December weather forecastFort Smith, AR
December
Weather in December
December dynamically concludes the year with the full force of winter. This month in Fort Smith sees a decrease in daylight hours and colder temperatures cloud over the sky. The holiday season spirit in the city is held strong with activities planned around the chilly weather. The temperature in December dips substantially between 35.4°F (1.9°C) and 50.4°F (10.2°C), characterizing the last month of the year with the winter chill. It is the perfect time of the year to gather by the fireplace, enjoy the holiday cheer, and prepare for the start of a new year.Temperature
The shift from November to December in Fort Smith involves a decrease in the average high-temperature, from a mild 59.9°F (15.5°C) to a fresh 50.4°F (10.2°C). Fort Smith in December anticipates an average nighttime temperature of 35.4°F (1.9°C).Humidity
In Fort Smith, the average relative humidity in December is 75%.Rainfall
In December, the rain falls for 7.9 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. Throughout the year, in Fort Smith, there are 131.9 rainfall days, and 25.51" (648mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 3.9 snowfall days, and 0.79" (20mm) of snow is accumulated.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of December in Fort Smith, sunrise is at 7:08 am and sunset at 5:05 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:15 pm CST.
Sunshine
January and December, with an average of 5.5h of sunshine, are months with the least sunshine in Fort Smith.UV index
With an average maximum UV index of 2, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fort Smith, AR
- Average high temperature in December: 50.4°F
The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in December
Fort Smith, 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 (29.93"Hg).
Average wind speed in December
Fort Smith, AR
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Fort Smith, AR
- Average humidity in December: 75%
The months with the highest relative humidity are March and May (77%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in December
Fort Smith, AR
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in December
Fort Smith, AR
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is April (14 days).
The month with the least rainy days is November (7.6 days).
Average snowfall in December
Fort Smith, AR
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Fort Smith, AR
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (1.7 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
Fort Smith, AR
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in December
Fort Smith, AR
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is April (14.2 days).
Average UV index in December
Fort Smith, AR
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Fort Smith, AR
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Fort Smith, AR
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
