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
December implies a soft temperature shift, with average high-temperatures reducing from November's moderately hot 77.4°F (25.2°C) to an agreeable 71.2°F (21.8°C). In the month of December, the temperature generally rests at an average low of 54.9°F (12.7°C).Humidity
The most humid month is December, with an average relative humidity of 66%.Rainfall
In Sullivan City, in December, it is raining for 6.6 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 98.5 rainfall days, and 12.17" (309mm) of precipitation is accumulated.Snowfall
In Sullivan City, snow does not fall in February through December.Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 5:41 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:53 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.8h of sunshine.UV index
The month with the lowest UV index in Sullivan City is December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 4 during December, leads to the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sullivan City have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Sullivan City have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Sullivan City, TX
- Average high temperature in December: 71.2°F
The warmest month (with the highest average high temperature) is August (99.9°F).
The month with the lowest average high temperature is January (69.8°F).
- Average low temperature in December: 54.9°F
The month with the highest average low temperature is August (80.1°F).
The coldest month (with the lowest average low temperature) is January (53.2°F).
Average pressure in December
Sullivan City, 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
Sullivan City, TX
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is July (13.7mph).
The calmest months (with the lowest average wind speed) are January and December (9.4mph).
Average humidity in December
Sullivan City, TX
- Average humidity in December: 66%
The month with the highest relative humidity is December (66%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Sullivan City, TX
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is September (2.2").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Sullivan City, TX
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is September (15.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in December
Sullivan City, TX
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.04").
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
Sullivan City, 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
Sullivan City, TX
- Average daylight in December: 10h and 3min
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 5min
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 48min).
Average sunshine days in December
Sullivan City, TX
- Average sunshine days in December: 22.1 days
The month with the most sunshine days is August (23.3 days).
The month with the least sunshine days is September (12.9 days).
Average UV index in December
Sullivan City, 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
Sullivan City, TX
- Average cloud cover in December: 36
The month with the most cloud cover is December (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Sullivan City, 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).
Sullivan City, Texas, USA
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