Iiyama Climate by Month
The temperature in Iiyama can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and cold during the cooler months.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
Visitors to Iiyama can expect significant temperature changes throughout the year. Average daytime temperatures range from a comfortable 29°C in August, the warmest time of the year, to a chilly 3°C during cooler months like January. At night, temperatures typically average around -5°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Iiyama is known for its substantial rain/snowfall, with annual precipitation reaching 2163 mm. While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 257 mm of precipitation, spread over 21 rainy days. In contrast, April experiences a drier climate, with about 126 mm of rainfall spread across 17 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Iiyama. While May receives considerable daily sunshine with up to 6.6 hours, January marks the darkest time of the year, where sunshine is scarce with only 2.2 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is moderate throughout the year in Iiyama.
Relative humidity over the year
The best time of year to visit Iiyama in Japan
During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 3°C.
July tops the wettest month list with 257 mm of rainfall.
April is the driest month with 126 mm of precipitation.
May is the sunniest month with an average of 198 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
