Monthly weather forecast and climate
Evanston, IL

Weather in January

January, the same as December, in Evanston, Illinois, is another subzero cold winter month, with average temperature fluctuating between 29.1°F (-1.6°C) and 20.5°F (-6.4°C). January is the coldest month, with an average high-temperature of 29.1°F (-1.6°C) and an average low-temperature of 20.5°F (-6.4°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Evanston, Illinois, with temperature in the range of an average low of 22.8°F (-5.1°C) and an average high of 31.8°F (-0.1°C). In February, the average high-temperature is practically the same as in January - a still subzero cold 31.8°F (-0.1°C). Weather in February »

Weather in March

March, the first month of the spring, in Evanston, is a cold month, with average temperature varying between 32°F (0°C) and 40.8°F (4.9°C). In March, the average high-temperature increases, from a freezing cold 31.8°F (-0.1°C) in February, to a wintry 40.8°F (4.9°C). Weather in March »

Weather in April

April is a chilly spring month in Evanston, Illinois, with average temperature varying between 39.7°F (4.3°C) and 49.8°F (9.9°C). In Evanston, the average high-temperature rises, from a cold 40.8°F (4.9°C) in March, to a chilly 49.8°F (9.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in Evanston, Illinois, with average temperature varying between 49.6°F (9.8°C) and 59.7°F (15.4°C). In May, the average high-temperature rises, from a frosty 49.8°F (9.9°C) in April, to a mild 59.7°F (15.4°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Evanston, Illinois, with average temperature varying between 59.9°F (15.5°C) and 69.6°F (20.9°C). In Evanston, Illinois, the average high-temperature rises, from a moderate 59.7°F (15.4°C) in May, to an agreeable 69.6°F (20.9°C). Weather in June »

Weather in July

July is a moderately hot summer month in Evanston, Illinois, with average temperature varying between 68°F (20°C) and 76.8°F (24.9°C). In July, the average high-temperature marginally rises, from an agreeable 69.6°F (20.9°C) in June, to a warm 76.8°F (24.9°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Evanston, Illinois, with temperature in the range of an average high of 77°F (25°C) and an average low of 68°F (20°C). With an average high-temperature of 77°F (25°C) and an average low-temperature of 68°F (20°C), August is the warmest month. Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Evanston, Illinois, with average temperature varying between 70.7°F (21.5°C) and 61.7°F (16.5°C). In September, the average high-temperature slightly decreases, from a moderately hot 77°F (25°C) in August, to a pleasant 70.7°F (21.5°C). Weather in September »

Weather in October

October, the same as September, in Evanston, Illinois, is another mild autumn month, 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). In October, the average high-temperature drops, from a pleasant 70.7°F (21.5°C) in September, to a mild 58.6°F (14.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Evanston, is also a frosty month, with average temperature fluctuating between 45.9°F (7.7°C) and 36.7°F (2.6°C). In November, the average high-temperature decreases, from a mild 58.6°F (14.8°C) in October, to a frosty 45.9°F (7.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Evanston, Illinois, with average temperature varying between 35.4°F (1.9°C) and 27.5°F (-2.5°C). In Evanston, the average high-temperature in December decreases, from a chilly 45.9°F (7.7°C) in November, to a wintry 35.4°F (1.9°C). Weather in December »
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FAQ

What is the coldest month in Evanston?

With an average high-temperature of 29.1°F (-1.6°C) and an average low-temperature of 20.5°F (-6.4°C), January is the coldest month.

What is the most humid month in Evanston?

With an average relative humidity of 82%, January is the most humid month.

How much does it rain in Evanston?

Throughout the year, in Evanston, Illinois, there are 154.1 rainfall days, and 33.31" (846mm) of precipitation is accumulated.

When does it snow in Evanston?

Months with snowfall are January through April, October through December.

What is the snowiest month in Evanston?

January is the month with the most snowfall. Snow falls for 11.6 days and accumulates 3.58" (91mm) of snow.

How many days does it snow in Evanston?

In Evanston, 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 Evanston?

With an average of 3.6h of sunshine, January has the least sunshine of the year in Evanston, Illinois.

When it does not snow in Evanston?

May through September are months without snowfall in Evanston, Illinois.

What is the wettest month in Evanston?

June is the month with the most rainfall. Rain falls for 16.7 days and accumulates 4.49" (114mm) of precipitation.

When are the longest days in Evanston?

June has the longest days of the year in Evanston, Illinois, with an average of 15.2h of daylight.

When is the highest UV index in Evanston?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Evanston, Illinois.

What is the month with the most sunshine in Evanston?

Months with the most sunshine are July and August, with an average of 10.6h of sunshine.

What is the warmest month in Evanston?

The warmest month is August, with an average high-temperature of 77°F (25°C) and an average low-temperature of 68°F (20°C).

What is the least humid month in Evanston?

With an average relative humidity of 73%, October is the least humid month in Evanston, Illinois.

What is the driest month in Evanston?

December is the month with the least rainfall in Evanston, Illinois. Rain falls for 7.9 days and accumulates 1.38" (35mm) of precipitation.

What is the month with the shortest days in Evanston?

The month with the shortest days in Evanston is December, with an average of 9.2h of daylight.

What is the month with the lowest UV index in Evanston?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Evanston, IL

Average temperature - Evanston, 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).

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).

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Average pressure
Evanston, IL

Average pressure - Evanston, IL

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed
Evanston, IL

Average wind speed - Evanston, IL

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).

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Average rainfall
Evanston, IL

Average rainfall - Evanston, IL

The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is December (1.38").

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Average rainfall days
Evanston, IL

Average rainfall days - Evanston, IL

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).

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Average snowfall
Evanston, IL

Average snowfall - Evanston, IL

The month with the highest snowfall is January (3.58").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Evanston, IL

Average snowfall days - Evanston, IL

The month with the highest number of snowfall days is January (11.6 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Evanston, IL

Average daylight / Average sunshine - Evanston, IL

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

Months with the most sunshine are July and August (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 3.6h).

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Average sunshine days
Evanston, IL

Average sunshine days - Evanston, IL

The month with the most sunshine days is December (15.3 days).
Months with the least sunshine days are June and July (10.9 days).

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Average visibility
Evanston, IL

Average visibility - Evanston, IL

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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