Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Fairfax experiences its lowest average temperatures in December, reaching a peak of 55.2°F (12.9°C) and a minimum of 46°F (7.8°C).Humidity
The average relative humidity in December is 73%.Rainfall
In Fairfax, California, during December, the rain falls for 10.9 days and regularly aggregates up to 2.83" (72mm) of precipitation. In Fairfax, during the entire year, the rain falls for 80.3 days and collects up to 15.98" (406mm) of precipitation.Snowfall
The only month with snowfall is December. The month with the most snowfall days is December, when snow falls for 0.1 days.Daylight
The month with the shortest days in Fairfax is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:01 pm PST.
Sunshine
December has the least sunshine of the year in Fairfax, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 3 in December translates into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What are the coldest months in Fairfax?
What are the temperatures in Fairfax in December?
What is the average humidity in December in Fairfax?
How many days does it rain in December in Fairfax?
What is the snowiest month in Fairfax?
When does it start to snow in Fairfax?
What is the month with the shortest days in Fairfax?
How many hours of daylight does Fairfax have in December?
What time are sunrise and sunset in December in Fairfax?
What is the month with the least sunshine in Fairfax?
How many hours of sunshine does Fairfax have in December?
What is the month with the lowest UV index in Fairfax?
What is the UV index reading in December in Fairfax?
Average temperature in December
Fairfax, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 46°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).
Average pressure in December
Fairfax, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Fairfax, CA
- Average wind speed in December: 6.7mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).
Average humidity in December
Fairfax, CA
- Average humidity in December: 73%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in December
Fairfax, CA
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
Fairfax, CA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall days in December
Fairfax, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Fairfax, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Fairfax, CA
- Average sunshine days in December: 18.7 days
The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in December
Fairfax, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in December
Fairfax, CA
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in December
Fairfax, 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).
Fairfax, California, USA
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