January weather forecast
Grant Park, IL

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Weather in January

January, like December, is another subzero cold winter month in Grant Park, Illinois, with an average temperature varying between 30°F (-1.1°C) and 18.5°F (-7.5°C).

Temperature

Grant Park experiences its lowest temperatures in January, with an average peak of 30°F (-1.1°C) and a low of 18.5°F (-7.5°C).

Humidity

In Grant Park, the average relative humidity in January is 82%.

Rainfall

In January, in Grant Park, Illinois, the rain falls for 6.4 days. Throughout January, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 132 rainfall days, and 15.16" (385mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. The month with the most snowfall is January, when snow falls for 10.3 days and typically aggregates up to 1.42" (36mm) of snow.

Daylight

In Grant Park, the average length of the day in January is 9h and 37min.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:31 pm. On the last day of January, in Grant Park, sunrise is at 7:02 am and sunset at 5:05 pm CST.

Sunshine

The month with the least sunshine in Grant Park is January, with an average of 3.7h of sunshine.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 1 in January leads to these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What time of the year is the coldest in Grant Park?

January, noted for its average high-temperature of 30°F (-1.1°C) and an average low-temperature of 18.5°F (-7.5°C), is considered the coldest month in Grant Park.

How cold is January in Grant Park?

In Grant Park, in January, the average high-temperature is 30°F (-1.1°C), and the average low-temperature is 18.5°F (-7.5°C).

What is the average humidity in January in Grant Park?

In Grant Park, Illinois, the average relative humidity in January is 82%.

How many days does it rain in January in Grant Park?

In January, the rain falls for 6.4 days. Throughout January, 0.79" (20mm) of precipitation is accumulated.

When does it snow the most in Grant Park?

January is the month with the most snowfall in Grant Park. Snow falls for 10.3 days and accumulates 1.42" (36mm) of snow.

How many days does it snow in January in Grant Park?

In Grant Park, Illinois, in January, snow falls for 10.3 days, with typically accumulated 1.42" (36mm) of snow.

What is the average length of the day in January in Grant Park?

The average day length in January in Grant Park, Illinois, is 9h and 37min.

What time are sunrise and sunset in January in Grant Park?

On the first day of January, sunrise is at 7:16 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 5:05 pm CST.

What is the month with the least sunshine in Grant Park?

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

How many hours of sunshine does Grant Park have in January?

The average sunshine duration in January is 3.7h.

When is the lowest UV index in Grant Park?

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

How high is the UV index in January in Grant Park?

The average daily maximum UV index in January in Grant Park is 1. A UV Index of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
36.1°F 2.3°C
30°F -1.1°C
34.2°F 1.2°C
Average low temperature
25.7°F -3.5°C
18.5°F -7.5°C
21.4°F -5.9°C
Average pressure
30.1" 765mmHg
30.12" 765mmHg
30.1" 765mmHg
Average wind speed
9.5mph 15.3km/h
10.1mph 16.3km/h
9.8mph 15.8km/h
Average max. wind speed
10.2mph 16.4km/h
10.7mph 17.2km/h
10.5mph 16.9km/h
Average wind speed gusts
15mph 24.1km/h
15.8mph 25.4km/h
15.7mph 25.3km/h
Average humidity
81%
82%
82%
Average rainfall
0.79" 20mm
0.79" 20mm
0.67" 17mm
Average rainfall days
7
6.4
5.1
Average snowfall
0.87" 22mm
1.42" 36mm
1.26" 32mm
Average snowfall days
7.5
10.3
9.1
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 1min
3h 4min
4h 0min
Average sunshine days
17.9
16.9
15
Average UV index
1
1
2
Average cloud cover
57%
60%
58%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Grant Park, IL

Average temperature in January - Grant Park, IL
  • Average high temperature in January: 30°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in January: 18.5°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

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Average pressure in January
Grant Park, IL

Average pressure in January - Grant Park, IL
  • Average pressure in January: 30.12"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Grant Park, IL

Average wind speed in January - Grant Park, IL
  • Average wind speed in January: 10.1mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

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Average humidity in January
Grant Park, IL

Average humidity in January - Grant Park, IL
  • Average humidity in January: 82%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in January
Grant Park, IL

Average rainfall in January - Grant Park, IL
  • Average rainfall in January: 0.79"

The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.67").

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Average rainfall days in January
Grant Park, IL

Average rainfall days in January - Grant Park, IL
  • Average rainfall days in January: 6.4 days

The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (5.1 days).

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Average snowfall in January
Grant Park, IL

Average snowfall in January - Grant Park, IL
  • Average snowfall in January: 1.42"

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Grant Park, IL

Average snowfall days in January - Grant Park, IL
  • Average snowfall days in January: 10.3 days

The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Grant Park, IL

Average daylight in January / Average sunshine in January - Grant Park, IL
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 3h and 4min

The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in January
Grant Park, IL

Average sunshine days in January - Grant Park, IL
  • Average sunshine days in January: 16.9 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (10.7 days).

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Average UV index in January
Grant Park, IL

Average UV index in January - Grant Park, IL
  • Average UV index in January: 1

The months with the highest UV index are June and July (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
Grant Park, IL

Average cloud cover in January - Grant Park, IL
  • Average cloud cover in January: 60

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in January
Grant Park, IL

Average visibility in January - Grant Park, IL
  • Average visibility in January: 6mi

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

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Grant Park, Illinois, USA

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