Koshu Weather in May

May in Koshu typically sees daytime highs of 20°C (68°F) and nighttime lows of 9°C (48°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Koshu in May

Climate statistics over the past 30 years suggest around 16 days of rain, with 155 mm (6.1 in) average for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in Koshu in May

In May, Koshu sees pleasant temperatures, with highs of 20°C (68°F). Nights drop to around 9°C (48°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Koshu in May

The month enjoys around 198 hours of sunshine, creating mostly sunny days with good weather conditions.

If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Koshu.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Koshu's climate page.

Koshu Temperature in May

Min Temperature 9°C (48°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 52%  

Precipitation 155 mm (6.1 in)  

Rainy days 16 days  

Humidity 66% *  

Sunshine 198 hours *  

Percentage Sunshine *  

* Data from: Yamanashi, Japan (4 KM, 2 Miles).

What to Wear in Koshu in May

Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Koshu in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Camping

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Koshu's climate page.

More climate data for Koshu

Temperature Rainfall Sunshine Humidity

See the full Koshu climate overview or explore weather in Japan.