Glasgow weather in September
September in Glasgow: cool, rainy, with clean air — a great time to visit.
#6 of 12 months in Glasgow · #374 of 604 destinations to visit in September · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Glasgow climate normals — September
| Daytime high | 16°C / 61°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 100 mm / 3.9 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 6.6 h/day | |
| Daylight | 12.7 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Glasgow in September — FAQ
- Is September a good time to visit Glasgow?
- September in Glasgow: cool, rainy, with clean air — a great time to visit. It ranks #6 of 12 months for Glasgow on SeasonMap's comfort score (75/100).
- What is the weather like in Glasgow in September?
- In September, Glasgow averages a daily high of 15.9°C and a low of 9.9°C, with about 100.2 mm of rain over roughly 13.4 rainy days.
- What is the air quality in Glasgow in September?
- Glasgow has a mean US Air Quality Index of about 31 in September.