August weather forecastLisle, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Lisle, Illinois, with an average temperature ranging between min 64°F (17.8°C) and max 80.4°F (26.9°C).Temperature
Stepping into August, Lisle records an average high-temperature of a still moderately hot 80.4°F (26.9°C), almost consistent with July. In August, Lisle records an average nighttime temperature of 64°F (17.8°C).Humidity
The average relative humidity in August is 77%.Rainfall
In Lisle, during August, the rain falls for 16.6 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Lisle, during the entire year, the rain falls for 147.7 days and collects up to 23.43" (595mm) of precipitation.Snowfall
In Lisle, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 49min.On the first day of August, sunrise is at 5:47 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:26 pm CDT.
Sunshine
The month with the most sunshine is August, 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 vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 6 in August transforms into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Lisle, IL
- Average high temperature in August: 80.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in August: 64°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in August
Lisle, 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).
Average wind speed in August
Lisle, IL
- Average wind speed in August: 6mph
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 August
Lisle, IL
- Average humidity in August: 77%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Lisle, IL
- Average rainfall in August: 2.6"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in August
Lisle, IL
- Average rainfall days in August: 16.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in August
Lisle, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Lisle, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Lisle, IL
- Average daylight in August: 13h and 48min
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).
Average sunshine days in August
Lisle, IL
- Average sunshine days in August: 10.7 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in August
Lisle, 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).
Average cloud cover in August
Lisle, 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).
Average visibility in August
Lisle, IL
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
