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
A moderate decline in average high-temperatures is noted in December, moving from a moderate 60.6°F (15.9°C) in November to a cool 52.3°F (11.3°C). December nights observe an average temperature dip to an icy 38.3°F (3.5°C).Humidity
The average relative humidity in December is 78%.Rainfall
In December, the rain falls for 11.6 days. Throughout December, 3.46" (88mm) of precipitation is accumulated. In Jefferson, during the entire year, the rain falls for 152.2 days and collects up to 35.59" (904mm) 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 0.6 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 3.8 snowfall days, and 1.38" (35mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:09 pm CST.
Sunshine
The average sunshine in December in Jefferson is 5.3h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 3 during December leads to these instructions:
Heed the precautions - Suggestions to avoid sunburn are made. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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 many days does it rain in December?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Jefferson have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Jefferson have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Jefferson, AR
- Average high temperature in December: 52.3°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (50°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in December
Jefferson, AR
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Jefferson, AR
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are March and April (7.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Jefferson, AR
- Average humidity in December: 78%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Jefferson, AR
- Average rainfall in December: 3.46"
The wettest month (with the highest rainfall) is April (4.41").
The driest month (with the least rainfall) is July (2.28").
Average rainfall days in December
Jefferson, AR
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in December
Jefferson, AR
- Average snowfall in December: 0.08"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Jefferson, AR
- Average snowfall days in December: 0.6 days
The months with the highest number of snowfall days are January and February (1.3 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
Jefferson, AR
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in December
Jefferson, AR
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Jefferson, AR
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Jefferson, AR
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in December
Jefferson, 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).
Jefferson, Arkansas, USA
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