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Termas de Río Hondo Weather in September
September in Termas de Río Hondo brings high temperatures, with daytime highs of 28°C (82°F) and nights around 14°C (57°F). The excellent weather makes it a solid choice for a visit.
Rainfall in Termas de Río Hondo in September
Typically, you can expect about 3 days of rain this month, with 33 mm (1.3 in) on average. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.
Temperature in Termas de Río Hondo in September
September tends to be one of the excellent months in Termas de Río Hondo, with 28°C (82°F) in the afternoon and 14°C (57°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 14°C (57°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 Termas de Río Hondo in September
The days are predominantly sunny, with an estimated total of around 191 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Termas de Río Hondo Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
28°C (82°F)
Chance of Rain
10%
Precipitation
33 mm (1.3 in)
Rainy days
3 days
Humidity
51% *
Sunshine
191 hours *
Percentage Sunshine
53% *
* Data from: Santiago del Estero, Argentina (67 KM, 41 Miles).
Termas de Río Hondo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Termas de Río Hondo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Termas de Río Hondo typically rise from around 24°C (75°F) at the start of September to approximately 27°C (81°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 14°C (57°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 Termas de Río Hondo in September
Browse day-by-day weather records for Termas de Río Hondo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Termas de Río Hondo historical weather extremes in September
Our historical data for Termas de Río Hondo spans 1976 to 2026, revealing these weather extremes.
- On September 19, 1994, temperatures climbed to 42°C (108°F), marking the warmest September day on record.
- The coldest night in September in Termas de Río Hondo was on September 16, 1980, with a minimum of -3°C (27°F).
Best Places in Argentina in September
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina 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 Termas de Río Hondo in September
Warm but pleasant conditions in Termas de Río Hondo in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Termas de Río Hondo in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Termas de Río Hondo 3-Day Forecast
More climate data for Termas de Río Hondo
Temperature Rainfall Sunshine Humidity
See the full Termas de Río Hondo climate overview or explore weather in Argentina.
Popular in September
Where to go in September - average daytime high across popular destinations.
Córdoba
23°C (73°F) Salta21°C (70°F) Mendoza20°C (68°F) Buenos Aires
20°C (68°F) Mar del Plata16°C (61°F) San Martín de los Andes
8°C (46°F) San Carlos de Bariloche8°C (46°F) Bucket list
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