Best Time to Visit Kōfu, Yamanashi Prefecture, Japan
Month-by-month climate guide for planning a trip to Kōfu.
Kōfu does not have a month that clearly fits our sunny profiles. Its practical travel window centres on its warmest (August, 25.4°C / 77.7°F) and driest (December, 30 mm / 1.2 in) months. The drier stretch runs through November–May; the wetter half falls in June–October. At the city itself, monthly average temperatures range from 1.8°C / 35.2°F in January to 25.4°C / 77.7°F in August, with rainfall from 30 mm / 1.2 in (December) to 165 mm / 6.5 in (June). These are point-value climate normals sampled at Kōfu, Yamanashi Prefecture, Japan's coordinates — usually more actionable for travellers than the country-wide average. Kōfu's climate is broadly Mediterranean-style. The full month-by-month table below lets you match your travel window against our five weather profiles.
Recommended months
| Month | Temp | Rain | Feels like |
|---|---|---|---|
| July | 24.3°C75.7°F | 129 mm5.1″ | — |
| December | 4.3°C39.7°F | 30 mm1.2″ | — |
| November | 9.6°C49.3°F | 57 mm2.2″ | — |
No month at Kōfu matches our sunny profiles. The three above are the driest-and-warmest fallback.
Frequently asked questions
When is the best time to visit Kōfu?
Kōfu doesn't have a month that clearly matches our sunny profiles. The practical travel window centres on December (driest, ~30 mm / 1.2 in) and August (warmest, 25.4°C / 77.7°F). Because these are point values at the city, they can differ substantially from Japan's national average.
When is the rainy season in Kōfu?
The rainy season at Kōfu, Yamanashi Prefecture runs through June–October, when monthly rainfall exceeds the annual median of about 98 mm / 3.9 in. The wettest single month is June (165 mm / 6.5 in).
What is the driest month in Kōfu?
The driest month in Kōfu is December, averaging about 30 mm / 1.2 in of rainfall. Temperature that month averages 4.3°C / 39.7°F.
What months should I avoid visiting Kōfu?
The least comfortable months for travel to Kōfu — based on point-value climate at the city — are January, February, March, June, August, September, December. These are the wettest or coolest months at this location. Rainfall peaks at 165 mm / 6.5 in in June, and the coldest month averages 1.8°C / 35.2°F.
Is Kōfu climate different from Japan overall?
Yes, usually. Our Kōfu figures are point-value climate normals sampled at the city itself, while our Japan figures are area-weighted averages across the whole country. The two can diverge substantially in geographically diverse or elevation-varied countries. The month-by-month table below reflects Kōfu specifically — usually the more actionable data for a traveller planning to spend time in the city.