United StatesAverage weather for California 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.
Start of December
The month of December starts in California with cool temps, averaging around 16°C during the day and nights around 6°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid December
By mid-December, daytime temps drop to around 15°C, with nights around 5°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 California is around 13°C, while nighttime temps are about 5°C. A shower might pop up, but overall, the weather will be dry and sunny.
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.
California in December |
New York | ||
|---|---|---|---|
 Average temperature |
14°C | 9°C | |
 Max. temperature |
17°C | 12°C | |
| Min. temperature |
12°C | -5°C | |
 Total precipitation |
48 mm | 133 mm | |
| Rainy days |
6 days | 17 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
With 25°C in 2023, California reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 4°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 14°C.
Check out the climate of California for all months and discover the best travel time
The climate in California is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in California to get the full picture of the climate.
Daily Temperature in December in California
This chart shows the average daily high and low temperatures in December for California, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in California
The chart below shows the average daily precipitation in December for California, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 6 days of precipitation 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 few years.
Total precipitation in December in California over the years
This chart shows the average precipitation in December in California, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in December for California
Click on any day in December to get detailed info about the usual 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
