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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 26°C (78°F). Expect a range from a cool 12°C (54°F) to a scorching 37°C (100°F). During this time, precipitation totals around 94 mm (3.7 in) spread over 9 days, contributing to an average humidity of 73%.

September Temperature in Columbus

In September in Columbus, the average temperature is 26°C (78°F), with maximums reaching up to 37°C (100°F) and minimums occasionally dropping to as low as 12°C (54°F). This range makes it an ideal destination for travelers seeking a warm climate but also allows for cooler evenings, perfect for exploring the area's attractions.

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 26°C (78°F), with highs reaching up to 37°C (100°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec495560657479818178695651
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 reaches 94 mm (3.7 in) over the course of 9 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 94 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec11611594115105107971149411472138
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 73%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting, as the air wraps around you, intensifying the heat and creating a tropical atmosphere.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
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 Weather9°C (49°F)116 mm (4.6 inches)85%moderate
February Weather13°C (55°F)115 mm (4.5 inches)84%high
March Weather15°C (60°F)94 mm (3.7 inches)82%very high
April Weather18°C (65°F)115 mm (4.5 inches)82%very high
May Weather23°C (74°F)105 mm (4.1 inches)81%extreme
June Weather26°C (79°F)107 mm (4.2 inches)77%extreme
July Weather27°C (82°F)97 mm (3.8 inches)77%extreme
August Weather27°C (81°F)114 mm (4.5 inches)72%extreme
September Weather26°C (78°F)94 mm (3.7 inches)73%very high
October Weather21°C (70°F)113 mm (4.5 inches)73%very high
November Weather13°C (56°F)71 mm (2.8 inches)85%high
December Weather11°C (52°F)138 mm (5.4 inches)88%moderate

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