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 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, known for its average high temperature of 62.4°F (16.9°C) and an average low temperature of 45.5°F (7.5°C), is the coldest month.Humidity
In December, the average relative humidity is 51%.Rainfall
In Charter Oak, in December, it is raining for 5.7 days, with typically 1.3" (33mm) of accumulated precipitation. In Charter Oak, during the entire year, the rain falls for 45.2 days and collects up to 6.5" (165mm) of precipitation.Daylight
December has the shortest days of the year in Charter Oak, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:39 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:52 pm PST.
Sunshine
The months with the least sunshine in Charter Oak are January, February and December, with an average of 7h of sunshine.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 3 transforms into the following instructions:
Take precautions - Protection against sunburn is recommended. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Charter Oak?
What is the usual temperature for Charter Oak in December?
What is the average humidity in December in Charter Oak?
How many days does it rain in December in Charter Oak?
What is the month with the shortest days in Charter Oak?
How many hours of daylight does Charter Oak have in December?
When are sunrise and sunset in December in Charter Oak?
What is the month with the least sunshine in Charter Oak?
How many hours of sunshine does Charter Oak have in December?
What is the month with the lowest UV index in Charter Oak?
How high is the UV index in December in Charter Oak?
Average temperature in December
Charter Oak, CA
- Average high temperature in December: 62.4°F
The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in December: 45.5°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure in December
Charter Oak, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Charter Oak, CA
- Average wind speed in December: 5.1mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in December
Charter Oak, CA
- Average humidity in December: 51%
The months with the highest relative humidity are March and May (55%).
The months with the lowest relative humidity are August and November (45%).
Average rainfall in December
Charter Oak, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is February (1.46").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Charter Oak, CA
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (1.2 days).
Average daylight in December /
Average sunshine in December
Charter Oak, CA
- Average daylight in December: 9h and 5min
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 months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).
Average sunshine days in December
Charter Oak, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (22 days).
Average UV index in December
Charter Oak, CA
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Charter Oak, CA
- Average cloud cover in December: 21
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Charter Oak, 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).
Charter Oak, California, USA
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