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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 balmy 26°C (80°F). Expect some variation, with minimums dipping to 12°C (54°F) and soaring highs of up to 38°C (101°F). During this month, rainfall can be significant, totaling around 201 mm (7.9 in) over approximately 14 days. The atmosphere holds a comfortable average humidity of 69%, making it a classic blend of warmth and moisture.

September Temperature in Cleveland

In September in Cleveland, the average temperature is 26°C (80°F), with maximums reaching 38°C (101°F) and minimums dipping as low as 12°C (54°F). Travelers should be prepared for warm days but also cool 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 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec535764687681838379716157
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 201 mm (7.9 in) over a span of 14 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 201 mm (7.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec9910110610718215411619420111775112
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 69%. With an average temperature of 26°C (80°F), this humidity feels like a warm, steamy embrace, making outdoor activities slightly sweaty and requiring frequent breaks for hydration but still inviting for leisurely strolls or exploring local attractions.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110865
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 Weather12°C (53°F)99 mm (3.9 inches)79%moderate
February Weather14°C (57°F)101 mm (4.0 inches)80%very high
March Weather18°C (65°F)106 mm (4.2 inches)78%very high
April Weather20°C (69°F)107 mm (4.2 inches)79%very high
May Weather24°C (76°F)182 mm (7.2 inches)81%extreme
June Weather27°C (81°F)154 mm (6.1 inches)77%extreme
July Weather28°C (83°F)116 mm (4.6 inches)71%extreme
August Weather28°C (83°F)194 mm (7.6 inches)67%extreme
September Weather26°C (80°F)201 mm (7.9 inches)69%very high
October Weather22°C (71°F)117 mm (4.6 inches)73%very high
November Weather16°C (61°F)75 mm (3.0 inches)82%high
December Weather14°C (57°F)111 mm (4.4 inches)87%moderate

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