December weather forecast
Lena, IL

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Weather in December

December in Lena welcomes winter with open arms, with short daylight hours, low temperatures, and increased snowfall. Frosty weather creates striking white landscapes and holiday atmospheres throughout the town. It's a month of indoor activities and celebrations, with families huddling around warm fireplaces. Despite the cold, there is a noticeable charm, as the highest snowfall of 2.52" (64mm) blankets the city in white. While the temperatures may be severe, the festive spirit, bolstered by the snowy backdrop, ensures high morale throughout the blustery winter days.

Temperature

December in Lena shows a mild decline in the average high-temperature, falling from November's frosty 43.9°F (6.6°C) to a subzero cold 31.6°F (-0.2°C). Throughout the month of December, Lena witnesses an average temperature of 21.4°F (-5.9°C).

Humidity

In December, the average relative humidity is 83%.

Rainfall

In December, the rain falls for 7.4 days. Throughout December, 1.1" (28mm) of precipitation is accumulated. In Lena, during the entire year, the rain falls for 145.9 days and collects up to 22.8" (579mm) of precipitation.

Snowfall

Months with snowfall in Lena are January through April, October through December. In Lena, in December, snow falls for 11.3 days, with typically accumulated 2.52" (64mm) of snow. Throughout the year, in Lena, there are 50.1 snowfall days, and 13.62" (346mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:27 pm. On the last day of December, in Lena, sunrise is at 7:28 am and sunset at 4:36 pm CST.

Sunshine

In December, the average sunshine is 4h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is it in Lena in December?

The high-temperature, in December, in Lena, records 31.6°F (-0.2°C), while the low-temperature is 21.4°F (-5.9°C).

What is the average humidity in December in Lena?

In December, the average relative humidity in Lena is 83%.

How much does it rain in Lena in December?

In Lena, Illinois, in December, during 7.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

How much does it snow in Lena in December?

In December, in Lena, Illinois, it is snowing for 11.3 days. Throughout December, 2.52" (64mm) of snow is accumulated.

What is the month with the shortest days in Lena?

With an average of 9h and 6min of daylight, December has the shortest days of the year.

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

In December, the average day length in Lena is 9h and 8min.

When is the sunrise / sunset in December in Lena?

On the first day of December in Lena, Illinois, sunrise is at 7:09 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:36 pm CST.

How long on average sun shines in December in Lena?

The average sunshine duration in December in Lena, Illinois, is 4h.

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

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

What is the UV index reading in December in Lena?

In Lena, Illinois, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
43.9°F 6.6°C
31.6°F -0.2°C
24.8°F -4°C
Average low temperature
30.6°F -0.8°C
21.4°F -5.9°C
12.9°F -10.6°C
Average pressure
30.09" 764mmHg
30.09" 764mmHg
30.12" 765mmHg
Average wind speed
9.8mph 15.8km/h
9.5mph 15.3km/h
9.9mph 15.9km/h
Average max. wind speed
10.5mph 16.9km/h
10.2mph 16.4km/h
10.5mph 16.9km/h
Average wind speed gusts
15.9mph 25.6km/h
15mph 24.1km/h
15.9mph 25.6km/h
Average humidity
77%
83%
87%
Average rainfall
1.34" 34mm
1.1" 28mm
1.06" 27mm
Average rainfall days
8.8
7.4
5.3
Average snowfall
1.38" 35mm
2.52" 64mm
3.46" 88mm
Average snowfall days
4
11.3
13.1
Average daylight
9h 5min
9h 1min
9h 3min
Average sunshine
5h 0min
4h 0min
3h 4min
Average sunshine days
17.5
15.3
14.3
Average UV index
2
1
1
Average cloud cover
45%
59%
63%
Average visibility
6mi 9.7km
6mi 9.7km
5mi 8km

Average temperature in December
Lena, IL

Average temperature in December - Lena, IL
  • Average high temperature in December: 31.6°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.8°F).

  • Average low temperature in December: 21.4°F

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).

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Average pressure in December
Lena, IL

Average pressure in December - Lena, IL
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Lena, IL

Average wind speed in December - Lena, IL
  • Average wind speed in December: 9.5mph

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).

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Average humidity in December
Lena, IL

Average humidity in December - Lena, IL
  • Average humidity in December: 83%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).

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Average rainfall in December
Lena, IL

Average rainfall in December - Lena, IL
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days in December
Lena, IL

Average rainfall days in December - Lena, IL
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (5.3 days).

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Average snowfall in December
Lena, IL

Average snowfall in December - Lena, IL
  • Average snowfall in December: 2.52"

The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Lena, IL

Average snowfall days in December - Lena, IL
  • Average snowfall days in December: 11.3 days

The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Lena, 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 6min).

  • Average sunshine in December: 4h and 0min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in December
Lena, IL

Average sunshine days in December - Lena, IL
  • Average sunshine days in December: 15.3 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in December
Lena, IL

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Lena, IL

Average cloud cover in December - Lena, IL
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 33).

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Average visibility in December
Lena, IL

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

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

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Lena, Illinois, USA

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