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United StatesThe weather in December in Fairfax
It's cool in December in Fairfax with an average temperature of 14°C. Temperatures this month range from a low of 12°C to a high of 16°C. At night, you can expect temperatures between 3°C and 8°C.
Looking for sun? December isn’t a good month to be in Fairfax. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Fairfax, 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 26°C in 2020, Fairfax reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 6°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 14°C.
Rainfall amount
In December, there is an average of 110 mm of precipitation, spread over 14 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in December for Fairfax
Click on any day in December to get detailed info about the usual weather on that day in Fairfax. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Fairfax | New York | |
|---|---|---|
| Average temperature | 14°C | 9°C |
| Max. temperature | 16°C | 12°C |
| Min. temperature | 3°C | -5°C |
| Total precipitation | 110 mm | 133 mm |
| Rainy days | 14 days | 17 days |
Start of December
The month of December starts in Fairfax with cool temps, averaging around 16°C during the day and nights around 7°C.
Mid December
By mid-December, daytime temps drop to around 14°C, with nights around 6°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of December
By the end of December, the average daytime temperature in Fairfax is around 14°C, while nighttime temps are about 5°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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 Fairfax for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in December in Fairfax, California. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Fairfax
Temperature in December in Fairfax over the years
Precipitation charts
These charts show the average amount of precipitation in December in Fairfax, 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 Fairfax
Total precipitation in December in Fairfax over the years
Daily UV index in December in Fairfax
This chart shows the average daily UV index in December in Fairfax, 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 Fairfax
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Average weather in Fairfax by month
Click on a month below to see detailed weather info for Fairfax. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.