Yamanouchi Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Yamanouchi.
Climate overview of Yamanouchi
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, with warm summers and very cold winters. May is the sunniest month, averaging 7.0 hours of sunshine per day.
Yamanouchi Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Yamanouchi - and find the best time to visit.
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
Best Time to Visit Yamanouchi
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July and August
- Most sunshine: May and August
- Fewer rainy days: April, May, September, October and November
- Seasonal pattern: A distinct rainy season from June to September, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -7°C (19°F).
Frequently asked questions about the climate in Yamanouchi
What is the best time to visit Yamanouchi?
May typically offers the most optimal weather in Yamanouchi. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Yamanouchi has a distinct rainy season from June to September, with warm summers and very cold winters.
What temperatures can I expect in Yamanouchi?
Daytime highs range from 2°C (36°F) in January to 28°C (82°F) in August. Nighttime lows range from -7°C (19°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Yamanouchi get?
Annual rainfall is around 1874 mm (74 in). July is the wettest month with 246 mm (9.7 in), while November is the driest with 105 mm (4.1 in).
How sunny is Yamanouchi?
Yamanouchi receives around 1,951 hours of sunshine per year. May is the sunniest month with 209 hours, while January is the cloudiest with just 128 hours.
Yamanouchi 3-Day Forecast
Yamanouchi 3-Day Forecast
Yamanouchi on the map
Yamanouchi is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Osaka
32°C (90°F) Tokyo30°C (86°F) Naha
30°C (86°F) Kyoto31°C (88°F) Hakone28°C (82°F) Hakuba26°C (79°F) Sapporo24°C (75°F) Niseko24°C (75°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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.
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.