September 21 is generally a great time to visit Puerto Iguazú. While there is a slight chance of rain (25%), showers are usually brief. Expect comfortable 27°C weather. Puerto Iguazú is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Puerto Iguazú
Currency
ARS
$ Argentine peso
Language
Guaraní
+1 more
Driving
Right side
Safety
High Safety
GPI: 1.911
Puerto Iguazú Weather Forecast for September 21
"Warm & Sunny. Expect average highs of 27.2°C. 25% chance of rain."
What to Wear in Puerto Iguazú in September
Based on historical data for September 21, Puerto Iguazú typically experiences temperatures between 16.9°C and 27.2°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (25% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Puerto Iguazú
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
27.2°C
Daytime Peak
Average Low
16.9°C
Nighttime Low
Feels Like
29.4°C
🔥 Feels warmer
Rain Chance
25%
Avg 3.2mm if it rains
Cloud Cover
45%
Overcast
Pressure
1013.2 hPa
Medium volatility
Puerto Iguazú Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 86% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.7°C
Humid/Sticky
Heat Index
29.4°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Argentina
Flight Traffic
High
80/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~20
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Puerto Iguazú
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:30
☀️ Noon
12:32
🌇 Sunset
18:35
⏱️ Daylight
12h 4m
Wind Speed
15.9 km/h
Gentle breeze
Sunshine
9.0 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Puerto Iguazú
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Puerto Iguazú
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Puerto Iguazú on September 21 averages 27.2°C with a 25% precipitation probability. Wedding/Outdoor Event Score: 97/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Puerto Iguazú Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 16
26.1°C • 22% rain
Score
98
September 17
26.4°C • 21% rain
Score
98
September 18
27.1°C • 21% rain
Score
98
💡 Moving your event by a few days could significantly improve weather conditions
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Same date (September 21) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Puerto Iguazú Worth Visiting on September 21?
Planning a trip to Puerto Iguazú on September 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 27.2°C with a 25% historical precipitation risk.
✈️ Travel Logistics: Approximately 20 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Argentina, including COVID-19.
📊 Historical Extremes: The hottest September 21 recorded in the last 30 years saw temperatures hit 34.8°C in 2017, while the coldest dropped to 12.6°C in 2016.