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Foz do Iguaçu Weather in September
With daytime temperatures of 28°C (82°F) and nighttime lows of 16°C (61°F), September in Foz do Iguaçu brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 163 mm (6.4 in) falls on average.
Rainfall in Foz do Iguaçu in September
You can expect rain on around 9 days based on historical patterns, with 163 mm (6.4 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Foz do Iguaçu in September
September in Foz do Iguaçu sees highs of 28°C (82°F) and lows of 16°C (61°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Foz do Iguaçu in September
The area enjoys a balanced 150 hours of sunlight, ensuring it's neither too overcast nor too sunny.If you prefer dry days with pleasant temperatures, August typically offers 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.
Foz do Iguaçu Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
28°C (82°F)
Chance of Rain
30%
Precipitation
163 mm (6.4 in)
Rainy days
9 days
Humidity
79%
Sunshine
150 hours
Percentage Sunshine
Foz do Iguaçu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Foz do Iguaçu - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Foz do Iguaçu 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 16°C (61°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 Foz do Iguaçu in September
Browse day-by-day weather records for Foz do Iguaçu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Foz do Iguaçu historical weather extremes in September
The extremes listed below come from historical weather data collected in Foz do Iguaçu from 1976 through 2026.
- On September 30, 2020, temperatures climbed to 40°C (104°F), marking the warmest September day on record.
- Foz do Iguaçu registered its coldest September night on September 5, 2006, with temperatures dropping to 0°C (32°F).
- The wettest September day on record brought 86 mm (3.4 in) of precipitation to Foz do Iguaçu (September 2, 2023).
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil 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 Foz do Iguaçu in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Foz do Iguaçu in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Foz do Iguaçu 3-Day Forecast
More climate data for Foz do Iguaçu
Temperature Rainfall Sunshine Humidity
See the full Foz do Iguaçu climate overview or explore weather in Brazil.
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