This trip was extremely satisfying. The itinerary lived up to its name, and the tour guide was meticulous, attentive, and highly professional. I can only express my gratitude! Without this ecotour, it would have been very difficult for me and my family to complete this tour on our own.
Anonymous User
Family
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 0.9–10°C, 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 14.4–20.8°C, 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 12.5–18.4°C, 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–-2°C, 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. 8°C / Annual rainfall: approx. 1059 mm / Summer humidity: 70%–80% / Rainiest month: August
Shiroko River monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-4.7°C
27
February
-4.5°C
19
March
0.9°C
76.7
April
6.5°C
88.7
May
10°C
73
June
14.4°C
98.3
July
19.7°C
144.3
August
20.8°C
206
September
18.4°C
125.3
October
12.5°C
110.7
November
6.5°C
55.3
December
-2°C
35
Shiroko River weather for the next seven days
7/19
Sunday
Light drizzle
17°C/16.4°C
7/20
Monday
Fog
21°C/15.9°C
7/21
Tuesday
Fog
19.2°C/16.9°C
7/22
Wednesday
Fog
19.3°C/16.5°C
7/23
Thursday
Patchy rain nearby
20.5°C/16.2°C
7/24
Friday
Patchy rain nearby
16.5°C/14.5°C
7/25
Saturday
Patchy rain nearby
14.6°C/13.2°C
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