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
In Alturas, December is the coldest month, with temperatures averaging a high of 36.1°F (2.3°C) and a low of 23°F (-5°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 79%.Rainfall
In Alturas, during December, the rain falls for 8.4 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Alturas, during the entire year, the rain falls for 91.1 days and collects up to 12.64" (321mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. The month with the most snowfall is December, when snow falls for 12.8 days and typically aggregates up to 9.02" (229mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:09 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:42 pm PST.
Sunshine
January and December, with an average of 5.4h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days in Alturas?
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 Alturas have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Alturas, CA
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (52.5°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in December
Alturas, CA
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Alturas, CA
- Average wind speed in December: 7.2mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Alturas, CA
- Average humidity in December: 79%
The months with the highest relative humidity are January and December (79%).
The month with the lowest relative humidity is August (34%).
Average rainfall in December
Alturas, CA
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Alturas, CA
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (2.5 days).
Average snowfall in December
Alturas, CA
- Average snowfall in December: 9.02"
The month with the highest snowfall is December (9.02").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Alturas, CA
- Average snowfall days in December: 12.8 days
The month with the highest number of snowfall days is December (12.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Alturas, CA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in December
Alturas, CA
- Average sunshine days in December: 14.2 days
The months with the most sunshine days are July and August (26.3 days).
The month with the least sunshine days is March (12.8 days).
Average UV index in December
Alturas, CA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Alturas, CA
- Average cloud cover in December: 44
The months with the most cloud cover are March and December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in December
Alturas, CA
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Alturas, California, USA
Weather forecast for your location
2. Allow the app to use your location