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September Weather in Columbus, United States

Last updated: June 24, 2025

In Columbus, United States, the average temperature in September hovers around 17°C (63°F). However, be prepared for a range, with minimums dipping to 2°C (35°F) and maximums soaring to 31°C (88°F). Expect about 96 mm (3.8 in) of precipitation over 11 days, accompanied by an average humidity of 67%.

September Temperature in Columbus

In September in Columbus, the average temperature is 17°C (63°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as 2°C (35°F). Travelers should be prepared for a wide range of weather conditions.

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 17°C (63°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec252835455766706863523731
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 96 mm (3.8 in) spread over 11 days, resulting in a significant accumulation of rainfall.

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 96 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10711510813514815816512196139127119
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 67%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you, making travel refreshing yet slightly muggy, as you navigate the sights with a pleasant, if slightly sticky, embrace.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
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 (26°F)106 mm (4.2 inches)89%moderate
February Weather-2°C (28°F)115 mm (4.5 inches)90%moderate
March Weather1°C (35°F)108 mm (4.2 inches)89%high
April Weather7°C (45°F)135 mm (5.3 inches)88%very high
May Weather14°C (58°F)148 mm (5.8 inches)80%very high
June Weather19°C (66°F)158 mm (6.2 inches)79%very high
July Weather21°C (71°F)165 mm (6.5 inches)74%very high
August Weather20°C (68°F)121 mm (4.8 inches)64%very high
September Weather17°C (63°F)96 mm (3.8 inches)67%very high
October Weather11°C (53°F)139 mm (5.5 inches)81%high
November Weather3°C (38°F)127 mm (5.0 inches)89%moderate
December Weather-1°C (31°F)119 mm (4.7 inches)88%low

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