December weather forecastIsom, TN
December
Weather in December
The first month of the winter, December, is also a frosty month in Isom, Tennessee, with an average temperature ranging between min 35.6°F (2°C) and max 49.1°F (9.5°C).Temperature
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a refreshing 56.8°F (13.8°C) in November to a frosty 49.1°F (9.5°C). An average low-temperature of 35.6°F (2°C) is noted in Isom during the month of December.Humidity
March and December, with an average relative humidity of 79%, are the most humid months in Isom.Rainfall
In Isom, Tennessee, in December, during 13.2 rainfall days, 3.27" (83mm) of precipitation is typically accumulated. In Isom, Tennessee, during the entire year, the rain falls for 178.7 days and collects up to 39.21" (996mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Isom, in December, during 2.4 snowfall days, 0.75" (19mm) of snow is typically accumulated. Throughout the year, there are 13.4 snowfall days, and 3.78" (96mm) of snow is accumulated.Daylight
December has the shortest days of the year in Isom, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:40 am and sunset at 4:36 pm. On the last day of December, sunrise is at 6:58 am and sunset at 4:46 pm CST.
Sunshine
February and December, with an average of 4.6h of sunshine, are months with the least sunshine in Isom.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Isom. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Isom, TN
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in December: 35.6°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in December
Isom, 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
Isom, TN
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Isom, TN
- Average humidity in December: 79%
The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Isom, TN
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is July (4.21").
The driest month (with the least rainfall) is September (2.44").
Average rainfall days in December
Isom, TN
- Average rainfall days in December: 13.2 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.5 days).
Average snowfall in December
Isom, TN
- Average snowfall in December: 0.75"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Isom, TN
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is February (4 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
Isom, 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 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Isom, TN
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Isom, 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
Isom, TN
- Average cloud cover in December: 52
The months with the most cloud cover are February and December (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Isom, TN
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).
