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September Weather in Columbus, United States

Last updated: June 24, 2025

In September, the average temperature in Columbus, United States is a comfortable 20°C (69°F), while you may experience a minimum of 5°C (41°F) and a maximum that peaks at 36°C (97°F). Prepare for some rain, as the area receives around 56 mm (2.2 in) of precipitation over 8 days, coupled with an average humidity of 75%.

September Temperature in Columbus

In September in Columbus, the average temperature is 20°C (69°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop as low as 5°C (41°F). This makes Columbus a versatile destination for travelers, offering warmth during the day and cooler evenings to enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Columbus, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Columbus, September typically has an average temperature of 20°C (69°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec252540496275787469524030
Data source: Temperature data for Columbus 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 Columbus

In Columbus in September, the precipitation amount is 56 mm (2.2 in) over the course of 8 days.

September Precipitation Trends in Columbus

The chart displays monthly precipitation patterns in Columbus, 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 Columbus, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec29238852143105609656822542
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Columbus

In Columbus in September, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

September Average Humidity in Columbus

This chart illustrates the average monthly humidity levels in Columbus, 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 Columbus is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Columbus

In Columbus 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 Columbus.

Maximum UV Index Levels in Columbus for September

The chart shows the monthly maximum UV Index (UVI) for Columbus 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 Columbus typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: Columbus 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 Columbus Compares to Other Months

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

This table compares monthly weather conditions in Columbus, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)29 mm (1.1 inches)76%moderate
February Weather-4°C (25°F)23 mm (0.9 inches)80%moderate
March Weather4°C (40°F)88 mm (3.5 inches)73%high
April Weather9°C (49°F)51 mm (2.0 inches)74%very high
May Weather16°C (62°F)143 mm (5.6 inches)78%very high
June Weather24°C (76°F)104 mm (4.1 inches)82%very high
July Weather25°C (78°F)60 mm (2.4 inches)83%very high
August Weather23°C (74°F)96 mm (3.8 inches)80%very high
September Weather20°C (69°F)56 mm (2.2 inches)75%very high
October Weather11°C (52°F)82 mm (3.2 inches)75%high
November Weather4°C (40°F)25 mm (1.0 inches)82%moderate
December Weather-1°C (31°F)42 mm (1.7 inches)83%low

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