December weather forecastEdison, CA
December
Weather in December
The first month of the winter, December, is still a mild month in Edison, California, with an average temperature fluctuating between 58.1°F (14.5°C) and 40.8°F (4.9°C).Temperature
December, noted for its average high-temperature of 58.1°F (14.5°C) and an average low-temperature of 40.8°F (4.9°C), is considered the coldest month.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 59%.Rainfall
December is the month with the most rainfall. Rain falls for 6.7 days and accumulates 1.26" (32mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 6:46 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 4:53 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 6.7h of sunshine.UV index
January, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 3 in December translates into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. 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. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Edison, CA
- Average high temperature in December: 58.1°F
The warmest month (with the highest average high temperature) is July (96.6°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in December: 40.8°F
The months with the highest average low temperature are July and August (64.9°F).
The coldest month (with the lowest average low temperature) is December (40.8°F).
Average pressure in December
Edison, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Edison, CA
- Average wind speed in December: 4mph
The windiest months (with the highest average wind speed) are May, June and July (5mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).
Average humidity in December
Edison, CA
- Average humidity in December: 59%
The months with the highest relative humidity are February and December (59%).
The month with the lowest relative humidity is August (29%).
Average rainfall in December
Edison, CA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is December (1.26").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Edison, CA
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is March (9.4 days).
The month with the least rainy days is August (0.8 days).
Average snowfall in December
Edison, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Edison, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Edison, CA
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Edison, CA
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is February (20.2 days).
Average UV index in December
Edison, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in December
Edison, CA
- Average cloud cover in December: 24
The month with the most cloud cover is March (Cloud cover 25).
The months with the least cloud cover are August and September (Cloud cover 4).
Average visibility in December
Edison, 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).
