December weather forecast
Elmhurst, IL

Weather in December

The first month of the winter, December, is still a cold month in Elmhurst, Illinois, with an average temperature fluctuating between 25.2°F (-3.8°C) and 34.7°F (1.5°C).

Temperature

In December, the average high-temperature drops from a chilly 45.9°F (7.7°C) in November to a cold 34.7°F (1.5°C). In Elmhurst, the average low-temperature is 25.2°F (-3.8°C).

Humidity

The average relative humidity in December in Elmhurst is 81%.

Rainfall

December is the month with the least rainfall in Elmhurst. 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 December, snow falls for 9.9 days, with typically accumulated 2.24" (57mm) of snow. 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 11min of daylight, December has the shortest days of the year in Elmhurst, Illinois.
On the first day of the month, sunrise is at 7:00 am and sunset at 4:21 pm. On the last day of December, in Elmhurst, Illinois, sunrise is at 7:19 am and sunset at 4:30 pm CST.

Sunshine

The average sunshine in December in Elmhurst is 4.1h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Elmhurst. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Elmhurst?

The average relative humidity in December in Elmhurst is 81%.

What is the driest month in Elmhurst?

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

How much does it rain in Elmhurst in December?

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

How many days does it snow in December in Elmhurst?

In Elmhurst, in December, during 9.9 snowfall days, 2.24" (57mm) of snow is typically accumulated.

What is the month with the shortest days in Elmhurst?

December has the shortest days of the year in Elmhurst, with an average of 9h and 11min of daylight.

How many hours of daylight does Elmhurst have in December?

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

When are sunrise and sunset in December in Elmhurst?

On the first day of December, 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, the average sunshine duration in December is 4.1h.

What is the month with the lowest UV index in Elmhurst?

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

What is the UV index reading in December in Elmhurst?

In Elmhurst, Illinois, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health threat 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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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 11min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in December: 4h and 6min

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).

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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).

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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).

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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).

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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).

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