December weather forecastDecatur, TX
December
Weather in December
December, the first month of the winter in Decatur, is still a cool month, with an average temperature varying between 39.4°F (4.1°C) and 54.3°F (12.4°C).Temperature
The beginning of December marks a decrease in the average high-temperature, transitioning from a refreshing 63.5°F (17.5°C) in November to a fresh 54.3°F (12.4°C). In the month of December, the temperature generally rests at an average low of 39.4°F (4.1°C).Humidity
In Decatur, the average relative humidity in December is 67%.Rainfall
In Decatur, in December, during 7.8 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Decatur, during the entire year, the rain falls for 131.9 days and collects up to 28.31" (719mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.7 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 3.5 snowfall days, and 1.69" (43mm) of snow is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Decatur.On the first day of the month, sunrise is at 7:16 am and sunset at 5:22 pm. On the last day of December, sunrise is at 7:33 am and sunset at 5:33 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.9h of sunshine.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 3 transforms into these recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Decatur, TX
- Average high temperature in December: 54.3°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in December
Decatur, 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 (29.89"Hg).
Average wind speed in December
Decatur, TX
- Average wind speed in December: 8.6mph
The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in December
Decatur, TX
- Average humidity in December: 67%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).
Average rainfall in December
Decatur, TX
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in December
Decatur, TX
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in December
Decatur, TX
- Average snowfall in December: 0.24"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Decatur, TX
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (1.9 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
Decatur, 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 54min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
Decatur, TX
- Average sunshine days in December: 21.2 days
The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in December
Decatur, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Decatur, TX
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
Decatur, 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).
