September weather forecast
Columbus, IN

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Weather in September

Moving into September, fall begins to set its foot in Columbus, Indiana. After the summer's intense heat, September records a significant drop in average high temperature to 77°F (25°C). The slight drop in temperatures creates a more comfortable outdoor climate compared to previous hot months. The weather remains relatively dry with shorter sunny spells, and residents start to experience cooler evenings. This shift in weather signifies the beginning of a beautiful transition from summer to fall, with leaves changing colors and daylight hours getting notably shorter.

Temperature

September is characterized by a slight reduction in average high-temperature, easing from 82.8°F (28.2°C) in August to a still moderately hot 77°F (25°C). Columbus's temperature drops to an average low of 58.3°F (14.6°C) during the nights of September.

Humidity

In September, the average relative humidity is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 14.1 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

In Columbus, snow does not fall in May through October.

Daylight

In Columbus, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 7:13 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:27 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In Columbus, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 5 during September leads to these instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

In September, the average high-temperature and low-temperature in Columbus are 77°F (25°C) and 58.3°F (14.6°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in September?

In Columbus, the average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 14.1 days and accumulates 1.73" (44mm) of precipitation.

How many days does it rain in September?

In Columbus, in September, it is raining for 14.1 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow?

In Columbus, snow does not fall in May through October.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:13 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:27 pm EDT.

How long on average sun shines in September?

In Columbus, the average sunshine duration in September is 8.4h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
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, IN

Average temperature in September - Columbus, IN
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 58.3°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 (22.5°F).

Average pressure in September
Columbus, IN

Average pressure in September - Columbus, IN
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Columbus, IN

Average wind speed in September - Columbus, IN
  • Average wind speed in September: 5.9mph

The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in September
Columbus, IN

Average humidity in September - Columbus, IN
  • Average humidity in September: 76%

The months with the highest relative humidity are January, February, July and December (81%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September
Columbus, IN

Average rainfall in September - Columbus, IN
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days in September
Columbus, IN

Average rainfall days in September - Columbus, IN
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (9.4 days).

Average snowfall in September
Columbus, IN

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

The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Columbus, IN

Average snowfall days in September - Columbus, IN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in September
Columbus, IN

Average sunshine days in September - Columbus, IN
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.3 days).

Average UV index in September
Columbus, IN

Average UV index in September - Columbus, IN
  • Average UV index in September: 5

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

Average cloud cover in September
Columbus, IN

Average cloud cover in September - Columbus, IN
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Columbus, IN

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

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

Columbus, Indiana, USA

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