June weather forecast
Naperville, IL

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A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois
A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois

Weather in June

June is the first month of summer, and the weather in Naperville shifts from mild to warm. With temperatures soaring to an average high of 78.4°F (25.8°C) and dipping to an average low of 61.3°F (16.3°C), summer is truly underway. The city fills with lively outdoor activities, taking advantage of the warm days and gentle evening breezes.

Temperature

Naperville in June sees a temperature change, with average high-temperatures moving from a pleasant 69.1°F (20.6°C) in May to a warm 78.4°F (25.8°C). The nights of June anticipate an average low-temperature of 61.3°F (16.3°C).

Humidity

In June, the average relative humidity is 78%.

Rainfall

In Naperville, in June, it is raining for 15.3 days, with typically 1.85" (47mm) of accumulated precipitation. In Naperville, during the entire year, the rain falls for 132.2 days and collects up to 16.22" (412mm) of precipitation.

Snowfall

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

Daylight

June has the longest days of the year, with an average of 15h and 12min of daylight.
On the first day of June, sunrise is at 5:19 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:31 pm CDT.

Sunshine

In Naperville, the average sunshine in June is 9.7h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during June translates into the following guidance:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average June temperature?

The high-temperature, in June, in Naperville, is 78.4°F (25.8°C), while the low-temperature averages to 61.3°F (16.3°C).

What is the average humidity in June?

The average relative humidity in June is 78%.

How many days does it rain in June?

In Naperville, in June, during 15.3 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

When it does not snow?

In Naperville, 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.

What is the average length of the day in June?

The average day length in June in Naperville is 15h and 10min.

When is the sunrise / sunset in June?

In June, on the first day of the month, sunrise is at 5:19 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:31 pm CDT.

How many hours of sunshine does Naperville have in June?

The average sunshine duration in June is 9.7h.

What are the months with the highest UV index?

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

How high is the UV index in June?

In June, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Naperville, IL

Average temperature in June - Naperville, IL
  • Average high temperature in June: 78.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in June: 61.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

Average pressure in June
Naperville, IL

Average pressure in June - Naperville, IL
  • Average pressure in June: 29.92"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 in June
Naperville, IL

Average wind speed in June - Naperville, IL
  • Average wind speed in June: 7.1mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in June
Naperville, IL

Average humidity in June - Naperville, IL
  • Average humidity in June: 78%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).

Average rainfall in June
Naperville, IL

Average rainfall in June - Naperville, IL
  • Average rainfall in June: 1.85"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.71").

Average rainfall days in June
Naperville, IL

Average rainfall days in June - Naperville, IL
  • Average rainfall days in June: 15.3 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.4 days).

Average snowfall in June
Naperville, IL

Average snowfall in June - Naperville, IL
  • Average snowfall in June: 0"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in June
Naperville, IL

Average snowfall days in June - Naperville, IL
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in June /
Average sunshine in June
Naperville, IL

Average daylight in June / Average sunshine in June - Naperville, IL
  • Average daylight in June: 15h 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 June: 9h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in June
Naperville, IL

Average sunshine days in June - Naperville, IL
  • Average sunshine days in June: 12.2 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (10.2 days).

Average UV index in June
Naperville, IL

Average UV index in June - Naperville, IL
  • Average UV index in June: 6

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 in June
Naperville, IL

Average cloud cover in June - Naperville, IL
  • Average cloud cover in June: 35

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).

Average visibility in June
Naperville, IL

Average visibility in June - Naperville, IL
  • Average visibility in June: 6mi

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).

Naperville, Illinois, USA

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