December weather forecastSouth Alamo, TX
December
Weather in December
The first month of the winter, December, is still a pleasant month in South Alamo, Texas, with an average temperature varying between 56.1°F (13.4°C) and 71.4°F (21.9°C).Temperature
The onset of December brings a small shift in high-temperatures, falling from a warm 77.7°F (25.4°C) in November to a pleasant 71.4°F (21.9°C). During December nights, South Alamo records an average temperature of 56.1°F (13.4°C).Humidity
In December, the average relative humidity is 68%.Rainfall
In South Alamo, during December, the rain falls for 6.3 days and regularly aggregates up to 0.47" (12mm) of precipitation. In South Alamo, during the entire year, the rain falls for 94.1 days and collects up to 9.06" (230mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 5:40 pm. On the last day of December, sunrise is at 7:19 am and sunset at 5:51 pm CST.
Sunshine
With an average of 5.5h of sunshine, December has the least sunshine of the year.UV index
The month with the lowest UV index is December, with an average maximum UV index of 4. 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: In December, the maximum UV index of 4 suggests these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
South Alamo, TX
- Average high temperature in December: 71.4°F
The warmest month (with the highest average high temperature) is August (98.2°F).
The month with the lowest average high temperature is January (69.6°F).
- Average low temperature in December: 56.1°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (53.4°F).
Average pressure in December
South Alamo, TX
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in December
South Alamo, TX
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is May (12.4mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in December
South Alamo, TX
- Average humidity in December: 68%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (59%).
Average rainfall in December
South Alamo, TX
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is September (1.46").
The driest months (with the least rainfall) are January and February (0.31").
Average rainfall days in December
South Alamo, TX
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is September (15.1 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in December
South Alamo, TX
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
South Alamo, TX
- 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
South Alamo, TX
- Average daylight in December: 10h and 30min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
South Alamo, TX
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is September (12.5 days).
Average UV index in December
South Alamo, TX
- Average UV index in December: 4
The months with the highest UV index are July and August (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in December
South Alamo, TX
- Average cloud cover in December: 39
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
South Alamo, 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).
