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September Weather in Chillicothe, United States

Last updated: June 24, 2025

In Chillicothe, United States, the average temperature in September is a pleasant 22°C (71°F), with the potential to dip as low as 6°C (43°F) or soar to a maximum of 34°C (93°F). Expect about 85 mm (3.3 in) of precipitation spread over 8 days, accompanied by an average humidity of 72%. Embrace the mild climate and prepare for those refreshing showers!

September Temperature in Chillicothe

In September in Chillicothe, the average temperature is 22°C (71°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as 6°C (43°F). This makes it a great time to explore Chillicothe with a diverse range of weather conditions to suit different activities.

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

The chart illustrates September temperature patterns in Chillicothe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chillicothe, September typically has an average temperature of 22°C (71°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec293145536676797671564336
Data source: Temperature data for Chillicothe 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 Chillicothe

In Chillicothe in September, the precipitation amount is 85 mm (3.3 in) over the course of 8 days.

September Precipitation Trends in Chillicothe

The chart displays monthly precipitation patterns in Chillicothe, 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 Chillicothe, September typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec584710483197144110103851285035
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chillicothe

In Chillicothe in September humidity is 72%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but potentially sticky, urging travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Chillicothe

This chart illustrates the average monthly humidity levels in Chillicothe, 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 Chillicothe is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chillicothe

In Chillicothe 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 Chillicothe.

Maximum UV Index Levels in Chillicothe for September

The chart shows the monthly maximum UV Index (UVI) for Chillicothe 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 Chillicothe typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Chillicothe 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 Chillicothe Compares to Other Months

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

This table compares monthly weather conditions in Chillicothe, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)58 mm (2.3 inches)80%moderate
February Weather0°C (31°F)47 mm (1.8 inches)78%moderate
March Weather7°C (45°F)104 mm (4.1 inches)75%high
April Weather12°C (53°F)83 mm (3.3 inches)77%very high
May Weather19°C (66°F)197 mm (7.7 inches)82%very high
June Weather25°C (77°F)144 mm (5.7 inches)83%extreme
July Weather26°C (80°F)110 mm (4.3 inches)81%extreme
August Weather24°C (76°F)103 mm (4.1 inches)78%very high
September Weather22°C (71°F)85 mm (3.3 inches)72%very high
October Weather13°C (56°F)128 mm (5.0 inches)72%high
November Weather6°C (43°F)50 mm (2.0 inches)84%moderate
December Weather2°C (36°F)34 mm (1.4 inches)86%moderate

Compare Chillicothe's Climate with Cities Worldwide