December weather forecast
Edwardsville, IL

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Weather in December

The first month of the winter, December, is also an icy month in Edwardsville, Illinois, with an average temperature fluctuating between 29.8°F (-1.2°C) and 41.4°F (5.2°C).

Temperature

December's onset brings a reduction in the average high-temperature, from a cool 52.2°F (11.2°C) in November to a wintry 41.4°F (5.2°C). An average nighttime temperature of 29.8°F (-1.2°C) is noted during the month of December.

Humidity

In December, the average relative humidity is 77%.

Rainfall

In December, the rain falls for 6.7 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Edwardsville, during the entire year, the rain falls for 138 days and collects up to 23.9" (607mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Edwardsville, in December, snow falls for 3.8 days, with typically accumulated 0.91" (23mm) of snow. Throughout the year, there are 18.6 snowfall days, and 4.53" (115mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 6:59 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:48 pm CST.

Sunshine

The average sunshine in December is 4.8h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In December, in Edwardsville, the average high-temperature is 41.4°F (5.2°C), and the average low-temperature is 29.8°F (-1.2°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is appraised at 93.2°F (34°C).

What is the average humidity in December?

The average relative humidity in December in Edwardsville is 77%.

How much does it rain in December?

In Edwardsville, in December, it is raining for 6.7 days, with typically 1.38" (35mm) of accumulated precipitation.

How many days does it snow in December?

In December, it is snowing for 3.8 days. Throughout December, 0.91" (23mm) of snow is accumulated.

What is the month with the shortest days in Edwardsville?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 30min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:59 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:48 pm CST.

How long on average sun shines in December?

In Edwardsville, the average sunshine duration in December is 4.8h.

What is the month with 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 Edwardsville, Illinois, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low 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
Edwardsville, IL

Average temperature in December - Edwardsville, IL
  • Average high temperature in December: 41.4°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in December: 29.8°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in December
Edwardsville, IL

Average pressure in December - Edwardsville, IL
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Edwardsville, IL

Average wind speed in December - Edwardsville, IL
  • Average wind speed in December: 9mph

The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in December
Edwardsville, IL

Average humidity in December - Edwardsville, IL
  • Average humidity in December: 77%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Edwardsville, IL

Average rainfall in December - Edwardsville, IL
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").

Average rainfall days in December
Edwardsville, IL

Average rainfall days in December - Edwardsville, IL
  • Average rainfall days in December: 6.7 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).

Average snowfall in December
Edwardsville, IL

Average snowfall in December - Edwardsville, IL
  • Average snowfall in December: 0.91"

The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Edwardsville, IL

Average snowfall days in December - Edwardsville, IL
  • Average snowfall days in December: 3.8 days

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

Average daylight in December / Average sunshine in December - Edwardsville, IL
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).

Average sunshine days in December
Edwardsville, IL

Average sunshine days in December - Edwardsville, IL
  • Average sunshine days in December: 20.4 days

The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).

Average UV index in December
Edwardsville, IL

Average UV index in December - Edwardsville, IL
  • 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, November and December (UV index 2).

Average cloud cover in December
Edwardsville, IL

Average cloud cover in December - Edwardsville, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).

Average visibility in December
Edwardsville, IL

Average visibility in December - Edwardsville, IL
  • 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).

Edwardsville, Illinois, USA

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