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, like December, is another subzero cold winter month in Clarendon Hills, Illinois, with an average temperature ranging between max 28.8°F (-1.8°C) and min 17.1°F (-8.3°C). January, with its high-temperature average of 28.8°F (-1.8°C) and a low-temperature average of 17.1°F (-8.3°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Clarendon Hills, Illinois, with an average temperature ranging between min 19.9°F (-6.7°C) and max 32.5°F (0.3°C). February records an average high-temperature of a wintry 32.5°F (0.3°C), indicating a minor variation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Clarendon Hills, is a chilly month, with an average temperature ranging between max 45.1°F (7.3°C) and min 31.5°F (-0.3°C). March's arrival sees a rise in the average high-temperature, jumping from February's cold 32.5°F (0.3°C) to a frosty 45.1°F (7.3°C). Weather in March »
Weather in April
April is a mild spring month in Clarendon Hills, Illinois, with an average temperature varying between 56.5°F (13.6°C) and 40.6°F (4.8°C). Clarendon Hills's transition into April is marked by a rise in the average high-temperature, advancing from a chilly 45.1°F (7.3°C) in March to a mild 56.5°F (13.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Clarendon Hills, Illinois, with an average temperature ranging between max 68.9°F (20.5°C) and min 52.2°F (11.2°C). With the onset of May, Clarendon Hills experiences a temperature shift, with the average high-temperature moving from a moderate 56.5°F (13.6°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Clarendon Hills, Illinois, with an average temperature varying between 78.3°F (25.7°C) and 61.7°F (16.5°C). The start of June is characterized by an increase in the average high-temperature, transitioning from an agreeable 68.9°F (20.5°C) in May to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, like June, in Clarendon Hills, Illinois, is another warm summer month, with an average temperature fluctuating between 82.4°F (28°C) and 66.4°F (19.1°C). July, marked by an average high-temperature of 82.4°F (28°C) and a low-temperature of 66.4°F (19.1°C), is the warmest month. Throughout July, the heat index is evaluated at a tropical 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Clarendon Hills, Illinois, with an average temperature varying between 81.1°F (27.3°C) and 64.8°F (18.2°C). Clarendon Hills's shift into August is marked by a subtle change to a still moderately hot 81.1°F (27.3°C) from July's 82.4°F (28°C) in temperature. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Clarendon Hills, Illinois, with an average temperature fluctuating between 57.9°F (14.4°C) and 74.3°F (23.5°C). September reveals a small adjustment in temperature, transitioning from an average high of 81.1°F (27.3°C) in August to a still moderately hot 74.3°F (23.5°C). Weather in September »
Weather in October
October, the same as September, in Clarendon Hills, Illinois, is another mild autumn month, with an average temperature varying between 60.6°F (15.9°C) and 45.7°F (7.6°C). Clarendon Hills's October weather features a mild decline in high-temperatures, reducing from a moderately hot 74.3°F (23.5°C) in September to a moderate 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Clarendon Hills, Illinois, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 45.7°F (7.6°C). The start of November is characterized by a significant decrease in the average high-temperature, moving from a refreshing 60.6°F (15.9°C) in October to a chilly 45.7°F (7.6°C). Weather in November »
Weather in December
December, the first month of the winter in Clarendon Hills, is still a cold month, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 34.5°F (1.4°C). The onset of December entails a temperature shift, as the average high-temperature decreases from a chilly 45.7°F (7.6°C) in November to a wintry 34.5°F (1.4°C). Weather in December »
Updated: Feb 12, 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 time of the year is the coldest in Clarendon Hills?
January is the month that records the lowest temperatures in Clarendon Hills, Illinois, with averages ranging from a high of 28.8°F (-1.8°C) to a low of 17.1°F (-8.3°C).
What are the most humid months in Clarendon Hills?
The months with the highest humidity in Clarendon Hills, Illinois, are January and February, with an average relative humidity of 82%.
How much does it rain in Clarendon Hills?
Throughout the year, in Clarendon Hills, there are 118.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.
When does it snow in Clarendon Hills?
January through April, October through December are months with snowfall in Clarendon Hills, Illinois.
How much does it snow in Clarendon Hills?
Throughout the year, there are 34.9 snowfall days, and 7.2" (183mm) of snow is accumulated.
What is the month with the least sunshine in Clarendon Hills?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Clarendon Hills, Illinois.
When is the lowest UV index in Clarendon Hills?
With an average maximum UV index of 1, January is the month with the lowest UV index.
When does it snow the most in Clarendon Hills?
February is the month with the most snowfall. Snow falls for 8.6 days and accumulates 2.28" (58mm) of snow.
When is Daylight Saving Time (DST) in Clarendon Hills?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Clarendon Hills, Illinois, 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 Clarendon Hills?
May is the month with the most rainfall in Clarendon Hills. Rain falls for 14.9 days and accumulates 1.97" (50mm) of precipitation.
When it does not snow in Clarendon Hills?
May through September are months without snowfall in Clarendon Hills, Illinois.
When are the longest days in Clarendon Hills?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Clarendon Hills?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year in Clarendon Hills?
Clarendon Hills records the warmest temperatures in July, averaging a high of 82.4°F (28°C) and a low of 66.4°F (19.1°C).
What month has the most sunshine in Clarendon Hills?
August has the most sunshine of the year in Clarendon Hills, Illinois, with an average of 10h of sunshine.
What is the least humid month in Clarendon Hills?
October is the least humid month, with an average relative humidity of 72%.
What is the driest month in Clarendon Hills?
The month with the least rainfall in Clarendon Hills is December, when the rain falls for 4.9 days and typically collects 0.63" (16mm) of precipitation.
What is the month with the shortest days in Clarendon Hills?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Clarendon Hills, IL
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°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 (17.1°F).
Average pressure
Clarendon Hills, 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:
30.09"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
Clarendon Hills, IL
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.2mph - Average wind speed in April:
9.4mph - Average wind speed in May:
8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Clarendon Hills, 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
Clarendon Hills, IL
- Average rainfall in January:
0.67" - Average rainfall in February:
0.71" - Average rainfall in March:
0.75" - Average rainfall in April:
1.38" - Average rainfall in May:
1.97" - Average rainfall in June:
1.61"
- Average rainfall in July:
1.61" - Average rainfall in August:
1.34" - Average rainfall in September:
1.18" - Average rainfall in October:
1.22" - Average rainfall in November:
0.67" - Average rainfall in December:
0.63"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").
Average rainfall days
Clarendon Hills, IL
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.2 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
5.9 days - Average rainfall days in December:
4.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).
Average snowfall
Clarendon Hills, IL
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Clarendon Hills, IL
- Average snowfall days in January:
9.7 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
1.4 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:
0.4 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
7.2 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Clarendon Hills, 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 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 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Clarendon Hills, IL
- Average sunshine days in January:
19.7 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).
Average UV index
Clarendon Hills, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Clarendon Hills, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Clarendon Hills, 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).
Clarendon Hills, 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