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
The start of December involves a subtle temperature drop, shifting from a moderate 57.6°F (14.2°C) in November to a chilly 49.3°F (9.6°C). December in Rockvale generally records an average low-temperature of 35.8°F (2.1°C).Humidity
With an average relative humidity of 79%, December is the most humid month.Rainfall
In Rockvale, during December, the rain falls for 9.6 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Rockvale, Tennessee, during the entire year, the rain falls for 123.1 days and collects up to 12.76" (324mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In December, in Rockvale, it is snowing for 1.7 days. Throughout December, 0.2" (5mm) of snow is accumulated. Throughout the year, in Rockvale, there are 10.9 snowfall days, and 0.87" (22mm) of snow is accumulated.Daylight
The month with the shortest days in Rockvale is December, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:38 am and sunset at 4:32 pm. On the last day of December, sunrise is at 6:55 am and sunset at 4:42 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rockvale in December?
What is the most humid month in Rockvale?
What is the average humidity in December in Rockvale?
How many days does it rain in December in Rockvale?
How many days does it snow in December in Rockvale?
What is the month with the shortest days in Rockvale?
How many hours of daylight does Rockvale have in December?
When are sunrise and sunset in December in Rockvale?
How many hours of sunshine does Rockvale have in December?
When is the lowest UV index in Rockvale?
What is the UV index reading in December in Rockvale?
Average temperature in December
Rockvale, TN
- Average high temperature in December: 49.3°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 35.8°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in December
Rockvale, 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
Rockvale, TN
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is February (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in December
Rockvale, TN
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Rockvale, TN
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in December
Rockvale, TN
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in December
Rockvale, TN
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Rockvale, TN
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (3.8 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
Rockvale, TN
- Average daylight in December: 9h and 5min
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 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Rockvale, TN
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Rockvale, 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 and December (UV index 2).
Average cloud cover in December
Rockvale, TN
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Rockvale, TN
- 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).
Rockvale, Tennessee, USA
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