August weather forecast
Westmont, IL

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Weather in August

The last month of the summer, August, is another warm month in Westmont, Illinois, with an average temperature ranging between min 64.8°F (18.2°C) and max 81.1°F (27.3°C).

Temperature

August brings a marginal elevation to a still moderately hot 81.1°F (27.3°C) from July's 82.4°F (28°C) in Westmont's average high-temperatures. In August, the recorded average low-temperature is a refreshing 64.8°F (18.2°C).

Heat index

During August, the heat index is appraised at a hot 86°F (30°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

In August, the average relative humidity in Westmont is 75%.

Rainfall

In Westmont, in August, it is raining for 12.2 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 118.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 49min.
On the first day of the month, sunrise is at 5:46 am and sunset at 8:09 pm. On the last day of August, in Westmont, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

Sunshine

August has the most sunshine of the year in Westmont, with an average of 10h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

What is the average August temperature in Westmont?

In Westmont, 81.1°F (27.3°C) is the average high-temperature and 64.8°F (18.2°C) is the average low-temperature during August. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 86°F (30°C).

What is the average humidity in August in Westmont?

In August, the average relative humidity in Westmont, Illinois, is 75%.

How much does it rain in Westmont in August?

In August, in Westmont, the rain falls for 12.2 days. Throughout August, 1.34" (34mm) of precipitation is accumulated.

When it does not snow in Westmont?

In Westmont, snow does not fall in May through September.

What is the average length of the day in August in Westmont?

In Westmont, Illinois, the average day length in August is 13h and 49min.

When is the sunrise / sunset in August in Westmont?

On the first day of August in Westmont, sunrise is at 5:46 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

What month has the most sunshine in Westmont?

August has the most sunshine of the year, with an average of 10h of sunshine.

How long on average sun shines in August in Westmont?

In August, the average sunshine duration is 10h.

When is the highest UV index in Westmont?

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

How high is the UV index in August in Westmont?

In Westmont, Illinois, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high hazard to health 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 August
Westmont, IL

Average temperature in August - Westmont, IL
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in August: 64.8°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in August
Westmont, IL

Average pressure in August - Westmont, IL
  • Average pressure in August: 29.98"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).

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Average wind speed in August
Westmont, IL

Average wind speed in August - Westmont, IL
  • Average wind speed in August: 6.1mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in August
Westmont, IL

Average humidity in August - Westmont, IL
  • Average humidity in August: 75%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in August
Westmont, IL

Average rainfall in August - Westmont, IL
  • Average rainfall in August: 1.34"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").

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Average rainfall days in August
Westmont, IL

Average rainfall days in August - Westmont, IL
  • Average rainfall days in August: 12.2 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in August
Westmont, IL

Average snowfall in August - Westmont, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Westmont, IL

Average snowfall days in August - Westmont, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Westmont, IL

Average daylight in August / Average sunshine in August - Westmont, IL
  • Average daylight in August: 13h and 5min

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 August: 10h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in August
Westmont, IL

Average sunshine days in August - Westmont, IL
  • Average sunshine days in August: 14.8 days

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in August
Westmont, IL

Average UV index in August - Westmont, IL
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in August
Westmont, IL

Average cloud cover in August - Westmont, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in August
Westmont, IL

Average visibility in August - Westmont, IL
  • Average visibility in August: 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).

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Westmont, Illinois, USA

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