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September Weather in Bellefontaine, United States

Last updated: June 24, 2025

In September, the average temperature in Bellefontaine, United States hovers around 27°C (80°F). Expect a range of 18°C (65°F) to 33°C (92°F), making for pleasantly warm conditions. However, be prepared for some rain, as 199 mm (7.8 in) of precipitation can occur over approximately 13 days. With an average humidity of 80%, the air tends to feel quite tropical, adding to the allure of this vibrant destination.

September Temperature in Bellefontaine

In September in Bellefontaine, the average temperature is 27°C (80°F). Maximums can reach 33°C (92°F), and minimums can be as low as 18°C (65°F). This climate makes Bellefontaine an ideal destination for travelers seeking warm and pleasant weather.

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 27°C (80°F), with highs reaching up to 33°C (92°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec545863687580828280746358
Data source: Temperature data for Bellefontaine 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 Bellefontaine

In Bellefontaine in September, the total precipitation amount reaches 199 mm (7.8 in) over a span of 13 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 199 mm (7.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec1131288813613323915421419912757158
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bellefontaine

In Bellefontaine in September humidity is 80%. With an average temperature of 27°C (80°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities feel more exhausting and sticky, and challenging you to stay hydrated while exploring.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%87%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121210864
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.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)113 mm (4.4 inches)82%moderate
February Weather15°C (59°F)128 mm (5.0 inches)80%very high
March Weather17°C (63°F)88 mm (3.5 inches)80%very high
April Weather20°C (68°F)136 mm (5.3 inches)78%extreme
May Weather24°C (76°F)133 mm (5.2 inches)73%extreme
June Weather27°C (80°F)239 mm (9.4 inches)71%extreme
July Weather28°C (82°F)154 mm (6.0 inches)79%extreme
August Weather28°C (82°F)214 mm (8.4 inches)78%extreme
September Weather27°C (80°F)199 mm (7.8 inches)80%very high
October Weather23°C (74°F)127 mm (5.0 inches)76%very high
November Weather17°C (63°F)57 mm (2.2 inches)83%high
December Weather14°C (58°F)158 mm (6.2 inches)87%moderate

Compare Bellefontaine's Climate with Cities Worldwide