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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 a freezing cold winter month in Gerlaw, Illinois, with an average temperature ranging between min 17.6°F (-8°C) and max 29.7°F (-1.3°C). January, noted for its average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 17.6°F (-8°C), is considered the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Gerlaw, Illinois, with an average temperature ranging between max 34.9°F (1.6°C) and min 21.6°F (-5.8°C). The ushering in of February brings an average high-temperature of a wintry 34.9°F (1.6°C), closely mirroring the 29.7°F (-1.3°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Gerlaw, Illinois, with temperature in the range of an average high of 48°F (8.9°C) and an average low of 33.3°F (0.7°C). In March, the meteorological conditions change with the average high-temperature moving from a cold 34.9°F (1.6°C) in February to a chilly 48°F (8.9°C). Weather in March »
Weather in April
April in Gerlaw, Illinois, is a mild spring month, with an average temperature varying between 60.4°F (15.8°C) and 43.3°F (6.3°C). The transition from March to April brings a temperature rise, with average high-temperatures increasing from a frosty 48°F (8.9°C) to a refreshing 60.4°F (15.8°C). Weather in April »
Weather in May
May, the last month of the spring in Gerlaw, is an agreeable month, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 54.1°F (12.3°C). May's arrival coincides with a temperature rise, moving from April's mild 60.4°F (15.8°C) to an agreeable 70.9°F (21.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Gerlaw, Illinois, with an average temperature ranging between min 63.1°F (17.3°C) and max 79.5°F (26.4°C). Gerlaw's transition into June is marked by a minor temperature shift, moving from a pleasant 70.9°F (21.6°C) in May to a moderately hot 79.5°F (26.4°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Gerlaw, Illinois, with an average temperature ranging between min 64.9°F (18.3°C) and max 82°F (27.8°C). July is the warmest month of the year, registering average temperatures as high as 82°F (27.8°C) and as low as 64.9°F (18.3°C). For July, the heat index is computed to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Gerlaw, is also a moderately hot month, with an average temperature ranging between max 81.1°F (27.3°C) and min 63.3°F (17.4°C). Gerlaw, Illinois, marks the onset of August with an average high-temperature of a still warm 81.1°F (27.3°C), subtly divergent from July's 82°F (27.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Gerlaw, is also a moderately hot month, with an average temperature ranging between max 75.9°F (24.4°C) and min 56.3°F (13.5°C). The advent of September observes an average high-temperature of a still moderately hot 75.9°F (24.4°C), nearly identical to August's 81.1°F (27.3°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Gerlaw, Illinois, with an average temperature ranging between max 61.7°F (16.5°C) and min 45.9°F (7.7°C). October is characterized by a reduction in the average high-temperature, from a moderately hot 75.9°F (24.4°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Gerlaw, is another chilly month, with temperature in the range of an average low of 34°F (1.1°C) and an average high of 47.5°F (8.6°C). In Gerlaw, the average high-temperature in November drops from an enjoyable 61.7°F (16.5°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 Gerlaw, is still a cold month, with an average temperature ranging between min 24.6°F (-4.1°C) and max 35.6°F (2°C). Welcoming December, Gerlaw observes a shift in the average high-temperature, falling from November's chilly 47.5°F (8.6°C) to a cold 35.6°F (2°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 month is the coldest in Gerlaw?
Gerlaw, Illinois, notes the coldest temperatures in January, with a average high of 29.7°F (-1.3°C) and a low of 17.6°F (-8°C).
What is the driest month in Gerlaw?
The month with the least rainfall is January, when the rain falls for 5.9 days and typically collects 1.46" (37mm) of precipitation.
How much does it rain in Gerlaw?
Throughout the year, in Gerlaw, Illinois, there are 149.4 rainfall days, and 30.16" (766mm) of precipitation is accumulated.
When does it snow in Gerlaw?
January through April, October through December are months with snowfall in Gerlaw, Illinois.
When does it snow the most in Gerlaw?
January is the month with the most snowfall in Gerlaw, Illinois. Snow falls for 10.9 days and accumulates 4.61" (117mm) of snow.
How many days does it snow in Gerlaw?
Throughout the year, in Gerlaw, Illinois, there are 36.7 snowfall days, and 15.31" (389mm) of snow is accumulated.
What is the month with the least sunshine in Gerlaw?
January has the least sunshine of the year, with an average of 4.1h of sunshine.
When is the lowest UV index in Gerlaw?
With an average maximum UV index of 1, January is the month with the lowest UV index in Gerlaw.
When is Daylight Saving Time (DST) in Gerlaw?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Gerlaw, 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 Gerlaw?
May is the month with the most rainfall in Gerlaw. Rain falls for 19 days and accumulates 4.25" (108mm) of precipitation.
When it does not snow in Gerlaw?
May through September are months without snowfall.
When are the longest days in Gerlaw?
With an average of 15h and 6min of daylight, June has the longest days of the year in Gerlaw.
What month has the most sunshine in Gerlaw?
The month with the most sunshine is June, with an average of 10.1h of sunshine.
What are the months with the highest UV index in Gerlaw?
The months with the highest UV index in Gerlaw, Illinois, are June and July, with an average maximum UV index of 6.
What month is the hottest in Gerlaw?
July, with its average high-temperature of 82°F (27.8°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month.
What is the most humid month in Gerlaw?
The most humid month is July, with an average relative humidity of 84%.
What is the least humid month in Gerlaw?
With an average relative humidity of 71%, October is the least humid month in Gerlaw.
What is the month with the shortest days in Gerlaw?
With an average of 9h and 18min of daylight, December has the shortest days of the year in Gerlaw, Illinois.
Average temperature
Gerlaw, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure
Gerlaw, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Gerlaw, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Gerlaw, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Gerlaw, IL
- Average rainfall in January:
1.46" - Average rainfall in February:
1.73" - Average rainfall in March:
2.2" - Average rainfall in April:
3.35" - Average rainfall in May:
4.25" - Average rainfall in June:
3.58"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days
Gerlaw, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
13 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
19 days - Average rainfall days in June:
18.7 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
14 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall
Gerlaw, IL
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Gerlaw, IL
- Average snowfall days in January:
10.9 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
4.3 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:
0.4 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Gerlaw, 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 3min - 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 2min
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:
4h and 1min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Gerlaw, IL
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
14.4 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
12 days - Average sunshine days in May:
9.9 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
18 days - Average sunshine days in December:
16.6 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Gerlaw, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Gerlaw, IL
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Gerlaw, IL
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Gerlaw, Illinois, USA
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