Columbus
Ohio, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Columbus, OH

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An evening autumn view of the cityscape of Columbus, Ohio, from the water and over the bridge
An evening autumn view of the cityscape of Columbus, Ohio, from the water and over the bridge
September is one of the best times to visit Columbus in the lovely autumn season. The weather is usually calm with pleasant temperatures that average in the mild 57°F (13.9°C) to 77°F (25°C) range. It is rare to record temperatures above 90°F (32.2°C) except during a heat wave. Nights are mild and comfortable and signal cooler temperatures ahead.
September has beautiful sunshine that lasts for a daily 7 hours with 12 hours of daylight. The moderate rain of 2.8" (71.1mm) leaves many days with clear skies.
Leaves start to change colors by the third week of September and the evenings are breezy.
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  • The average high temperature in September: 25°C

The warmest month (with the highest average high temperature) is July (29.4°C).
The month with the lowest average high temperature is January (2.5°C).

  • The average low temperature in September: 13.6°C

The month with the highest average low temperature is July (18.6°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

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  • The average humidity in September: 72.8%

The month with the highest relative humidity is December (74.1%).
The month with the lowest relative humidity is April (62.5%).

  • The average rainfall in September: 72.1mm

The wettest month (with the highest rainfall) is July (121.7mm).
The driest month (with the lowest rainfall) is February (57.2mm).

  • The average rainfall days in September: 8.4 days

The month with the highest number of rainy days is January (14 days).
The month with the lowest number of rainy days is September (8.4 days).

  • The average snowfall in September: 0mm

The month with the highest snowfall is January (233.7mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

  • The average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9.1 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • The average daylight in September: 12h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in September: 7.1h

The month with most sunshine is June (Average sunshine: 8.6h).
The month with least sunshine is December (Average sunshine: 2.7h).

  • The average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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