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 the coldest month, exhibiting average temperatures of 63.5°F (17.5°C) at the peak and 51.3°F (10.7°C) at the base.Humidity
In Tierrasanta, the average relative humidity in December is 61%.Rainfall
In Tierrasanta, in December, it is raining for 5.7 days, with typically 1.3" (33mm) of accumulated precipitation. In Tierrasanta, California, during the entire year, the rain falls for 57.9 days and collects up to 7.48" (190mm) of precipitation.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Tierrasanta.On the first day of December, sunrise is at 6:33 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.8h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in December converts into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What time of the year is the coldest in Tierrasanta?
What is the average December temperature in Tierrasanta?
What is the average humidity in December in Tierrasanta?
How much does it rain in Tierrasanta in December?
What is the month with the shortest days in Tierrasanta?
What is the average length of the day in December in Tierrasanta?
When are sunrise and sunset in December in Tierrasanta?
What is the month with the least sunshine in Tierrasanta?
How long on average sun shines in December in Tierrasanta?
What is the month with the lowest UV index in Tierrasanta?
What is the UV index reading in December in Tierrasanta?
Average temperature in December
Tierrasanta, CA
- Average high temperature in December: 63.5°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in December: 51.3°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in December
Tierrasanta, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in December
Tierrasanta, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in December
Tierrasanta, CA
- Average humidity in December: 61%
The months with the highest relative humidity are May and June (71%).
The month with the lowest relative humidity is November (57%).
Average rainfall in December
Tierrasanta, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is February (1.46").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Tierrasanta, CA
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (2.2 days).
Average daylight in December /
Average sunshine in December
Tierrasanta, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Tierrasanta, CA
- Average sunshine days in December: 22.8 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is February (20.2 days).
Average UV index in December
Tierrasanta, CA
- Average UV index in December: 4
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Tierrasanta, 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 8).
Average visibility in December
Tierrasanta, 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).
Tierrasanta, California, USA
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