December weather forecastTwain, CA
December
Weather in December
The first month of the winter, December, is also a wintry month in Twain, California, with an average temperature ranging between min 23.4°F (-4.8°C) and max 39.2°F (4°C).Temperature
December is the coldest month, with the temperature often reaching an average high of 39.2°F (4°C) and an average low of 23.4°F (-4.8°C).Humidity
In December, the average relative humidity in Twain, California, is 78%.Rainfall
The months with the most rainfall in Twain are February and December, with an average 4.06" (103mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Twain. In December, in Twain, it is snowing for 7.8 days. Throughout December, 11.3" (287mm) of snow is accumulated. In Twain, during the entire year, snow falls for 37.7 days and aggregates up to 56.02" (1423mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Twain.On the first day of the month, sunrise is at 7:07 am and sunset at 4:39 pm. On the last day of December, in Twain, sunrise is at 7:26 am and sunset at 4:49 pm PST.
Sunshine
The average sunshine in December is 5.5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Twain, CA
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (39.2°F).
- Average low temperature in December: 23.4°F
The month with the highest average low temperature is July (49.1°F).
The coldest month (with the lowest average low temperature) is December (23.4°F).
Average pressure in December
Twain, CA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Twain, CA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is March (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Twain, CA
- Average humidity in December: 78%
The months with the highest relative humidity are January and March (81%).
The month with the lowest relative humidity is July (41%).
Average rainfall in December
Twain, CA
- Average rainfall in December: 4.06"
The wettest months (with the highest rainfall) are February and December (4.06").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Twain, CA
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.8 days).
Average snowfall in December
Twain, CA
- Average snowfall in December: 11.3"
The month with the highest snowfall is February (13.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Twain, CA
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is March (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Twain, CA
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Twain, CA
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in December
Twain, CA
- Average UV index in December: 2
The month with the highest UV index is 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
Twain, CA
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in December
Twain, CA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
