Climate averages 1991–2020
Columbus weather
in September.
A warm, moderately wet month: the 4th warmest and the joint 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Columbus: daytime highs average 24.3°C and nights cool to about 14.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 73 mm of rain on roughly 8 days, which makes September a moderately wet month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Dayton (104 km away). In September its highs average 24.4°C, about as warm as Columbus, with 68 mm of rain.
Among the 498 cities listed in the United States, Columbus ranks joint 336th of 498 for the warmest September highs and joint 235th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Columbus is 2.6°C cooler than that mean.
From September to October, average highs fall by 6.8°C to 17.5°C, and monthly rainfall rises from 73 mm to 74 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Columbus climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.2°C-6.1°C | -6.1°C | 84 | 10.7 | 9.710 h |
| February | 4.4°C-4.7°C | -4.7°C | 71 | 9.4 | 10.711 h |
| March | 9.7°C-0.2°C | -0.2°C | 98 | 11.2 | 11.912 h |
| April | 16.6°C5.6°C | 5.6°C | 115 | 12.4 | 13.213 h |
| May | 21.8°C11.6°C | 11.6°C | 113 | 13.3 | 14.414 h |
| June | 26.3°C16.8°C | 16.8°C | 103 | 11.9 | 15.015 h |
| July | 28.3°C19.0°C | 19.0°C | 88 | 11.1 | 14.715 h |
| August | 27.8°C18.3°C | 18.3°C | 73 | 9.6 | 13.714 h |
| September, selected | 24.3°C14.6°C | 14.6°C | 73 | 8.3 | 12.512 h |
| October | 17.5°C8.3°C | 8.3°C | 74 | 9.0 | 11.211 h |
| November | 10.3°C2.1°C | 2.1°C | 80 | 9.4 | 10.010 h |
| December | 4.5°C-2.7°C | -2.7°C | 86 | 10.3 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Dayton in SeptemberUnited States · 104 kmHigh 24.4°C · Low 15.3°C · 68 mm rain
- Cincinnati in SeptemberUnited States · 160 kmHigh 25.0°C · Low 15.2°C · 68 mm rain
- Canton (Ohio), United States in SeptemberUnited States · 166 kmHigh 23.1°C · Low 14.0°C · 87 mm rain
- Meads in SeptemberUnited States · 174 kmHigh 25.9°C · Low 16.3°C · 91 mm rain
- Akron in SeptemberUnited States · 177 kmHigh 23.0°C · Low 14.0°C · 88 mm rain
- Parma, United States in SeptemberUnited States · 193 kmHigh 22.5°C · Low 14.8°C · 85 mm rain
- Toledo, United States in SeptemberUnited States · 195 kmHigh 23.2°C · Low 14.5°C · 63 mm rain
- Cleveland in SeptemberUnited States · 203 kmHigh 22.4°C · Low 15.2°C · 85 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Columbus) is explained once on the Columbus year overview and on the Sources, method and limits page.