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Iwata Weather by Month

Average temperatures, rainfall and humidity for Iwata, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Iwata month looks like before you travel — then check the live Iwata forecast for the days ahead.

Warmest month

August

32°C average high

Coolest month

January

3°C average low

Wettest month

April

180 mm of rain

Driest month

January

39 mm of rain

Average temperature and rainfall in Iwata by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January11°C3°C-7°C / 25°C
39 mm
66%15 km/h
February12°C3°C-7°C / 23°C
73 mm
66%14 km/h
March16°C7°C-3°C / 25°C
151 mm
67%13 km/h
April20°C11°C0°C / 27°C
180 mm
70%12 km/h
May24°C15°C7°C / 31°C
133 mm
73%10 km/h
June26°C20°C12°C / 34°C
174 mm
81%9 km/h
July30°C24°C16°C / 39°C
176 mm
82%9 km/h
August32°C25°C18°C / 42°C
121 mm
80%9 km/h
September29°C22°C12°C / 36°C
124 mm
81%9 km/h
October24°C16°C4°C / 32°C
115 mm
77%9 km/h
November19°C11°C1°C / 27°C
80 mm
74%10 km/h
December13°C5°C-6°C / 22°C
46 mm
69%14 km/h

Best time to visit Iwata

The most comfortable time to visit Iwata is generally May and October to November, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around April, totalling about 1,413 mm a year.

Travellers who prefer heat should aim for August, when highs average 32°C. April is the month to avoid if rain would spoil your plans — it averages 180 mm, roughly 5× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Iwata forecast for what is happening now.

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