December weather forecast
River Hills, TN

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Weather in December

The first month of the winter, December, is still a cool month in River Hills, Tennessee, with an average temperature fluctuating between 50.2°F (10.1°C) and 36.1°F (2.3°C).

Temperature

River Hills records a mild change in average high-temperature during December, easing from a refreshing 57.6°F (14.2°C) in November to a cool 50.2°F (10.1°C). Throughout December, River Hills witnesses a consistent average low-temperature of 36.1°F (2.3°C).

Humidity

December is the most humid month, with an average relative humidity of 80%.

Rainfall

The wettest months are February and December, with an average 1.18" (30mm) of rainfall.

Snowfall

Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 2.9 snowfall days, and 0.47" (12mm) of snow is accumulated.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year.
On the first day of December in River Hills, Tennessee, sunrise is at 7:31 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:39 pm EST.

Sunshine

With an average of 5h of sunshine, December has the least sunshine of the year.

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 hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

In River Hills, in December, the average high-temperature is 50.2°F (10.1°C), and the average low-temperature is 36.1°F (2.3°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is estimated at 86°F (30°C).

What is the most humid month?

With an average relative humidity of 80%, December is the most humid month.

What is the average humidity in December?

The average relative humidity in December is 80%.

What is the wettest month?

The months with the most rainfall are February and December, with an average 1.18" (30mm) of precipitation.

How many days does it rain in December?

In River Hills, in December, it is raining for 8.3 days, with typically 1.18" (30mm) of accumulated precipitation.

When does it start snowing?

December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days?

With an average of 9h and 48min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In River Hills, the average day length in December is 9h and 50min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:31 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:39 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5h of sunshine.

How long on average sun shines in December?

In River Hills, the average sunshine duration in December is 5h.

When is the lowest UV index?

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

What is the UV index intensity in December?

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

Average temperature in December
River Hills, TN

Average temperature in December - River Hills, TN
  • Average high temperature in December: 50.2°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 (46°F).

  • Average low temperature in December: 36.1°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).

Average pressure in December
River Hills, TN

Average pressure in December - River Hills, 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 (29.98"Hg).

Average wind speed in December
River Hills, TN

Average wind speed in December - River Hills, TN
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

Average humidity in December
River Hills, TN

Average humidity in December - River Hills, TN
  • Average humidity in December: 80%

The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, October and November (75%).

Average rainfall in December
River Hills, TN

Average rainfall in December - River Hills, TN
  • Average rainfall in December: 1.18"

The wettest months (with the highest rainfall) are February and December (1.18").
The driest month (with the least rainfall) is September (0.43").

Average rainfall days in December
River Hills, TN

Average rainfall days in December - River Hills, TN
  • Average rainfall days in December: 8.3 days

The month with the highest number of rainy days is July (11.7 days).
The month with the least rainy days is October (6.1 days).

Average snowfall in December
River Hills, TN

Average snowfall in December - River Hills, TN
  • Average snowfall in December: 0.04"

The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
River Hills, TN

Average snowfall days in December - River Hills, TN
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
River Hills, TN

Average daylight in December / Average sunshine in December - River Hills, 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: 5h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in December
River Hills, TN

Average sunshine days in December - River Hills, TN
  • Average sunshine days in December: 21.3 days

The month with the most sunshine days is October (23.6 days).
The month with the least sunshine days is July (16.8 days).

Average UV index in December
River Hills, TN

Average UV index in December - River Hills, 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
River Hills, TN

Average cloud cover in December - River Hills, TN
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in December
River Hills, TN

Average visibility in December - River Hills, TN
  • Average visibility in December: 5mi

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

River Hills, Tennessee, USA

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