September weather forecast
Oakbrook Terrace, IL

Weather in September

The first month of the autumn, September, is also a moderately hot month in Oakbrook Terrace, Illinois, with average temperature varying between 58.1°F (14.5°C) and 74.1°F (23.4°C).

Temperature

In Oakbrook Terrace, Illinois, the average high-temperature in September marginally drops, from 81.1°F (27.3°C) in August, to a still warm 74.1°F (23.4°C). The average low-temperature, in September, is 58.1°F (14.5°C).

Humidity

In September, the average relative humidity in Oakbrook Terrace, Illinois, is 74%.

Rainfall

In Oakbrook Terrace, in September, during 13.2 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in Oakbrook Terrace, 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

In Oakbrook Terrace, the average length of the day in September is 12.5h.

Sunshine

The average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index in Oakbrook Terrace is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Oakbrook Terrace?

In September, the average relative humidity in Oakbrook Terrace is 74%.

How many days does it rain in September in Oakbrook Terrace?

In Oakbrook Terrace, Illinois, in September, during 13.2 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

When it does not snow in Oakbrook Terrace?

In Oakbrook Terrace snow does not fall in June through September.

Does it snow in Oakbrook Terrace in September?

In Oakbrook Terrace, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Oakbrook Terrace have in September?

The average length of the day in September is 12.5h.

How many hours of sunshine does Oakbrook Terrace have in September?

The average sunshine in September is 8.7h.

What is the UV index reading in September in Oakbrook Terrace?

The average daily maximum UV index in September in Oakbrook Terrace is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Oakbrook Terrace, IL

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).

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Average pressure in September
Oakbrook Terrace, IL

Average pressure in September - Oakbrook Terrace, IL
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Oakbrook Terrace, IL

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).

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Average humidity in September
Oakbrook Terrace, IL

Average humidity in September - Oakbrook Terrace, IL
  • Average humidity in September: 74%

Months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Oakbrook Terrace, IL

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").

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Average rainfall days in September
Oakbrook Terrace, IL

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).

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Average snowfall in September
Oakbrook Terrace, IL

Average snowfall in September - Oakbrook Terrace, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.62").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Oakbrook Terrace, IL

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).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Oakbrook Terrace, IL

Average daylight in September / Average sunshine in September - Oakbrook Terrace, IL
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.7h

Months with the most sunshine are July and August (Average sunshine: 9.9h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in September
Oakbrook Terrace, IL

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).

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Average UV index in September
Oakbrook Terrace, IL

Average UV index in September - Oakbrook Terrace, IL
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Oakbrook Terrace, IL

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).
Months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in September
Oakbrook Terrace, IL

Average visibility in September - Oakbrook Terrace, IL
  • Average visibility in September: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January and February (5mi).

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