December weather forecastDecatur, AR
December
Weather in December
The first month of the winter, December, is also a frosty month in Decatur, Arkansas, with an average temperature fluctuating between 32°F (0°C) and 46.6°F (8.1°C).Temperature
December brings a drop in Decatur's average high-temperature, falling from a moderate 57°F (13.9°C) in November to a frosty 46.6°F (8.1°C). Nighttime temperature lowers to an average of 32°F (0°C) in December.Humidity
The average relative humidity in December is 74%.Rainfall
In Decatur, in December, during 8.7 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Decatur, during the entire year, the rain falls for 139.7 days and collects up to 31.02" (788mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Decatur. In Decatur, during December, snow falls for 2.6 days and regularly aggregates up to 0.63" (16mm) of snow. In Decatur, Arkansas, during the entire year, snow falls for 13.9 days and aggregates up to 4.8" (122mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of December in Decatur, sunrise is at 7:11 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:13 pm CST.
Sunshine
January and December, with an average of 5.4h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Decatur, AR
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (44.4°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in December
Decatur, AR
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).
Average wind speed in December
Decatur, AR
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
Decatur, AR
- Average humidity in December: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Decatur, AR
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in December
Decatur, AR
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is May (15.5 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall in December
Decatur, AR
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Decatur, AR
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Decatur, AR
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in December
Decatur, AR
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is December (19.2 days).
The months with the least sunshine days are March and April (13.3 days).
Average UV index in December
Decatur, AR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Decatur, AR
- Average cloud cover in December: 41
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Decatur, AR
- 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).
