Isahaya Sunshine Hours by Month

To truly understand a climate, we must look at its sunshine. This page shows the total number of hours of direct sunlight per month and the average hours per day in Isahaya, Nagasaki, Japan. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020.

Monthly hours of sunshine

Seasonal sunshine in Isahaya varies. It peaks at 209 hours in August and drops to 104 hours in January. The total annual amount of sun is 1876 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Isahaya. While August receives considerable daily sunshine with up to 7.0 hours, January marks the darkest time of the year, where sunshine is scarce with only 3.5 hours of sunlight per day.

Average percent of sunshine

On average the sun shines 54% of the time during the day in August, the highest percentage of any month. January has the lowest percentage at 32%.

Isahaya enjoys an average of 1876 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, Juneau, Alaska, receives only about 1523 hours of sunshine per year and is known for its very short days in winter and frequently overcast conditions.

Toronto, Canada, sees around 2071 hours of sunshine each year, with especially long, bright summer days.

Perth, Australia, enjoys 3180 hours of sunshine annually, the highest among major Australian cities.

June, Isahaya’s wettest month, receives 190 mm (7.5 in) of rainfall and has a maximum daytime temperature of 26°C (79°F). During the driest month January you can expect a temperature of 11°C (52°F).

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