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 sea temperature 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
The highest temperatures in Chicago are recorded in August, with averages reaching a high of 77.5°F and a low of 67.6°F.Humidity
In Chicago, the average relative humidity in August is 76%.Rainfall
In Chicago, in August, during 17.3 rainfall days, 4.06" of precipitation is typically accumulated. In Chicago, Illinois, during the entire year, the rain falls for 160.2 days and collects up to 36.97" of precipitation.Snowfall
June through October are months without snowfall in Chicago.Ocean temperature
With an average ocean temperature of 73.9°F, August is the month with the warmest seawater in Chicago.Note: Swimming in 73.9°F water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 77°F and 82.4°F.)
Daylight
In August, the average length of the day in Chicago is 13h and 49min.On the first day of August in Chicago, sunrise is at 5:44 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:26 pm CDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.6h of sunshine.UV index
The months with the highest UV index in Chicago are July and August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 6 in August translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
FAQ
What time of the year is the hottest in Chicago?
What is the temperature in August in Chicago?
What is the average humidity in August in Chicago?
How many days does it rain in August in Chicago?
When it does not snow in Chicago?
What month is the ocean warmest in Chicago?
How warm is the water in August in Chicago?
What is the average length of the day in August in Chicago?
What time are sunrise and sunset in August in Chicago?
What is the month with the most sunshine in Chicago?
How many hours of sunshine does Chicago have in August?
What is the month with the highest UV index in Chicago?
What is the UV index intensity in August in Chicago?
Average temperature in August
Chicago, IL
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in August: 67.6°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in August
Chicago, 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
Chicago, IL
- Average wind speed in August: 7.8mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in August
Chicago, IL
- Average humidity in August: 76%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Chicago, IL
- Average rainfall in August: 4.06"
The wettest month (with the highest rainfall) is June (4.88").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in August
Chicago, IL
- Average rainfall days in August: 17.3 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in August
Chicago, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in August
Chicago, 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 sea temperature in August
Chicago, IL
- Average sea temperature in August: 73.9°F
The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).
Average daylight in August /
Average sunshine in August
Chicago, 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 42min).
Average sunshine days in August
Chicago, IL
- Average sunshine days in August: 9.8 days
The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in August
Chicago, IL
- Average UV index in August: 6
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Chicago, 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
Chicago, 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).
Chicago, Illinois, USA
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