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 advent of December brings a slight shift in average high-temperature, moving from a refreshing 63.1°F (17.3°C) in November to a fresh 54.3°F (12.4°C). Throughout December, the average low-temperature dips to an icy 39.4°F (4.1°C).Humidity
The average relative humidity in December is 79%.Rainfall
In Simms, Texas, during December, the rain falls for 11.4 days and regularly aggregates up to 3.86" (98mm) of precipitation. Throughout the year, there are 153.9 rainfall days, and 39.69" (1008mm) 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 0.5 snowfall days, it receives 0.31" (8mm) of snow. In Simms, during the entire year, snow falls for 3.7 days and aggregates up to 1.57" (40mm) of snow.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 5:10 pm. On the last day of December, sunrise is at 7:21 am and sunset at 5:21 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5h of sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the average humidity in December?
How much does it rain in December?
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 is the sunrise / sunset in December?
What is the month with the least sunshine in Simms?
How many hours of sunshine does Simms have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Simms, TX
- Average high temperature in December: 54.3°F
The warmest month (with the highest average high temperature) is August (94.3°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in December
Simms, TX
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Simms, TX
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Simms, TX
- Average humidity in December: 79%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Simms, TX
- Average rainfall in December: 3.86"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is September (2.36").
Average rainfall days in December
Simms, TX
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is March (15.2 days).
The month with the least rainy days is January (10.3 days).
Average snowfall in December
Simms, TX
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Simms, TX
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Simms, TX
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in December
Simms, TX
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is January (18.5 days).
The month with the least sunshine days is February (13.3 days).
Average UV index in December
Simms, TX
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Simms, TX
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Simms, TX
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Simms, Texas, USA
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