September 18 sees frequent showers in Sapporo. Historical data shows a 40% chance of rain, so pack accordingly. Temperatures average 21°C. Sapporo is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Sapporo
Currency
JPY
¥ Japanese yen
Language
Japanese
Driving
Left side
Connect
Traveler SIM cards can be bought in BIC ...
Safety
Very High Safety
GPI: 1.336
Sapporo Weather Forecast for September 18
"Mild & Comfortable. Expect average highs of 21.2°C. 40% chance of rain."
What to Wear in Sapporo in September
Based on historical data for September 18, Sapporo typically experiences temperatures between 13.9°C and 21.2°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 40% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sapporo
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
21.2°C
Daytime Peak
Average Low
13.9°C
Nighttime Low
Feels Like
21.4°C
☀️ Feels accurate
Rain Chance
40%
Avg 3.5mm if it rains
Cloud Cover
64%
Light drizzle
Pressure
1012.7 hPa
Medium volatility
Sapporo Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 82% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 33 min to burn
Type III-IV
🟡 50 min to burn
Type V-VI
🟢 83 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
17.6°C
Noticeable
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Japan
Flight Traffic
High
87/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~213
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sapporo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:18
☀️ Noon
11:30
🌇 Sunset
17:42
⏱️ Daylight
12h 24m
Wind Speed
19 km/h
Gentle breeze
Sunshine
7.9 hrs
Direct Sun (Cloud-free)
Humidity
80%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sapporo
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Sapporo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sapporo on September 18 averages 21.2°C with a 40% precipitation probability. Wedding/Outdoor Event Score: 87/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sapporo 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
22.8°C • 26% rain
Score
95
September 23
19.6°C • 26% rain
Score
94
September 12
22.2°C • 31% rain
Score
93
💡 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 Sapporo Worth Visiting on September 18?
Planning a trip to Sapporo 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 21.2°C with a 40% historical precipitation risk.
✈️ Travel Logistics: Approximately 213 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Japan, including COVID-19.
📊 Historical Extremes: The hottest September 18 recorded in the last 30 years saw temperatures hit 28.2°C in 2023, while the coldest dropped to 10.3°C in 2018.