December weather forecastSan Andreas, CA
December
Weather in December
December, the first month of the winter in San Andreas, is also a fresh month, with temperature in the range of an average high of 53.6°F (12°C) and an average low of 37.8°F (3.2°C).Temperature
San Andreas records the coldest temperatures in December, averaging a high of 53.6°F (12°C) and a low of 37.8°F (3.2°C).Humidity
In December, the average relative humidity is 68%.Rainfall
In San Andreas, during December, the rain falls for 9.1 days and regularly aggregates up to 2.95" (75mm) of precipitation. In San Andreas, during the entire year, the rain falls for 73.3 days and collects up to 16.42" (417mm) of precipitation.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:01 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:53 pm PST.
Sunshine
The month with the least sunshine in San Andreas is December, with an average of 6h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a regular UV index of 3 translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Andreas, CA
- Average high temperature in December: 53.6°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.6°F).
- Average low temperature in December: 37.8°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (37.8°F).
Average pressure in December
San Andreas, 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
San Andreas, CA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is February (5.6mph).
The calmest months (with the lowest average wind speed) are August and September (4.4mph).
Average humidity in December
San Andreas, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (37%).
Average rainfall in December
San Andreas, CA
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is March (3.39").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
San Andreas, CA
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (1.7 days).
Average daylight in December /
Average sunshine in December
San Andreas, 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 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
San Andreas, CA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (16.9 days).
Average UV index in December
San Andreas, 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 January, February, November and December (UV index 3).
Average cloud cover in December
San Andreas, CA
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
San Andreas, 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).
