September Weather in Columbus, United States

Last updated: June 24, 2025

In September, the average temperature in Columbus, United States hovers around 25°C (78°F), offering a pleasant climate for outdoor activities. Be prepared for a temperature range that can dip to a chilly 10°C (51°F) and soar to a scorching 38°C (101°F). During this month, you can expect approximately 32 mm (1.2 in) of rainfall spread across 4 days, contributing to an average humidity level of 74%. Stay hydrated and enjoy the vibrant atmosphere!

September Temperature in Columbus

In September in Columbus, the average temperature is 25°C (78°F). Maximums can reach 38°C (101°F) and minimums can be as low as 10°C (51°F). This makes it an ideal time for travelers to enjoy both warm days and cool evenings while exploring all that Columbus has to offer.

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 (101°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Columbus generated using information from the Copernicus Climate Change Service.

September Precipitation in Columbus

In Columbus in September, the total precipitation amount is 32 mm (1.2 in) over a span of 4 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 32 mm (1.2 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

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.

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 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	16 mm (0.6 inches)	79%	moderate
February Weather	11°C (52°F)	16 mm (0.6 inches)	76%	very high
March Weather	15°C (60°F)	17 mm (0.7 inches)	66%	very high
April Weather	21°C (69°F)	2 mm (0.1 inches)	51%	extreme
May Weather	25°C (77°F)	4 mm (0.1 inches)	42%	extreme
June Weather	30°C (85°F)	20 mm (0.8 inches)	37%	extreme
July Weather	29°C (85°F)	41 mm (1.6 inches)	51%	extreme
August Weather	29°C (84°F)	29 mm (1.2 inches)	64%	extreme
September Weather	25°C (78°F)	32 mm (1.2 inches)	74%	extreme
October Weather	20°C (68°F)	20 mm (0.8 inches)	71%	very high
November Weather	14°C (57°F)	16 mm (0.6 inches)	78%	high
December Weather	9°C (48°F)	20 mm (0.8 inches)	85%	moderate