Coimbra weather in September
September in Coimbra: warm, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Coimbra · #232 of 897 destinations to visit in September · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Coimbra in September
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Coimbra climate normals — September
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Rainfall | 68 mm / 2.7 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 16°C / 60°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 12.4 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Coimbra in September — FAQ
- Is September a good time to visit Coimbra?
- September in Coimbra: warm, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Coimbra on SeasonMap's comfort score (88/100).
- What is the weather like in Coimbra in September?
- In September, Coimbra averages a daily high of 26.1°C and a low of 15.5°C, with about 68 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Coimbra in September?
- Coimbra has a mean US Air Quality Index of about 44 in September.