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September Weather in Cleveland, United States

Last updated: June 24, 2025

In Cleveland, United States, the average temperature in September hovers around 24°C (75°F). However, you can experience a range from a cool 10°C (50°F) to a sizzling 37°C (99°F). During this month, expect about 93 mm (3.7 in) of precipitation spread across 9 days, coupled with an average humidity level of 64%. Perfect weather for exploring or relaxing indoors!

September Temperature in Cleveland

In September in Cleveland, the average temperature is 24°C (75°F). Maximum temperatures can reach 37°C (99°F), while minimums can drop to as low as 10°C (50°F). Be prepared for a range of temperatures if you're planning to travel during this month.

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 24°C (75°F), with highs reaching up to 37°C (99°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec434854617176807975655146
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 93 mm (3.7 in) over the course 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 93 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec951621581511131011051179312872129
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 64%. With average temperature 24°C (75°F), this humidity feels like a warm blanket enveloping you, making outdoor exploration both refreshing and a little sticky, perfect for leisurely strolls and shaded cafes but with a need for frequent water breaks.

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 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
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 Weather6°C (43°F)95 mm (3.7 inches)87%moderate
February Weather9°C (48°F)162 mm (6.4 inches)87%high
March Weather12°C (54°F)158 mm (6.2 inches)85%very high
April Weather16°C (61°F)151 mm (6.0 inches)82%very high
May Weather21°C (71°F)113 mm (4.4 inches)83%extreme
June Weather25°C (77°F)101 mm (4.0 inches)82%extreme
July Weather27°C (80°F)105 mm (4.1 inches)78%extreme
August Weather26°C (79°F)117 mm (4.6 inches)67%very high
September Weather24°C (75°F)93 mm (3.7 inches)64%very high
October Weather18°C (65°F)128 mm (5.0 inches)74%high
November Weather10°C (51°F)72 mm (2.8 inches)87%moderate
December Weather8°C (47°F)129 mm (5.1 inches)88%moderate

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