September Weather in Cleveland, United States

Last updated: June 24, 2025

In September, the average temperature in Cleveland, United States is a pleasant 20°C (68°F), with minimums dipping to 8°C (47°F) and occasionally reaching a warm 32°C (90°F). Be prepared for some moisture, as you'll experience around 81 mm (3.2 inches) of precipitation over 11 days. With an average humidity of 77%, make sure to stay hydrated and enjoy the vibrant atmosphere!

September Temperature in Cleveland

In September in Cleveland, the average temperature is 20°C (68°F). Maximums can reach 32°C (90°F) while minimums can drop to as low as 8°C (47°F). This makes Cleveland a favorable destination for travelers seeking mild weather with the potential for warmer days.

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 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 8°C (47°F).

Data source: Temperature data for Cleveland generated using information from the Copernicus Climate Change Service.

September Precipitation in Cleveland

In Cleveland in September, the precipitation amount is 81 mm (3.2 in) over a span of 11 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 81 mm (3.2 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Cleveland

In Cleveland in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

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 77%, offering insight into how humid the weather typically is during this month.

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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	84 mm (3.3 inches)	88%	moderate
February Weather	0°C (32°F)	89 mm (3.5 inches)	88%	moderate
March Weather	3°C (39°F)	90 mm (3.6 inches)	87%	high
April Weather	9°C (48°F)	116 mm (4.6 inches)	87%	very high
May Weather	15°C (60°F)	125 mm (4.9 inches)	81%	very high
June Weather	21°C (70°F)	118 mm (4.7 inches)	83%	very high
July Weather	24°C (75°F)	128 mm (5.1 inches)	82%	very high
August Weather	23°C (73°F)	90 mm (3.6 inches)	76%	very high
September Weather	20°C (68°F)	81 mm (3.2 inches)	77%	very high
October Weather	14°C (58°F)	115 mm (4.5 inches)	82%	high
November Weather	6°C (43°F)	101 mm (4.0 inches)	89%	moderate
December Weather	2°C (36°F)	93 mm (3.7 inches)	86%	low