June weather forecast
Naperville, IL

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

The first month of the summer, June, is a warm month in Naperville, Illinois, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 78.4°F (25.8°C).

Temperature

In Naperville, the average high-temperature in June rises, from an agreeable 69.1°F (20.6°C) in May, to a warm 78.4°F (25.8°C). In June, in Naperville, the average low-temperature is 61.3°F (16.3°C).

Humidity

In Naperville, the average relative humidity in June is 78%.

Rainfall

In Naperville, during June, the rain falls for 15.3 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Naperville, during the entire year, the rain falls for 132.2 days and collects up to 16.22" (412mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

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

Sunshine

In Naperville, Illinois, the average sunshine is 9.7h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 in June interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in June in Naperville?

In June, the average relative humidity is 78%.

How much does it rain in Naperville 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?

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

When are the longest days in Naperville?

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

What is the average length of the day in June in Naperville?

The average length of the day in June in Naperville is 15.2h.

How long on average sun shines in June in Naperville?

The average sunshine in June is 9.7h.

What is the month with the highest UV index in Naperville?

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

What is the UV index intensity in June in Naperville?

In June, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.

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).

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Average pressure in June
Naperville, IL

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

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.92").

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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).

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Average humidity in June
Naperville, IL

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

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

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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").

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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).

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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").
Months with the least snowfall are May, June, July, August and September (0").

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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).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in June / Average sunshine in June - Naperville, IL
  • Average daylight in June: 15.2h

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

  • Average sunshine in June: 9.7h

Months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3.8h).

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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).

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Average UV index in June
Naperville, IL

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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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).
Months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in June
Naperville, IL

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

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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