September weather forecast and climate
Columbus, OH

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 heatwave. 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.

What is the temperature in September in Columbus?

In Columbus, in September, the average high-temperature is 77°F (25°C), and the average low-temperature is 56.5°F (13.6°C).

What is the average humidity in September in Columbus?

The average relative humidity in September is 72.8%.

How much does it rain in Columbus in September?

In Columbus, during September, the rain falls for 8.4 days and regularly aggregates up to 2.8" (72.1mm) of precipitation.

Does it snow in Columbus in September?

In Columbus, Ohio, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Columbus have in September?

The average length of the day in September in Columbus, Ohio, is 12.4h.

How many hours of sunshine does Columbus have in September?

In September, the average sunshine in Columbus is 7.1h.

What is the UV index intensity in September in Columbus?

The average UV index in September in Columbus is 6.
Average temperature in September - Columbus, OH
  • 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).

  • 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).

Average humidity in September - Columbus, OH
  • 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%).

Average rainfall in September - Columbus, OH
  • 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).

Average rainfall days in September - Columbus, OH
  • 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).

Average snowfall in September - Columbus, OH
  • 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).

Average snowfall days in September - Columbus, OH
  • 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).

Average daylight in September / Average sunshine in September - Columbus, OH
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • 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).

Average UV index in September - Columbus, OH
  • 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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