December weather forecast
Niles, IL

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Weather in December

The first month of the winter, December, is also a wintry month in Niles, Illinois, with an average temperature ranging between min 26.1°F (-3.3°C) and max 35.1°F (1.7°C).

Temperature

As December arrives, Niles's weather displays a decrease in high-temperatures, transitioning from November's frosty 45.7°F (7.6°C) to a cold 35.1°F (1.7°C). Night temperatures during December in Niles, Illinois, stabilize at an average of 26.1°F (-3.3°C), closely mirroring the daytime temperatures.

Humidity

In Niles, the average relative humidity in December is 80%.

Rainfall

The month with the least rainfall in Niles is December, when the rain falls for 4.5 days and typically collects 0.31" (8mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Niles, in December, during 5.8 snowfall days, 0.16" (4mm) of snow is typically accumulated. Throughout the year, in Niles, there are 28.5 snowfall days, and 3.07" (78mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:00 am and sunset at 4:20 pm. On the last day of December, in Niles, sunrise is at 7:19 am and sunset at 4:29 pm CST.

Sunshine

The average sunshine in December is 3.9h.

UV index

The months with the lowest UV index in Niles are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 1 during December translates into the following directions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

How cold is December in Niles?

In December, in Niles, the average high-temperature is 35.1°F (1.7°C), and the average low-temperature is 26.1°F (-3.3°C).

What is the average humidity in December in Niles?

In Niles, the average relative humidity in December is 80%.

What is the driest month in Niles?

The month with the least rainfall in Niles is December, when the rain falls for 4.5 days and typically collects 0.31" (8mm) of precipitation.

How much does it rain in Niles in December?

In Niles, in December, during 4.5 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

How much does it snow in Niles in December?

In December, in Niles, Illinois, it is snowing for 5.8 days. Throughout December, 0.16" (4mm) of snow is accumulated.

What is the month with the shortest days in Niles?

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

How many hours of daylight does Niles have in December?

In Niles, Illinois, the average day length in December is 9h and 11min.

What time are sunrise and sunset in December in Niles?

On the first day of December in Niles, sunrise is at 7:00 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:29 pm CST.

How many hours of sunshine does Niles have in December?

In December, the average sunshine duration is 3.9h.

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

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

How high is the UV index in December in Niles?

In December, the average daily maximum UV index in Niles is 1. A UV Index reading of 2, and below, represents a low health risk 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
Niles, IL

Average temperature in December - Niles, IL
  • Average high temperature in December: 35.1°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in December: 26.1°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in December
Niles, IL

Average pressure in December - Niles, 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
Niles, IL

Average wind speed in December - Niles, IL
  • Average wind speed in December: 10.4mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in December
Niles, IL

Average humidity in December - Niles, IL
  • Average humidity in December: 80%

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

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Average rainfall in December
Niles, IL

Average rainfall in December - Niles, IL
  • Average rainfall in December: 0.31"

The wettest month (with the highest rainfall) is May (1.06").
The driest month (with the least rainfall) is December (0.31").

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Average rainfall days in December
Niles, IL

Average rainfall days in December - Niles, IL
  • Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in December
Niles, IL

Average snowfall in December - Niles, IL
  • Average snowfall in December: 0.16"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Niles, IL

Average snowfall days in December - Niles, IL
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is January (8.3 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
Niles, IL

Average daylight in December / Average sunshine in December - Niles, 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: 3h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in December
Niles, IL

Average sunshine days in December - Niles, IL
  • Average sunshine days in December: 23.3 days

The month with the most sunshine days is December (23.3 days).
The month with the least sunshine days is June (14.7 days).

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Average UV index in December
Niles, IL

Average UV index in December - Niles, 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
Niles, IL

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

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in December
Niles, IL

Average visibility in December - Niles, 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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Niles, Illinois, USA

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