Shinano Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Shinano.
Climate overview of Shinano
Temperatures in Shinano, Niigata Prefecture, Japan, vary greatly throughout the year. August is the hottest month at 29°C (84°F), while January is the coldest at 3°C (37°F).
The city receives considerable rain/snowfall, with around 2319 mm (91 in) annually. July is the wettest month. It has two distinct rainy seasons, December to February and June to October, with warm summers and cold winters. May is the sunniest month, averaging 7.0 hours of sunshine per day.
Shinano Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Shinano - and find the best time to visit.
Monthly Temperature in Shinano
The climate in Shinano is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 3°C (37°F) in the coolest month, January.
Nights vary from 20°C (68°F) in August to around -5°C (23°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Shinano
Shinano has a notably wet climate with abundant precipitation, recording 2319 mm (91 in) of rain/snowfall per year. Shinano offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month July (286 mm (11 in)) and the driest month April (136 mm (5.4 in)) is not too significant. For more details, please visit our Shinano 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 Shinano
Shinano 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 Shinano by Month
The relative humidity is high throughout the year in Shinano.
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 Shinano
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
- Seasonal pattern: Two distinct rainy seasons, December to February and June to October, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Shinano
What is the best time to visit Shinano?
May typically offers the most optimal weather in Shinano. In contrast, January, February, March, July, November and December tend to have less optimal conditions. Shinano has two distinct rainy seasons, December to February and June to October, with warm summers and cold winters.
What temperatures can I expect in Shinano?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in August. Nighttime lows range from -5°C (23°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Shinano get?
Annual rainfall is around 2319 mm (91 in). July is the wettest month with 286 mm (11 in), while April is the driest with 136 mm (5.4 in).
How sunny is Shinano?
Shinano 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.
Shinano 3-Day Forecast
Shinano on the map
Shinano 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) 
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