December weather forecast
Elmhurst, IL

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Weather in December

December rolls in with a chilly air in Elmhurst, Illinois, with temperatures hovering around a cold average high of 34.7°F (1.5°C). With 2.24" (57mm) of snowfall, the winter weather is in full swing. Shorter days and longer nights make for a cozy atmosphere, especially with the holiday cheer around. The winds carry a nip, twinkling holiday lights light up the town, and the year ends on a frosty note. The anticipation of significant snowfall in the coming months adds to the winter allure.

Temperature

As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a chilly 45.9°F (7.7°C) to a wintry 34.7°F (1.5°C). In December, Elmhurst experiences a temperature dip to an average of 25.2°F (-3.8°C) at night.

Humidity

The average relative humidity in December is 81%.

Rainfall

December is the month with the least rainfall. Rain falls for 7.9 days and accumulates 1.14" (29mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Elmhurst. In Elmhurst, in December, during 9.9 snowfall days, 2.24" (57mm) of snow is typically accumulated. In Elmhurst, during the entire year, snow falls for 45.8 days and aggregates up to 14.25" (362mm) of snow.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of December in Elmhurst, sunrise is at 7:00 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:30 pm CST.

Sunshine

In December, the average sunshine is 4.1h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Elmhurst in December?

The average high-temperature, in December, in Elmhurst, is 34.7°F (1.5°C), while the average low-temperature is 25.2°F (-3.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in July is appraised at 87.8°F (31°C).

What is the average humidity in December in Elmhurst?

The average relative humidity in December is 81%.

What is the driest month in Elmhurst?

December is the month with the least rainfall in Elmhurst, Illinois. Rain falls for 7.9 days and accumulates 1.14" (29mm) of precipitation.

How many days does it rain in December in Elmhurst?

In Elmhurst, during December, the rain falls for 7.9 days and regularly aggregates up to 1.14" (29mm) of precipitation.

How much does it snow in Elmhurst in December?

In Elmhurst, in December, snow falls for 9.9 days, with typically accumulated 2.24" (57mm) of snow.

What is the month with the shortest days in Elmhurst?

The month with the shortest days in Elmhurst is December, with an average of 9h and 12min of daylight.

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

The average day length in December is 9h and 11min.

What time are sunrise and sunset in December in Elmhurst?

On the first day of December in Elmhurst, Illinois, sunrise is at 7:00 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:30 pm CST.

How many hours of sunshine does Elmhurst have in December?

In Elmhurst, Illinois, the average sunshine duration in December is 4.1h.

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

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

How high is the UV index in December in Elmhurst?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Elmhurst, IL

Average temperature in December - Elmhurst, IL
  • Average high temperature in December: 34.7°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 (28.8°F).

  • Average low temperature in December: 25.2°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in December
Elmhurst, IL

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

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Elmhurst, IL

Average wind speed in December - Elmhurst, IL
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in December
Elmhurst, IL

Average humidity in December - Elmhurst, IL
  • Average humidity in December: 81%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Elmhurst, IL

Average rainfall in December - Elmhurst, IL
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").

Average rainfall days in December
Elmhurst, IL

Average rainfall days in December - Elmhurst, IL
  • Average rainfall days in December: 7.9 days

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is February (5.1 days).

Average snowfall in December
Elmhurst, IL

Average snowfall in December - Elmhurst, IL
  • Average snowfall in December: 2.24"

The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Elmhurst, IL

Average snowfall days in December - Elmhurst, IL
  • Average snowfall days in December: 9.9 days

The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Elmhurst, 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 months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in December
Elmhurst, IL

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

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in December
Elmhurst, IL

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

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

Average cloud cover in December
Elmhurst, IL

Average cloud cover in December - Elmhurst, IL
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in December
Elmhurst, IL

Average visibility in December - Elmhurst, 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).

Elmhurst, Illinois, USA

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