December weather forecast
Rocky Hill, TN

Share

Weather in December

December, the first month of the winter in Rocky Hill, is also a frosty month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 49.5°F (9.7°C).

Temperature

December indicates a minor shift in the average high-temperature, from November's mild 57.2°F (14°C) to a chilly 49.5°F (9.7°C). During December, the average low-temperature is recorded at a cold 35.2°F (1.8°C).

Humidity

December is the most humid month in Rocky Hill, with an average relative humidity of 79%.

Rainfall

In Rocky Hill, in December, during 11.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, in Rocky Hill, there are 148.2 rainfall days, and 18.23" (463mm) of precipitation is accumulated.

Snowfall

January through March, October through December are months with snowfall in Rocky Hill, Tennessee. In December, it is snowing for 3.6 days. Throughout December, 0.63" (16mm) of snow is accumulated. Throughout the year, there are 18.9 snowfall days, and 3.58" (91mm) of snow is accumulated.

Daylight

The month with the shortest days in Rocky Hill is December, with an average of 9h and 48min of daylight.
On the first day of December, sunrise is at 7:28 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:32 pm EST.

Sunshine

In December, the average sunshine in Rocky Hill is 5.2h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. During bright days, sunglasses that offer UVA and UVB defense are recommended. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
[Resources]

Frequently asked questions

What is the temperature in December in Rocky Hill?

The high-temperature in Rocky Hill during December is 49.5°F (9.7°C) and the low-temperature is 35.2°F (1.8°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 86°F (30°C).

What is the most humid month in Rocky Hill?

December is the most humid month in Rocky Hill, with an average relative humidity of 79%.

What is the average humidity in December in Rocky Hill?

In December, the average relative humidity in Rocky Hill, Tennessee, is 79%.

How much does it rain in Rocky Hill in December?

In Rocky Hill, in December, it is raining for 11.1 days, with typically 1.54" (39mm) of accumulated precipitation.

How many days does it snow in December in Rocky Hill?

In December, it is snowing for 3.6 days. Throughout December, 0.63" (16mm) of snow is accumulated.

What is the month with the shortest days in Rocky Hill?

December has the shortest days of the year in Rocky Hill, Tennessee, with an average of 9h and 48min of daylight.

What is the average length of the day in December in Rocky Hill?

The average day length in December is 9h and 46min.

What time are sunrise and sunset in December in Rocky Hill?

In December, on the first day of the month, sunrise is at 7:28 am and sunset at 5:22 pm. On the last day of the month, in Rocky Hill, sunrise is at 7:46 am and sunset at 5:32 pm EST.

How long on average sun shines in December in Rocky Hill?

In Rocky Hill, Tennessee, the average sunshine duration in December is 5.2h.

What is the month with the lowest UV index in Rocky Hill?

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.

What is the UV index reading in December in Rocky Hill?

In Rocky Hill, Tennessee, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Rocky Hill, TN

Average temperature in December - Rocky Hill, TN
  • Average high temperature in December: 49.5°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 (44.8°F).

  • Average low temperature in December: 35.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

[Resources]

Average pressure in December
Rocky Hill, TN

Average pressure in December - Rocky Hill, 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).

[Resources]

Average wind speed in December
Rocky Hill, TN

Average wind speed in December - Rocky Hill, TN
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

[Resources]

Average humidity in December
Rocky Hill, TN

Average humidity in December - Rocky Hill, TN
  • Average humidity in December: 79%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).

[Resources]

Average rainfall in December
Rocky Hill, TN

Average rainfall in December - Rocky Hill, TN
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is July (2.2").
The driest month (with the least rainfall) is September (0.94").

[Resources]

Average rainfall days in December
Rocky Hill, TN

Average rainfall days in December - Rocky Hill, TN
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (8.7 days).

[Resources]

Average snowfall in December
Rocky Hill, TN

Average snowfall in December - Rocky Hill, TN
  • Average snowfall in December: 0.63"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").

[Resources]

Average snowfall days in December
Rocky Hill, TN

Average snowfall days in December - Rocky Hill, TN
  • Average snowfall days in December: 3.6 days

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Rocky Hill, TN

Average daylight in December / Average sunshine in December - Rocky Hill, TN
  • Average daylight in December: 9h and 5min

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 48min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

[Resources]

Average sunshine days in December
Rocky Hill, TN

Average sunshine days in December - Rocky Hill, TN
  • Average sunshine days in December: 17 days

The month with the most sunshine days is November (19.3 days).
The months with the least sunshine days are February and July (12.5 days).

[Resources]

Average UV index in December
Rocky Hill, TN

Average UV index in December - Rocky Hill, 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).

[Resources]

Average cloud cover in December
Rocky Hill, TN

Average cloud cover in December - Rocky Hill, TN
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).

[Resources]

Average visibility in December
Rocky Hill, TN

Average visibility in December - Rocky Hill, TN
  • Average visibility in December: 6mi

The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).

[Resources]

Rocky Hill, Tennessee, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location