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
With average high temperatures of 52.3°F (11.3°C) and lows of 38.3°F (3.5°C), December is the coldest month.Humidity
The average relative humidity in December is 69%.Rainfall
In December, the rain falls for 12.2 days. Throughout December, 3.58" (91mm) of precipitation is accumulated. In Cottonwood, during the entire year, the rain falls for 88.3 days and collects up to 21.5" (546mm) of precipitation.Snowfall
Months with snowfall in Cottonwood are February, November and December. December is the last month it regularly snows. During 0.2 snowfall days, in December, Cottonwood aggregates 0.12" (3mm) of snow. In Cottonwood, during the entire year, snow falls for 0.6 days and aggregates up to 0.47" (12mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:13 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:53 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 3 during December translates into these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What is the average December temperature?
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 in Cottonwood?
How many hours of daylight does Cottonwood have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Cottonwood have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Cottonwood, CA
- Average high temperature in December: 52.3°F
The warmest month (with the highest average high temperature) is July (95.2°F).
The month with the lowest average high temperature is December (52.3°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in December
Cottonwood, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in December
Cottonwood, CA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Cottonwood, CA
- Average humidity in December: 69%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is August (31%).
Average rainfall in December
Cottonwood, CA
- Average rainfall in December: 3.58"
The wettest month (with the highest rainfall) is March (4.02").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
Cottonwood, CA
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (1.4 days).
Average snowfall in December
Cottonwood, CA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are January, March, April, May, June, July, August, September and October (0").
Average snowfall days in December
Cottonwood, CA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cottonwood, CA
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 5h 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: 5h and 42min).
Average sunshine days in December
Cottonwood, CA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is March (14.6 days).
Average UV index in December
Cottonwood, CA
- Average UV index in December: 3
The months with the highest UV index are June and 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
Cottonwood, CA
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Cottonwood, 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).
Cottonwood, California, USA
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