Mount Iwaki Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Mount Iwaki year round climate
Spring (March–May): 4.6–14.4°C on average. The climate gradually warms up, but it remains relatively humid with relatively high rainfall. Common activities: mountain hiking (please pay attention to trail conditions), enjoying the early spring scenery in the mountains. Recommended clothing: warm jacket, comfortable and breathable trousers, waterproof jacket.
Summer (June–August): 18.9–25.4°C on average. Higher temperatures, especially in August, which has the most rainfall and higher humidity. Common activities: summer resort, activities near mountain streams. Recommended clothing: light and breathable clothing, rain gear, sunscreen.
Autumn (September–November): 9.2–21.4°C on average. Pleasant and comfortable climate, with colorful autumn leaves as the main attraction. Common activities: viewing autumn leaves, mountain hiking. Recommended clothing: light jacket, comfortable trousers.
Winter (December–February): 0.7–2.7°C on average. Cold temperatures, higher chance of snowfall. Common activities: skiing, viewing snow scenes (please check snow conditions). Recommended clothing: thick warm clothing, waterproof jacket, snow boots.
Mount Iwaki climatological average
Annual average temperature: approx. 11.8°C / Annual rainfall: approx. 2175 mm / Summer humidity: 70%–80% / Rainiest month: August
Mount Iwaki monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
0.7°C
188.8
February
0.9°C
85.8
March
4.6°C
117.9
April
10.4°C
93.9
May
14.4°C
139.1
June
18.9°C
142.2
July
23.2°C
155.6
August
25.4°C
431.4
September
21.4°C
226.7
October
14.6°C
211.4
November
9.2°C
210.3
December
2.7°C
172.1
Mount Iwaki weather for the next seven days
12/18
Thursday
Light freezing rain
2.1°C/-3.1°C
12/19
Friday
Patchy rain nearby
5.1°C/-2°C
12/20
Saturday
Partly Cloudy
10.1°C/-2.2°C
12/21
Sunday
Heavy rain
8.8°C/3.1°C
12/22
Monday
Overcast
2.4°C/-0.6°C
12/23
Tuesday
Patchy rain nearby
3.1°C/0.2°C
12/24
Wednesday
Patchy rain nearby
5.4°C/0.8°C
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