June weather forecast
Joliet, IL

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A unique shot of cars, trees, and buildings along a street in the town of Joliet, Illinois
A unique shot of cars, trees, and buildings along a street in the town of Joliet, Illinois

Weather in June

The month of June in Joliet holds the promise of summer weather blooming vibrantly. With temperatures substantially elevated compared to May, June’s average high reaches 79.2°F (26.2°C) maintaining a warm setting. This period is associated with elongated days, soaking in the maximum amount of sunlight annually. The occurrence of rainfall dwindles moderately, but humidity levels rise, sometimes leading to sultry days.

Temperature

A slight uplift of average high-temperatures is noted in June, with temperatures adjusting from an agreeable 70.3°F (21.3°C) in May to a warm 79.2°F (26.2°C). June brings with it a nighttime average temperature of 61.3°F (16.3°C).

Humidity

In June, the average relative humidity in Joliet is 80%.

Rainfall

In Joliet, during June, the rain falls for 17.8 days and regularly aggregates up to 4.02" (102mm) of precipitation. In Joliet, during the entire year, the rain falls for 153.6 days and collects up to 32.72" (831mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The month with the longest days is June, with an average of 15h and 6min of daylight.
On the first day of June in Joliet, sunrise is at 5:20 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:30 pm CDT.

Sunshine

The average sunshine in June in Joliet, Illinois, is 9.5h.

UV index

The months with the highest UV index in Joliet are June and July, 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 radiation for ordinary individuals.
Note: The UV index of 6 during June translates into the following guidance:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the usual temperature for Joliet in June?

In Joliet, 79.2°F (26.2°C) is the average high-temperature and 61.3°F (16.3°C) is the average low-temperature during June.

What is the average humidity in June in Joliet?

The average relative humidity in June in Joliet, Illinois, is 80%.

How many days does it rain in June in Joliet?

In June, the rain falls for 17.8 days. Throughout June, 4.02" (102mm) of precipitation is accumulated.

When it does not snow in Joliet?

May through October are months without snowfall in Joliet.

When are the longest days in Joliet?

With an average of 15h and 6min of daylight, June has the longest days of the year in Joliet.

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

In Joliet, the average day length in June is 15h and 8min.

What time are sunrise and sunset in June in Joliet?

In June, on the first day of the month, sunrise is at 5:20 am and sunset at 8:20 pm. On the last day of the month, in Joliet, sunrise is at 5:22 am and sunset at 8:30 pm CDT.

How many hours of sunshine does Joliet have in June?

In June, the average sunshine duration is 9.5h.

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

June and July, with an average maximum UV index of 6, are months with the highest UV index in Joliet, Illinois.

How high is the UV index in June in Joliet?

The average daily maximum UV index in June in Joliet, Illinois, is 6. A UV Index 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
Joliet, IL

Average temperature in June - Joliet, IL
  • Average high temperature in June: 79.2°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.3°F).

  • Average low temperature in June: 61.3°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in June
Joliet, IL

Average pressure in June - Joliet, IL
  • Average pressure in June: 29.92"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in June
Joliet, IL

Average wind speed in June - Joliet, IL
  • Average wind speed in June: 7.2mph

The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in June
Joliet, IL

Average humidity in June - Joliet, IL
  • Average humidity in June: 80%

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

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Average rainfall in June
Joliet, IL

Average rainfall in June - Joliet, IL
  • Average rainfall in June: 4.02"

The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").

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Average rainfall days in June
Joliet, IL

Average rainfall days in June - Joliet, IL
  • Average rainfall days in June: 17.8 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in June
Joliet, IL

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

The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in June
Joliet, IL

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

The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in June / Average sunshine in June - Joliet, IL
  • Average daylight in June: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in June: 9h and 3min

The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in June
Joliet, IL

Average sunshine days in June - Joliet, IL
  • Average sunshine days in June: 10.4 days

The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).

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Average UV index in June
Joliet, IL

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

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in June
Joliet, IL

Average cloud cover in June - Joliet, IL
  • Average cloud cover in June: 36

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 34).

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Average visibility in June
Joliet, IL

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

The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).

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Joliet, Illinois, USA

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