January weather forecast
Mundelein, IL

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Weather in January

January, like December, is another subzero cold winter month in Mundelein, Illinois, with an average temperature fluctuating between 27.9°F (-2.3°C) and 16.5°F (-8.6°C).

Temperature

Mundelein's coldest temperatures are experienced in January, with average high temperatures of 27.9°F (-2.3°C) and lows of 16.5°F (-8.6°C).

Humidity

The months with the highest humidity are January and February, with an average relative humidity of 83%.

Rainfall

In Mundelein, in January, during 6.3 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Mundelein, during the entire year, the rain falls for 147.3 days and collects up to 27.44" (697mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In January, it is snowing for 12.9 days. Throughout January, 4.65" (118mm) of snow is accumulated. Throughout the year, there are 48.2 snowfall days, and 18.86" (479mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 31min.
On the first day of January, sunrise is at 7:20 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:04 pm CST.

Sunshine

January has the least sunshine of the year, with an average of 3.7h of sunshine.

UV index

The average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 2 during January, leads to the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

January is the month when Mundelein sees the average lowest temperatures, with a high of 27.9°F (-2.3°C) and a low of 16.5°F (-8.6°C).

How cold is it in January?

In January, in Mundelein, the average high-temperature is 27.9°F (-2.3°C), and the average low-temperature is 16.5°F (-8.6°C).

What are the most humid months?

January and February, with an average relative humidity of 83%, are most humid months.

What is the average humidity in January?

The average relative humidity in January in Mundelein is 83%.

How much does it rain in January?

In Mundelein, in January, it is raining for 6.3 days, with typically 1.34" (34mm) of accumulated precipitation.

How much does it snow in January?

In Mundelein, in January, snow falls for 12.9 days, with typically accumulated 4.65" (118mm) of snow.

What is the average length of the day in January?

In Mundelein, the average day length in January is 9h and 31min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:20 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:04 pm CST.

What is the month with the least sunshine?

January has the least sunshine of the year in Mundelein, Illinois, with an average of 3.7h of sunshine.

How long on average sun shines in January?

The average sunshine duration in January is 3.7h.

How high is the UV index in January?

In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
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 January
Mundelein, IL

Average temperature in January - Mundelein, IL
  • Average high temperature in January: 27.9°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in January: 16.5°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

Average pressure in January
Mundelein, IL

Average pressure in January - Mundelein, IL
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in January
Mundelein, IL

Average wind speed in January - Mundelein, IL
  • Average wind speed in January: 10.3mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in January
Mundelein, IL

Average humidity in January - Mundelein, IL
  • Average humidity in January: 83%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in January
Mundelein, IL

Average rainfall in January - Mundelein, IL
  • Average rainfall in January: 1.34"

The wettest month (with the highest rainfall) is June (3.54").
The driest months (with the least rainfall) are November and December (1.3").

Average rainfall days in January
Mundelein, IL

Average rainfall days in January - Mundelein, IL
  • Average rainfall days in January: 6.3 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in January
Mundelein, IL

Average snowfall in January - Mundelein, IL
  • Average snowfall in January: 4.65"

The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Mundelein, IL

Average snowfall days in January - Mundelein, IL
  • Average snowfall days in January: 12.9 days

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
Mundelein, IL

Average daylight in January / Average sunshine in January - Mundelein, 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 12min).

  • Average sunshine in January: 3h and 4min

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 January
Mundelein, IL

Average sunshine days in January - Mundelein, IL
  • Average sunshine days in January: 13 days

The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10 days).

Average UV index in January
Mundelein, IL

Average UV index in January - Mundelein, IL
  • Average UV index in January: 2

The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in January
Mundelein, IL

Average cloud cover in January - Mundelein, IL
  • Average cloud cover in January: 61

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

Average visibility in January
Mundelein, IL

Average visibility in January - Mundelein, 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).

Mundelein, Illinois, USA

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