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
The month of December, characterized by an average high of 57.6°F (14.2°C) and a low of 40.3°F (4.6°C), is recognized as the coldest.Humidity
The average relative humidity in December is 63%.Rainfall
In December, the rain falls for 6.8 days. Throughout December, 1.61" (41mm) of precipitation is accumulated. Throughout the year, in Wheatons, California, there are 52.3 rainfall days, and 9.37" (238mm) of precipitation is accumulated.Snowfall
In Wheatons, snow does not fall in January, March through December.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year in Wheatons.On the first day of the month, sunrise is at 6:47 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:05 am and sunset at 4:51 pm PST.
Sunshine
With an average of 6.8h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 3 in December translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Wheatons?
What are December temperatures?
What is the average humidity in December in Wheatons?
How many days does it rain in December?
When it does not snow?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Wheatons have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Wheatons, CA
- Average high temperature in December: 57.6°F
The warmest month (with the highest average high temperature) is July (97.7°F).
The month with the lowest average high temperature is December (57.6°F).
- Average low temperature in December: 40.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is December (40.3°F).
Average pressure in December
Wheatons, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Wheatons, CA
- Average wind speed in December: 3.6mph
The windiest month (with the highest average wind speed) is June (5.2mph).
The calmest month (with the lowest average wind speed) is December (3.6mph).
Average humidity in December
Wheatons, CA
- Average humidity in December: 63%
The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is August (30%).
Average rainfall in December
Wheatons, CA
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is March (1.93").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Wheatons, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (9.3 days).
The month with the least rainy days is August (0.5 days).
Average snowfall days in December
Wheatons, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Wheatons, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Wheatons, CA
- Average sunshine days in December: 23.1 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in December
Wheatons, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in December
Wheatons, CA
- Average cloud cover in December: 22
The month with the most cloud cover is March (Cloud cover 24).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in December
Wheatons, 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).
Wheatons, California, USA
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