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
December, with average temperatures reaching a high of 51.4°F (10.8°C) and a low of 35.1°F (1.7°C), is the coldest month.Humidity
In Standard, the average relative humidity in December is 65%.Rainfall
In December, the rain falls for 9.6 days. Throughout December, 4.33" (110mm) of precipitation is accumulated. In Standard, during the entire year, the rain falls for 79.1 days and collects up to 27.32" (694mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Standard, during December, snow falls for 1.4 days and regularly aggregates up to 1.14" (29mm) of snow. Throughout the year, there are 9.6 snowfall days, and 20.67" (525mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.1h of sunshine.UV index
In Standard, California, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 during December leads to these advisories:
Take precautions - Protection against sunburn is recommended. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What is the usual temperature for Standard in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Standard have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Standard, CA
- Average high temperature in December: 51.4°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (51.4°F).
- Average low temperature in December: 35.1°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (35.1°F).
Average pressure in December
Standard, 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
Standard, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is February (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in December
Standard, 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
Standard, CA
- Average rainfall in December: 4.33"
The wettest month (with the highest rainfall) is March (5.31").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Standard, CA
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is March (14 days).
The month with the least rainy days is August (1.2 days).
Average snowfall in December
Standard, CA
- Average snowfall in December: 1.14"
The month with the highest snowfall is February (8.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Standard, CA
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Standard, CA
- Average daylight in December: 9h and 4min
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 1min
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 6min).
Average sunshine days in December
Standard, CA
- Average sunshine days in December: 19.8 days
The months with the most sunshine days are July and August (28.8 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in December
Standard, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in December
Standard, CA
- Average cloud cover in December: 30
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Standard, 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).
Standard, California, USA
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