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
In Fort Rosecrans, the coldest period comes during February and December, when the average high-temperature touches 63°F (17.2°C).Humidity
In Fort Rosecrans, the average relative humidity in December is 63%.Rainfall
December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 1.81" (46mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 6:33 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:53 pm PST.
Sunshine
December has the least sunshine of the year in Fort Rosecrans, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in December interprets into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What are the temperatures in December?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Fort Rosecrans have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Fort Rosecrans have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Fort Rosecrans, CA
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (75.6°F).
The months with the lowest average high temperature are February and December (63°F).
- Average low temperature in December: 53.6°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (53.1°F).
Average pressure in December
Fort Rosecrans, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in December
Fort Rosecrans, CA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).
Average humidity in December
Fort Rosecrans, CA
- Average humidity in December: 63%
The month with the highest relative humidity is June (76%).
The months with the lowest relative humidity are January and November (61%).
Average rainfall in December
Fort Rosecrans, CA
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Fort Rosecrans, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.8 days).
Average daylight in December /
Average sunshine in December
Fort Rosecrans, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Fort Rosecrans, CA
- Average sunshine days in December: 21.8 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in December
Fort Rosecrans, CA
- Average UV index in December: 4
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Fort Rosecrans, CA
- Average cloud cover in December: 24
The months with the most cloud cover are March, May and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in December
Fort Rosecrans, 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).
Fort Rosecrans, California, USA
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