Formosa Weather in September
September in Formosa sees daytime temperatures around 28°C (82°F) and lows of 15°C (59°F) at night. With around 118 mm (4.6 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Formosa in September
Typically, about 7 days will experience rainfall, with an average of 118 mm (4.6 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Formosa in September
In September, Formosa sees high temperatures, with highs of 28°C (82°F). Nights drop to around 15°C (59°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 15°C (59°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Formosa in September
The month brings about 187 hours of sunlight, offering a comfortable mix of sun and overcast.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Formosa.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Formosa's climate page.
Formosa Temperature in September
Min Temperature
15°C (59°F)
Max Temperature
28°C (82°F)
Chance of Rain
23%
Precipitation
118 mm (4.6 in)
Rainy days
7 days
Humidity
70%
Sunshine
187 hours
Percentage Sunshine
52%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Formosa typically stay consistent throughout September, with daily highs averaging around 28°C (82°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 17°C (63°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 for Formosa in September
Browse day-by-day weather records for Formosa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Formosa historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Formosa.
- Formosa recorded its highest September temperature of 42°C (108°F) on September 30, 2020.
- Formosa registered its coldest September night on September 2, 2002, with temperatures dropping to 2°C (36°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
What to Wear in Formosa in September
Warm but pleasant conditions in Formosa 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. 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 Formosa in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Formosa's climate page.
Temperature Rainfall Sunshine Humidity
See the full Formosa climate overview or explore weather in Argentina.
