Japan Hakodate Weather in September — Climate Guide
September in Hakodate is very good
Hakodate Weather in September — Quick Answer
As of 2026- Avg temp
- 21° / 14°
- Rainfall
- 130mm · 11 days
- Crowds
- Moderate
As of 2026, Hakodate in September averages a high of 21°C and low of 14°C with 130mm of rain over about 11 days. Light spring layers — t-shirt + light long-sleeve + light jacket combination. Evenings cool at 14°C / 57°F. Compact umbrella + light rain shell (130mm rainfall continues from August). Light fleece for Mt. Hakodate evenings.
September is very good for Hakodate.
September is Hakodate's transition from summer peak to autumn — Port Festival crowds gone, hotel pricing drops 30-40% from August, and Onuma's autumn momiji begins late month. Daytime averages 21°C / 14°C — perfect Hokkaido weather with the year's most stable conditions.
Mid-September is the canonical 'quiet luxury' window for Hakodate — Port Festival + Obon week pricing has gone, but the cool autumn weather is at its most enjoyable. La Vista Hakodate Bay drops to $160-220 (vs the August peak $260-450). Yunokawa Wakamatsu drops to $380-500 (vs the August peak $500-800). The canonical 'budget-conscious destination Hakodate' month for travelers wanting the heritage + onsen + Mt. Hakodate without the price surge.
Travel score
Quiet luxury September — hotel pricing drop + Asaichi autumn peak
September Weather at a Glance
September averages 70°F / 21°C highs and 57°F / 14°C lows. Pacific coastal Hakodate cools quickly evenings. Rainfall continues at 130mm with occasional late-month typhoon. Sunrise 5:00 AM, sunset 5:35 PM.
September Travel Advice
September is the canonical 'shoulder-season luxury Hakodate' month — book Wakamatsu Yunokawa onsen + La Vista Hakodate Bay 1-2 months ahead at non-peak rates. Mt. Hakodate cable car cancellation rate is low.
Flying In from Overseas
Quiet autumn tourism — flights from Seoul (2.5h) $350-600, Hong Kong (4.5h) $450-700, Sydney (10h via Tokyo) $700-1,100.
September Pricing Trends
Business hotels $80-130/night, La Vista Hakodate Bay $160-220/night, Yunokawa Wakamatsu $380-500/night. USD 1 ≈ JPY 148.
Hakodate September Weather Stats
Avg High
21°C
Avg Low
14°C
Rainy Days
11
130mm total
Sunshine
5h
Daily avg
Humidity
78%
comfortable
UV Index
5
Moderate
Wind
12 km/h
Gusts 24
Sea Temp
18°C
cool
Crowds
Moderate
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
21 μg/m³
PM10
34 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
21°C
Nighttime
14°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 24 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Hotel pricing drops 30-40% from August peak
- Asaichi market autumn scallop + crab peak quality
- Mt. Hakodate cable car cancellation rate low (8-12%)
- Onuma autumn momiji beginning late month
Cons
- 130mm rainfall continues with 11 rainy days
- Typhoon season — late September sees occasional Pacific typhoons
- Evening temperatures drop quickly — bring light fleece
September Events & Festivals
- Hakodate Tower Autumn Festival (mid-September)
- Asaichi market autumn scallop + crab peak quality
- Onuma National Park early-autumn momiji beginning
Hakodate in September — Full Picture
September is Hakodate's transition from summer peak to autumn — Port Festival crowds gone, hotel pricing drops 30-40% from August, and Onuma's autumn momiji begins late month. Daytime averages 21°C / 14°C — perfect Hokkaido weather with the year's most stable conditions.
Mid-September is the canonical 'quiet luxury' window for Hakodate — Port Festival + Obon week pricing has gone, but the cool autumn weather is at its most enjoyable. La Vista Hakodate Bay drops to $160-220 (vs the August peak $260-450). Yunokawa Wakamatsu drops to $380-500 (vs the August peak $500-800). The canonical 'budget-conscious destination Hakodate' month for travelers wanting the heritage + onsen + Mt. Hakodate without the price surge.
The Asaichi market autumn scallop + crab peak begins — the canonical autumn $25-35 kaisen-don with autumn-harvest premium scallop + crab + uni. Mt. Hakodate cable car cancellation rate remains low at 8-12%. Onuma National Park's autumn momiji starts late September with peak mid-October through early November — September is the early-season window for less crowded autumn photography.
What to Wear & What to Pack
Light spring layers — t-shirt + light long-sleeve + light jacket combination. Evenings cool at 14°C / 57°F. Compact umbrella + light rain shell (130mm rainfall continues from August). Light fleece for Mt. Hakodate evenings.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
11.3°C
2.7°C
9.3/mo
Summer (Jun·Jul·Aug)
23°C
17°C
10.7/mo
Autumn (Sep·Oct·Nov)
Current15.3°C
8°C
10.3/mo
Winter (Dec·Jan·Feb)
1.3°C
-5.7°C
7.7/mo
Hakodate Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 0° | -7° | 8d·70mm | 4h | 70% | 1 | Quiet | Low season | |
| 1° | -7° | 7d·60mm | 5h | 68% | 2 | Moderate | Shoulder | |
| 5° | -3° | 9d·65mm | 6h | 67% | 3 | Quiet | Low season | |
| 12° | 3° | 10d·80mm | 6h | 67% | 4 | Busy | Peak | |
| May (Best) | 17° | 8° | 9d·90mm | 7h | 70% | 5 | Very busy | Peak |
| June (Best) | 20° | 13° | 10d·80mm | 6h | 78% | 6 | Moderate | Shoulder |
| July (Best) | 23° | 18° | 11d·130mm | 5h | 80% | 7 | Busy | Peak |
| August (Best) | 26° | 20° | 11d·140mm | 6h | 80% | 7 | Very busy | Peak |
| September (Best) | 21° | 14° | 11d·130mm | 5h | 78% | 5 | Moderate | Shoulder |
| October (Best) | 16° | 8° | 10d·100mm | 5h | 73% | 3 | Busy | Peak |
| 9° | 2° | 10d·100mm | 4h | 70% | 2 | Quiet | Low season | |
| 3° | -3° | 8d·80mm | 4h | 70% | 1 | Busy | Peak |
View Other Months
Hakodate September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Hakodate?
Hakodate in September is very good. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Hakodate in September?
Hakodate September averages a high of 21°C and a low of 14°C.
Does it rain much in Hakodate in September?
Hakodate September averages 130mm of rainfall over about 11 rainy days.
What should I wear in Hakodate in September?
Light spring layers — t-shirt + light long-sleeve + light jacket combination. Evenings cool at 14°C / 57°F. Compact umbrella + light rain shell (130mm rainfall continues from August). Light fleece for Mt. Hakodate evenings.
What time are sunrise and sunset in Hakodate in September?
Hakodate September sunrise is 05:00 and sunset is 17:35, with 12h 35min of daylight.
What's the air quality like in Hakodate in September?
Hakodate September air quality (AQI) averages 44, rated Good. PM2.5 averages 21μg/m³.
What activities are recommended in Hakodate in September?
In September, Hakodate is great for Hakodate Tower Autumn Festival mid-September, Asaichi autumn scallop + crab peak, Mt. Hakodate autumn night view.
Is September peak season in Hakodate?
Hakodate September crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Hakodate
View Other Months
Planning a September trip to Hakodate?
You've checked the weather — next come the budget and the route.
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.