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 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
Glen Avon's December weather, marked by an average high temperature of 63.3°F (17.4°C) and an average low temperature of 45.9°F (7.7°C), is the coldest in the year.Humidity
The average relative humidity in December is 51%.Rainfall
The wettest months are February and December, with an average 1.61" (41mm) of rainfall.Snowfall
In Glen Avon, snow does not fall in January, March through December.Daylight
The month with the shortest days in Glen Avon is December, with an average of 9h and 54min of daylight.On the first day of December in Glen Avon, California, sunrise is at 6:37 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:51 pm PST.
Sunshine
The months with the least sunshine are February and December, with an average of 6.8h of sunshine.UV index
December is the month with the lowest UV index in Glen Avon, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during December leads to these instructions:
Guard yourself - Precautionary measures against sun damage are advocated. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What part of the year is the coldest in Glen Avon?
What are the temperatures in Glen Avon in December?
What is the average humidity in December in Glen Avon?
What is the wettest month in Glen Avon?
How many days does it rain in December in Glen Avon?
When it does not snow in Glen Avon?
What is the month with the shortest days in Glen Avon?
How many hours of daylight does Glen Avon have in December?
When is the sunrise / sunset in December in Glen Avon?
What are the months with the least sunshine in Glen Avon?
How many hours of sunshine does Glen Avon have in December?
What is the month with the lowest UV index in Glen Avon?
What is the UV index reading in December in Glen Avon?
Average temperature in December
Glen Avon, CA
- Average high temperature in December: 63.3°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (63.3°F).
- Average low temperature in December: 45.9°F
The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (45.9°F).
Average pressure in December
Glen Avon, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Glen Avon, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is May (5.6mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in December
Glen Avon, CA
- Average humidity in December: 51%
The month with the highest relative humidity is May (56%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Glen Avon, CA
- Average rainfall in December: 1.61"
The wettest months (with the highest rainfall) are February and December (1.61").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Glen Avon, CA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.1 days).
Average snowfall days in December
Glen Avon, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Glen Avon, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Glen Avon, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in December
Glen Avon, CA
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Glen Avon, CA
- Average cloud cover in December: 22
The months with the most cloud cover are February and March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Glen Avon, 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).
Glen Avon, California, USA
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