Rishiri weather by month & the best time to visit
🇯🇵 Japan · seaside town · oceanic / maritime climate
The best time to visit Rishiri is September — its sunniest month (Sunshine Score 65/100), with July and August close behind. Rishiri averages about 1,513 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 123 mm of rain in September.
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- Sun hours / year
- 1,513
- Sunniest month
- September
- Peak score
- 65/100
- Rain / year
- 1,179 mm
- Snow / year
- ≈2.4 m
- Midday UV at peak
- 5 (moderate)
- Sea at warmest
- 22°C / 72°F
- Population
- 34k
- Elevation
- 29 m
When is the best time to visit Rishiri?
For sunshine, the best time to visit Rishiri is September, then July and August. The dullest month is January (0/100, 97 mm of rain). The full month-by-month picture is in the table below.
How sunny is Rishiri?
Rishiri isn't a sunny place by world standards: about 1,513 hours of sunshine a year. 65 Sunshine Score points separate September (65) from January (0), so the month you pick matters. It ranks #70 of 79 destinations in Japan for annual sunshine, below the national median of 1,773 hours. The year's 1,179 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | -1° / 30°F | -4° / 25°F | 97 mm | 0 | 6° / 43°F |
| February | 0 | -1° / 30°F | -4° / 25°F | 80 mm | 1 | 3° / 37°F |
| March | 0 | 2° / 36°F | -1° / 30°F | 71 mm | 2 | 4° / 39°F |
| April | 0 | 6° / 43°F | 3° / 37°F | 58 mm | 3 | 6° / 43°F |
| May | 12 | 10° / 50°F | 7° / 45°F | 73 mm | 4 | 8° / 46°F |
| June | 43 | 15° / 59°F | 12° / 54°F | 78 mm | 5 | 13° / 55°F |
| July | 63 | 19° / 66°F | 16° / 61°F | 102 mm | 5 | 19° / 66°F |
| August | 63 | 21° / 70°F | 19° / 66°F | 131 mm | 5 | 22° / 72°F |
| September | 65 | 20° / 68°F | 17° / 63°F | 123 mm | 4 | 21° / 70°F |
| October | 33 | 14° / 57°F | 11° / 52°F | 117 mm | 2 | 17° / 63°F |
| November | 0 | 7° / 45°F | 4° / 39°F | 123 mm | 1 | 11° / 52°F |
| December | 0 | 1° / 34°F | -2° / 28°F | 126 mm | 0 | 7° / 45°F |
Sea temperature in Rishiri by month
The sea off Rishiri is warmest in August at around 22°C / 72°F, and coolest in February at 3°C / 37°F. The water sits at a comfortable 21°C or warmer roughly 2 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Rishiri on the interactive sunshine globe →
Nearby places for sunshine
- Asahikawa Japan · 201 km · best in Jun · 1,633 h sun/yr
- Yuzhno-Sakhalinsk Russia · 218 km · best in Jul · 1,599 h sun/yr
- Sapporo Japan · 277 km · best in Jun · 1,696 h sun/yr
- Kitami Japan · 280 km · best in Jul · 1,825 h sun/yr
- Obihiro Japan · 323 km · best in Jul · 1,878 h sun/yr
- Kushiro Japan · 343 km · best in Jul · 1,827 h sun/yr
Nearest destinations
- Wakkanai Japan · 51 km · 1,513 h sun/yr · best in Aug
- Monbetsu Japan · 204 km · 1,598 h sun/yr · best in Sep
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