Iiyama 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 Iiyama, Nagano Prefecture, Japan. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020.

Monthly hours of sunshine

Seasonal sunshine in Iiyama varies. It peaks at 198 hours in May and drops to 67 hours in January. The total annual amount of sun is 1602 hours.

Daily hours of sunshine

In Iiyama, summer days are longer and more sunny, with daily sunshine hours peaking at 6.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 2.2 hours per day.

Iiyama enjoys an average of 1602 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

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

Stockholm, Sweden, receives approximately 1907 hours of sunshine annually.

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

July, Iiyama’s wettest month, receives 197 mm (7.8 in) of rainfall and has a maximum daytime temperature of 28°C (82°F). During the driest month April you can expect a temperature of 14°C (57°F).

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