August weather forecastDes Plaines, IL
August
Weather in August
August continues the summer season in Des Plaines and is almost idyllic with its warm and sunny weather. The high temperatures from July dip slightly, but it's hardly noticeable, presenting ideal conditions for outdoor activities. Despite a few rainy days, there’s plenty of sunshine, beckoning families to parks and tourists to outdoor attractions. As August ends, a subtle drop in temperature is observed, signaling the forthcoming arrival of September and the start of the autumn season. August stands as the gateway between the summer highs and autumn chills.Temperature
Des Plaines observes a minor difference in average high-temperatures between July's 80.6°F (27°C) and August's 79.3°F (26.3°C). An average nighttime temperature of 66.4°F (19.1°C) is observed during August.Humidity
In Des Plaines, the average relative humidity in August is 74%.Rainfall
In Des Plaines, in August, it is raining for 15.9 days, with typically 3.31" (84mm) of accumulated precipitation. In Des Plaines, during the entire year, the rain falls for 153.1 days and collects up to 32.01" (813mm) of precipitation.Snowfall
In Des Plaines, snow does not fall in June through September.Daylight
In Des Plaines, the average length of the day in August is 13h and 49min.On the first day of the month, sunrise is at 5:45 am and sunset at 8:09 pm. On the last day of August, sunrise is at 6:16 am and sunset at 7:26 pm CDT.
Sunshine
The months with the most sunshine are July and 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 of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: In August, the maximum UV index of 6 transforms into these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Des Plaines, IL
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in August: 66.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in August
Des Plaines, 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
Des Plaines, IL
- Average wind speed in August: 6.8mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in August
Des Plaines, IL
- Average humidity in August: 74%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Des Plaines, IL
- Average rainfall in August: 3.31"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days in August
Des Plaines, IL
- Average rainfall days in August: 15.9 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in August
Des Plaines, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Des Plaines, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Des Plaines, 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 months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Des Plaines, IL
- Average sunshine days in August: 12.8 days
The months with the most sunshine days are November and December (16.9 days).
The month with the least sunshine days is April (10.4 days).
Average UV index in August
Des Plaines, 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
Des Plaines, IL
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in August
Des Plaines, 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).
