December weather forecastSan Antonio, FL
December
Weather in December
The first month of the winter, December, is also an agreeable month in San Antonio, Florida, with an average temperature fluctuating between 55.2°F (12.9°C) and 72.1°F (22.3°C).Temperature
The start of December sees the average high-temperature at an agreeable 72.1°F (22.3°C), showing little difference from November's 75.4°F (24.1°C). San Antonio temperatures generally rest at a low of 55.2°F (12.9°C) during the December nights.Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 9.5 days. Throughout December, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in San Antonio, there are 200.6 rainfall days, and 40.39" (1026mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
The month with the shortest days is December, with an average of 10h and 24min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 5:32 pm. On the last day of December, in San Antonio, sunrise is at 7:21 am and sunset at 5:43 pm EST.
Sunshine
With an average of 6.3h of sunshine, December has the least sunshine of the year.UV index
In December, the average daily maximum UV index in San Antonio is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 5 in December translates into this advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Antonio, FL
- Average high temperature in December: 72.1°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (67.6°F).
- Average low temperature in December: 55.2°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (50.2°F).
Average pressure in December
San Antonio, FL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in December
San Antonio, FL
- Average wind speed in December: 5.8mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in December
San Antonio, FL
- Average humidity in December: 77%
The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is March (72%).
Average rainfall in December
San Antonio, FL
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is August (7.17").
The driest months (with the least rainfall) are February, March and November (1.42").
Average rainfall days in December
San Antonio, FL
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is August (28.8 days).
The month with the least rainy days is December (9.5 days).
Average snowfall days in December
San Antonio, FL
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
San Antonio, FL
- Average daylight in December: 10h and 24min
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: 6h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in December
San Antonio, FL
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is August (0.8 days).
Average UV index in December
San Antonio, FL
- Average UV index in December: 5
The months with the highest UV index are May, June, July and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in December
San Antonio, FL
- Average cloud cover in December: 35
The months with the most cloud cover are February and December (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in December
San Antonio, FL
- 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).
