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Colonia del Sacramento Weather in September
Thinking of visiting Colonia del Sacramento in September? Expect moderate temperatures reaching 18°C (64°F) during the day, dropping to 12°C (54°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Colonia del Sacramento in September
Typically around 8 days of rainfall are expected, averaging 88 mm (3.5 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Colonia del Sacramento in September
September in Colonia del Sacramento sees highs of 18°C (64°F) and lows of 12°C (54°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Colonia del Sacramento in September
The month experiences a moderate amount of sunlight, with 186 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer enjoying temperate temperatures and rain-free days, January and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Colonia del Sacramento Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
18°C (64°F)
Chance of Rain
27%
Precipitation
88 mm (3.5 in)
Rainy days
8 days
Humidity
70% *
Sunshine
186 hours *
Percentage Sunshine
*
* Data from: Buenos Aires, Argentina (74 KM, 46 Miles).
Colonia del Sacramento Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Colonia del Sacramento - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Colonia del Sacramento typically stay consistent throughout September, with daily highs averaging around 18°C (64°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Colonia del Sacramento in September
Browse day-by-day weather records for Colonia del Sacramento spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Colonia del Sacramento historical weather extremes in September
The extremes listed below come from historical weather data collected in Colonia del Sacramento from 1976 through 2026.
- The warmest day in September was on September 10, 2013, with a maximum of 32°C (90°F).
- The coldest September day was on September 6, 2008, with a maximum of 8°C (46°F).
- The lowest overnight temperature recorded in September was -2°C (28°F) (September 1, 1985).
Best Places in Uruguay in September
Find out more about the weather in Uruguay and which places have the best travel conditions in this month. See all of Uruguay in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Colonia del Sacramento in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Colonia del Sacramento in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling6/10 -
Walking6/10 -
Barbeque6/10 -
Camping8/10 -
Outdoor sports9/10
Colonia del Sacramento 3-Day Forecast
More climate data for Colonia del Sacramento
Temperature Rainfall Sunshine Humidity
See the full Colonia del Sacramento climate overview or explore weather in Uruguay.
Popular in September
Where to go in September - average daytime high across popular destinations.
Colonia del Sacramento
18°C (64°F) Montevideo18°C (64°F) La Pedrera17°C (63°F) José Ignacio
17°C (63°F) Piriápolis17°C (63°F) La Paloma16°C (61°F) Punta Del Diablo17°C (63°F) Punta del Este16°C (61°F) Bucket list
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