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
South Mountain, Texas, in December undergoes a slight reduction in the average high-temperature, shifting from November's refreshing 65.8°F (18.8°C) to a moderate 57.7°F (14.3°C). Nighttime temperatures in December average to a wintry 42.4°F (5.8°C).Humidity
In December, the average relative humidity is 69%.Rainfall
In South Mountain, during December, the rain falls for 9.1 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, there are 129.1 rainfall days, and 25.71" (653mm) of precipitation is accumulated.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 2.1 snowfall days, and 0.51" (13mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 6min of daylight.On the first day of December, sunrise is at 7:12 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:38 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.5h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the average humidity in December?
How many days does it rain in December in South Mountain?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December in South Mountain?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
South Mountain, TX
- Average high temperature in December: 57.7°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in December: 42.4°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).
Average pressure in December
South Mountain, TX
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
South Mountain, TX
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is March (11mph).
The calmest month (with the lowest average wind speed) is September (7.3mph).
Average humidity in December
South Mountain, TX
- Average humidity in December: 69%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).
Average rainfall in December
South Mountain, TX
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is October (3.86").
The driest month (with the least rainfall) is November (1.18").
Average rainfall days in December
South Mountain, TX
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
South Mountain, TX
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
South Mountain, TX
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
South Mountain, TX
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 5h and 3min
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 30min).
Average sunshine days in December
South Mountain, TX
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in December
South Mountain, TX
- Average UV index in December: 3
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
South Mountain, TX
- Average cloud cover in December: 38
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
South Mountain, 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).
South Mountain, Texas, USA
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