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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 18°C (64°F). Expect a minimum temperature of 5°C (41°F) and a comfortable maximum of 30°C (86°F). During this month, you'll need to prepare for 73 mm (2.9 in) of precipitation, typically spread over 10 days. With an average humidity of 79%, you'll feel the warmth, but the refreshing breezes will keep you comfortable.

September Temperature in Cleveland

In September, in Cleveland, the average temperature is 18°C (64°F). Maximum temperatures can reach 30°C (86°F), while minimum temperatures can drop as low as 5°C (41°F). Layered clothing is recommended for travelers to accommodate the varying temperatures throughout the day.

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 18°C (64°F), with highs reaching up to 30°C (86°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec222232415366737164523830
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 73 mm (2.9 in) over the course of 10 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 73 mm (2.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec4646551011079610491731084650
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 79%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities more challenging but also creates a lush, vibrant atmosphere that's perfect for exploring local culture and scenery.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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 Weather-5°C (23°F)45 mm (1.8 inches)85%low
February Weather-5°C (23°F)46 mm (1.8 inches)85%moderate
March Weather0°C (33°F)55 mm (2.2 inches)85%moderate
April Weather5°C (42°F)101 mm (4.0 inches)85%very high
May Weather12°C (53°F)107 mm (4.2 inches)78%very high
June Weather19°C (66°F)95 mm (3.8 inches)80%very high
July Weather23°C (73°F)104 mm (4.1 inches)78%very high
August Weather21°C (71°F)91 mm (3.6 inches)76%very high
September Weather18°C (64°F)73 mm (2.9 inches)79%high
October Weather11°C (52°F)108 mm (4.2 inches)83%moderate
November Weather3°C (38°F)46 mm (1.8 inches)88%moderate
December Weather-1°C (30°F)50 mm (2.0 inches)81%low

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