Climate and monthly weather forecastSouth Chicago Heights, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in South Chicago Heights, Illinois, with an average temperature varying between 29.7°F (-1.3°C) and 18.9°F (-7.3°C). South Chicago Heights reaches its lowest average temperatures in January, measuring 29.7°F (-1.3°C) at the peak and 18.9°F (-7.3°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in South Chicago Heights, is a cold month, with an average temperature varying between 21.2°F (-6°C) and 33.4°F (0.8°C). The average high-temperature is an icy 33.4°F (0.8°C) in February, hardly different from the 29.7°F (-1.3°C) recorded in January. Weather in February »Weather in March
March, the first month of the spring in South Chicago Heights, is a frosty month, with temperature in the range of an average high of 46°F (7.8°C) and an average low of 32.4°F (0.2°C). The arrival of March signals an increase in the average high-temperature, moving from a cold 33.4°F (0.8°C) in February to a frosty 46°F (7.8°C). Weather in March »Weather in April
April is a refreshing spring month in South Chicago Heights, Illinois, with an average temperature varying between 42.1°F (5.6°C) and 57.4°F (14.1°C). South Chicago Heights's April weather shows an increase in high-temperatures, moving from March's chilly 46°F (7.8°C) to a moderate 57.4°F (14.1°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in South Chicago Heights, Illinois, with temperature in the range of an average high of 69.8°F (21°C) and an average low of 53.1°F (11.7°C). The start of May is characterized by an increase in the average high-temperature, transitioning from a moderate 57.4°F (14.1°C) in April to an agreeable 69.8°F (21°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in South Chicago Heights, Illinois, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 61.5°F (16.4°C). The start of June signals a slight increase in the average high-temperature, moving from an agreeable 69.8°F (21°C) in May to a moderately hot 78.6°F (25.9°C). Weather in June »Weather in July
July, like June, in South Chicago Heights, Illinois, is another warm summer month, with an average temperature ranging between max 82°F (27.8°C) and min 65.7°F (18.7°C). In South Chicago Heights, July is the month with the highest recorded average temperatures, measuring a high of 82°F (27.8°C) and a low of 65.7°F (18.7°C). For most parts of July, the heat index is evaluated at a tropical 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in South Chicago Heights, is also a moderately hot month, with an average temperature varying between 80.4°F (26.9°C) and 64°F (17.8°C). South Chicago Heights commences August with an average high-temperature of a still warm 80.4°F (26.9°C), maintaining a close resemblance to the previous month. Weather in August »Weather in September
September, the first month of the autumn in South Chicago Heights, is still a warm month, with an average temperature varying between 57.6°F (14.2°C) and 74.5°F (23.6°C). September is characterized by a mild reduction in the average high-temperature, from a moderately hot 80.4°F (26.9°C) in August to a still warm 74.5°F (23.6°C). Weather in September »Weather in October
October, like September, in South Chicago Heights, Illinois, is another comfortable autumn month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 46.6°F (8.1°C). South Chicago Heights's weather in October involves a decrease in the average high-temperature, moving down from September's warm 74.5°F (23.6°C) to a comfortable 61.3°F (16.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in South Chicago Heights, Illinois, with an average temperature varying between 47.1°F (8.4°C) and 34.7°F (1.5°C). South Chicago Heights's November weather shows a moderate shift in high-temperatures, falling from October's refreshing 61.3°F (16.3°C) to a chilly 47.1°F (8.4°C). Weather in November »Weather in December
December, the first month of the winter in South Chicago Heights, is also an icy month, with an average temperature varying between 35.6°F (2°C) and 25.9°F (-3.4°C). South Chicago Heights's December weather comes with a decrease in average high-temperatures, moving from a frosty 47.1°F (8.4°C) in November to a wintry 35.6°F (2°C). Weather in December »Updated: Aug 30, 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
South Chicago Heights's coldest temperatures are experienced in January, with average high temperatures of 29.7°F (-1.3°C) and lows of 18.9°F (-7.3°C).
Throughout the year, there are 167.4 rainfall days, and 35" (889mm) of precipitation is accumulated.
January through April, October through December are months with snowfall.
Throughout the year, there are 47.8 snowfall days, and 20.04" (509mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.6h of sunshine.
February is the most humid month, with an average relative humidity of 83%.
February is the month with the most snowfall. Snow falls for 11.8 days and accumulates 5.35" (136mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in South 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.
May is the month with the most rainfall. Rain falls for 19.6 days and accumulates 4.53" (115mm) of precipitation.
May through September are months without snowfall in South Chicago Heights.
June has the longest days of the year, with an average of 15h and 6min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
July, marked by an average high-temperature of 82°F (27.8°C) and a low-temperature of 65.7°F (18.7°C), is the warmest month.
The month with the most sunshine is August, with an average of 9.8h of sunshine.
October is the least humid month, with an average relative humidity of 73%.
The month with the least rainfall is November, when the rain falls for 10.4 days and typically collects 1.81" (46mm) of precipitation.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
The month with the lowest UV index in South Chicago Heights is December, with an average maximum UV index of 1.
Average temperature
South Chicago Heights, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
South 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
South Chicago Heights, IL
- Average wind speed in January:
10mph - Average wind speed in February:
9.7mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.3mph - 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:
9.4mph
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).
Average humidity
South Chicago Heights, IL
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
South Chicago Heights, IL
- Average rainfall in January:
1.89" - Average rainfall in February:
1.89" - Average rainfall in March:
2.24" - Average rainfall in April:
3.86" - Average rainfall in May:
4.53" - Average rainfall in June:
4.33"
- Average rainfall in July:
3.78" - Average rainfall in August:
3.31" - Average rainfall in September:
2.56" - Average rainfall in October:
2.91" - Average rainfall in November:
1.81" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days
South Chicago Heights, IL
- Average rainfall days in January:
7.2 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
19.6 days - Average rainfall days in June:
19.4 days
- Average rainfall days in July:
20.1 days - Average rainfall days in August:
17.6 days - Average rainfall days in September:
14.5 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (6.2 days).
Average snowfall
South Chicago Heights, IL
The month with the highest snowfall is February (5.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
South Chicago Heights, IL
- Average snowfall days in January:
13.2 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
6.6 days - Average snowfall days in April:
2.1 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:
0.5 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
9.8 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).
Average daylight / Average sunshine
South Chicago Heights, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 12min
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 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 30min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
South Chicago Heights, IL
- Average sunshine days in January:
12.5 days - Average sunshine days in February:
10.7 days - Average sunshine days in March:
12.7 days - Average sunshine days in April:
9.6 days - Average sunshine days in May:
8.9 days - Average sunshine days in June:
8.5 days
- Average sunshine days in July:
7.8 days - Average sunshine days in August:
9.3 days - Average sunshine days in September:
12.7 days - Average sunshine days in October:
14.3 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
14 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is July (7.8 days).
Average UV index
South 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
South 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 33).
Average visibility
South Chicago Heights, IL
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
