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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, the same as December, in West Chicago, Illinois, is another subzero cold winter month, with an average temperature varying between 27.9°F (-2.3°C) and 16.2°F (-8.8°C). In West Chicago, the month of January registers the lowest temperatures, averaging 27.9°F (-2.3°C) at the peak and 16.2°F (-8.8°C) at the lowest. Weather in January »
Weather in February
February, the last month of the winter in West Chicago, is another freezing cold month, with temperature in the range of an average low of 19°F (-7.2°C) and an average high of 31.8°F (-0.1°C). The unfolding of February shows an average high-temperature of a still freezing cold 31.8°F (-0.1°C), indicating a slight variance from January's 27.9°F (-2.3°C). Weather in February »
Weather in March
March, the first month of the spring in West Chicago, is a frosty month, with temperature in the range of an average low of 30.6°F (-0.8°C) and an average high of 44.8°F (7.1°C). The start of March signals an increase in the average high-temperature, moving from a freezing cold 31.8°F (-0.1°C) in February to a frosty 44.8°F (7.1°C). Weather in March »
Weather in April
April in West Chicago, Illinois, is a refreshing spring month, with an average temperature varying between 56.1°F (13.4°C) and 40.1°F (4.5°C). Entering April, West Chicago sees a temperature rise, with the average high-temperature advancing from March's chilly 44.8°F (7.1°C) to a refreshing 56.1°F (13.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in West Chicago, Illinois, with an average temperature ranging between min 51.4°F (10.8°C) and max 68.2°F (20.1°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a refreshing 56.1°F (13.4°C) in April to a pleasant 68.2°F (20.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in West Chicago, Illinois, with an average temperature ranging between min 60.1°F (15.6°C) and max 77.5°F (25.3°C). West Chicago's transition into June is marked by a rise in the average high-temperature, advancing from a pleasant 68.2°F (20.1°C) in May to a warm 77.5°F (25.3°C). Weather in June »
Weather in July
July, like June, in West Chicago, Illinois, is a moderately hot summer month, with an average temperature ranging between min 64.2°F (17.9°C) and max 81°F (27.2°C). The temperatures reach their highest averages in July, with highs of 81°F (27.2°C) and lows of 64.2°F (17.9°C). For most parts of July, the heat index is calculated to be a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in West Chicago, Illinois, with an average temperature ranging between min 62.8°F (17.1°C) and max 79.5°F (26.4°C). West Chicago's shift into August sets the average high-temperature at a still moderately hot 79.5°F (26.4°C), a figure that deviates only slightly from July's 81°F (27.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in West Chicago, Illinois, with an average temperature ranging between max 73.4°F (23°C) and min 56.5°F (13.6°C). During the shift to September, West Chicago records a mild decrease in average high-temperature, moving from a moderately hot 79.5°F (26.4°C) in August to a still warm 73.4°F (23°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in West Chicago, Illinois, with an average temperature ranging between max 60.3°F (15.7°C) and min 44.8°F (7.1°C). With the beginning of October, the average high-temperature shows a decrease, transitioning from a moderately hot 73.4°F (23°C) in September to a mild 60.3°F (15.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in West Chicago, Illinois, with an average temperature fluctuating between 45.5°F (7.5°C) and 32.7°F (0.4°C). A distinct shift in the average high-temperature is signaled in November, moving down from a moderate 60.3°F (15.7°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in West Chicago, is still a cold month, with an average temperature varying between 34.2°F (1.2°C) and 23.5°F (-4.7°C). December shows a mild decline in the average high-temperature, falling from November's frosty 45.5°F (7.5°C) to a cold 34.2°F (1.2°C). Weather in December »
Updated: Aug 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 is the coldest month?
In West Chicago, January is known for its average lowest temperatures, reaching a high of 27.9°F (-2.3°C) and a low of 16.2°F (-8.8°C).
What is the most humid month?
The months with the highest humidity are January and February, with an average relative humidity of 83%.
How much does it rain?
Throughout the year, there are 101.9 rainfall days, and 8.58" (218mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 7.6 days and accumulates 1.14" (29mm) of snow.
How much does it snow?
In West Chicago, during the entire year, snow falls for 28.3 days and aggregates up to 3.74" (95mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.7h of sunshine.
What is the month with the lowest UV index in West Chicago?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST)?
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 wettest month?
May is the month with the most rainfall. Rain falls for 12.4 days and accumulates 1.26" (32mm) of precipitation.
When it does not snow?
In West Chicago, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
West Chicago registers the average highest temperatures during July, with peaks of 81°F (27.2°C) and lows of 64.2°F (17.9°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 9.9h of sunshine.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month.
What is the driest month?
November and December are months with the least rain when the rain falls for 5.1 days and typically aggregates up to 0.39" (10mm) of rain.
What is the month with the shortest days?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
West Chicago, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°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 (16.2°F).
Average pressure
West Chicago, 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"Hg - Average pressure in November:
30.09"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
West Chicago, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
West Chicago, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
West Chicago, IL
- Average rainfall in January:
0.43" - Average rainfall in February:
0.43" - Average rainfall in March:
0.47" - Average rainfall in April:
0.98" - Average rainfall in May:
1.26" - Average rainfall in June:
1.06"
- Average rainfall in July:
0.98" - Average rainfall in August:
0.67" - Average rainfall in September:
0.71" - Average rainfall in October:
0.79" - Average rainfall in November:
0.39" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").
Average rainfall days
West Chicago, IL
- Average rainfall days in January:
3.4 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
12.4 days - Average rainfall days in June:
12.3 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
10.6 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).
Average snowfall
West Chicago, IL
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
West Chicago, IL
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
1.2 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:
0.3 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
5.6 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
West Chicago, IL
- Average daylight in January:
9h and 3min - 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 1min - Average sunshine in April:
7h and 3min - 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:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
West Chicago, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
19.5 days - Average sunshine days in April:
15.6 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
20.8 days - Average sunshine days in November:
22.2 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).
Average UV index
West Chicago, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
West Chicago, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
West Chicago, 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).
West Chicago, Illinois, USA
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