United StatesThe weather in December in Riverside
It's pleasantly warm in December in Riverside with an average temperature of 19°C. Temperatures this month range from a low of 16°C to a high of 22°C. At night, you can expect temperatures between 6°C and 10°C.
Looking for great weather? December is a good time to be in Riverside. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Riverside, California. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 31°C in 2021, Riverside reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 9°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 19°C.
Rainfall amount
In December, there is an average of 68 mm of precipitation, spread over 10 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in December for Riverside
Click on any day in December to get detailed info about the usual weather on that day in Riverside. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Riverside | New York | |
|---|---|---|
| Average temperature | 19°C | 9°C |
| Max. temperature | 22°C | 12°C |
| Min. temperature | 6°C | -5°C |
| Total precipitation | 68 mm | 133 mm |
| Rainy days | 10 days | 17 days |
Start of December
The month of December starts in Riverside with mild temps, averaging around 21°C during the day and nights around 10°C.
Mid December
By mid-December, daytime temps drop to around 20°C, with nights around 8°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of December
By the end of December, the average daytime temperature in Riverside is around 18°C, while nighttime temps are about 8°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Riverside for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in December in Riverside, California. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Riverside
Temperature in December in Riverside over the years
Precipitation charts
These charts show the average amount of precipitation in December in Riverside, California. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Riverside
Total precipitation in December in Riverside over the years
Daily UV index in December in Riverside
This chart shows the average daily UV index in December in Riverside, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Riverside
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Average weather in Riverside by month
Click on a month below to see detailed weather info for Riverside. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.