Yonaguni weather by month & the best time to visit

🇯🇵 Japan · beach resort · tropical monsoon climate

The best time to visit Yonaguni is February — its sunniest month (Sunshine Score 78/100), with January and December close behind. Yonaguni averages about 1,466 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 47 mm of rain in February.

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Sun hours / year

1,466

Sunniest month

February

Peak score

78/100

Rain / year

1,491 mm

Midday UV at peak

11 (extreme)

Sea at warmest

31°C / 88°F

Population

4k

Elevation

14 m

When is the best time to visit Yonaguni?

For sunshine, the best time to visit Yonaguni is February, then January and December. The dullest month is May (59/100, 181 mm of rain). The full month-by-month picture is in the table below.

How sunny is Yonaguni?

Yonaguni isn't a sunny place by world standards: about 1,466 hours of sunshine a year. February (78/100) is noticeably better than May (59). It ranks #74 of 79 destinations in Japan for annual sunshine, below the national median of 1,773 hours. The year's 1,491 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

Sea temperature in Yonaguni by month

The sea off Yonaguni is warmest in July at around 31°C / 88°F, and coolest in March at 24°C / 75°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.

See Yonaguni on the interactive sunshine globe →

Nearby places for sunshine

• Ishigaki Japan · 128 km · best in Feb · 1,858 h sun/yr
• Taoyuan Taiwan · 189 km · best in Dec · 1,334 h sun/yr
• Miyakojima Japan · 222 km · best in Feb · 2,008 h sun/yr
• Miyakojima Japan · 237 km · best in Feb · 2,008 h sun/yr
• Taichung (Qingshui) Taiwan · 240 km · best in Feb · 1,740 h sun/yr
• Taitung Taiwan · 270 km · best in Feb · 1,763 h sun/yr

Nearest destinations

• Hualien City Taiwan · 147 km · 1,424 h sun/yr · best in Feb
• Tarama Japan · 173 km · 1,859 h sun/yr · best in Feb