December weather forecastFairmont, CA
December
Weather in December
The first month of the winter, December, is still a cool month in Fairmont, California, with an average temperature varying between 54.7°F (12.6°C) and 38.3°F (3.5°C).Temperature
Fairmont's December weather, marked by an average high temperature of 54.7°F (12.6°C) and an average low temperature of 38.3°F (3.5°C), is the coldest in the year.Humidity
In Fairmont, the average relative humidity in December is 54%.Rainfall
December is the month with the most rainfall. Rain falls for 5.8 days and accumulates 1.57" (40mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. December is the month with the most snowfall. Snow falls for 2.4 days and accumulates 5.31" (135mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:43 am and sunset at 4:42 pm. On the last day of December, in Fairmont, sunrise is at 7:00 am and sunset at 4:53 pm PST.
Sunshine
In Fairmont, the average sunshine in December is 7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 3 during December leads to these advisories:
Adopt protective measures - It is advised to guard against sun damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fairmont, CA
- Average high temperature in December: 54.7°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is August (62.1°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in December
Fairmont, CA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Fairmont, CA
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest months (with the lowest average wind speed) are August and September (5.3mph).
Average humidity in December
Fairmont, CA
- Average humidity in December: 54%
The months with the highest relative humidity are February and March (56%).
The month with the lowest relative humidity is August (35%).
Average rainfall in December
Fairmont, CA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Fairmont, CA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is March (7.3 days).
The months with the least rainy days are August and September (1.2 days).
Average snowfall in December
Fairmont, CA
- Average snowfall in December: 5.31"
The month with the highest snowfall is December (5.31").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Fairmont, CA
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Fairmont, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are January and February (Average sunshine: 6h and 48min).
Average sunshine days in December
Fairmont, CA
- Average sunshine days in December: 23.3 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in December
Fairmont, CA
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Fairmont, CA
- Average cloud cover in December: 21
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in December
Fairmont, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
