December weather forecast
Georgetown, IL

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Weather in December

The first month of the winter, December, is also an icy month in Georgetown, Illinois, with an average temperature ranging between max 37.6°F (3.1°C) and min 27.5°F (-2.5°C).

Temperature

December's arrival correlates with a reduction in the average high-temperature, down from a frosty 48.9°F (9.4°C) in November to an icy 37.6°F (3.1°C). An average nighttime temperature of 27.5°F (-2.5°C) is noted during the month of December.

Humidity

In Georgetown, the average relative humidity in December is 81%.

Rainfall

In Georgetown, during December, the rain falls for 8.8 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 151.8 rainfall days, and 25.63" (651mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 7.9 days. Throughout December, 2.09" (53mm) of snow is accumulated. Throughout the year, there are 35.2 snowfall days, and 8.82" (224mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 6:53 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:12 am and sunset at 4:35 pm CST.

Sunshine

In Georgetown, the average sunshine in December is 4.5h.

UV index

January, February, November 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 low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Enhance your sun protection with tightly woven, yet airy clothing. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

December temperatures vary between a high-temperature of 37.6°F (3.1°C) and a low-temperature of 27.5°F (-2.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 86°F (30°C).

What is the average humidity in December in Georgetown?

In Georgetown, the average relative humidity in December is 81%.

How much does it rain in December?

In December, in Georgetown, Illinois, the rain falls for 8.8 days. Throughout December, 1.46" (37mm) of precipitation is accumulated.

How much does it snow in December?

In December, it is snowing for 7.9 days. Throughout December, 2.09" (53mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

How many hours of daylight does Georgetown have in December?

In Georgetown, the average day length in December is 9h and 23min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:53 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:35 pm CST.

How long on average sun shines in December?

In Georgetown, the average sunshine duration in December is 4.5h.

When is the lowest UV index?

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

How high is the UV index in December?

In Georgetown, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's 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
Georgetown, IL

Average temperature in December - Georgetown, IL
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in December
Georgetown, IL

Average pressure in December - Georgetown, IL
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Georgetown, IL

Average wind speed in December - Georgetown, IL
  • Average wind speed in December: 9.7mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Georgetown, IL

Average humidity in December - Georgetown, IL
  • Average humidity in December: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Georgetown, IL

Average rainfall in December - Georgetown, IL
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").

Average rainfall days in December
Georgetown, IL

Average rainfall days in December - Georgetown, IL
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).

Average snowfall in December
Georgetown, IL

Average snowfall in December - Georgetown, IL
  • Average snowfall in December: 2.09"

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Georgetown, IL

Average snowfall days in December - Georgetown, IL
  • Average snowfall days in December: 7.9 days

The month with the highest number of snowfall days is January (10.6 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
Georgetown, IL

Average daylight in December / Average sunshine in December - Georgetown, IL
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Georgetown, IL

Average sunshine days in December - Georgetown, IL
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in December
Georgetown, IL

Average UV index in December - Georgetown, IL
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Georgetown, IL

Average cloud cover in December - Georgetown, IL
  • Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).

Average visibility in December
Georgetown, IL

Average visibility in December - Georgetown, IL
  • Average visibility in December: 6mi

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

Georgetown, Illinois, USA

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