Montevideo weather in September
September in Montevideo: cool, a little rain, with clean air — an excellent time to visit.
#8 of 12 months in Montevideo · #270 of 604 destinations to visit in September · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Montevideo climate normals — September
| Daytime high | 16°C / 60°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 62 mm / 2.4 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 9°C / 47°F | |
| Sunshine | 8.6 h/day | |
| Daylight | 11.9 h | |
| Wind | 23 km/h / 14 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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Montevideo in September — FAQ
- Is September a good time to visit Montevideo?
- September in Montevideo: cool, a little rain, with clean air — an excellent time to visit. It ranks #8 of 12 months for Montevideo on SeasonMap's comfort score (82/100).
- What is the weather like in Montevideo in September?
- In September, Montevideo averages a daily high of 15.6°C and a low of 10.8°C, with about 61.6 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Montevideo in September?
- Montevideo has a mean US Air Quality Index of about 38 in September.