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 is the month when Posey sees the lowest average temperatures, with a high of 48.7°F (9.3°C) and a low of 30.9°F (-0.6°C).Humidity
In Posey, California, the average relative humidity in December is 57%.Rainfall
In Posey, during December, the rain falls for 7.3 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Posey, during the entire year, the rain falls for 61 days and collects up to 11.81" (300mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Posey, in December, during 1.5 snowfall days, 0.71" (18mm) of snow is typically accumulated. In Posey, during the entire year, snow falls for 9.1 days and aggregates up to 9.13" (232mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:46 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:04 am and sunset at 4:51 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What are December temperatures?
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?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Posey, CA
- Average high temperature in December: 48.7°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (48.7°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is December (30.9°F).
Average pressure in December
Posey, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Posey, CA
- Average wind speed in December: 5.6mph
The windiest months (with the highest average wind speed) are May and June (7.3mph).
The calmest months (with the lowest average wind speed) are January and September (5.4mph).
Average humidity in December
Posey, CA
- Average humidity in December: 57%
The month with the highest relative humidity is February (59%).
The month with the lowest relative humidity is August (31%).
Average rainfall in December
Posey, CA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is January (2.48").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Posey, CA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is June (1.3 days).
Average snowfall in December
Posey, CA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Posey, CA
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is February (2.7 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
Posey, CA
- Average daylight in December: 9h and 5min
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 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Posey, CA
- Average sunshine days in December: 22 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (19 days).
Average UV index in December
Posey, CA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Posey, CA
- Average cloud cover in December: 23
The month with the most cloud cover is March (Cloud cover 26).
The months with the least cloud cover are August and September (Cloud cover 5).
Average visibility in December
Posey, 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).
Posey, California, USA
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