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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
Climate and monthly weather forecast
Weather in January
January, the same as December, in Wilmette, Illinois, is a freezing cold winter month, with an average temperature ranging between min 20.5°F (-6.4°C) and max 29.1°F (-1.6°C). January is the coldest month, exhibiting average temperatures of 29.1°F (-1.6°C) at the peak and 20.5°F (-6.4°C) at the base. Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Wilmette, Illinois, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 22.8°F (-5.1°C). February registers an average high-temperature of a still subzero cold 31.8°F (-0.1°C), slightly varied from January's 29.1°F (-1.6°C). Weather in February »
Weather in March
March, the first month of the spring in Wilmette, is a cold month, with temperature in the range of an average low of 32°F (0°C) and an average high of 40.8°F (4.9°C). The shift from February to March sees an increase in the average high-temperature, transitioning from a freezing cold 31.8°F (-0.1°C) to a cold 40.8°F (4.9°C). Weather in March »
Weather in April
April in Wilmette, Illinois, is a chilly spring month, with an average temperature fluctuating between 39.7°F (4.3°C) and 49.8°F (9.9°C). Wilmette's weather in April presents a rise in the average high-temperature, moving from a cold 40.8°F (4.9°C) in March to a frosty 49.8°F (9.9°C). Weather in April »
Weather in May
May, the last month of the spring in Wilmette, is a mild month, with an average temperature fluctuating between 59.7°F (15.4°C) and 49.6°F (9.8°C). The shift from April to May brings an increase in the average high-temperature, moving from a chilly 49.8°F (9.9°C) to a moderate 59.7°F (15.4°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Wilmette, Illinois, with an average temperature varying between 69.6°F (20.9°C) and 59.9°F (15.5°C). Wilmette in June sees a temperature change, with average high-temperatures moving from a refreshing 59.7°F (15.4°C) in May to a pleasant 69.6°F (20.9°C). Weather in June »
Weather in July
July in Wilmette, Illinois, is a warm summer month, with an average temperature varying between 76.8°F (24.9°C) and 68°F (20°C). July's onset brings a subtle temperature rise, moving from a pleasant 69.6°F (20.9°C) in June to a moderately hot 76.8°F (24.9°C). Weather in July »
Weather in August
August, the last month of the summer in Wilmette, is another warm month, with temperature in the range of an average low of 68°F (20°C) and an average high of 77°F (25°C). August temperatures tend to peak at an average high of 77°F (25°C) and dip to a low of 68°F (20°C). Weather in August »
Weather in September
September, the first month of the autumn in Wilmette, is also an agreeable month, with an average temperature fluctuating between 70.7°F (21.5°C) and 61.7°F (16.5°C). A modest decline in the average high-temperature is seen during September, decreasing from a moderately hot 77°F (25°C) in August to an agreeable 70.7°F (21.5°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Wilmette, Illinois, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 58.6°F (14.8°C). As Wilmette enters October, the average high-temperature decreases from the an agreeable 70.7°F (21.5°C) of September to a refreshing 58.6°F (14.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Wilmette, Illinois, with an average temperature fluctuating between 45.9°F (7.7°C) and 36.7°F (2.6°C). November brings a decrease in the average high-temperature, shifting from a refreshing 58.6°F (14.8°C) in October to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Wilmette, is also a wintry month, with an average temperature varying between 35.4°F (1.9°C) and 27.5°F (-2.5°C). In December, the meteorological conditions alter, with the average high-temperature shifting from a frosty 45.9°F (7.7°C) in November to a wintry 35.4°F (1.9°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 is the coldest month in Wilmette?
January is the coldest month of the year in Wilmette, registering average temperatures as high as 29.1°F (-1.6°C) and as low as 20.5°F (-6.4°C).
What is the most humid month in Wilmette?
With an average relative humidity of 82%, January is the most humid month.
How much does it rain in Wilmette?
In Wilmette, Illinois, during the entire year, the rain falls for 154.1 days and collects up to 33.31" (846mm) of precipitation.
When does it snow in Wilmette?
Months with snowfall are January through April, October through December.
What is the snowiest month in Wilmette?
January is the month with the most snowfall in Wilmette, Illinois. Snow falls for 11.6 days and accumulates 3.58" (91mm) of snow.
How much does it snow in Wilmette?
In Wilmette, Illinois, during the entire year, snow falls for 40.5 days and aggregates up to 12.76" (324mm) of snow.
What is the month with the least sunshine in Wilmette?
With an average of 3.6h of sunshine, January has the least sunshine of the year.
When is Daylight Saving Time (DST) in Wilmette?
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.
When it does not snow in Wilmette?
May through September are months without snowfall in Wilmette, Illinois.
What is the wettest month in Wilmette?
The month with the most rainfall in Wilmette is June, when the rain falls for 16.7 days and typically aggregates up to 4.49" (114mm) of precipitation.
When are the longest days in Wilmette?
June has the longest days of the year in Wilmette, with an average of 15h and 12min of daylight.
What are the months with the highest UV index in Wilmette?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the month with the most sunshine in Wilmette?
The months with the most sunshine are July and August, with an average of 10.6h of sunshine.
What month is the hottest in Wilmette?
August is the warmest month of the year in Wilmette, Illinois, registering average temperatures as high as 77°F (25°C) and as low as 68°F (20°C).
What is the least humid month in Wilmette?
The least humid month in Wilmette is October, with an average relative humidity of 73%.
What is the driest month in Wilmette?
The month with the least rainfall is December, when the rain falls for 7.9 days and typically collects 1.38" (35mm) of precipitation.
What is the month with the shortest days in Wilmette?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
When is the lowest UV index in Wilmette?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Wilmette, IL
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is January (29.1°F).
The months with the highest average low temperature are July and August (68°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Wilmette, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"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 (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Wilmette, IL
- Average wind speed in January:
12.7mph - Average wind speed in February:
12.1mph - Average wind speed in March:
11.2mph - Average wind speed in April:
11.3mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8mph - Average wind speed in August:
8mph - Average wind speed in September:
9.6mph - Average wind speed in October:
11.5mph - Average wind speed in November:
12.3mph - Average wind speed in December:
11.9mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity
Wilmette, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Wilmette, IL
- Average rainfall in January:
1.61" - Average rainfall in February:
1.54" - Average rainfall in March:
1.81" - Average rainfall in April:
3.39" - Average rainfall in May:
4.41" - Average rainfall in June:
4.49"
- Average rainfall in July:
3.7" - Average rainfall in August:
3.54" - Average rainfall in September:
3.11" - Average rainfall in October:
2.72" - Average rainfall in November:
1.61" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days
Wilmette, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
5.6 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
14.9 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
7.9 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall
Wilmette, IL
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Wilmette, IL
- Average snowfall days in January:
11.6 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
2 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:
3.7 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Wilmette, 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 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Wilmette, IL
- Average sunshine days in January:
12 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
13 days - Average sunshine days in October:
13.5 days - Average sunshine days in November:
15.1 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is December (15.3 days).
The months with the least sunshine days are June and July (10.9 days).
Average UV index
Wilmette, 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
Wilmette, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Wilmette, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).