Columbus weather in September
September in Columbus: warm, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Columbus · #68 of 897 destinations to visit in September · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Columbus in September
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Columbus climate normals — September
| Daytime high | 25°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Rainfall | 53 mm / 2.1 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 12.4 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Columbus in September — FAQ
- Is September a good time to visit Columbus?
- September in Columbus: warm, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Columbus on SeasonMap's comfort score (93/100).
- What is the weather like in Columbus in September?
- In September, Columbus averages a daily high of 25.4°C and a low of 15.9°C, with about 53 mm of rain over roughly 7.6 rainy days.
- What is the air quality in Columbus in September?
- Columbus has a mean US Air Quality Index of about 42 in September.