December weather forecast
Metropolis, IL

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Weather in December

December, the first month of the winter in Metropolis, is also a frosty month, with an average temperature varying between 33.3°F (0.7°C) and 45.5°F (7.5°C).

Temperature

December ushers in a slight temperature change, with average high-temperatures reducing from November's fresh 54.9°F (12.7°C) to a chilly 45.5°F (7.5°C). December nights are marked by an average temperature drop to a wintry 33.3°F (0.7°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Metropolis, in December, during 11.5 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. In Metropolis, Illinois, during the entire year, the rain falls for 160.7 days and collects up to 36.73" (933mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 2 days. Throughout December, 0.47" (12mm) of snow is accumulated. Throughout the year, there are 12.9 snowfall days, and 4.33" (110mm) of snow is accumulated.

Daylight

With an average of 9h and 42min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:50 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:48 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Updated: Jun 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Metropolis in December?

The average high-temperature, in December, in Metropolis, is 45.5°F (7.5°C), while the average low-temperature is 33.3°F (0.7°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is appraised at 86°F (30°C).

What is the average humidity in December in Metropolis?

The average relative humidity in December in Metropolis is 78%.

How much does it rain in December?

In Metropolis, during December, the rain falls for 11.5 days and regularly aggregates up to 3.03" (77mm) of precipitation.

How many days does it snow in December?

In Metropolis, in December, snow falls for 2 days, with typically accumulated 0.47" (12mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 42min of daylight.

How many hours of daylight does Metropolis have in December?

The average day length in December is 9h and 40min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:50 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:48 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.9h.

What are the months with the lowest UV index?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents 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
Metropolis, IL

Average temperature in December - Metropolis, IL
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41.4°F).

  • Average low temperature in December: 33.3°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (28°F).

Average pressure in December
Metropolis, IL

Average pressure in December - Metropolis, IL
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Metropolis, IL

Average wind speed in December - Metropolis, IL
  • Average wind speed in December: 8.3mph

The windiest months (with the highest average wind speed) are January, March and April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

Average humidity in December
Metropolis, IL

Average humidity in December - Metropolis, IL
  • Average humidity in December: 78%

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Metropolis, IL

Average rainfall in December - Metropolis, IL
  • Average rainfall in December: 3.03"

The wettest month (with the highest rainfall) is April (4.29").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in December
Metropolis, IL

Average rainfall days in December - Metropolis, IL
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is October (10.2 days).

Average snowfall in December
Metropolis, IL

Average snowfall in December - Metropolis, IL
  • Average snowfall in December: 0.47"

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
Metropolis, IL

Average snowfall days in December - Metropolis, IL
  • Average snowfall days in December: 2 days

The month with the highest number of snowfall days is January (4.3 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
Metropolis, IL

Average daylight in December / Average sunshine in December - Metropolis, IL
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
Metropolis, IL

Average sunshine days in December - Metropolis, IL
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is May (11 days).

Average UV index in December
Metropolis, IL

Average UV index in December - Metropolis, 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 and December (UV index 2).

Average cloud cover in December
Metropolis, IL

Average cloud cover in December - Metropolis, IL
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is September (Cloud cover 26).

Average visibility in December
Metropolis, IL

Average visibility in December - Metropolis, 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).

Metropolis, Illinois, USA

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