September Weather in Bellefontaine, United States

Last updated: June 24, 2025

In September, the average temperature in Bellefontaine, United States hovers around 20°C (68°F). Expect a minimum of 5°C (40°F) and a maximum of 34°C (93°F), showcasing a delightful range. Be prepared for 80 mm (3.2 in) of precipitation spread across 9 days during the month, with an average humidity of 78% adding to the atmospheric charm.

September Temperature in Bellefontaine

In September in Bellefontaine, the average temperature is 20°C (68°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 5°C (40°F). It's a great time to visit for those who enjoy mild weather with the option of some warm days.

September Weather in Bellefontaine: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bellefontaine, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bellefontaine, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (40°F).

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

September Precipitation in Bellefontaine

In Bellefontaine in September, the total precipitation amount is 80 mm (3.2 in) over the course of 9 days.

September Precipitation Trends in Bellefontaine

The chart displays monthly precipitation patterns in Bellefontaine, 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 Bellefontaine, September typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 9 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 Bellefontaine

In Bellefontaine in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in Bellefontaine

This chart illustrates the average monthly humidity levels in Bellefontaine, 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 Bellefontaine is approximately 78%, 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 Bellefontaine

In Bellefontaine 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 Bellefontaine.

Maximum UV Index Levels in Bellefontaine for September

The chart shows the monthly maximum UV Index (UVI) for Bellefontaine 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 Bellefontaine typically reaches 8, which falls under the very high exposure category.

Data source: Bellefontaine 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 Bellefontaine Compares to Other Months

Weather in Bellefontaine varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bellefontaine, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Bellefontaine, 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)	74 mm (2.9 inches)	88%	moderate
February Weather	0°C (33°F)	101 mm (4.0 inches)	87%	moderate
March Weather	5°C (41°F)	102 mm (4.0 inches)	87%	high
April Weather	10°C (51°F)	109 mm (4.3 inches)	87%	very high
May Weather	17°C (63°F)	123 mm (4.8 inches)	81%	very high
June Weather	22°C (71°F)	125 mm (4.9 inches)	82%	very high
July Weather	24°C (75°F)	110 mm (4.3 inches)	81%	very high
August Weather	23°C (73°F)	94 mm (3.7 inches)	78%	very high
September Weather	20°C (68°F)	80 mm (3.2 inches)	78%	very high
October Weather	14°C (57°F)	98 mm (3.9 inches)	82%	high
November Weather	5°C (41°F)	94 mm (3.7 inches)	89%	moderate
December Weather	2°C (35°F)	85 mm (3.4 inches)	86%	moderate