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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in Grant Park, Illinois, with temperature in the range of an average high of 30°F (-1.1°C) and an average low of 18.5°F (-7.5°C). Grant Park witnesses the coldest weather in January, with temperatures averaging a high of 30°F (-1.1°C) and a low of 18.5°F (-7.5°C). Weather in January »
Weather in February
February, the last month of the winter in Grant Park, is a wintry month, with an average temperature varying between 34.2°F (1.2°C) and 21.4°F (-5.9°C). Grant Park marks the start of February with an average high-temperature of an icy 34.2°F (1.2°C), hinting at a slight fluctuation from January's 30°F (-1.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Grant Park, Illinois, with an average temperature fluctuating between 47.1°F (8.4°C) and 32.9°F (0.5°C). The shift into March brings an increase in the average high-temperature, moving from an icy 34.2°F (1.2°C) in February to a chilly 47.1°F (8.4°C). Weather in March »
Weather in April
April in Grant Park, Illinois, is a mild spring month, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 58.6°F (14.8°C). April brings a rise in Grant Park's average high-temperature, moving from a frosty 47.1°F (8.4°C) in March to a moderate 58.6°F (14.8°C). Weather in April »
Weather in May
May, the last month of the spring in Grant Park, is a pleasant month, with an average temperature fluctuating between 54°F (12.2°C) and 70.7°F (21.5°C). The arrival of May signals an increase in the average high-temperature, moving from a mild 58.6°F (14.8°C) in April to an agreeable 70.7°F (21.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Grant Park, Illinois, with an average temperature ranging between max 79.2°F (26.2°C) and min 61.9°F (16.6°C). In June, the average high-temperature marginally rises from an agreeable 70.7°F (21.5°C) in May to a moderately hot 79.2°F (26.2°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Grant Park, Illinois, with an average temperature ranging between min 64.2°F (17.9°C) and max 81.1°F (27.3°C). July, marked by an average high-temperature of 81.1°F (27.3°C) and a low-temperature of 64.2°F (17.9°C), is the warmest month. The average heat index in July is computed to be a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Grant Park, is another warm month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 62.6°F (17°C). August begins with an average high-temperature of a still warm 79.7°F (26.5°C), reflecting close similarity to the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grant Park, Illinois, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 74.8°F (23.8°C). September's commencement is accompanied by an average high-temperature of a still warm 74.8°F (23.8°C), diverging marginally from August's 79.7°F (26.5°C). Weather in September »
Weather in October
October, like September, in Grant Park, Illinois, is another refreshing autumn month, with an average temperature varying between 61.7°F (16.5°C) and 46.6°F (8.1°C). The average high-temperature drops in October, from September's moderately hot 74.8°F (23.8°C) to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Grant Park, is another chilly month, with temperature in the range of an average high of 47.3°F (8.5°C) and an average low of 34.5°F (1.4°C). The beginning of November marks a clear shift in the average high-temperature, receding from October's enjoyable 61.7°F (16.5°C) to a chilly 47.3°F (8.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Grant Park, Illinois, with an average temperature varying between 25.7°F (-3.5°C) and 36.1°F (2.3°C). In December, the average high-temperature decreases from a frosty 47.3°F (8.5°C) in November to a cold 36.1°F (2.3°C). Weather in December »
Updated: Aug 6, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
With an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 18.5°F (-7.5°C), January is the coldest month.
How much does it rain?
Throughout the year, there are 132 rainfall days, and 15.16" (385mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 10.3 days and accumulates 1.42" (36mm) of snow.
How much does it snow?
Throughout the year, in Grant Park, there are 36.5 snowfall days, and 5.28" (134mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.7h of sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 5.1 days and typically collects 0.67" (17mm) of precipitation.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 15.6 days and accumulates 2.2" (56mm) of precipitation.
When it does not snow?
In Grant Park, snow does not fall in May through October.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What is the month with the most sunshine?
The months with the most sunshine are June through August, with an average of 9.8h of sunshine.
When is the highest UV index?
The months with the highest UV index in Grant Park, Illinois, are June and July, with an average maximum UV index of 6.
What time of the year is the hottest?
Grant Park's temperatures tend to reach their peak averages in July, with a high of 81.1°F (27.3°C) and a low of 64.2°F (17.9°C).
What is the most humid month?
July is the most humid month in Grant Park, with an average relative humidity of 84%.
What is the least humid month in Grant Park?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Grant Park, IL
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).
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).
Average pressure
Grant Park, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.1"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).
Average wind speed
Grant Park, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.5mph
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).
Average humidity
Grant Park, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Grant Park, IL
- Average rainfall in January:
0.79" - Average rainfall in February:
0.67" - Average rainfall in March:
0.98" - Average rainfall in April:
1.57" - Average rainfall in May:
2.2" - Average rainfall in June:
1.81"
- Average rainfall in July:
1.61" - Average rainfall in August:
1.61" - Average rainfall in September:
1.1" - Average rainfall in October:
1.18" - Average rainfall in November:
0.83" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days
Grant Park, IL
- Average rainfall days in January:
6.4 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
13.2 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
10 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
7 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).
Average snowfall
Grant Park, IL
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").
Average snowfall days
Grant Park, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
9.1 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.5 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).
Average daylight / Average sunshine
Grant Park, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
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).
Average sunshine days
Grant Park, IL
- Average sunshine days in January:
16.9 days - Average sunshine days in February:
15 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
17.9 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).
Average UV index
Grant Park, IL
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).
Average cloud cover
Grant Park, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Grant Park, IL
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).
Grant Park, Illinois, USA
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