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 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 Alpine's coldest month, registering average high temperatures of 61.3°F (16.3°C) and lows of 44.6°F (7°C).Humidity
The average relative humidity in December is 57%.Rainfall
In Alpine, during December, the rain falls for 5.5 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 62 rainfall days, and 6.38" (162mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 6:32 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 4:51 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 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: In December, a daily maximum UV index of 3 leads to the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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 temperature in December?
What is the average humidity in December?
How many days does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Alpine have 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 intensity in December?
Average temperature in December
Alpine, CA
- Average high temperature in December: 61.3°F
The warmest month (with the highest average high temperature) is August (87.3°F).
The month with the lowest average high temperature is December (61.3°F).
- Average low temperature in December: 44.6°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (44.2°F).
Average pressure in December
Alpine, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Alpine, CA
- Average wind speed in December: 5.1mph
The windiest month (with the highest average wind speed) is May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.1mph).
Average humidity in December
Alpine, CA
- Average humidity in December: 57%
The month with the highest relative humidity is May (62%).
The month with the lowest relative humidity is November (51%).
Average rainfall in December
Alpine, CA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is February (0.94").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Alpine, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (1.5 days).
Average daylight in December /
Average sunshine in December
Alpine, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Alpine, CA
- Average sunshine days in December: 24 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is July (19.4 days).
Average UV index in December
Alpine, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Alpine, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Alpine, 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).
Alpine, California, USA
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