December weather forecastChester, CA
December
Weather in December
The first month of the winter, December, is also an icy month in Chester, California, with an average temperature ranging between min 24.1°F (-4.4°C) and max 38.3°F (3.5°C).Temperature
Chester's coldest temperatures are experienced in December, with average high temperatures of 38.3°F (3.5°C) and lows of 24.1°F (-4.4°C).Humidity
In Chester, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 8.9 days. Throughout December, 5.2" (132mm) of precipitation is accumulated. In Chester, during the entire year, the rain falls for 98.1 days and collects up to 32.99" (838mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Chester, in December, during 12.2 snowfall days, 25.67" (652mm) of snow is typically accumulated. Throughout the year, there are 66 snowfall days, and 127.72" (3244mm) of snow is accumulated.Daylight
The month with the shortest days in Chester is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:09 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:49 pm PST.
Sunshine
In December, the average sunshine is 5.2h.UV index
In Chester, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Chester, CA
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is December (24.1°F).
Average pressure in December
Chester, CA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Chester, CA
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is March (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Chester, CA
- Average humidity in December: 79%
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is July (42%).
Average rainfall in December
Chester, CA
- Average rainfall in December: 5.2"
The wettest month (with the highest rainfall) is March (5.59").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Chester, CA
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is August (4 days).
Average snowfall in December
Chester, CA
- Average snowfall in December: 25.67"
The month with the highest snowfall is March (27.05").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Chester, CA
- Average snowfall days in December: 12.2 days
The month with the highest number of snowfall days is March (14 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Chester, CA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Chester, CA
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in December
Chester, CA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February and November (UV index 1).
Average cloud cover in December
Chester, CA
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in December
Chester, CA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
