June weather forecast
Williamsville, IL

Weather in June

The first month of the summer, June, is a warm month in Williamsville, Illinois, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 64.4°F (18°C).

Temperature

In Williamsville, the average high-temperature in June marginally rises from a pleasant 72.9°F (22.7°C) in May to a moderately hot 81.1°F (27.3°C). The average low-temperature, in Williamsville, is 64.4°F (18°C).

Heat index

The average heat index in June is calculated to be a tropical 86°F (30°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, pregnancy, clothing). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in June is 80%.

Rainfall

June is the month with the most rainfall in Williamsville. Rain falls for 14.6 days and accumulates 2.36" (60mm) of precipitation.

Snowfall

In Williamsville, snow does not fall in May through October.

Daylight

June has the longest days of the year, with an average of 14h and 58min of daylight.
On the first day of June, sunrise is at 5:31 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:32 am and sunset at 8:31 pm CDT.

Sunshine

June has the most sunshine of the year in Williamsville, with an average of 10.4h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Williamsville. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 6 in June transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in June in Williamsville?

In Williamsville, Illinois, in June, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 64.4°F (18°C). in June, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 86°F (30°C).

What is the average humidity in June in Williamsville?

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

What is the wettest month in Williamsville?

June is the month with the most rainfall in Williamsville, Illinois. Rain falls for 14.6 days and accumulates 2.36" (60mm) of precipitation.

How many days does it rain in June in Williamsville?

In June, in Williamsville, Illinois, the rain falls for 14.6 days. Throughout June, 2.36" (60mm) of precipitation is accumulated.

When it does not snow in Williamsville?

May through October are months without snowfall in Williamsville, Illinois.

When are the longest days in Williamsville?

The month with the longest days is June, with an average of 14h and 58min of daylight.

How many hours of daylight does Williamsville have in June?

In Williamsville, Illinois, the average day length in June is 14h and 58min.

What time are sunrise and sunset in June in Williamsville?

On the first day of June in Williamsville, sunrise is at 5:31 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:32 am and sunset at 8:31 pm CDT.

What month has the most sunshine in Williamsville?

With an average of 10.4h of sunshine, June has the most sunshine of the year in Williamsville, Illinois.

How many hours of sunshine does Williamsville have in June?

In Williamsville, the average sunshine duration in June is 10.4h.

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

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

What is the UV index reading in June in Williamsville?

The average daily maximum UV index in June in Williamsville is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe 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
Williamsville, IL

Average temperature in June - Williamsville, IL
  • Average high temperature in June: 81.1°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in June: 64.4°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

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Average pressure in June
Williamsville, IL

Average pressure in June - Williamsville, IL
  • Average pressure in June: 29.91"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in June
Williamsville, IL

Average wind speed in June - Williamsville, IL
  • Average wind speed in June: 7.3mph

The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

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Average humidity in June
Williamsville, IL

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

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in June
Williamsville, IL

Average rainfall in June - Williamsville, IL
  • Average rainfall in June: 2.36"

The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is December (0.83").

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Average rainfall days in June
Williamsville, IL

Average rainfall days in June - Williamsville, IL
  • Average rainfall days in June: 14.6 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in June
Williamsville, IL

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

The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in June
Williamsville, IL

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

The month with the highest number of snowfall days is January (8 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
Williamsville, IL

Average daylight in June / Average sunshine in June - Williamsville, IL
  • Average daylight in June: 15h and 0min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in June: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in June
Williamsville, IL

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

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in June
Williamsville, IL

Average UV index in June - Williamsville, 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, February, November and December (UV index 2).

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Average cloud cover in June
Williamsville, IL

Average cloud cover in June - Williamsville, IL
  • Average cloud cover in June: 30

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June, August and September (Cloud cover 30).

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Average visibility in June
Williamsville, IL

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

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

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