When to go · Koshu
Koshu in September
Great month. Inside Koshu's best window: Apr–Oct (wine festivals, fruit harvest, mild weather).
Key facts
- Verdict
- Great
- Temperature
- 24°C (75°F)75°F (24°C) / 13°C (55°F)55°F (13°C)
- average high / low
- Rain days
- 7
- Crowds
- Medium
- Japan overall
- Prices
- Medium
- Japan overall
Verdict
Inside Koshu's best window: Apr–Oct (wine festivals, fruit harvest, mild weather).
Is another month better than September?
No other month rates higher than September for Koshu in this guide.
Weather in September
- KoshuHighs around 24 °C (75 °F), lows around 13 °C (55 °F), rain on about 7 daysHighs around 75 °F (24 °C), lows around 55 °F (13 °C), rain on about 7 days
Crowds and prices
- Crowds · Japan overall
- Medium
- Prices · Japan overall
- Medium
Japan overall: Still hot; typhoon peak can cancel flights and ferries for a day or two.
Compare two months
Weather, crowds and prices for any two months in Koshu, side by side.
Verdict
Sep: Great
Apr: Great
Daytime high
Sep: 24 °C (75 °F)75 °F (24 °C)
Apr: 18 °C (64 °F)64 °F (18 °C)
Night low
Sep: 13 °C (55 °F)55 °F (13 °C)
Apr: 7 °C (45 °F)45 °F (7 °C)
Rain days
Sep: 7
Apr: 6 (better)
Crowds
Sep: Medium
Apr: High
Prices
Sep: Medium
Apr: High
Festivals listed
Sep: 0
Apr: 2
September: Inside Koshu's best window: Apr–Oct (wine festivals, fruit harvest, mild weather).
April: Inside Koshu's best window: Apr–Oct (wine festivals, fruit harvest, mild weather).
Koshu: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.