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 Lemont, Illinois, with an average temperature varying between 28.8°F (-1.8°C) and 17.1°F (-8.3°C). Lemont experiences its lowest average temperatures in January, reaching a peak of 28.8°F (-1.8°C) and a minimum of 17.1°F (-8.3°C). Weather in January »
Weather in February
February, the last month of the winter in Lemont, is a cold month, with an average temperature fluctuating between 19.9°F (-6.7°C) and 32.5°F (0.3°C). Lemont notes an average high-temperature of a cold 32.5°F (0.3°C) in February, hardly diverging from January. Weather in February »
Weather in March
March, the first month of the spring in Lemont, is a chilly month, with an average temperature varying between 45.7°F (7.6°C) and 32°F (0°C). Lemont's transition into March is marked by a rise in the average high-temperature, advancing from an icy 32.5°F (0.3°C) in February to a chilly 45.7°F (7.6°C). Weather in March »
Weather in April
April in Lemont, Illinois, is a moderate spring month, with an average temperature ranging between min 41°F (5°C) and max 57°F (13.9°C). April's onset brings a rise in the average high-temperature, moving from a chilly 45.7°F (7.6°C) in March to a moderate 57°F (13.9°C). Weather in April »
Weather in May
May, the last month of the spring in Lemont, is an agreeable month, with temperature in the range of an average low of 52.3°F (11.3°C) and an average high of 69.4°F (20.8°C). With the transition into May, Lemont experiences an increase in average high-temperatures, moving up from a mild 57°F (13.9°C) in April to an agreeable 69.4°F (20.8°C). Weather in May »
Weather in June
June, the first month of the summer in Lemont, is a moderately hot month, with an average temperature ranging between min 61.3°F (16.3°C) and max 78.6°F (25.9°C). The shift into June is marked by a rise in the average high-temperature, moving from May's agreeable 69.4°F (20.8°C) to a warm 78.6°F (25.9°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Lemont, Illinois, with an average temperature ranging between max 81.9°F (27.7°C) and min 65.7°F (18.7°C). Lemont records the warmest temperatures in July, averaging a high of 81.9°F (27.7°C) and a low of 65.7°F (18.7°C). During July, the heat index is calculated to be 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 Lemont, Illinois, with an average temperature fluctuating between 80.2°F (26.8°C) and 63.9°F (17.7°C). August's commencement is accompanied by an average high-temperature of a still warm 80.2°F (26.8°C), diverging marginally from July's 81.9°F (27.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Lemont, Illinois, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 57.4°F (14.1°C). As September arrives, Lemont's weather displays a minor decrease in high-temperatures, transitioning from August's moderately hot 80.2°F (26.8°C) to a still warm 74.3°F (23.5°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Lemont, Illinois, with an average temperature varying between 60.6°F (15.9°C) and 45.5°F (7.5°C). In Lemont, entering October brings a temperature decrement, reducing from September's moderately hot 74.3°F (23.5°C) to a refreshing 60.6°F (15.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Lemont, is also a frosty month, with an average temperature fluctuating between 33.4°F (0.8°C) and 46.6°F (8.1°C). The arrival of November signals a shift in temperature, down from a mild 60.6°F (15.9°C) in October to a chilly 46.6°F (8.1°C). Weather in November »
Weather in December
December, the first month of the winter in Lemont, is also a wintry month, with an average temperature varying between 34.7°F (1.5°C) and 24.6°F (-4.1°C). With the onset of December, Lemont's average high-temperature adjusts, receding from November's chilly 46.6°F (8.1°C) to a wintry 34.7°F (1.5°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Lemont?
Lemont's coldest month, January, generally records average temperatures ranging from a high of 28.8°F (-1.8°C) to a low of 17.1°F (-8.3°C).
What is the most humid month in Lemont?
The months with the highest humidity are January and February, with an average relative humidity of 83%.
How much does it rain in Lemont?
In Lemont, Illinois, during the entire year, the rain falls for 145.4 days and collects up to 22.83" (580mm) of precipitation.
When does it snow in Lemont?
Months with snowfall in Lemont, Illinois, are January through May, October through December.
When does it snow the most in Lemont?
January is the month with the most snowfall. Snow falls for 12.1 days and accumulates 3.11" (79mm) of snow.
How much does it snow in Lemont?
In Lemont, during the entire year, snow falls for 44.4 days and aggregates up to 11.93" (303mm) of snow.
What is the month with the least sunshine in Lemont?
January has the least sunshine of the year in Lemont, with an average of 3.8h of sunshine.
When is Daylight Saving Time (DST) in Lemont?
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 rainiest month in Lemont?
May is the month with the most rainfall in Lemont. Rain falls for 16.4 days and accumulates 2.83" (72mm) of precipitation.
When it does not snow in Lemont?
In Lemont, Illinois, snow does not fall in June through September.
When are the longest days in Lemont?
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 Lemont?
The months with the highest UV index in Lemont, Illinois, are June through August, with an average maximum UV index of 6.
What time of the year is the hottest in Lemont?
Lemont's July weather, with an average high temperature of 81.9°F (27.7°C) and an average low temperature of 65.7°F (18.7°C), tends to be the warmest of the year.
What are the months with the most sunshine in Lemont?
The months with the most sunshine in Lemont, Illinois, are July and August, with an average of 9.9h of sunshine.
What is the least humid month in Lemont?
With an average relative humidity of 73%, October is the least humid month.
What is the driest month in Lemont?
December is the month with the least rainfall in Lemont. Rain falls for 7.1 days and accumulates 1.06" (27mm) of precipitation.
What is the month with the shortest days in Lemont?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Lemont, Illinois.
What is the month with the lowest UV index in Lemont?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Lemont, IL
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°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 (17.1°F).
Average pressure
Lemont, 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
Lemont, IL
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.5mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.1mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Lemont, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Lemont, IL
- Average rainfall in January:
1.22" - Average rainfall in February:
1.18" - Average rainfall in March:
1.3" - Average rainfall in April:
2.4" - Average rainfall in May:
2.83" - Average rainfall in June:
2.72"
- Average rainfall in July:
2.72" - Average rainfall in August:
2.48" - Average rainfall in September:
1.77" - Average rainfall in October:
2.01" - Average rainfall in November:
1.14" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.06").
Average rainfall days
Lemont, IL
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
15 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Lemont, IL
The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Lemont, IL
- Average snowfall days in January:
12.1 days - Average snowfall days in February:
10.6 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
2.2 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:
3.1 days - Average snowfall days in December:
9.7 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Lemont, 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 5min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - 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:
9h and 5min - 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 months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Lemont, IL
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
10.8 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
16.2 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.3 days).
Average UV index
Lemont, 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
Lemont, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Lemont, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Lemont, 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
