December weather forecastBloomington, CA
December
Weather in December
The first month of the winter, December, is still a refreshing month in Bloomington, California, with an average temperature fluctuating between 44.2°F (6.8°C) and 60.8°F (16°C).Temperature
Bloomington's December weather, marked by an average high temperature of 60.8°F (16°C) and an average low temperature of 44.2°F (6.8°C), is the coldest in the year.Humidity
The average relative humidity in December is 51%.Rainfall
In Bloomington, California, in December, it is raining for 5.9 days, with typically 1.5" (38mm) of accumulated precipitation. In Bloomington, California, during the entire year, the rain falls for 48.1 days and collects up to 6.89" (175mm) of precipitation.Snowfall
January, March through December are months without snowfall in Bloomington.Daylight
The month with the shortest days in Bloomington is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:37 am and sunset at 4:40 pm. On the last day of December, in Bloomington, sunrise is at 6:55 am and sunset at 4:50 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.9h of sunshine.UV index
The month with the lowest UV index in Bloomington is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bloomington, CA
- Average high temperature in December: 60.8°F
The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).
- Average low temperature in December: 44.2°F
The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).
Average pressure in December
Bloomington, 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 (29.85"Hg).
Average wind speed in December
Bloomington, CA
- Average wind speed in December: 5.3mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in December
Bloomington, CA
- Average humidity in December: 51%
The months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Bloomington, CA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Bloomington, CA
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in December
Bloomington, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 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
Bloomington, CA
- Average daylight in December: 9h and 54min
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: 6h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Bloomington, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in December
Bloomington, 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
Bloomington, CA
- Average cloud cover in December: 21
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in December
Bloomington, 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).
