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
The shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a warm 73.4°F (23°C) to a comfortable 66.4°F (19.1°C). An average low-temperature of 51.1°F (10.6°C) marks the nights throughout December.Humidity
The average relative humidity in December is 71%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, in San Diego, there are 123.7 rainfall days, and 15.24" (387mm) of precipitation is accumulated.Snowfall
January, February and December are months with snowfall. The months with the most snowfall in San Diego are January, February and December, with an average 0.04" (1mm) of accumulated snow.Daylight
With an average of 10h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:07 am and sunset at 5:37 pm. On the last day of December, sunrise is at 7:23 am and sunset at 5:48 pm CST.
Sunshine
The month with the least sunshine in San Diego is December, with an average of 5.1h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 4 during December, leads to the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in San Diego?
What is the average humidity in December in San Diego?
How many days does it rain in December in San Diego?
What is the snowiest month in San Diego?
When does it start snowing in San Diego?
What is the month with the shortest days in San Diego?
What is the average length of the day in December in San Diego?
When is the sunrise / sunset in December in San Diego?
What is the month with the least sunshine in San Diego?
How long on average sun shines in December in San Diego?
What are the months with the lowest UV index in San Diego?
What is the UV index reading in December in San Diego?
Average temperature in December
San Diego, TX
- Average high temperature in December: 66.4°F
The warmest month (with the highest average high temperature) is August (97.9°F).
The month with the lowest average high temperature is January (65.5°F).
- Average low temperature in December: 51.1°F
The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (48.7°F).
Average pressure in December
San Diego, TX
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in December
San Diego, TX
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is May (11.2mph).
The calmest month (with the lowest average wind speed) is September (8.2mph).
Average humidity in December
San Diego, TX
- Average humidity in December: 71%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (62%).
Average rainfall in December
San Diego, TX
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is September (2.52").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in December
San Diego, TX
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is September (17.1 days).
The month with the least rainy days is January (7 days).
Average snowfall in December
San Diego, TX
- Average snowfall in December: 0.04"
The months with the highest snowfall are January, February and December (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
San Diego, TX
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
San Diego, TX
- Average daylight in December: 10h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
San Diego, TX
- Average sunshine days in December: 20 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in December
San Diego, TX
- Average UV index in December: 4
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
San Diego, TX
- Average cloud cover in December: 43
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
San Diego, TX
- 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).
San Diego, Texas, USA
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