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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 Chicago Heights, Illinois, with an average temperature varying between 29.7°F (-1.3°C) and 18.9°F (-7.3°C). The coldest month is January, with an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 18.9°F (-7.3°C). Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Chicago Heights, Illinois, with temperature in the range of an average low of 21.2°F (-6°C) and an average high of 33.1°F (0.6°C). Chicago Heights, Illinois, experiences an average high-temperature of an icy 33.1°F (0.6°C) in February, marking an insignificant shift from 29.7°F (-1.3°C) in January. Weather in February »
Weather in March
March, the first month of the spring in Chicago Heights, is a frosty month, with an average temperature varying between 45.5°F (7.5°C) and 32.4°F (0.2°C). March signals a shift in the average high-temperature, moving from February's wintry 33.1°F (0.6°C) to a frosty 45.5°F (7.5°C). Weather in March »
Weather in April
April is a refreshing spring month in Chicago Heights, Illinois, with temperature in the range of an average high of 56.7°F (13.7°C) and an average low of 41.7°F (5.4°C). April's arrival signals a temperature shift, moving from a chilly 45.5°F (7.5°C) in March to a refreshing 56.7°F (13.7°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Chicago Heights, Illinois, with an average temperature fluctuating between 52.3°F (11.3°C) and 68.7°F (20.4°C). With the onset of May, Chicago Heights sees a temperature rise, with the average high-temperature moving from April's refreshing 56.7°F (13.7°C) to a pleasant 68.7°F (20.4°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Chicago Heights, Illinois, with an average temperature varying between 77.7°F (25.4°C) and 61.7°F (16.5°C). Chicago Heights's weather shows a temperature rise with the arrival of June, moving from an agreeable 68.7°F (20.4°C) in May to a moderately hot 77.7°F (25.4°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Chicago Heights, Illinois, with an average temperature varying between 81.3°F (27.4°C) and 65.8°F (18.8°C). In Chicago Heights, the average temperatures in July are the highest, with a peak at 81.3°F (27.4°C) and a low of 65.8°F (18.8°C). During July, the heat index is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Chicago Heights, Illinois, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 80.1°F (26.7°C). The shift into August uncovers an average high-temperature of a still moderately hot 80.1°F (26.7°C), subtly different from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Chicago Heights, is still a warm month, with an average temperature fluctuating between 73.9°F (23.3°C) and 58.3°F (14.6°C). September brings a minor shift in the average high-temperature, adjusting from 80.1°F (26.7°C) in August to a still moderately hot 73.9°F (23.3°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Chicago Heights, Illinois, with temperature in the range of an average high of 61.2°F (16.2°C) and an average low of 46.9°F (8.3°C). The onset of October introduces a moderate change in Chicago Heights's weather, with average high-temperatures falling from September's warm 73.9°F (23.3°C) to an enjoyable 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Chicago Heights, is also a frosty month, with an average temperature varying between 34.9°F (1.6°C) and 46.9°F (8.3°C). Chicago Heights's average high-temperature decreases in November, falling from a refreshing 61.2°F (16.2°C) in October to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
December, the first month of the winter in Chicago Heights, is still a cold month, with an average temperature fluctuating between 25.9°F (-3.4°C) and 35.6°F (2°C). The onset of December comes with a shift in the average high-temperature, falling from a frosty 46.9°F (8.3°C) in November to a wintry 35.6°F (2°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Chicago Heights?
January, with its high-temperature average of 29.7°F (-1.3°C) and a low-temperature average of 18.9°F (-7.3°C), is the coldest month.
What are the most humid months in Chicago Heights?
January and February, with an average relative humidity of 82%, are most humid months in Chicago Heights.
How many days does it rain in Chicago Heights?
In Chicago Heights, Illinois, during the entire year, the rain falls for 155.6 days and collects up to 31.3" (795mm) of precipitation.
When does it snow in Chicago Heights?
January through April, October through December are months with snowfall.
When does it snow the most in Chicago Heights?
The month with the most snowfall is January, when snow falls for 12.6 days and typically aggregates up to 4.53" (115mm) of snow.
How many days does it snow in Chicago Heights?
In Chicago Heights, during the entire year, snow falls for 44.6 days and aggregates up to 16.46" (418mm) of snow.
What is the month with the least sunshine in Chicago Heights?
The month with the least sunshine in Chicago Heights, Illinois, is January, with an average of 3.6h of sunshine.
When is Daylight Saving Time (DST) in Chicago Heights?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Chicago Heights, 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 rainiest month in Chicago Heights?
May is the month with the most rainfall in Chicago Heights, Illinois. Rain falls for 17.4 days and accumulates 4.17" (106mm) of precipitation.
When it does not snow in Chicago Heights?
In Chicago Heights, snow does not fall in May through September.
When are the longest days in Chicago Heights?
The month with the longest days in Chicago Heights is June, with an average of 15h and 6min of daylight.
When is the highest UV index in Chicago Heights?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What part of the year is the hottest in Chicago Heights?
In Chicago Heights, July is identified by the average highest temperatures, reaching a peak of 81.3°F (27.4°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine in Chicago Heights?
August has the most sunshine of the year in Chicago Heights, with an average of 10.1h of sunshine.
What is the least humid month in Chicago Heights?
The least humid month in Chicago Heights is October, with an average relative humidity of 73%.
What is the driest month in Chicago Heights?
December is the month with the least rainfall. Rain falls for 7.9 days and accumulates 1.54" (39mm) of precipitation.
What is the month with the shortest days in Chicago Heights?
The month with the shortest days in Chicago Heights is December, with an average of 9h and 12min of daylight.
When is the lowest UV index in Chicago Heights?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Chicago Heights, IL
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Chicago Heights, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"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:
30.1"Hg - Average pressure in December:
30.1"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).
Average wind speed
Chicago Heights, IL
- Average wind speed in January:
10.2mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Chicago Heights, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Chicago Heights, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.69" - Average rainfall in March:
2.09" - Average rainfall in April:
3.43" - Average rainfall in May:
4.17" - Average rainfall in June:
3.82"
- Average rainfall in July:
3.31" - Average rainfall in August:
2.56" - Average rainfall in September:
2.48" - Average rainfall in October:
2.76" - Average rainfall in November:
1.69" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days
Chicago Heights, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
7.9 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
Chicago Heights, IL
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Chicago Heights, IL
- Average snowfall days in January:
12.6 days - Average snowfall days in February:
10.5 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
1.9 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
4 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Chicago Heights, 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 1min
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 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Chicago Heights, IL
- Average sunshine days in January:
13 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
14 days - Average sunshine days in October:
14.4 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
15 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index
Chicago Heights, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Chicago Heights, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Chicago Heights, IL
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Chicago Heights, Illinois, USA
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