December weather forecastTwain Harte, CA
December
Weather in December
The first month of the winter, December, is also a fresh month in Twain Harte, California, with temperature in the range of an average high of 50.4°F (10.2°C) and an average low of 34.3°F (1.3°C).Temperature
With average high temperatures of 50.4°F (10.2°C) and lows of 34.3°F (1.3°C), December is the coldest month.Humidity
In Twain Harte, the average relative humidity in December is 65%.Rainfall
In December, the rain falls for 9.7 days. Throughout December, 4.57" (116mm) of precipitation is accumulated. In Twain Harte, California, during the entire year, the rain falls for 77.4 days and collects up to 29.06" (738mm) of precipitation.Snowfall
Months with snowfall in Twain Harte are January through May, November and December. In Twain Harte, California, during December, snow falls for 2.9 days and regularly aggregates up to 3.19" (81mm) of snow. Throughout the year, there are 16.2 snowfall days, and 38.07" (967mm) of snow is accumulated.Daylight
The month with the shortest days in Twain Harte, California, is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:41 pm. On the last day of December, in Twain Harte, sunrise is at 7:16 am and sunset at 4:51 pm PST.
Sunshine
With an average of 6.1h of sunshine, December has the least sunshine of the year in Twain Harte.UV index
In Twain Harte, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Twain Harte, CA
- Average high temperature in December: 50.4°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (50.4°F).
- Average low temperature in December: 34.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in December
Twain Harte, CA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Twain Harte, CA
- Average wind speed in December: 4.9mph
The windiest months (with the highest average wind speed) are February and March (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in December
Twain Harte, CA
- Average humidity in December: 65%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in December
Twain Harte, CA
- Average rainfall in December: 4.57"
The wettest month (with the highest rainfall) is March (5.47").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Twain Harte, CA
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.6 days).
Average snowfall in December
Twain Harte, CA
- Average snowfall in December: 3.19"
The month with the highest snowfall is February (12.87").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Twain Harte, CA
- Average snowfall days in December: 2.9 days
The months with the highest number of snowfall days are February and March (3.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Twain Harte, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 6min
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 6min).
Average sunshine days in December
Twain Harte, CA
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is March (15.6 days).
Average UV index in December
Twain Harte, 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 February and November (UV index 2).
Average cloud cover in December
Twain Harte, CA
- Average cloud cover in December: 31
The month with the most cloud cover is March (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Twain Harte, 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).
