Columbus, OH weather in September
Columbus is mild in September, with some rain: highs average 78°F and nights drop to about 57°F. Expect about 9 wet days. A good month for most outdoor plans.
- Normal high
- 78°F
- Normal low
- 57°F
- Wet days
- 9
- 3.1 in total
- Muggy days
- 5
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 82°F | 72°F |
| Normal low | 61°F | 51°F |
| Chance of a wet day | 29% | 30% |
| Sunrise / sunset | 6:59 am / 8:04 pm | 7:27 am / 7:16 pm |
| Daylight | 13.1 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am59°Fdew point 55°F
- 9 am66°Fdew point 57°F
- Noon73°Fdew point 56°F
- 3 pm76°Fdew point 55°F
- 6 pm74°Fdew point 55°F
- 9 pm67°Fdew point 57°F
NOAA hourly normals (local standard time) from Columbus Port Columbus Intl Airport (7 mi away); average wind 6 mph; clear or few clouds in 45% of daytime hours, mostly cloudy or overcast in 41%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 30
- Hot dayshigh 90°F or more2 of 30
- Muggy daysdaily mean dew point 65°F or more5 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.1 in; a dry September brings about 1.7 in and a wet one about 4.3 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 85°F
- Coolest September2006: average high 72°F
- Wettest September2003: 6.9 in
- Driest September2014: 0.7 in
- Highest reading97°F (September 3, 2011)
- Lowest reading33°F (September 23, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 84°F | 78°F | 66°F |
| Normal low | 64°F | 57°F | 45°F |
| Wet days | 10 | 9 | 10 |
| Comfortable days | 5 | 13 | 13 |
| Daylight | 13.7 h | 12.4 h | 11.1 h |
Highs change by -6°F from August and -12°F into October.
How Columbus ranks in September
- Normal high225th warmest of 378 cities; 3rd of 6 in Ohio
- Wet days232nd driest of 378
- Comfortable days119th most of 342
What to pack for Columbus in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 61 heating degree days and 125 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Columbus in September?
The normal high is 78°F and the normal low is 57°F. From 1991 to 2020 the hottest September reading was 97°F (most recently on September 3, 2011).
Does it rain a lot in Columbus in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 3.1 in. The wettest September in 1991-2020 was in 2003 (6.9 in); the driest was in 2014 (0.7 in).
Is September a good time to visit Columbus?
September ranks 3rd of 12 months on our comfort score for Columbus (65 out of 100). It has about 13 comfortable days and about 2 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Columbus Port Columbus Intl Airport (USW00014821), 6.6 mi ENE of the city center, 810 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Wright Patterson AFB (USW00013840), 56 mi W of the city center, 823 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Port Columbus International Airport (724280-14821), 6.8 mi ENE of the city center, 810 ft . Hourly observations, 1991-2020.