December weather forecastSpeedwell, TN
December
Weather in December
December, the first month of the winter in Speedwell, is also a frosty month, with an average temperature ranging between min 33.1°F (0.6°C) and max 45.9°F (7.7°C).Temperature
December's arrival signals a moderate reduction in the average high-temperature, easing from a fresh 54.3°F (12.4°C) in November to a chilly 45.9°F (7.7°C). During the December nights, an average temperature of 33.1°F (0.6°C) is observed.Humidity
February and December, with an average relative humidity of 81%, are the most humid months in Speedwell.Rainfall
In Speedwell, during December, the rain falls for 14.2 days and regularly aggregates up to 3.54" (90mm) of precipitation. Throughout the year, there are 185.4 rainfall days, and 40.59" (1031mm) of precipitation is accumulated.Snowfall
Months with snowfall in Speedwell are January through April, October through December. In December, it is snowing for 5.8 days. Throughout December, 2.4" (61mm) of snow is accumulated. Throughout the year, there are 30.4 snowfall days, and 12.17" (309mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 7:29 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:30 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Always opt for UVA and UVB-resistant sunglasses on radiant days. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Speedwell, TN
- Average high temperature in December: 45.9°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in December
Speedwell, TN
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Speedwell, TN
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Speedwell, TN
- Average humidity in December: 81%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in December
Speedwell, TN
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is February (4.65").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in December
Speedwell, TN
- Average rainfall days in December: 14.2 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is November (11.2 days).
Average snowfall in December
Speedwell, TN
- Average snowfall in December: 2.4"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Speedwell, TN
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Speedwell, TN
- 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: 4h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Speedwell, TN
- Average sunshine days in December: 13.3 days
The month with the most sunshine days is October (16.2 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Speedwell, TN
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Speedwell, TN
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 57).
The months with the least cloud cover are June and August (Cloud cover 33).
Average visibility in December
Speedwell, TN
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
