Japan Sapporo Weather in September — Climate Guide
September in Sapporo is Good
September is Good for Sapporo.
September starts autumn — temperatures drop to 22°C/14°C, foliage begins changing late month at Daisetsuzan (4 hours by car), Sapporo Autumn Fest brings 1,000+ tables of Hokkaido food in Odori Park. Hotel prices drop 30% from August. Heaviest rainfall month — typhoon-driven downpours.
Travel score
Sapporo September Weather Stats
Avg High
22°C
Avg Low
14°C
Rainy Days
12
142mm total
Sunshine
5.5h
Daily avg
Humidity
70%
Comfortable
UV Index
5
Moderate
Wind
13 km/h
Gusts 28
Sea Temp
19°C
Avg water temp
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
18 μg/m³
PM10
28 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
21°C
Nighttime
13°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 28 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Sapporo Autumn Fest (food festival)
- Foliage begins in mountains
- Hotel prices drop 30%
- Last warm beach days
Cons
- Heaviest rainfall month
- Typhoon possibility
- Days shortening rapidly
September Events & Festivals
- Sapporo Autumn Fest (mid-Sept, food festival)
- Maple leaves begin in mountains
- Daisetsuzan early autumn colors
Sapporo in September — Full Picture
September starts autumn — temperatures drop to 22°C/14°C, foliage begins changing late month at Daisetsuzan (4 hours by car), Sapporo Autumn Fest brings 1,000+ tables of Hokkaido food in Odori Park. Hotel prices drop 30% from August. Heaviest rainfall month — typhoon-driven downpours.
What to Wear & What to Pack
Early autumn — t-shirt + light cardigan during day, light jacket evening. Pack rain jacket — September is rainiest month due to autumn typhoons.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
10.7°C
2.3°C
13.3/mo
Summer (Jun·Jul·Aug)
24°C
16.3°C
11.3/mo
Autumn (Sep·Oct·Nov)
Current15.3°C
7°C
13.3/mo
Winter (Dec·Jan·Feb)
0°C
-6.3°C
21.7/mo
Sapporo Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -1° | -7° | 23d·113mm | 2.5h | 70% | 1 | Moderate | Peak | |
| 0° | -7° | 20d·94mm | 3.5h | 70% | 2 | Very busy | Peak | |
| 4° | -4° | 17d·78mm | 4.5h | 65% | 3 | Moderate | Shoulder | |
| 11° | 2° | 12d·57mm | 6h | 60% | 4 | Moderate | Shoulder | |
| May (Best) | 17° | 9° | 11d·60mm | 7h | 60% | 5 | Moderate | Shoulder |
| June (Best) | 21° | 13° | 9d·56mm | 7.5h | 65% | 6 | Busy | Peak |
| July (Best) | 25° | 17° | 13d·91mm | 6h | 70% | 7 | Very busy | Peak |
| 26° | 19° | 12d·124mm | 6h | 73% | 7 | Very busy | Peak | |
| 22° | 14° | 12d·142mm | 5.5h | 70% | 5 | Busy | Shoulder | |
| 16° | 7° | 11d·110mm | 5h | 65% | 3 | Moderate | Shoulder | |
| 8° | 0° | 17d·116mm | 2.5h | 70% | 1 | Quiet | Low season | |
| 1° | -5° | 22d·96mm | 2h | 73% | 1 | Busy | Peak |
View Other Months
Sapporo September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Sapporo?
Sapporo in September is Good. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Sapporo in September?
Sapporo September averages a high of 22°C and a low of 14°C.
Does it rain much in Sapporo in September?
Sapporo September averages 142mm of rainfall over about 12 rainy days.
What should I wear in Sapporo in September?
Early autumn — t-shirt + light cardigan during day, light jacket evening. Pack rain jacket — September is rainiest month due to autumn typhoons.
What time are sunrise and sunset in Sapporo in September?
Sapporo September sunrise is 05:05 and sunset is 17:40, with 12h 35m of daylight.
What's the air quality like in Sapporo in September?
Sapporo September air quality (AQI) averages 40, rated Good. PM2.5 averages 18μg/m³.
What activities are recommended in Sapporo in September?
In September, Sapporo is great for Sapporo Autumn Fest, Daisetsuzan early autumn colors, Hot air balloon at Furano.
Is September peak season in Sapporo?
Sapporo September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Sapporo
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.