Iiyama weather in May (Nagano, Japan)

What can you expect from the weather in Iiyama during May? Here's what the weather might have in store during this month.

In May, Iiyama generally has pleasant temperatures and high rainfall. Anticipate daytime temperatures around 21°C, while night temperatures can drop to 10°C.

Iiyama in May usually receives high rainfall, averaging around 142 mm for the month. Typically around 17 days of rainfall is expected.

The city usually sees around 198 hours of sunlight, indicating many sunny days.

So this is a great month to visit if you prefer dry days with pleasant temperatures. May typically offers the most optimal weather. In contrast, January, February, March, November and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Iiyama climate page with graphs.

 

Iiyama, monthly averages in May

Min Temperature 10°C  

Max Temperature 21°C  

Chance of Rain 56%  

Precipitation 142 mm  

Rainy days 17 days  

Humidity 71% *  

Sunshine 198 hours *  

Percentage Sunshine *  

* Data from: Joetsu, Japan (30 KM, 18 Miles).

Where to go in Japan in May

Find out more about the weather in Japan in May and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

Map not visible? Whoops sorry! Please refresh the page.

Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Iiyama in May?

For visitors traveling to Iiyama, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

3/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Iiyama.

Our site offers climate and forecast data for every country in the world. Are you going to Japan? On this website you can find historical weather averages for many cities in Japan. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.