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
December, with its average high-temperature of 62.1°F (16.7°C) and an average low-temperature of 45.5°F (7.5°C), holds the record as the coldest month.Humidity
The average relative humidity in December in San Antonio Heights is 51%.Rainfall
In San Antonio Heights, during December, the rain falls for 6.4 days and regularly aggregates up to 1.69" (43mm) of precipitation. In San Antonio Heights, California, during the entire year, the rain falls for 49.6 days and collects up to 7.8" (198mm) of precipitation.Snowfall
In San Antonio Heights, snow does not fall in January, March through December.Daylight
The month with the shortest days in San Antonio Heights is December, with an average of 9h and 54min of daylight.On the first day of December in San Antonio Heights, sunrise is at 6:38 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:51 pm PST.
Sunshine
February and December, with an average of 6.9h of sunshine, are months with the least sunshine.UV index
December is the month with the lowest UV index in San Antonio Heights, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily UV index of 3 turns into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What are the coldest months in San Antonio Heights?
What are December temperatures in San Antonio Heights?
What is the average humidity in December in San Antonio Heights?
How many days does it rain in December in San Antonio Heights?
When it does not snow in San Antonio Heights?
What is the month with the shortest days in San Antonio Heights?
What is the average length of the day in December in San Antonio Heights?
When is the sunrise / sunset in December in San Antonio Heights?
What are the months with the least sunshine in San Antonio Heights?
How long on average sun shines in December in San Antonio Heights?
What is the month with the lowest UV index in San Antonio Heights?
What is the UV index reading in December in San Antonio Heights?
Average temperature in December
San Antonio Heights, CA
- Average high temperature in December: 62.1°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).
- Average low temperature in December: 45.5°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure in December
San Antonio Heights, 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
San Antonio Heights, CA
- Average wind speed in December: 5.2mph
The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in December
San Antonio Heights, CA
- Average humidity in December: 51%
The months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).
Average rainfall in December
San Antonio Heights, CA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
San Antonio Heights, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in December
San Antonio Heights, 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
San Antonio Heights, 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 month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in December
San Antonio Heights, CA
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in December
San Antonio Heights, 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
San Antonio Heights, CA
- Average cloud cover in December: 21
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
San Antonio Heights, 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).
San Antonio Heights, California, USA
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