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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 pleasant 18°C (64°F). However, temperatures can vary significantly, with a minimum of 1°C (35°F) and a maximum reaching 32°C (91°F). Rainfall is also a factor to consider, with an average precipitation of 111 mm (4.4 in) spread over about 10 days. Coupled with an average humidity of 81%, it's clear that Columbus offers a unique climate experience this month!

September Temperature in Columbus

In September in Columbus, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (91°F), while minimums can drop as low as 1°C (35°F). Overall, it's a great time to visit Columbus, as you can experience a pleasant mix of warm and cooler days perfect for exploring.

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 18°C (64°F), with highs reaching up to 32°C (91°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec161632435971747064483323
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 111 mm (4.4 in) over a span of 10 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 111 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec24345390122851051281111043752
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 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
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-9°C (16°F)24 mm (0.9 inches)87%low
February Weather-9°C (17°F)34 mm (1.3 inches)90%moderate
March Weather0°C (33°F)53 mm (2.1 inches)85%moderate
April Weather6°C (43°F)90 mm (3.5 inches)84%high
May Weather15°C (59°F)122 mm (4.8 inches)78%very high
June Weather22°C (71°F)85 mm (3.3 inches)80%very high
July Weather23°C (74°F)105 mm (4.1 inches)81%very high
August Weather21°C (71°F)128 mm (5.1 inches)81%very high
September Weather18°C (64°F)111 mm (4.4 inches)81%high
October Weather9°C (48°F)104 mm (4.1 inches)84%moderate
November Weather0°C (33°F)37 mm (1.4 inches)88%moderate
December Weather-5°C (23°F)52 mm (2.0 inches)84%low

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