August 20 is generally a great time to visit Sapporo. While there is a slight chance of rain (34%), showers are usually brief. Expect comfortable 25°C weather. As it's peak season for Sapporo, we recommend booking your stay well in advance to secure the best rates.
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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 August 20
"Mild & Comfortable. Expect average highs of 24.7°C. 34% chance of rain."
What to Wear in Sapporo in August
Based on historical data for August 20, Sapporo typically experiences temperatures between 18°C and 24.7°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 34% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sapporo
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
24.7°C
Daytime Peak
Average Low
18°C
Nighttime Low
Feels Like
25.7°C
☀️ Minor difference
Rain Chance
34%
Avg 3.6mm if it rains
Cloud Cover
70%
Overcast
Pressure
1010.4 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 80% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 09:30
16:00 - 18:00
Type I-II
🔴 24 min to burn
Type III-IV
🟡 36 min to burn
Type V-VI
🟢 60 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.8°C
Humid/Sticky
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
97/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~237
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sapporo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:46
☀️ Noon
11:39
🌇 Sunset
18:32
⏱️ Daylight
13h 46m
Wind Speed
16.8 km/h
Gentle breeze
Sunshine
9.0 hrs
Direct Sun (Cloud-free)
Humidity
84%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sapporo
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Sapporo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very 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 August 20 averages 24.7°C with a 34% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— 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
August 27
24.4°C • 27% rain
Score
96
August 26
24.5°C • 29% rain
Score
94
August 16
24.8°C • 30% rain
Score
93
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 20) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sapporo Worth Visiting on August 20?
Planning a trip to Sapporo on August 20? 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 24.7°C with a 34% historical precipitation risk.
✈️ Travel Logistics: Approximately 237 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 August 20 recorded in the last 30 years saw temperatures hit 30°C in 2025, while the coldest dropped to 12.9°C in 2018.