December weather forecast
Allenville, IL

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Weather in December

December, the first month of the winter in Allenville, is still a cold month, with temperature in the range of an average high of 38.8°F (3.8°C) and an average low of 28.4°F (-2°C).

Temperature

The arrival of December corresponds with a reduction in the average high-temperature, down from November's frosty 49.8°F (9.9°C) to an icy 38.8°F (3.8°C). During December, the nighttime temperature averages of 28.4°F (-2°C).

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Allenville, in December, during 7.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Allenville, during the entire year, the rain falls for 130.9 days and collects up to 15.43" (392mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 4.5 days. Throughout December, 0.91" (23mm) of snow is accumulated. Throughout the year, there are 21.5 snowfall days, and 4.53" (115mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:56 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:40 pm CST.

Sunshine

In Allenville, the average sunshine in December is 4.6h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Allenville, Illinois. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Opt for tightly woven and loose clothing to enhance protection from the Sun. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jun 27, 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, the average high-temperature and low-temperature are 38.8°F (3.8°C) and 28.4°F (-2°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is evaluated at 87.8°F (31°C).

What is the average humidity in December?

In Allenville, the average relative humidity in December is 79%.

How many days does it rain in December?

In Allenville, in December, it is raining for 7.5 days, with typically 0.87" (22mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 4.5 days. Throughout December, 0.91" (23mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

The average day length in December in Allenville is 9h and 26min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:56 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:40 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.6h.

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.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk 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
Allenville, IL

Average temperature in December - Allenville, IL
  • Average high temperature in December: 38.8°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in December
Allenville, IL

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Allenville, IL

Average wind speed in December - Allenville, IL
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

Average humidity in December
Allenville, IL

Average humidity in December - Allenville, IL
  • Average humidity in December: 79%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Allenville, IL

Average rainfall in December - Allenville, IL
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is June (1.85").
The driest month (with the least rainfall) is February (0.71").

Average rainfall days in December
Allenville, IL

Average rainfall days in December - Allenville, IL
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in December
Allenville, IL

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

The month with the highest snowfall is January (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Allenville, IL

Average snowfall days in December - Allenville, IL
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (6.4 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
Allenville, IL

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
Allenville, IL

Average sunshine days in December - Allenville, IL
  • Average sunshine days in December: 19.8 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in December
Allenville, IL

Average UV index in December - Allenville, 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
Allenville, IL

Average cloud cover in December - Allenville, IL
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in December
Allenville, IL

Average visibility in December - Allenville, 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).

Allenville, Illinois, USA

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