Kofu Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kofu.
Climate overview of Kofu
The climate in Kofu, Yamanashi, Japan, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in August to 4°C (39°F) in January.
The city has a wet climate, receiving around 1881 mm (74 in) of rain/snowfall per year. Despite the high annual total, it has a distinct rainy season from June to October, with warm summers and cold winters. September is the wettest month. Sunshine peaks in January, when the city sees around 6.8 hours of sunshine per day.
Kofu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kofu - and find the best time to visit.
Monthly Temperature in Kofu
In Kofu, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 27°C (81°F) in August to a chilly 4°C (39°F) in January.
Nighttime temperatures range from 19°C (66°F) in August to -6°C (21°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kofu
Kofu experiences significant rain/snowfall throughout the year, averaging 1881 mm (74 in) of precipitation annually. The seasons in Kofu bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 240 mm (9.4 in) of precipitation. This rainfall is distributed across 19 rainy days.
In contrast, the driest month, December, experiences much less snow/rainfall, totaling 71 mm (2.8 in) over 9 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Kofu 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 Kofu
Kofu enjoys sunny spells year-round. January sees up to 6.8 hours of daily sunshine, perfect for a sunny trip. September, the least sunny month, still offers a generous 4.7 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Kofu by Month
The relative humidity is high throughout the year in Kofu.
The city experiences its highest humidity in July, reaching 73%. In February, the humidity drops to its lowest level at 54%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Kofu
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and August
- Warmest weather: July and August
- Most sunshine: January, March, April, May, August and December
- Fewest rainy days: January, November and December
- Seasonal pattern: A distinct rainy season from June to October, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Kofu
What is the best time to visit Kofu?
May and August typically offer the most optimal weather in Kofu. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Kofu has a distinct rainy season from June to October, with warm summers and cold winters.
What temperatures can I expect in Kofu?
Daytime highs range from 4°C (39°F) in January to 27°C (81°F) in August. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Kofu get?
Annual rainfall is around 1881 mm (74 in). September is the wettest month with 240 mm (9.4 in), while December is the driest with 71 mm (2.8 in).
How sunny is Kofu?
Kofu receives around 2,178 hours of sunshine per year. January is the sunniest month with 204 hours, while September is the cloudiest with just 142 hours. Overall, Kofu enjoys abundant sunshine.
Kofu 3-Day Forecast
Kofu 3-Day Forecast
Kofu on the map
Kofu is highlighted - select any city to see its climate.
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