December weather forecast
Mossville, IL

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Weather in December

The first month of the winter, December, is also a wintry month in Mossville, Illinois, with an average temperature ranging between max 36°F (2.2°C) and min 25.7°F (-3.5°C).

Temperature

With December's onset, the average high-temperature recedes from November's frosty 47.5°F (8.6°C) to a wintry 36°F (2.2°C). An average low-temperature of 25.7°F (-3.5°C) is common during the nights of December.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In December, the rain falls for 5.7 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 123.4 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 6.3 days. Throughout December, 0.94" (24mm) of snow is accumulated. In Mossville, during the entire year, snow falls for 27.8 days and aggregates up to 6.46" (164mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:03 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:22 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 are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

An average high-temperature, in December, in Mossville, is 36°F (2.2°C) and the average low-temperature is 25.7°F (-3.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in July is calculated to be 89.6°F (32°C).

What is the average humidity in December?

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

How many days does it rain in December?

In Mossville, in December, during 5.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Mossville, during December, snow falls for 6.3 days and regularly aggregates up to 0.94" (24mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

In Mossville, the average day length in December is 9h and 18min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:40 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.3h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In Mossville, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal hazard to health 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
Mossville, IL

Average temperature in December - Mossville, IL
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in December: 25.7°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 (18.1°F).

Average pressure in December
Mossville, IL

Average pressure in December - Mossville, 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).

Average wind speed in December
Mossville, IL

Average wind speed in December - Mossville, IL
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in December
Mossville, IL

Average humidity in December - Mossville, 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
Mossville, IL

Average rainfall in December - Mossville, IL
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in December
Mossville, IL

Average rainfall days in December - Mossville, IL
  • Average rainfall days in December: 5.7 days

The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (4.5 days).

Average snowfall in December
Mossville, IL

Average snowfall in December - Mossville, IL
  • Average snowfall in December: 0.94"

The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Mossville, IL

Average snowfall days in December - Mossville, IL
  • Average snowfall days in December: 6.3 days

The month with the highest number of snowfall days is January (9.2 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
Mossville, IL

Average daylight in December / Average sunshine in December - Mossville, 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 month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Mossville, IL

Average sunshine days in December - Mossville, IL
  • Average sunshine days in December: 19.9 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (12.4 days).

Average UV index in December
Mossville, IL

Average UV index in December - Mossville, 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).

Average cloud cover in December
Mossville, IL

Average cloud cover in December - Mossville, 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 31).

Average visibility in December
Mossville, IL

Average visibility in December - Mossville, 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).

Mossville, Illinois, USA

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