Kushiro weather by month & the best time to visit
Japan · seaside town · continental climate

The best time to visit Kushiro is July — its sunniest month (Sunshine Score 67/100), with August and September close behind. Kushiro averages about 1,827 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 122 mm of rain in July.
When is the best time to visit Kushiro?
For sunshine, the best time to visit Kushiro is July, then August and September. The dullest month is January (0/100, 40 mm of rain). The full month-by-month picture is in the table below.
How sunny is Kushiro?
Kushiro gets a moderate 1,827 hours of sunshine a year. 67 Sunshine Score points separate July (67) from January (0), so the month you pick matters. It ranks #27 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. The year's 1,049 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 | -2° / 28°F | -9° / 16°F | 40 mm | 1 | 2° / 36°F |
| February | 0 | -2° / 28°F | -9° / 16°F | 32 mm | 2 | 1° / 34°F |
| March | 0 | 2° / 36°F | -5° / 23°F | 57 mm | 2 | 0° / 32°F |
| April | 0 | 7° / 45°F | 0° / 32°F | 71 mm | 4 | 4° / 39°F |
| May | 24 | 12° / 54°F | 4° / 39°F | 100 mm | 5 | 7° / 45°F |
| June | 46 | 16° / 61°F | 9° / 48°F | 111 mm | 5 | 10° / 50°F |
| July | 67 | 20° / 68°F | 14° / 57°F | 122 mm | 5 | 14° / 57°F |
| August | 64 | 22° / 72°F | 16° / 61°F | 140 mm | 5 | 18° / 64°F |
| September | 60 | 19° / 66°F | 13° / 55°F | 130 mm | 4 | 18° / 64°F |
| October | 34 | 14° / 57°F | 7° / 45°F | 113 mm | 3 | 17° / 63°F |
| November | 0 | 7° / 45°F | 1° / 34°F | 71 mm | 1 | 14° / 57°F |
| December | 0 | 1° / 34°F | -5° / 23°F | 62 mm | 1 | 8° / 46°F |
Sea temperature in Kushiro by month
The sea off Kushiro is warmest in August at around 18°C / 64°F, and coolest in March at 0°C / 32°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Kushiro compares month by month: Kushiro vs Asahikawa · Kushiro vs Yuzhno-Sakhalinsk · Kushiro vs Obihiro · Kushiro vs Kitami · all comparisons
Kushiro: questions and answers
What kind of destination is Kushiro?
Kushiro is a seaside town in Japan with a continental climate — the sea reaches 18°C at its warmest.
How many hours of sunshine does Kushiro get a year?
Kushiro gets about 1,827 hours of sunshine a year, at its best around July.
When is the best time to visit Kushiro?
The sunniest time to visit Kushiro is July, when the Sunshine Score peaks at 67/100 (with August and September close behind). Expect daytime highs around 20°C / 68°F.
What is the least sunny month in Kushiro?
January is the least sunny month in Kushiro, scoring 0/100 with about 40 mm of rain.
What is the sea temperature in Kushiro?
The sea in Kushiro ranges from about 0°C (March) to 18°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Kushiro?
The typical midday UV index in Kushiro peaks around 5 (moderate) in May, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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