September Weather in Cleveland, United States

Last updated: June 24, 2025

In September, the average temperature in Cleveland, United States hovers around 24°C (76°F), offering a delightful climate. Expect temperatures to range from a chilly 7°C (45°F) at night to a sizzling 37°C (99°F) during the day. With 90 mm (3.5 in) of precipitation spread over 7 days, a light shower or two may refresh the air. Humidity levels are typically at a comfortable 67%, making this a perfect time to explore and enjoy.

September Temperature in Cleveland

In September in Cleveland, the average temperature is 24°C (76°F). The maximum can reach 37°C (99°F) and the minimum can be as low as 7°C (45°F). It's advisable to pack a variety of clothing to accommodate both warm and cool conditions while exploring the area.

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 (76°F), with highs reaching up to 37°C (99°F) and lows dropping to around 7°C (45°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 90 mm (3.5 in) over the course 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 90 mm (3.5 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Cleveland

In Cleveland in September humidity is 67%. With an average temperature of 24°C (76°F), this humidity feels like a warm, steamy embrace, making travel slightly more challenging as you navigate through the thick air.

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 67%, 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 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.

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	3°C (38°F)	63 mm (2.5 inches)	77%	moderate
February Weather	4°C (40°F)	52 mm (2.0 inches)	76%	high
March Weather	12°C (53°F)	100 mm (3.9 inches)	71%	high
April Weather	15°C (59°F)	120 mm (4.7 inches)	73%	very high
May Weather	21°C (69°F)	159 mm (6.2 inches)	83%	very high
June Weather	26°C (79°F)	101 mm (4.0 inches)	83%	extreme
July Weather	28°C (83°F)	92 mm (3.6 inches)	81%	extreme
August Weather	27°C (80°F)	111 mm (4.4 inches)	73%	very high
September Weather	24°C (76°F)	90 mm (3.5 inches)	67%	very high
October Weather	16°C (62°F)	124 mm (4.9 inches)	72%	high
November Weather	10°C (50°F)	37 mm (1.5 inches)	82%	moderate
December Weather	6°C (44°F)	37 mm (1.4 inches)	85%	moderate