Temperatures in December
It's cool in December in California with an average temperature of 14°C. Temperatures this month range from a low of 12°C to a high of 17°C. At night, you can expect temperatures between 3°C and 7°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for California in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in California with cool temperatures, averaging around 16°C during the day and nights close to 6°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature drops to around 15°C, with nights close to 5°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of December
By the end of December, the average daytime temperature in California will be around 13°C, with nights close to 5°C. A shower might show up, but overall the weather will be dry and sunny.
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Precipitation in December
In December, there is an average of 48 mm of precipitation, spread over 6 days. The wind speed is around 3 Bft, mostly coming from the South.
The precipitation chance averages 19% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for California. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
California in December |
UK | ||
|---|---|---|---|
 Average Temperature |
14°C | 9°C | |
 High Temp |
17°C | 11°C | |
| Low Temp |
12°C | 8°C | |
 Total Precipitation |
48 mm | 67 mm | |
| Rainy Days |
6 days | 10 days | |
November
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.
Temperature records for California in December
With 25°C, California hit the highest temperature in the last 10 years in December 2023. The lowest daytime temperature in this month was 4°C in 2022. The extreme night temperatures ranged from a low of -3°C to a high of 14°C.
Check out the climate of California for all months and discover the best travel time
The climate of California is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in California for a full picture of the climate.
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Daily Temperature in December in California
This chart shows the average daily temperatures, both day and night, for each day in December in California, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in California
The chart below shows the average daily precipitation in December for California, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 6 days of rain in California.
Daily UV Index in December in California
This chart shows the average daily UV index in December in California, 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.
Temperature in December in California Over the Years
This chart shows the average temperature in December in California, measured in degrees Celsius, over the past years.
Total Precipitation in December in California Over the Years
This chart shows the average precipitation in December in California, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for California
Click on a specific day in December for detailed info on the typical weather on that day in California. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in California
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Average Weather in California by Month
Click on a month below to see detailed weather info for California. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of California for all months at once
