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September Weather in Cleveland, United States

Last updated: June 24, 2025

In September, the average temperature in Cleveland, United States hovers around 25°C (78°F). Expect a minimum drop to 12°C (55°F) and an occasional peak of 36°C (98°F). During this time, 86 mm (3.4 in) of precipitation is spread over 7 days, accompanied by an average humidity of 73%, creating a uniquely vibrant atmosphere.

September Temperature in Cleveland

In September, in Cleveland, the average temperature is 25°C (78°F). Maximums can reach 36°C (98°F) and minimums can be as low as 12°C (55°F). This pleasant climate makes it an ideal destination for travelers seeking both warmth and cooler evenings.

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 25°C (78°F), with highs reaching up to 36°C (98°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec464958637379828178675350
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 total precipitation amount is 86 mm (3.4 in) over a span of 7 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 86 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec120202164149124124971238611887132
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 73%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, heavy blanket that wraps around you, making travel feel sluggish and requiring regular breaks to stay refreshed.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec47811111211119864
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 Weather8°C (46°F)119 mm (4.7 inches)84%moderate
February Weather10°C (49°F)202 mm (8.0 inches)83%high
March Weather15°C (59°F)164 mm (6.5 inches)80%very high
April Weather17°C (64°F)149 mm (5.9 inches)82%extreme
May Weather23°C (74°F)124 mm (4.9 inches)83%extreme
June Weather26°C (80°F)124 mm (4.9 inches)80%extreme
July Weather28°C (83°F)97 mm (3.8 inches)80%extreme
August Weather27°C (82°F)123 mm (4.9 inches)75%extreme
September Weather25°C (78°F)86 mm (3.4 inches)73%very high
October Weather19°C (67°F)118 mm (4.6 inches)76%very high
November Weather12°C (53°F)87 mm (3.4 inches)84%high
December Weather10°C (50°F)132 mm (5.2 inches)88%moderate

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