Yamanouchi Weather & Climate: Best Time to Visit
Temperatures in Yamanouchi, Nagano Prefecture, Japan, vary greatly throughout the year. August is the hottest month at 28°C (82°F), while January is the coldest at 2°C (36°F).
The city receives considerable rain/snowfall, with around 1874 mm (74 in) annually. July is the wettest month. It has a distinct rainy season from June to September. May is the sunniest month, averaging 7.0 hours of sunshine per day.
Monthly Temperature in Yamanouchi
The climate in Yamanouchi is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in August to a very cold 2°C (36°F) in the coolest month, January.
Nights vary from 19°C (66°F) in August to around -7°C (19°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Yamanouchi
Yamanouchi has a notably wet climate with abundant precipitation, recording 1874 mm (74 in) of rain/snowfall per year. The climate in Yamanouchi shows significant variation throughout the year. Expect heavy rainfall in July, the wettest month, with an average of 246 mm (9.7 in) of precipitation over 23 rainy days.
In contrast, the driest month November offers drier and sunnier days, with around 105 mm (4.1 in) of rainfall over 17 rainy days. For more details, please visit our Yamanouchi Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Yamanouchi
Yamanouchi offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (7.0 hours daily) and January (4.3 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Yamanouchi by Month
The relative humidity is high throughout the year in Yamanouchi.
The city experiences its highest humidity in January, reaching 78%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Yamanouchi 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Yamanouchi
Yamanouchi's weather is most enjoyable during May and October, with comfortable temperatures from 17°C (63°F) to 20°C (68°F). The moderate conditions ensure pleasant weather for exploring the area. Expect varied weather during this period with rainfall between 139 mm (5.5 in) and 159 mm (6.3 in), providing a good balance of sunny and rainy days.The wettest months are June, July, August and September, when precipitation is at its highest. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
