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

Monthly weather forecast and climate
Naperville, IL

The scenic view of a covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois, reflections in the below water
The scenic view of a covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois, reflections in the below water
January, the same as December, in Naperville, Illinois, is another subzero cold winter month, with average temperature ranging between max 30°F (-1.1°C) and min 15.1°F (-9.4°C). The coldest month is January, with an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 15.1°F (-9.4°C). Weather in January »
The last month of the winter, February, is a cold month in Naperville, Illinois, with average temperature varying between 18°F (-7.8°C) and 35.1°F (1.7°C). In February, the average high-temperature is essentially the same as in January - a cold 35.1°F (1.7°C). Weather in February »

The first month of the spring, March, is a chilly month in Naperville, Illinois, with average temperature varying between 27°F (-2.8°C) and 46.9°F (8.3°C). In Naperville, the average high-temperature rises, from a cold 35.1°F (1.7°C) in February, to a chilly 46.9°F (8.3°C). Weather in March »

April in Naperville, Illinois, is a mild spring month, with average temperature varying between 60.1°F (15.6°C) and 37°F (2.8°C). In Naperville, Illinois, the average high-temperature in April rises, from a frosty 46.9°F (8.3°C) in March, to a mild 60.1°F (15.6°C). Weather in April »

The last month of the spring, May, is a pleasant month in Naperville, Illinois, with average temperature fluctuating between 46°F (7.8°C) and 71.1°F (21.7°C). In May, the average high-temperature increases, from a moderate 60.1°F (15.6°C) in April, to an agreeable 71.1°F (21.7°C). Weather in May »

The first month of the summer, June, is a warm month in Naperville, Illinois, with average temperature fluctuating between 57°F (13.9°C) and 81°F (27.2°C). In June, the average high-temperature increases, from a pleasant 71.1°F (21.7°C) in May, to a moderately hot 81°F (27.2°C). Weather in June »

July, the same as June, is another warm summer month in Naperville, Illinois, with average temperature varying between 61°F (16.1°C) and 82.9°F (28.3°C). July is the warmest month, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 61°F (16.1°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Naperville, Illinois, with average temperature fluctuating between 81°F (27.2°C) and 60.1°F (15.6°C). In Naperville, Illinois, the average high-temperature is relatively the same as in July - a still moderately hot 81°F (27.2°C). Weather in August »

The first month of the autumn, September, is still a warm month in Naperville, Illinois, with average temperature varying between 75°F (23.9°C) and 51.1°F (10.6°C). In September, the average high-temperature slightly decreases, from a moderately hot 81°F (27.2°C) in August, to a still warm 75°F (23.9°C). Weather in September »

October, the same as September, is another comfortable autumn month in Naperville, Illinois, with average temperature fluctuating between 39.9°F (4.4°C) and 63°F (17.2°C). In October, the average high-temperature drops, from a warm 75°F (23.9°C) in September, to an enjoyable 63°F (17.2°C). Weather in October »

The last month of the autumn, November, is another chilly month in Naperville, Illinois, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 48°F (8.9°C). In Naperville, the average high-temperature plummets, from a comfortable 63°F (17.2°C) in October, to a chilly 48°F (8.9°C). Weather in November »

The first month of the winter, December, is also a wintry month in Naperville, Illinois, with average temperature fluctuating between 34°F (1.1°C) and 19°F (-7.2°C). In Naperville, the average high-temperature drops, from a chilly 48°F (8.9°C) in November, to a wintry 34°F (1.1°C). Weather in December »

What is the coldest month in Naperville?

The coldest month in Naperville is January, with an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 15.1°F (-9.4°C).

How much does it rain in Naperville?

Throughout the year, in Naperville, 37.7" (956.6mm) of rain is accumulated.

What is the driest month in Naperville?

January is the month with the least rainfall in Naperville, with 1.7" (42.9mm) of accumulated precipitation.

What is the wettest month in Naperville?

The month with the most rainfall in Naperville is June when 4.2" (106.9mm) of precipitation is typically aggregated.

When are the longest days in Naperville?

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

What is the warmest month in Naperville?

The warmest month is July, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 61°F (16.1°C).

What is the month with the shortest days in Naperville?

The month with the shortest days in Naperville, Illinois, is December, with an average of 9.2h of daylight.
Average rainfall - Naperville, IL
Average daylight - Naperville, IL

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