Expand
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, the same as December, in Prospect Heights, Illinois, is a freezing cold winter month, with an average temperature ranging between max 28.2°F (-2.1°C) and min 18°F (-7.8°C). In Prospect Heights, the month of January is known for its lowest average temperatures, reaching a high of 28.2°F (-2.1°C) and a low of 18°F (-7.8°C). Weather in January »
Weather in February
February, the last month of the winter in Prospect Heights, is also a subzero cold month, with temperature in the range of an average low of 20.5°F (-6.4°C) and an average high of 31.6°F (-0.2°C). Prospect Heights, Illinois, registers an average high-temperature of a still freezing cold 31.6°F (-0.2°C) with the arrival of February, showing minor deviation from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Prospect Heights, Illinois, with an average temperature ranging between max 43.5°F (6.4°C) and min 30.9°F (-0.6°C). Entering March, Prospect Heights sees a temperature rise, with the average high-temperature advancing from February's subzero cold 31.6°F (-0.2°C) to a frosty 43.5°F (6.4°C). Weather in March »
Weather in April
April is a fresh spring month in Prospect Heights, Illinois, with an average temperature varying between 40.1°F (4.5°C) and 54.3°F (12.4°C). Prospect Heights in April shows a temperature shift, moving from an average high of a frosty 43.5°F (6.4°C) in March to a cool 54.3°F (12.4°C). Weather in April »
Weather in May
May, the last month of the spring in Prospect Heights, is a comfortable month, with an average temperature ranging between min 50.5°F (10.3°C) and max 65.8°F (18.8°C). The start of May signals an increase in the average high-temperature, moving from a fresh 54.3°F (12.4°C) in April to an enjoyable 65.8°F (18.8°C). Weather in May »
Weather in June
June, the first month of the summer in Prospect Heights, is a warm month, with an average temperature ranging between max 75.9°F (24.4°C) and min 60.4°F (15.8°C). June's arrival brings a temperature shift, moving from a comfortable 65.8°F (18.8°C) in May to a warm 75.9°F (24.4°C). Weather in June »
Weather in July
July, like June, in Prospect Heights, Illinois, is a moderately hot summer month, with an average temperature ranging between min 66.4°F (19.1°C) and max 81.1°F (27.3°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 81.1°F (27.3°C) and a low of 66.4°F (19.1°C). The heat index for July is calculated to be a hot 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Prospect Heights, is another warm month, with an average temperature varying between 79.7°F (26.5°C) and 65.5°F (18.6°C). The weather during August records an average high-temperature of a still moderately hot 79.7°F (26.5°C), closely mirroring the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Prospect Heights, is still a pleasant month, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 73.2°F (22.9°C). September reveals a small adjustment in temperature, transitioning from an average high of a moderately hot 79.7°F (26.5°C) in August to an agreeable 73.2°F (22.9°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Prospect Heights, Illinois, with an average temperature ranging between min 46.4°F (8°C) and max 59.9°F (15.5°C). In October, the average high-temperature goes from a pleasant 73.2°F (22.9°C) in September to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Prospect Heights, Illinois, with temperature in the range of an average low of 34°F (1.1°C) and an average high of 45.5°F (7.5°C). The onset of November marks a clear decrease in the average high-temperature, dropping from a refreshing 59.9°F (15.5°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Prospect Heights, is also a wintry month, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 34.7°F (1.5°C). Welcoming December, Prospect Heights observes a shift in the average high-temperature, falling from November's frosty 45.5°F (7.5°C) to a cold 34.7°F (1.5°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Prospect Heights?
The month of January, characterized by an average high of 28.2°F (-2.1°C) and a low of 18°F (-7.8°C), is recognized as the coldest in Prospect Heights, Illinois.
What are the most humid months in Prospect Heights?
January and February, with an average relative humidity of 82%, are most humid months in Prospect Heights.
How much does it rain in Prospect Heights?
Throughout the year, in Prospect Heights, there are 153.3 rainfall days, and 30.12" (765mm) of precipitation is accumulated.
When does it snow in Prospect Heights?
Months with snowfall in Prospect Heights, Illinois, are January through May, October through December.
What is the snowiest month in Prospect Heights?
January is the month with the most snowfall. Snow falls for 11.8 days and accumulates 4.96" (126mm) of snow.
How many days does it snow in Prospect Heights?
Throughout the year, in Prospect Heights, Illinois, there are 43.6 snowfall days, and 17.95" (456mm) of snow is accumulated.
What is the month with the least sunshine in Prospect Heights?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Prospect Heights.
When is Daylight Saving Time (DST) in Prospect Heights?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Prospect 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 wettest month in Prospect Heights?
May is the month with the most rainfall in Prospect Heights, Illinois. Rain falls for 18 days and accumulates 3.9" (99mm) of precipitation.
When it does not snow in Prospect Heights?
In Prospect Heights, Illinois, snow does not fall in June through September.
When are the longest days in Prospect Heights?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What are the months with the highest UV index in Prospect Heights?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Prospect Heights, Illinois.
What is the hottest time of year in Prospect Heights?
July proves to be the warmest month in Prospect Heights, recording an average peak temperature of 81.1°F (27.3°C) and a minimum temperature of 66.4°F (19.1°C).
What month has the most sunshine in Prospect Heights?
July has the most sunshine of the year in Prospect Heights, with an average of 10.2h of sunshine.
What is the least humid month in Prospect Heights?
The least humid month in Prospect Heights, Illinois, is October, with an average relative humidity of 72%.
What is the driest month in Prospect Heights?
The month with the least rainfall is December, when the rain falls for 8.5 days and typically collects 1.46" (37mm) of precipitation.
What is the month with the shortest days in Prospect Heights?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
What is the month with the lowest UV index in Prospect Heights?
December is the month with the lowest UV index in Prospect Heights, with an average maximum UV index of 1.
Average temperature
Prospect Heights, 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 (28.2°F).
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure
Prospect 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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"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
Prospect Heights, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.2mph - Average wind speed in March:
9.7mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Prospect Heights, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Prospect Heights, IL
- Average rainfall in January:
1.65" - Average rainfall in February:
1.61" - Average rainfall in March:
1.85" - Average rainfall in April:
3.54" - Average rainfall in May:
3.9" - Average rainfall in June:
3.66"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.87" - Average rainfall in September:
2.24" - Average rainfall in October:
2.6" - Average rainfall in November:
1.57" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.46").
Average rainfall days
Prospect Heights, IL
- Average rainfall days in January:
7 days - Average rainfall days in February:
5.6 days - Average rainfall days in March:
11 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
13.9 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.6 days).
Average snowfall
Prospect Heights, IL
- Average snowfall in January:
4.96" - Average snowfall in February:
4.41" - Average snowfall in March:
1.38" - Average snowfall in April:
2.52" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Prospect Heights, IL
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
10.2 days - Average snowfall days in March:
5.8 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:
0.5 days - Average snowfall days in November:
3.8 days - Average snowfall days in December:
9.5 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Prospect Heights, IL
- Average daylight in January:
9h and 3min - 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 4min - 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 12min).
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 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Prospect Heights, IL
- Average sunshine days in January:
13.6 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
12.4 days - Average sunshine days in September:
14.1 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (10.7 days).
Average UV index
Prospect Heights, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Prospect Heights, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Prospect Heights, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Prospect Heights, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
