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
December, marked by an average high-temperature of 55.2°F (12.9°C) and a low-temperature of 41.2°F (5.1°C), is the coldest month.Humidity
In August, the average relative humidity in December is 71%.Rainfall
In August, California, in December, during 9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In August, during the entire year, the rain falls for 64.2 days and collects up to 11.34" (288mm) of precipitation.Snowfall
The only month with snowfall in August is December. December has the most snowfall days of the year in August. Snow falls for 0.1 days.Daylight
The month with the shortest days in August, California, is December, with an average of 9h and 36min of daylight.On the first day of December in August, sunrise is at 7:02 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:55 pm PST.
Sunshine
With an average of 5.9h of sunshine, December has the least sunshine of the year in August, California.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 reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What are the coldest months in August?
What is the temperature in December in August?
What is the average humidity in December in August?
How many days does it rain in December in August?
When does it snow the most in August?
When does it start snowing in August?
What is the month with the shortest days in August?
How many hours of daylight does August have in December?
When are sunrise and sunset in December in August?
What is the month with the least sunshine in August?
How many hours of sunshine does August have in December?
What is the month with the lowest UV index in August?
What is the UV index intensity in December in August?
Average temperature in December
August, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 41.2°F
The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (41.2°F).
Average pressure in December
August, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
August, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in December
August, CA
- Average humidity in December: 71%
The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is July (44%).
Average rainfall in December
August, CA
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is February (2.13").
The driest month (with the least rainfall) is August (0").
Average rainfall days in December
August, CA
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is March (12 days).
The month with the least rainy days is August (0.7 days).
Average snowfall days in December
August, 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
August, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
August, CA
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (17.8 days).
Average UV index in December
August, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
August, CA
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
August, 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).
August, California, USA
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