Average Monthly Sunshine in Karuizawa

The graphs on this page shows the average number of hours per month and per day that Karuizawa receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

While the amount of sunshine in Karuizawa changes moderately throughout the year, the annual total remains impressive at around 1951 hours. Expect slightly brighter days in May and a subtle dip in January.

Daily hours of sunshine

The difference in daily sunshine hours between May (7.0 hours per day) and January (4.3 hours per day) offers moderate variety for visitors and residents.

Karuizawa’s total hours of sunshine compared to other major cities

Karuizawa enjoys an average of 1951 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

In contrast, London, UK, receives only about 1659 hours of sunshine per year, known for its frequently overcast and rainy skies.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 2520 hours of sunshine annually.

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

Other climate information

July, Karuizawa’s wettest month, receives 211 mm of rainfall and has a maximum daytime temperature of 27°C. During the driest month December you can expect a temperature of 7°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Karuizawa Precipitation page.