Madison weather in September
September in Madison: nice, rainy, with clean air — one of the best months to visit.
#2 of 12 months in Madison · #256 of 897 destinations to visit in September · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Madison in September
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Madison climate normals — September
| Daytime high | 23°C / 74°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Rainfall | 131 mm / 5.2 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 8.8 h/day | |
| Daylight | 12.5 h | |
| Wind | 17 km/h / 11 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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Madison in September — FAQ
- Is September a good time to visit Madison?
- September in Madison: nice, rainy, with clean air — one of the best months to visit. It ranks #2 of 12 months for Madison on SeasonMap's comfort score (88/100).
- What is the weather like in Madison in September?
- In September, Madison averages a daily high of 23.1°C and a low of 14.5°C, with about 131.1 mm of rain over roughly 11.4 rainy days.
- What is the air quality in Madison in September?
- Madison has a mean US Air Quality Index of about 42 in September.