December weather forecast
Hanover, IL

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Weather in December

The first month of the winter, December, is still a cold month in Hanover, Illinois, with temperature in the range of an average high of 32°F (0°C) and an average low of 21.6°F (-5.8°C).

Temperature

In December, the average high-temperature decreases from a chilly 44.8°F (7.1°C) in November to a wintry 32°F (0°C). Throughout the December nights, Hanover encounters a low-temperature of 21.6°F (-5.8°C).

Humidity

In December, the average relative humidity in Hanover, Illinois, is 82%.

Rainfall

In December, in Hanover, Illinois, the rain falls for 6.5 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. In Hanover, during the entire year, the rain falls for 145.6 days and collects up to 28.9" (734mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Hanover, in December, during 8.7 snowfall days, 2.72" (69mm) of snow is typically accumulated. In Hanover, during the entire year, snow falls for 40.1 days and aggregates up to 16.61" (422mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of December in Hanover, sunrise is at 7:11 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:39 pm CST.

Sunshine

In December, the average sunshine in Hanover is 4.2h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 1 in December suggests the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Hanover in December?

During December, Hanover experiences an average high-temperature of 32°F (0°C) and a low-temperature of 21.6°F (-5.8°C).

What is the average humidity in December in Hanover?

The average relative humidity in December is 82%.

How much does it rain in Hanover in December?

In December, in Hanover, Illinois, the rain falls for 6.5 days. Throughout December, 1.5" (38mm) of precipitation is accumulated.

How much does it snow in Hanover in December?

In Hanover, Illinois, in December, snow falls for 8.7 days, with typically accumulated 2.72" (69mm) of snow.

What is the month with the shortest days in Hanover?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Hanover?

In Hanover, Illinois, the average day length in December is 9h and 9min.

What time are sunrise and sunset in December in Hanover?

On the first day of December in Hanover, sunrise is at 7:11 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:39 pm CST.

How long on average sun shines in December in Hanover?

In Hanover, the average sunshine duration in December is 4.2h.

What are the months with the lowest UV index in Hanover?

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

What is the UV index intensity in December in Hanover?

In Hanover, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Hanover, IL

Average temperature in December - Hanover, IL
  • Average high temperature in December: 32°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in December: 21.6°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

Average pressure in December
Hanover, IL

Average pressure in December - Hanover, IL
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Hanover, IL

Average wind speed in December - Hanover, IL
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in December
Hanover, IL

Average humidity in December - Hanover, IL
  • Average humidity in December: 82%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).

Average rainfall in December
Hanover, IL

Average rainfall in December - Hanover, IL
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.22").

Average rainfall days in December
Hanover, IL

Average rainfall days in December - Hanover, IL
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is February (4.5 days).

Average snowfall in December
Hanover, IL

Average snowfall in December - Hanover, IL
  • Average snowfall in December: 2.72"

The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Hanover, IL

Average snowfall days in December - Hanover, IL
  • Average snowfall days in December: 8.7 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
Hanover, IL

Average daylight in December / Average sunshine in December - Hanover, IL
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in December
Hanover, IL

Average sunshine days in December - Hanover, IL
  • Average sunshine days in December: 17.1 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.5 days).

Average UV index in December
Hanover, IL

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

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

Average cloud cover in December
Hanover, IL

Average cloud cover in December - Hanover, IL
  • Average cloud cover in December: 57

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).

Average visibility in December
Hanover, IL

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

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

Hanover, Illinois, USA

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