Bath weather in September
September in Bath: nice, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Bath · #296 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Bath climate normals — September
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 18°C / 64°F | |
| Rainfall | 66 mm / 2.6 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 7.7 h/day | |
| Daylight | 12.6 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Bath in September — FAQ
- Is September a good time to visit Bath?
- September in Bath: nice, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Bath on SeasonMap's comfort score (80/100).
- What is the weather like in Bath in September?
- In September, Bath averages a daily high of 19°C and a low of 11.8°C, with about 65.7 mm of rain over roughly 10.2 rainy days.
- What is the air quality in Bath in September?
- Bath has a mean US Air Quality Index of about 38 in September.