Temperature
Pleasant by day, mild at night.
Kushiro Marsh is most comfortable in June and October. Summers are mild and winters are cold. Humidity is usually low.

Pleasant by day, mild at night.
One of the wettest months.
Some sun, but clouds are common.
Very humid air is a major factor this month.
In August, afternoons feel about 67° and nights feel near 63°.
Mostly cloudy skies.
August late afternoons are around 67°F, easing to about 65°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Kushiro Marsh with Niagara Falls.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology