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Iwamuro

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Iwamuro Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Iwamuro year round climate

  • Spring (March–May): Average 7.5–17.2°C, mild climate but with relatively high rainfall, especially in May. Common activities: picnicking, flower viewing. Recommended clothing: light jacket, long-sleeved shirts.
  • Summer (June–August): Average 22.0–28.4°C, hot and humid, with relatively high rainfall, especially in July. Common activities: escaping the heat, playing in streams. Recommended clothing: light and breathable clothing, sun hat.
  • Autumn (September–November): Average 11.9–24.9°C, pleasant and comfortable climate, but with relatively high rainfall, especially in November. Common activities: viewing autumn leaves, hiking. Recommended clothing: comfortable jacket, long-sleeved shirts.
  • Winter (December–February): Average 3.2–5.2°C, cold and dry, with relatively high rainfall, the rainiest month being December. Common activities: soaking in hot springs, indoor activities. Recommended clothing: warm jacket, hat, scarf, gloves.

Iwamuro climatological average

Annual average temperature: approx. 15°C / Annual rainfall: approx. 1981 mm / Summer humidity: 70%–80% / Rainiest month: December

Iwamuro monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
3.2°C
150
February
3.6°C
111.3
March
7.5°C
113.7
April
13°C
79.3
May
17.2°C
128.7
June
22°C
137.7
July
26.4°C
258
August
28.4°C
108.3
September
24.9°C
202.7
October
17.1°C
147.7
November
11.9°C
217.3
December
5.2°C
326.3

Iwamuro weather for the next seven days

2/17
Tuesday
Patchy rain nearby
5.9°C/1.2°C
2/18
Wednesday
Moderate rain
8.7°C/0.5°C
2/19
Thursday
Patchy rain nearby
3.8°C/-0.2°C
2/20
Friday
Sunny
7.4°C/-1.9°C
2/21
Saturday
Partly Cloudy
12.7°C/0.8°C
2/22
Sunday
Sunny
16.3°C/3.3°C
2/23
Monday
Patchy rain nearby
8.8°C/4.6°C

Iwamuro Frequently Asked Questions and Useful Information for Travel

What is the best time to visit?

The best time to visit is winter (December to February), when the weather is cooler and suitable for bathing and sightseeing.

What are the must-see attractions?

Must-see attractions include Yahiko Sakurai Onsen, Saito Hiroen, and Taho Onsen, all of which offer rich experiences and beautiful views.