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Balneario Buenos Aires Weather in September
September in Balneario Buenos Aires averages 17°C (63°F) during the day and 11°C (52°F) at night. Quite a bit of rainfall is typical this month, with around 94 mm (3.7 in) on average. An umbrella is a good idea.
Rainfall in Balneario Buenos Aires in September
Historically, the month has about 10 days of rain, averaging 94 mm (3.7 in) in total. 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 Balneario Buenos Aires in September
Expect highs of 17°C (63°F) in Balneario Buenos Aires in September, with nights dropping to around 11°C (52°F). The difference between afternoon and evening temperatures is usually noticeable. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Balneario Buenos Aires in September
With about 171 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.Should you favor a climate that's both dry and comfortably warm, January, March, November and December typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Balneario Buenos Aires Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
17°C (63°F)
Chance of Rain
34%
Precipitation
94 mm (3.7 in)
Rainy days
10 days
Sunshine
171 hours *
Percentage Sunshine
*
* Data from: Punta del Este, Uruguay (16 KM, 10 Miles).
Balneario Buenos Aires Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Balneario Buenos Aires - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Balneario Buenos Aires typically stay consistent throughout September, with daily highs averaging around 17°C (63°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 10°C (50°F).
Average temperatures in September
Daily Historical Precipitation
49-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 Balneario Buenos Aires in September
Browse day-by-day weather records for Balneario Buenos Aires spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Balneario Buenos Aires historical weather extremes in September
Based on 44 years of weather observations (1981-2025), these are the most extreme conditions recorded in Balneario Buenos Aires.
- The hottest September day on record in Balneario Buenos Aires reached 32°C (90°F) (September 10, 2013).
- The lowest daytime temperature in September was 9°C (48°F), recorded on September 4, 1986.
- Nighttime temperatures dropped to -3°C (27°F) on September 4, 1988, marking the coldest September night on record.
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 Balneario Buenos Aires in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Balneario Buenos Aires in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Barbeque6/10 -
Camping8/10 -
Outdoor sports9/10
Balneario Buenos Aires 3-Day Forecast
More climate data for Balneario Buenos Aires
See the full Balneario Buenos Aires 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
Need travel inspiration? Check out our bucket list articles and be inspired.
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