December weather forecast
Wyoming, IL

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Weather in December

The first month of the winter, December, is still a cold month in Wyoming, Illinois, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 35.8°F (2.1°C).

Temperature

Wyoming's progression into December includes a drop in the average high-temperature, from a chilly 47.5°F (8.6°C) in November to a wintry 35.8°F (2.1°C). In December, Wyoming reports a consistent average low-temperature of 25°F (-3.9°C) during the nights.

Humidity

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

Rainfall

In December, the rain falls for 5.4 days. Throughout December, 0.63" (16mm) of precipitation is accumulated. In Wyoming, during the entire year, the rain falls for 116.8 days and collects up to 13.98" (355mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Wyoming, in December, during 5.8 snowfall days, 0.83" (21mm) of snow is typically accumulated. In Wyoming, during the entire year, snow falls for 26.8 days and aggregates up to 6.26" (159mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:05 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:40 pm CST.

Sunshine

The average sunshine in December is 4.3h.

UV index

The months with the lowest UV index in Wyoming are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 1 in December interprets into the following advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Enhance your sun protection with tightly woven, yet airy clothing. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

How cold is December in Wyoming?

The high-temperature in Wyoming during December is 35.8°F (2.1°C) and the low-temperature is 25°F (-3.9°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is evaluated at 87.8°F (31°C).

What is the average humidity in December in Wyoming?

In December, the average relative humidity is 81%.

How many days does it rain in December in Wyoming?

In Wyoming, in December, during 5.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

How many days does it snow in December in Wyoming?

In December, in Wyoming, it is snowing for 5.8 days. Throughout December, 0.83" (21mm) of snow is accumulated.

What is the month with the shortest days in Wyoming?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Wyoming have in December?

In December, the average day length in Wyoming is 9h and 17min.

When is the sunrise / sunset in December in Wyoming?

On the first day of December in Wyoming, sunrise is at 7:05 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:40 pm CST.

How long on average sun shines in December in Wyoming?

The average sunshine duration in December in Wyoming is 4.3h.

What is the month with the lowest UV index in Wyoming?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

What is the UV index reading in December in Wyoming?

The average daily maximum UV index in December in Wyoming, Illinois, is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Wyoming, IL

Average temperature in December - Wyoming, IL
  • Average high temperature in December: 35.8°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in December
Wyoming, IL

Average pressure in December - Wyoming, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Wyoming, IL

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

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in December
Wyoming, IL

Average humidity in December - Wyoming, 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%).

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Average rainfall in December
Wyoming, IL

Average rainfall in December - Wyoming, IL
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in December
Wyoming, IL

Average rainfall days in December - Wyoming, IL
  • Average rainfall days in December: 5.4 days

The month with the highest number of rainy days is May (15.2 days).
The months with the least rainy days are January and February (4.2 days).

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Average snowfall in December
Wyoming, IL

Average snowfall in December - Wyoming, IL
  • Average snowfall in December: 0.83"

The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Wyoming, IL

Average snowfall days in December - Wyoming, IL
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Wyoming, IL

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in December
Wyoming, IL

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

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (12.8 days).

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Average UV index in December
Wyoming, IL

Average UV index in December - Wyoming, IL
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Wyoming, IL

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

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in December
Wyoming, IL

Average visibility in December - Wyoming, 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).

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Wyoming, Illinois, USA

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