Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Koshu Weather in September
September in Koshu brings high temperatures, with daytime highs of 23°C (73°F) and nights around 15°C (59°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Koshu in September
Koshu is in the rainy season in September, with rain on around 19 days and an average of 240 mm (9.4 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Koshu in September
Expect highs of 23°C (73°F) in Koshu in September, with nights dropping to around 15°C (59°F). This month falls in the summer season. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Koshu in September
The month brings about 152 hours of sunlight, offering a comfortable mix of sun and rainy moments.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May typically offers the best weather for Koshu.
Koshu Temperature in September
Min Temperature
15°C (59°F)
Max Temperature
23°C (73°F)
Chance of Rain
64%
Precipitation
240 mm (9.4 in)
Rainy days
19 days
Humidity
71% *
Sunshine
152 hours *
Percentage Sunshine
*
* Data from: Yamanashi, Japan (4 KM, 2 Miles).
Koshu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Koshu - and find the best time to visit.
Best Places in Japan in September
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Koshu in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Koshu in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Camping6/10
Koshu 3-Day Forecast
More climate data for Koshu
Temperature Rainfall Sunshine Humidity
See the full Koshu climate overview or explore weather in Japan.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.