August weather forecastLong Grove, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Long Grove, Illinois, with an average temperature varying between 79.7°F (26.5°C) and 64.9°F (18.3°C).Temperature
The beginning of August records an average high-temperature of a still moderately hot 79.7°F (26.5°C), almost echoing the conditions of the previous month. Long Grove anticipates an average minimum temperature of 64.9°F (18.3°C) in the month of August.Humidity
The average relative humidity in August is 76%.Rainfall
In Long Grove, during August, the rain falls for 16.1 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Long Grove, during the entire year, the rain falls for 154.2 days and collects up to 28.94" (735mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in August is 13h and 50min.On the first day of August, sunrise is at 5:45 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 10.3h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In August, the UV index of 6 transforms into the following advice:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Long Grove, IL
- Average high temperature in August: 79.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in August: 64.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in August
Long Grove, 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
Long Grove, IL
- Average wind speed in August: 6.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in August
Long Grove, IL
- Average humidity in August: 76%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Long Grove, IL
- Average rainfall in August: 2.8"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is December (1.34").
Average rainfall days in August
Long Grove, IL
- Average rainfall days in August: 16.1 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in August
Long Grove, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Long Grove, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Long Grove, 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 18min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Long Grove, IL
- Average sunshine days in August: 12.8 days
The month with the most sunshine days is November (15.7 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in August
Long Grove, 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 December (UV index 1).
Average cloud cover in August
Long Grove, IL
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in August
Long Grove, 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).
