It was great. From Hosooka Station, it was about 7 kilometers by car to Iwahoki Water Gate, which took about 70 minutes. Then I took a taxi back to Hosooka Station, which took about 20 minutes. The whole trip took about an hour and a half. Along the way, I saw deer, eagles, and just before going ashore, I even saw a fox.
Anonymous User
Couple
Shiroko River Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Shiroko River year round climate
Spring (March–May): Average 33–50°F, cold and humid climate, occasional snowfall, but increasing sunshine hours. Common activities: Birdwatching, walking in Kushiro Marsh (dress warmly). Recommended clothing: Thick jacket, thermal underwear, waterproof pants and shoes.
Summer (June–August): Average 57–69°F, warm and humid climate, more rainfall, especially in August. Common activities: Boating on the Kushiro River, sightseeing around Lake Akan, flower viewing. Recommended clothing: Light and breathable clothing, rain gear, insect repellent.
Autumn (September–November): Average 54–65°F, cool and pleasant climate, gradually decreasing rainfall, beautiful scenery. Common activities: Maple viewing, watching migratory birds, experiencing local culture. Recommended clothing: Light jacket, comfortable long pants, thermal underwear.
Winter (December–February): Average -4.7–-35.6°F, cold and dry climate, more snowfall. Common activities: Skiing, ice fishing, enjoying snow scenery. Recommended clothing: Heavy down jacket, warm hat, gloves, scarf, waterproof snow boots.
Shiroko River climatological average
Annual average temperature: approx. 46.4°F / Annual rainfall: approx. 1059 mm / Summer humidity: 70%–80% / Rainiest month: August
Shiroko River monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
23.5°F
27
February
23.9°F
19
March
33.6°F
76.7
April
43.7°F
88.7
May
50°F
73
June
57.9°F
98.3
July
67.5°F
144.3
August
69.4°F
206
September
65.1°F
125.3
October
54.5°F
110.7
November
43.7°F
55.3
December
28.4°F
35
Shiroko River weather for the next seven days
6/6
Saturday
Patchy rain nearby
48.7°F/43.3°F
6/7
Sunday
Patchy rain nearby
50.5°F/44.8°F
6/8
Monday
Moderate rain
52.5°F/47.4°F
6/9
Tuesday
Heavy rain
50.3°F/47.3°F
6/10
Wednesday
Patchy rain nearby
55.4°F/44°F
6/11
Thursday
Patchy rain nearby
48.1°F/42.1°F
6/12
Friday
Patchy rain nearby
53.8°F/46.9°F
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