Climate and monthly weather forecastLee, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Lee, Illinois, with an average temperature fluctuating between 27°F (-2.8°C) and 14.7°F (-9.6°C). January is the coldest month, with the temperature often reaching an average high of 27°F (-2.8°C) and an average low of 14.7°F (-9.6°C). Weather in January »Weather in February
February, the last month of the winter in Lee, is also a subzero cold month, with an average temperature varying between 30.9°F (-0.6°C) and 18.1°F (-7.7°C). The average high-temperature during February is a still subzero cold 30.9°F (-0.6°C), almost matching the conditions of the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Lee, Illinois, with an average temperature varying between 44.4°F (6.9°C) and 30.4°F (-0.9°C). March's arrival signals a temperature shift, moving from a freezing cold 30.9°F (-0.6°C) in February to a chilly 44.4°F (6.9°C). Weather in March »Weather in April
April in Lee, Illinois, is a moderate spring month, with an average temperature fluctuating between 40.3°F (4.6°C) and 56.8°F (13.8°C). As March transitions into April, Lee sees a rise in the average high-temperature, moving from a chilly 44.4°F (6.9°C) to a mild 56.8°F (13.8°C). Weather in April »Weather in May
May, the last month of the spring in Lee, is a pleasant month, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 68.9°F (20.5°C). May indicates a change in the average high-temperature, moving up from a refreshing 56.8°F (13.8°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »Weather in June
June, the first month of the summer in Lee, is a moderately hot month, with an average temperature ranging between min 60.4°F (15.8°C) and max 77.5°F (25.3°C). As Lee, Illinois, welcomes June, the average high-temperature displays a subtle shift, adjusting from an agreeable 68.9°F (20.5°C) in May to a warm 77.5°F (25.3°C). Weather in June »Weather in July
July, like June, in Lee, Illinois, is another warm summer month, with an average temperature varying between 63.1°F (17.3°C) and 79.9°F (26.6°C). July, having an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63.1°F (17.3°C), is the warmest month. Weather in July »Weather in August
The last month of the summer, August, is another warm month in Lee, Illinois, with an average temperature ranging between min 61.2°F (16.2°C) and max 78.3°F (25.7°C). The arrival of August brings an average high-temperature of a still moderately hot 78.3°F (25.7°C), closely following the temperature pattern of July. Weather in August »Weather in September
September, the first month of the autumn in Lee, is also a moderately hot month, with an average temperature fluctuating between 54.5°F (12.5°C) and 73.4°F (23°C). Lee ushers in September with an average high-temperature of a still warm 73.4°F (23°C), showing a close resemblance to the previous month. Weather in September »Weather in October
October, the same as September, in Lee, Illinois, is another mild autumn month, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 44.2°F (6.8°C). October brings a decrease in the average high-temperature, shifting from a warm 73.4°F (23°C) in September to a refreshing 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 Lee, Illinois, with an average temperature ranging between min 32.2°F (0.1°C) and max 45.3°F (7.4°C). November's arrival witnesses a distinct drop in the average high-temperature, receding from October's moderate 59.9°F (15.5°C) to a chilly 45.3°F (7.4°C). Weather in November »Weather in December
December, the first month of the winter in Lee, is also a wintry month, with an average temperature ranging between min 22.8°F (-5.1°C) and max 32.9°F (0.5°C). The arrival of December corresponds with a reduction in the average high-temperature, down from November's frosty 45.3°F (7.4°C) to an icy 32.9°F (0.5°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
January, marked by an average high-temperature of 27°F (-2.8°C) and a low-temperature of 14.7°F (-9.6°C), is the coldest month.
The months with the highest humidity in Lee are January and July, with an average relative humidity of 85%.
In Lee, during the entire year, the rain falls for 124.5 days and collects up to 14.49" (368mm) of precipitation.
Months with snowfall in Lee are January through April, October through December.
The month with the most snowfall in Lee is January, when snow falls for 10.3 days and typically aggregates up to 2.2" (56mm) of snow.
In Lee, Illinois, during the entire year, snow falls for 37.1 days and aggregates up to 6.14" (156mm) of snow.
With an average of 3.6h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
February is the month with the least rainfall in Lee. Rain falls for 3.8 days and accumulates 0.55" (14mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lee, 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.
In Lee, Illinois, snow does not fall in May through September.
May through August, with an average maximum UV index of 5, are months with the highest UV index in Lee.
June is the month with the most rainfall. Rain falls for 16 days and accumulates 2.13" (54mm) of precipitation.
The month with the longest days in Lee is June, with an average of 15h and 12min of daylight.
With an average of 9.5h of sunshine, June has the most sunshine of the year.
Lee's July weather reaches an average high of 79.9°F (26.6°C) and an average low of 63.1°F (17.3°C), making it the warmest month.
The least humid month is October, with an average relative humidity of 74%.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Lee, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure
Lee, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"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:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Lee, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.4mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Lee, IL
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Lee, IL
- Average rainfall in January:
0.63" - Average rainfall in February:
0.55" - Average rainfall in March:
0.79" - Average rainfall in April:
1.5" - Average rainfall in May:
2.09" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.65" - Average rainfall in August:
1.26" - Average rainfall in September:
1.14" - Average rainfall in October:
1.26" - Average rainfall in November:
0.79" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days
Lee, IL
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
13.9 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall
Lee, IL
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Lee, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
5 days - Average snowfall days in April:
1 days - Average snowfall days in May:
0 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:
3.1 days - Average snowfall days in December:
7.7 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Lee, 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 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - 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 48min - Average daylight in December:
9h and 12min
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 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
9h and 24min - Average sunshine in August:
9h and 24min - Average sunshine in September:
8h and 36min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Lee, IL
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
15.7 days - Average sunshine days in March:
16.5 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.7 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index
Lee, IL
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Lee, IL
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility
Lee, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
