January weather forecast
Island Lake, IL

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Weather in January

January, the same as December, in Island Lake, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 27°F (-2.8°C) and an average low of 15.3°F (-9.3°C).

Temperature

January, on average, is the coldest month, registering a high temperature of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C).

Humidity

The months with the highest humidity in Island Lake are January and February, with an average relative humidity of 84%.

Rainfall

In January, in Island Lake, the rain falls for 5.3 days. Throughout January, 1.3" (33mm) of precipitation is accumulated. In Island Lake, Illinois, during the entire year, the rain falls for 151.2 days and collects up to 24.17" (614mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. January is the month with the most snowfall in Island Lake, Illinois. Snow falls for 13.2 days and accumulates 3.82" (97mm) of snow.

Daylight

In Island Lake, the average length of the day in January is 9h and 31min.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:07 am and sunset at 5:05 pm CST.

Sunshine

With an average of 3.6h of sunshine, January has the least sunshine of the year in Island Lake.

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 minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 1 during January translates into the following guidance:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the coldest time of year in Island Lake?

In Island Lake, Illinois, the lowest temperatures are generally noted in January, averaging a high of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C).

How cold is it in Island Lake in January?

In January, the average high-temperature and low-temperature are 27°F (-2.8°C) and 15.3°F (-9.3°C) respectively.

What is the most humid month in Island Lake?

The months with the highest humidity in Island Lake are January and February, with an average relative humidity of 84%.

What is the average humidity in January in Island Lake?

In January, the average relative humidity is 84%.

How much does it rain in Island Lake in January?

In Island Lake, Illinois, during January, the rain falls for 5.3 days and regularly aggregates up to 1.3" (33mm) of precipitation.

When does it snow the most in Island Lake?

The month with the most snowfall is January, when snow falls for 13.2 days and typically aggregates up to 3.82" (97mm) of snow.

How much does it snow in Island Lake in January?

In Island Lake, Illinois, during January, snow falls for 13.2 days and regularly aggregates up to 3.82" (97mm) of snow.

What is the average length of the day in January in Island Lake?

The average day length in January in Island Lake is 9h and 31min.

When are sunrise and sunset in January in Island Lake?

In January, on the first day of the month, sunrise is at 7:21 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:05 pm CST.

What is the month with the least sunshine in Island Lake?

The month with the least sunshine in Island Lake, Illinois, is January, with an average of 3.6h of sunshine.

How long on average sun shines in January in Island Lake?

In Island Lake, the average sunshine duration in January is 3.6h.

What is the month with the lowest UV index in Island Lake?

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

What is the UV index intensity in January in Island Lake?

The average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
33.3°F 0.7°C
27°F -2.8°C
30.6°F -0.8°C
Average low temperature
23.2°F -4.9°C
15.3°F -9.3°C
18°F -7.8°C
Average pressure
30.09" 764mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
9.3mph 15km/h
10mph 16.1km/h
9.9mph 15.9km/h
Average max. wind speed
9.9mph 15.9km/h
10.6mph 17.1km/h
10.6mph 17.1km/h
Average wind speed gusts
14.5mph 23.3km/h
15.6mph 25.1km/h
15.6mph 25.1km/h
Average humidity
82%
84%
84%
Average rainfall
1.1" 28mm
1.3" 33mm
1.34" 34mm
Average rainfall days
8
5.3
5.3
Average snowfall
2.24" 57mm
3.82" 97mm
3.43" 87mm
Average snowfall days
10.8
13.2
10.8
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
4h 0min
3h 4min
3h 5min
Average sunshine days
14.8
13.7
11.6
Average UV index
1
1
2
Average cloud cover
59%
62%
59%
Average visibility
6mi 9.7km
5mi 8km
5mi 8km

Average temperature in January
Island Lake, IL

Average temperature in January - Island Lake, IL
  • Average high temperature in January: 27°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in January: 15.3°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure in January
Island Lake, IL

Average pressure in January - Island Lake, IL
  • Average pressure in January: 30.11"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 January
Island Lake, IL

Average wind speed in January - Island Lake, IL
  • Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in January
Island Lake, IL

Average humidity in January - Island Lake, IL
  • Average humidity in January: 84%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in January
Island Lake, IL

Average rainfall in January - Island Lake, IL
  • Average rainfall in January: 1.3"

The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is December (1.1").

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Average rainfall days in January
Island Lake, IL

Average rainfall days in January - Island Lake, IL
  • Average rainfall days in January: 5.3 days

The month with the highest number of rainy days is July (18.8 days).
The months with the least rainy days are January and February (5.3 days).

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Average snowfall in January
Island Lake, IL

Average snowfall in January - Island Lake, IL
  • Average snowfall in January: 3.82"

The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Island Lake, IL

Average snowfall days in January - Island Lake, IL
  • Average snowfall days in January: 13.2 days

The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Island Lake, IL

Average daylight in January / Average sunshine in January - Island Lake, IL
  • Average daylight in January: 9h and 3min

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 January: 3h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in January
Island Lake, IL

Average sunshine days in January - Island Lake, IL
  • Average sunshine days in January: 13.7 days

The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (10 days).

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Average UV index in January
Island Lake, IL

Average UV index in January - Island Lake, IL
  • Average UV index in January: 1

The month with the highest UV index is 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 January
Island Lake, IL

Average cloud cover in January - Island Lake, IL
  • Average cloud cover in January: 62

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in January
Island Lake, IL

Average visibility in January - Island Lake, IL
  • Average visibility in January: 5mi

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

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Island Lake, Illinois, USA

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