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 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
Calimesa notes the coldest temperatures in December, with a high average of 56.3°F (13.5°C) and a low of 40.1°F (4.5°C).Humidity
In Calimesa, the average relative humidity in December is 52%.Rainfall
In Calimesa, in December, during 6.1 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, there are 49.3 rainfall days, and 6.69" (170mm) of precipitation is accumulated.Snowfall
Months with snowfall are February through April, November and December. December is the last month it regularly snows. During 0.3 snowfall days, in December, Calimesa aggregates 0.28" (7mm) of snow. Throughout the year, there are 2.6 snowfall days, and 2.05" (52mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December in Calimesa, sunrise is at 6:36 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:49 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 3 in December translates into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
What is the temperature in December?
What is the average humidity in December?
How many days does it rain in December?
What is the last month it snows?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Calimesa have in December?
What is the month with the lowest UV index?
How high is the UV index in December in Calimesa?
Average temperature in December
Calimesa, CA
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in December
Calimesa, 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 (29.83"Hg).
Average wind speed in December
Calimesa, CA
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is September (5.2mph).
Average humidity in December
Calimesa, CA
- Average humidity in December: 52%
The month with the highest relative humidity is February (54%).
The month with the lowest relative humidity is August (36%).
Average rainfall in December
Calimesa, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Calimesa, CA
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.4 days).
Average snowfall in December
Calimesa, CA
- Average snowfall in December: 0.28"
The month with the highest snowfall is November (0.87").
The months with the least snowfall are January, May, June, July, August, September and October (0").
Average snowfall days in December
Calimesa, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are January, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Calimesa, 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: 6h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Calimesa, CA
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is June (27.6 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in December
Calimesa, CA
- Average UV index in December: 3
The month with the highest UV index is 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
Calimesa, CA
- Average cloud cover in December: 24
The months with the most cloud cover are February, March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Calimesa, 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).
Calimesa, California, USA
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