September 18 sees frequent showers in Cusco. Historical data shows a 47% chance of rain, so pack accordingly. Temperatures average 17°C. Expect a bustling atmosphere in Cusco right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Cusco
Currency
PEN
S/ Peruvian sol
Language
Aymara
+2 more
Driving
Right side
Safety
Moderate Safety
GPI: 2.091
Cusco Weather Forecast for September 18
"Mild & Comfortable. Expect average highs of 17.3°C. 47% chance of rain."
What to Wear in Cusco in September
Based on historical data for September 18, Cusco typically experiences temperatures between 6.5°C and 17.3°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 47% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Cusco
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
17.3°C
Daytime Peak
Average Low
6.5°C
Nighttime Low
Feels Like
17.3°C
🌤️ Feels accurate
Rain Chance
47%
Avg 4.1mm if it rains
Cloud Cover
78%
Light drizzle
Pressure
1020 hPa
Low volatility
Cusco Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 09:30
16:00 - 17:00
Type I-II
🔴 23 min to burn
Type III-IV
🟡 35 min to burn
Type V-VI
🟢 58 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Peru
Flight Traffic
High
83/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~49
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Cusco
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:41
☀️ Noon
11:43
🌇 Sunset
17:45
⏱️ Daylight
12h 3m
Wind Speed
9.7 km/h
Light breeze
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Cusco
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Cusco
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Cusco on September 18 averages 17.3°C with a 47% precipitation probability. Wedding/Outdoor Event Score: 73/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Cusco Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 11
17.3°C • 43% rain
Score
75
September 13
17.1°C • 44% rain
Score
74
September 14
17.1°C • 46% rain
Score
74
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Cusco Worth Visiting on September 18?
Planning a trip to Cusco on September 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 17.3°C with a 47% historical precipitation risk.
✈️ Travel Logistics: Approximately 49 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for Peru, including COVID-19.
📊 Historical Extremes: The hottest September 18 recorded in the last 30 years saw temperatures hit 22.6°C in 2019, while the coldest dropped to 4.2°C in 2019.