Evanston
Illinois, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Evanston, IL

January, the same as December, in Evanston, Illinois, is another subzero cold winter month, with average temperature ranging between max 29.1°F (-1.6°C) and min 20.5°F (-6.4°C). The coldest month is January, 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 »

The last month of the winter, February, is another freezing cold month in Evanston, 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). In Evanston, the average high-temperature is relatively the same as in January - a still freezing cold 31.8°F (-0.1°C). Weather in February »

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

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

May, the last month of the spring, in Evanston, is a mild month, with average temperature fluctuating 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 »

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

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

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

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

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

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

The first month of the winter, December, is still a cold month in Evanston, Illinois, with average temperature varying between 27.5°F (-2.5°C) and 35.4°F (1.9°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 »

What is the coldest month in Evanston?

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

What is the most humid month in Evanston?

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

How many days does it rain in Evanston?

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

When does it snow in Evanston?

January through April, October through December are months with snowfall in Evanston, Illinois.

How much does it snow in Evanston?

Throughout the year, in Evanston, there are 40.5 snowfall days, and 12.76" (324mm) of snow is accumulated.

When does it snow the most in Evanston?

The month with the most snowfall in Evanston is January when snow falls for 11.6 days and typically aggregates up to 3.58" (91mm) of snow.

What is the month with the least sunshine in Evanston?

The month with the least sunshine is January, with an average of 3.6h of sunshine.

When it does not snow in Evanston?

In Evanston, Illinois, snow does not fall in May through September.

What is the wettest month in Evanston?

The month with the most rainfall 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 Evanston?

With an average of 15.2h of daylight, June has the longest days of the year.

What are the months with the highest UV index in Evanston?

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

What are the months with the most sunshine in Evanston?

July and August, with an average of 10.6h of sunshine, are months with the most sunshine in Evanston, Illinois.

What is the warmest month in Evanston?

August is the warmest month, 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?

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

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?

With an average of 9.2h of daylight, December has the shortest days of the year.

When is the lowest UV index in Evanston?

With an average maximum UV index of 1, December is the month with the lowest UV index in Evanston.
Average temperature - 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").

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).

Average snowfall - 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).

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).