SeasonMapColonia del Sacramento weather in September
Uruguay
September in Colonia del Sacramento: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Colonia del Sacramento · #474 of 1383 destinations to visit in September · comfort 85/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Colonia del Sacramento in September
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Colonia del Sacramento climate normals — September
| Daytime high | 18°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 14°C / 58°F | 🥶 cold sea |
| Rainfall | 56 mm / 2.2 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 10°C / 49°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 11.9 h | |
| Wind | 22 km/h / 13 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Colonia del Sacramento in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Colonia del Sacramento's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherColonia del Sacramento's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
Nearby, and something's on
Within 300 km of Colonia del Sacramento — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Colonia del Sacramento?
Colonia del Sacramento in September — FAQ
- Is September a good time to visit Colonia del Sacramento?
- September in Colonia del Sacramento: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Colonia del Sacramento on SeasonMap's comfort score (85/100).
- What is the weather like in Colonia del Sacramento in September?
- In September, Colonia del Sacramento averages a daily high of 18.1°C and a low of 10.8°C, with about 56.1 mm of rain over roughly 5.8 rainy days.
- What is the air quality in Colonia del Sacramento in September?
- Colonia del Sacramento has a mean US Air Quality Index of about 30 in September.
Other months in Colonia del Sacramento
Compare Colonia del Sacramento in September
Warmer or cooler than Colonia del Sacramento in September
Similar destinations in South America — September
Within 300 km: Montevideo's Dia del Patrimonio around 28 Sep – 12 Oct, and Buenos Aires' Students' Day on 21 Sep.