. 23 | Partly cloudy | 19° /10° | 0 mm | 4 | |
| Dec. 24 | Partly cloudy | 18° /10° | 28.1 mm | 4 | |
| Dec. 25 | Sunny | 19° /9° | 1 mm | 4 | |
| Dec. 26 | Cloudy | 18° /10° | 6.9 mm | 4 | |
| Dec. 27 | Patchy rain possible | 16° /9° | 1.4 mm | 3 | |
| Dec. 28 | Overcast | 17° /7° | 0.6 mm | 4 | |
| Dec. 29 | Patchy rain possible | 16° /8° | 0 mm | 3 | |
| Dec. 30 | Patchy rain possible | 14° /8° | 3.6 mm | 3 | |
| Dec. 31 | Overcast | 15° /10° | 5 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.
Change Month
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 9 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 9 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 ☀️
Quick links
More Riverside weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.