Itoigawa Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Itoigawa.
Climate overview of Itoigawa
Temperatures in Itoigawa, Niigata Prefecture, Japan, vary greatly throughout the year. August is the hottest month at 28°C (82°F), while January is the coldest at 4°C (39°F).
The city receives considerable rain/snowfall, with around 2801 mm (110 in) annually. January is the wettest month. It has warm summers and cold winters. August is the sunniest month, averaging 6.6 hours of sunshine per day.
Itoigawa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Itoigawa - and find the best time to visit.
Monthly Temperature in Itoigawa
The climate in Itoigawa 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 chilly 4°C (39°F) in the coolest month, January.
Nights vary from 22°C (72°F) in August to around -1°C (30°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Itoigawa
Itoigawa has a notably wet climate with abundant precipitation, recording 2801 mm (110 in) of rain/snowfall per year. Itoigawa offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month January (309 mm (12 in)) and the driest month May (147 mm (5.8 in)) is not too significant. For more details, please visit our Itoigawa 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 Itoigawa
For those who appreciate different seasons, Itoigawa serves as an ideal destination. Expect longer, more sun-filled days in August with an average of 6.6 hours of sunshine daily, and embrace the darker days in January, offering only 2.2 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Itoigawa
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: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -1°C (30°F).
Frequently asked questions about the climate in Itoigawa
What is the best time to visit Itoigawa?
May typically offers the most optimal weather in Itoigawa. In contrast, January, February, March, April, July, September, October, November and December tend to have less optimal conditions. Itoigawa has warm summers and cold winters.
What temperatures can I expect in Itoigawa?
Daytime highs range from 4°C (39°F) in January to 28°C (82°F) in August. Nighttime lows range from -1°C (30°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Itoigawa get?
Annual rainfall is around 2801 mm (110 in). January is the wettest month with 309 mm (12 in), while May is the driest with 147 mm (5.8 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Itoigawa?
Itoigawa receives around 1,595 hours of sunshine per year. August is the sunniest month with 198 hours, while January is the cloudiest with just 67 hours.
Itoigawa 3-Day Forecast
Itoigawa on the map
Itoigawa is highlighted - select any city to see its climate.
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