Climate and monthly weather forecastLehigh, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Lehigh, Illinois, is a freezing cold winter month, with an average temperature varying between 18.3°F (-7.6°C) and 30°F (-1.1°C). In Lehigh, the month of January registers the lowest temperatures, averaging 30°F (-1.1°C) at the peak and 18.3°F (-7.6°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in Lehigh, is a cold month, with temperature in the range of an average low of 21.6°F (-5.8°C) and an average high of 34.2°F (1.2°C). Lehigh marks the start of February with an average high-temperature of an icy 34.2°F (1.2°C), hinting at a slight fluctuation from January's 30°F (-1.1°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Lehigh, Illinois, with an average temperature ranging between min 33.3°F (0.7°C) and max 47.3°F (8.5°C). As Lehigh enters March, the average high-temperature increases from the an icy 34.2°F (1.2°C) of February to a chilly 47.3°F (8.5°C). Weather in March »Weather in April
April is a mild spring month in Lehigh, Illinois, with an average temperature ranging between max 59.5°F (15.3°C) and min 43.5°F (6.4°C). Lehigh's April weather shows an increase in high-temperatures, moving from March's chilly 47.3°F (8.5°C) to a mild 59.5°F (15.3°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Lehigh, Illinois, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 54.1°F (12.3°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's moderate 59.5°F (15.3°C) to a pleasant 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Lehigh, Illinois, with an average temperature fluctuating between 79.3°F (26.3°C) and 62.2°F (16.8°C). The arrival of June introduces a minor uplift in high-temperatures, adjusting from an agreeable 71.2°F (21.8°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »Weather in July
July, like June, in Lehigh, Illinois, is another warm summer month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 64.2°F (17.9°C). July, known for its average high temperature of 81.1°F (27.3°C) and an average low temperature of 64.2°F (17.9°C), is the warmest month. The heat index value during July is estimated at a tropical 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Lehigh, is also a moderately hot month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 62.6°F (17°C). Lehigh's shift into August sets the average high-temperature at a still warm 79.7°F (26.5°C), a figure that deviates only slightly from July's 81.1°F (27.3°C). Weather in August »Weather in September
September, the first month of the autumn in Lehigh, is still a warm month, with temperature in the range of an average low of 57.2°F (14°C) and an average high of 75°F (23.9°C). September's arrival brings an average high-temperature of a still moderately hot 75°F (23.9°C), slightly deviating from August's 79.7°F (26.5°C). Weather in September »Weather in October
October, like September, in Lehigh, Illinois, is another comfortable autumn month, with an average temperature ranging between max 61.9°F (16.6°C) and min 46.8°F (8.2°C). Lehigh's progression into October includes a drop in the average high-temperature, from a warm 75°F (23.9°C) in September to an enjoyable 61.9°F (16.6°C). Weather in October »Weather in November
November, the last month of the autumn in Lehigh, is another chilly month, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 47.5°F (8.6°C). The shift into November is marked by a considerable temperature decrease, with the average high-temperature dropping from a refreshing 61.9°F (16.6°C) in October to a chilly 47.5°F (8.6°C). Weather in November »Weather in December
December, the first month of the winter in Lehigh, is also a wintry month, with an average temperature fluctuating between 36.3°F (2.4°C) and 26.1°F (-3.3°C). The transition into December involves a decrease in the average high-temperature, falling from a frosty 47.5°F (8.6°C) in November to an icy 36.3°F (2.4°C). Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Lehigh, 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 (30°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Lehigh, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"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:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Lehigh, IL
- Average wind speed in January:
10.2mph - Average wind speed in February:
10mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.6mph
The windiest months (with the highest average wind speed) are January and April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Lehigh, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Lehigh, IL
- Average rainfall in January:
1.14" - Average rainfall in February:
1.06" - Average rainfall in March:
1.5" - Average rainfall in April:
2.28" - Average rainfall in May:
3.27" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.4" - Average rainfall in August:
2.24" - Average rainfall in September:
1.57" - Average rainfall in October:
2.01" - Average rainfall in November:
1.18" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days
Lehigh, IL
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
11 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
7.3 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (5 days).
Average snowfall
Lehigh, IL
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Lehigh, IL
- Average snowfall days in January:
11.7 days - Average snowfall days in February:
9.1 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
1.4 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:
0.4 days - Average snowfall days in November:
2.7 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Lehigh, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - 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 18min
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 18min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 18min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Lehigh, IL
- Average sunshine days in January:
15.1 days - Average sunshine days in February:
14 days - Average sunshine days in March:
15 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
16.8 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.3 days).
Average UV index
Lehigh, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Lehigh, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Lehigh, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).





