December weather forecastShelbyville, TN
December
Weather in December
December wraps up the year in Shelbyville, returning the city to winter's fold. The arrival of cold temperatures, reduced daylight, and higher humidity levels signify the onset of winter. Although snow is not as frequent, traces of snowfall can be observed. The mercury level plummets to its lowest for the year, with the highest temperature reaching only 50°F (10°C). As the city adorns itself in festive spirit, the chilly weather marks an apt ending to the weather cycle.Temperature
During the shift to December, Shelbyville records a mild decrease in average high-temperature, moving from a moderate 57.6°F (14.2°C) in November to a fresh 50°F (10°C). Throughout the month of December, Shelbyville reports a steady low-temperature average of 36.3°F (2.4°C).Humidity
With an average relative humidity of 80%, December is the most humid month.Rainfall
In Shelbyville, in December, it is raining for 12.1 days, with typically 3.35" (85mm) of accumulated precipitation. In Shelbyville, during the entire year, the rain falls for 167.2 days and collects up to 38.78" (985mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Shelbyville, during December, snow falls for 2 days and regularly aggregates up to 0.55" (14mm) of snow. In Shelbyville, during the entire year, snow falls for 10.7 days and aggregates up to 2.83" (72mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:37 am and sunset at 4:33 pm. On the last day of December, sunrise is at 6:54 am and sunset at 4:43 pm CST.
Sunshine
In December, the average sunshine is 4.6h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shelbyville, TN
- Average high temperature in December: 50°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in December: 36.3°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in December
Shelbyville, TN
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Shelbyville, TN
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in December
Shelbyville, TN
- Average humidity in December: 80%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Shelbyville, TN
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is February (4.33").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in December
Shelbyville, TN
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in December
Shelbyville, TN
- Average snowfall in December: 0.55"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Shelbyville, TN
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is January (3.1 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
Shelbyville, TN
- 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: 4h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Shelbyville, TN
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in December
Shelbyville, 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 and December (UV index 2).
Average cloud cover in December
Shelbyville, TN
- Average cloud cover in December: 52
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in December
Shelbyville, TN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
