Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
August temperatures tend to peak at an average high of 77°F (25°C) and dip to a low of 68°F (20°C).Humidity
In Wilmette, the average relative humidity in August is 75%.Rainfall
In Wilmette, in August, during 15.8 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. In Wilmette, Illinois, during the entire year, the rain falls for 154.1 days and collects up to 33.31" (846mm) of precipitation.Snowfall
In Wilmette, snow does not fall in May through September.Daylight
The average length of the day in August in Wilmette is 13h and 50min.On the first day of August in Wilmette, sunrise is at 5:45 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:25 pm CDT.
Sunshine
July and August, with an average of 10.6h of sunshine, are months with the most 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 estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 6 in August translates into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest in Wilmette?
What are August temperatures in Wilmette?
What is the average humidity in August in Wilmette?
How much does it rain in Wilmette in August?
When it does not snow in Wilmette?
How many hours of daylight does Wilmette have in August?
What time are sunrise and sunset in August in Wilmette?
What are the months with the most sunshine in Wilmette?
How long on average sun shines in August in Wilmette?
What is the month with the highest UV index in Wilmette?
What is the UV index intensity in August in Wilmette?
Average temperature in August
Wilmette, IL
- Average high temperature in August: 77°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in August: 68°F
The months with the highest average low temperature are July and August (68°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in August
Wilmette, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Wilmette, IL
- Average wind speed in August: 8mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in August
Wilmette, IL
- Average humidity in August: 75%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Wilmette, IL
- Average rainfall in August: 3.54"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days in August
Wilmette, IL
- Average rainfall days in August: 15.8 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in August
Wilmette, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Wilmette, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Wilmette, 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Wilmette, IL
- Average sunshine days in August: 12.6 days
The month with the most sunshine days is December (15.3 days).
The months with the least sunshine days are June and July (10.9 days).
Average UV index in August
Wilmette, 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
Wilmette, IL
- Average cloud cover in August: 27
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 27).
Average visibility in August
Wilmette, 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).
Wilmette, Illinois, USA
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