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September Weather in Columbus, United States

Last updated: June 24, 2025

In Columbus, United States, the average temperature in September is a pleasant 25°C (78°F). However, be prepared for a range of weather; temperatures can dip to a minimum of 10°C (49°F) and soar to a maximum of 38°C (100°F). Expect about 84 mm (3.3 in) of precipitation spread over 8 days, with an average humidity of 74%.

September Temperature in Columbus

In September in Columbus, the average temperature is 25°C (78°F). The maximum can reach 38°C (100°F), and the minimum can be as low as 10°C (49°F). Be prepared for warm days and cooler nights when planning your travels.

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 25°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec465158637379828177675350
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 84 mm (3.3 in) spread over 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 84 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec120170147164124137961338410468137
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 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

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 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119764
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 Weather8°C (47°F)120 mm (4.7 inches)85%moderate
February Weather11°C (52°F)170 mm (6.7 inches)84%high
March Weather15°C (59°F)147 mm (5.8 inches)82%very high
April Weather17°C (63°F)164 mm (6.5 inches)82%very high
May Weather23°C (73°F)124 mm (4.9 inches)82%extreme
June Weather26°C (79°F)137 mm (5.4 inches)79%extreme
July Weather28°C (82°F)96 mm (3.8 inches)82%extreme
August Weather27°C (81°F)133 mm (5.2 inches)77%extreme
September Weather25°C (78°F)84 mm (3.3 inches)74%very high
October Weather20°C (67°F)104 mm (4.1 inches)73%high
November Weather12°C (53°F)68 mm (2.7 inches)85%high
December Weather10°C (50°F)137 mm (5.4 inches)88%moderate

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