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September Weather in Cleveland, United States

Last updated: June 24, 2025

In September, the average temperature in Cleveland, United States is a pleasant 23°C (73°F). Expect a comfortable range, with minimums dipping to 7°C (45°F) and maximums peaking at 35°C (95°F). You might want to carry an umbrella, as precipitation averages 133 mm (5.2 in) over 9 days. With an average humidity of 75%, make sure to stay hydrated while enjoying the beautiful weather!

September Temperature in Cleveland

In September in Cleveland, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dipping as low as 7°C (45°F). It's advisable to pack both light clothing for the warmth and warmer layers for the cooler evenings during your travels.

September Weather in Cleveland: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Cleveland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cleveland, September typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec424752616976807873645045
Data source: Temperature data for Cleveland 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 Cleveland

In Cleveland in September, the precipitation amount is 133 mm (5.2 in) spread over a duration of 9 days.

September Precipitation Trends in Cleveland

The chart displays monthly precipitation patterns in Cleveland, 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 Cleveland, September typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8812089115123899010913311289117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cleveland

In Cleveland in September, humidity is 75%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel slightly uncomfortable yet invigorating as the air wraps around you, creating a sense of walking through a lush, tropical paradise.

September Average Humidity in Cleveland

This chart illustrates the average monthly humidity levels in Cleveland, 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 Cleveland is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cleveland

In Cleveland in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Cleveland.

Maximum UV Index Levels in Cleveland for September

The chart shows the monthly maximum UV Index (UVI) for Cleveland 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 Cleveland typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
Data source: Cleveland 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 Cleveland Compares to Other Months

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

This table compares monthly weather conditions in Cleveland, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)88 mm (3.5 inches)86%moderate
February Weather8°C (47°F)120 mm (4.7 inches)85%high
March Weather11°C (52°F)89 mm (3.5 inches)84%very high
April Weather16°C (61°F)115 mm (4.5 inches)82%very high
May Weather21°C (70°F)123 mm (4.9 inches)83%very high
June Weather24°C (76°F)89 mm (3.5 inches)82%extreme
July Weather27°C (80°F)90 mm (3.5 inches)80%very high
August Weather25°C (78°F)109 mm (4.3 inches)74%very high
September Weather23°C (73°F)133 mm (5.2 inches)75%very high
October Weather18°C (64°F)112 mm (4.4 inches)79%very high
November Weather10°C (50°F)89 mm (3.5 inches)87%moderate
December Weather7°C (45°F)117 mm (4.6 inches)87%moderate

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