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September in Atlántida brings pleasant temperatures, with daytime highs of 18°C (64°F) and nights around 10°C (50°F). Quite a bit of rainfall is expected, around 96 mm (3.8 in), so pack an umbrella.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, March, November and December typically offer the best weather for Atlántida.
Pick a month to see the average temperature, rainfall and sunshine in Atlántida - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Atlántida 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 10°C (50°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Atlántida spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 50 years of weather observations in Atlántida between 1976 and 2026, these are the recorded extremes.
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 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).
For Atlántida in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 13°C (55°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Atlántida climate overview or explore weather in Uruguay.
Where to go in September - average daytime high across popular destinations.
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