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September Weather in Oakbrook Terrace, United States

Last updated: June 24, 2025

In September, the average temperature in Oakbrook Terrace, United States is a pleasant 20°C (68°F), with a comfortable range between a minimum of 3°C (38°F) and a maximum of 34°C (93°F). However, be prepared for about 85 mm (3.4 in) of precipitation spread over 9 days, contributing to an average humidity level of 80%. Enjoy the mild climate, but don't forget your umbrella!

September Temperature in Oakbrook Terrace

In September in Oakbrook Terrace, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F), and minimums can be as low as 3°C (38°F). Be prepared for a range of weather conditions during your travels!

September Weather in Oakbrook Terrace: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Oakbrook Terrace, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oakbrook Terrace, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec262839486172757368543933
Data source: Temperature data for Oakbrook Terrace generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Oakbrook Terrace

In Oakbrook Terrace in September, the total precipitation amount is 85 mm (3.4 in) recorded over a span of 9 days.

September Precipitation Trends in Oakbrook Terrace

The chart displays monthly precipitation patterns in Oakbrook Terrace, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Oakbrook Terrace, September typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec61638912015615111691851315754
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oakbrook Terrace

In Oakbrook Terrace in September, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

September Average Humidity in Oakbrook Terrace

This chart illustrates the average monthly humidity levels in Oakbrook Terrace, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Oakbrook Terrace is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Oakbrook Terrace

In Oakbrook Terrace in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Oakbrook Terrace.

Maximum UV Index Levels in Oakbrook Terrace for September

The chart shows the monthly maximum UV Index (UVI) for Oakbrook Terrace in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Oakbrook Terrace typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Oakbrook Terrace September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Oakbrook Terrace Compares to Other Months

Weather in Oakbrook Terrace varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Oakbrook Terrace, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oakbrook Terrace, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)61 mm (2.4 inches)82%moderate
February Weather-2°C (28°F)63 mm (2.5 inches)83%moderate
March Weather4°C (40°F)89 mm (3.5 inches)84%high
April Weather9°C (49°F)120 mm (4.7 inches)85%very high
May Weather16°C (61°F)156 mm (6.1 inches)79%very high
June Weather22°C (72°F)151 mm (6.0 inches)82%very high
July Weather24°C (76°F)116 mm (4.6 inches)80%very high
August Weather23°C (73°F)91 mm (3.6 inches)81%very high
September Weather20°C (68°F)85 mm (3.4 inches)80%very high
October Weather12°C (55°F)131 mm (5.2 inches)82%high
November Weather4°C (39°F)57 mm (2.3 inches)88%moderate
December Weather1°C (33°F)54 mm (2.1 inches)84%low

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