September weather forecastOakbrook Terrace, IL
September
Weather in September
September, the first month of the autumn in Oakbrook Terrace, is also a moderately hot month, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 74.1°F (23.4°C).Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from a moderately hot 81.1°F (27.3°C) in August to a still warm 74.1°F (23.4°C). Oakbrook Terrace anticipates an average minimum temperature of 58.1°F (14.5°C) in the month of September.Humidity
In Oakbrook Terrace, the average relative humidity in September is 74%.Rainfall
In Oakbrook Terrace, in September, it is raining for 13.2 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, there are 147.3 rainfall days, and 23.86" (606mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Oakbrook Terrace, Illinois.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Oakbrook Terrace, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine in Oakbrook Terrace is 8.7h.UV index
In Oakbrook Terrace, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 4 in September translates into this advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oakbrook Terrace, IL
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Oakbrook Terrace, IL
- Average pressure in September: 30.03"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 September
Oakbrook Terrace, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in September
Oakbrook Terrace, IL
- Average humidity in September: 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 September
Oakbrook Terrace, IL
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in September
Oakbrook Terrace, IL
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Oakbrook Terrace, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Oakbrook Terrace, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Oakbrook Terrace, IL
- Average daylight in September: 12h and 30min
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 September: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Oakbrook Terrace, IL
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Oakbrook Terrace, IL
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Oakbrook Terrace, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Oakbrook Terrace, IL
- Average visibility in September: 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).
