December weather forecast
Rio, GA

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Weather in December

December, the first month of the winter in Rio, is also a fresh month, with an average temperature ranging between min 40.5°F (4.7°C) and max 55.2°F (12.9°C).

Temperature

December heralds a minor drop in average high-temperature, sliding from November's refreshing 62.1°F (16.7°C) to a fresh 55.2°F (12.9°C). In December, Rio's temperature tends to fall to an average low of 40.5°F (4.7°C) during the night.

Humidity

With an average relative humidity of 78%, December is the most humid month.

Rainfall

In Rio, in December, it is raining for 13.4 days, with typically 4.06" (103mm) of accumulated precipitation. Throughout the year, there are 179.6 rainfall days, and 39.84" (1012mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Rio, during December, snow falls for 0.5 days and regularly aggregates up to 0.08" (2mm) of snow. In Rio, during the entire year, snow falls for 2.7 days and aggregates up to 0.94" (24mm) of snow.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 7:23 am and sunset at 5:30 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:40 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.1h of sunshine.

UV index

January, February and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. To protect against the Sun's most potent rays, avoid direct exposure around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Rio in December?

In Rio, in December, the average high-temperature is 55.2°F (12.9°C), and the average low-temperature is 40.5°F (4.7°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in September is estimated at 91.4°F (33°C).

What is the most humid month in Rio?

With an average relative humidity of 78%, December is the most humid month.

What is the average humidity in December?

The average relative humidity in December is 78%.

How many days does it rain in December?

In Rio, Georgia, during December, the rain falls for 13.4 days and regularly aggregates up to 4.06" (103mm) of precipitation.

How much does it snow in December?

In Rio, during December, snow falls for 0.5 days and regularly aggregates up to 0.08" (2mm) of snow.

What is the month with the shortest days?

With an average of 10h and 0min of daylight, December has the shortest days of the year.

How many hours of daylight does Rio have in December?

The average day length in December is 9h and 59min.

When are sunrise and sunset in December in Rio?

On the first day of December, sunrise is at 7:23 am and sunset at 5:30 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:40 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.1h of sunshine.

How long on average sun shines in December?

In Rio, the average sunshine duration in December is 5.1h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February and December, with an average maximum UV index of 3.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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
Rio, GA

Average temperature in December - Rio, GA
  • Average high temperature in December: 55.2°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (52.2°F).

  • Average low temperature in December: 40.5°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).

Average pressure in December
Rio, GA

Average pressure in December - Rio, GA
  • Average pressure in December: 30.15"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in December
Rio, GA

Average wind speed in December - Rio, GA
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

Average humidity in December
Rio, GA

Average humidity in December - Rio, GA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are October and November (72%).

Average rainfall in December
Rio, GA

Average rainfall in December - Rio, GA
  • Average rainfall in December: 4.06"

The wettest month (with the highest rainfall) is August (4.61").
The driest month (with the least rainfall) is October (2.09").

Average rainfall days in December
Rio, GA

Average rainfall days in December - Rio, GA
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is October (9.3 days).

Average snowfall in December
Rio, GA

Average snowfall in December - Rio, GA
  • Average snowfall in December: 0.08"

The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Rio, GA

Average snowfall days in December - Rio, GA
  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Rio, GA

Average daylight in December / Average sunshine in December - Rio, GA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in December
Rio, GA

Average sunshine days in December - Rio, GA
  • Average sunshine days in December: 16.4 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (7.4 days).

Average UV index in December
Rio, GA

Average UV index in December - Rio, GA
  • Average UV index in December: 3

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

Average cloud cover in December
Rio, GA

Average cloud cover in December - Rio, GA
  • Average cloud cover in December: 45

The month with the most cloud cover is December (Cloud cover 45).
The months with the least cloud cover are June, September and October (Cloud cover 31).

Average visibility in December
Rio, GA

Average visibility in December - Rio, GA
  • 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).

Rio, Georgia, USA

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