September weather forecast
Columbus, OH

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An evening autumn view of the cityscape of Columbus, Ohio
An evening autumn view of the cityscape of Columbus, Ohio

Weather in September

September in Columbus brings the first glimpses of fall, with temperatures starting to recede. The high averages 76.1°F (24.5°C) and the low drops to 57.7°F (14.3°C). The 1.69" (43mm) of rainfall indicate drier conditions in September. As the temperature begins to decline, it's time to pack away those summer clothes and reach for the cozier garments. Enjoy those last few sunshine-filled days as the beautiful autumn foliage starts to appear.

Temperature

Transitioning from August to September involves a subtle drop in average high-temperatures, descending from 82°F (27.8°C) to a still moderately hot 76.1°F (24.5°C). Nighttime temperature in Columbus dips to a mean of 57.7°F (14.3°C) during September.

Humidity

In Columbus, the average relative humidity in September is 74%.

Rainfall

The month with the least rainfall in Columbus is September, when the rain falls for 13.1 days and typically collects 1.69" (43mm) of precipitation.

Snowfall

In Columbus, Ohio, snow does not fall in May through September.

Daylight

In Columbus, Ohio, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 7:00 am and sunset at 8:02 pm. On the last day of September, in Columbus, sunrise is at 7:28 am and sunset at 7:15 pm EDT.

Sunshine

The average sunshine in September is 8.1h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 4 during September translates into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What is the temperature in September in Columbus?

The average high-temperature, in September, in Columbus, is 76.1°F (24.5°C), while the average low-temperature is 57.7°F (14.3°C). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 87.8°F (31°C).

What is the average humidity in September in Columbus?

The average relative humidity in September in Columbus is 74%.

What is the driest month in Columbus?

September is the month with the least rainfall in Columbus. Rain falls for 13.1 days and accumulates 1.69" (43mm) of precipitation.

How many days does it rain in September in Columbus?

In Columbus, in September, it is raining for 13.1 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow in Columbus?

May through September are months without snowfall in Columbus.

Does it snow in Columbus in September?

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

What is the average length of the day in September in Columbus?

In September, the average day length in Columbus is 12h and 26min.

When is the sunrise / sunset in September in Columbus?

On the first day of September in Columbus, sunrise is at 7:00 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:15 pm EDT.

How many hours of sunshine does Columbus have in September?

In Columbus, the average sunshine duration in September is 8.1h.

What is the UV index reading in September in Columbus?

In Columbus, Ohio, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Columbus, OH

Average temperature in September - Columbus, OH
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in September: 57.7°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in September
Columbus, OH

Average pressure in September - Columbus, OH
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Columbus, OH

Average wind speed in September - Columbus, OH
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Columbus, OH

Average humidity in September - Columbus, OH
  • Average humidity in September: 74%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in September
Columbus, OH

Average rainfall in September - Columbus, OH
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in September
Columbus, OH

Average rainfall days in September - Columbus, OH
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (9.1 days).

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Average snowfall in September
Columbus, OH

Average snowfall in September - Columbus, OH
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.31").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Columbus, OH

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 (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Columbus, OH

Average daylight in September / Average sunshine in September - Columbus, OH
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in September
Columbus, OH

Average sunshine days in September - Columbus, OH
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is May (10.1 days).

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Average UV index in September
Columbus, OH

Average UV index in September - Columbus, OH
  • Average UV index in September: 4

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Columbus, OH

Average cloud cover in September - Columbus, OH
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in September
Columbus, OH

Average visibility in September - Columbus, OH
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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Columbus, Ohio, USA

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