Iwata Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Iwata.
Climate overview of Iwata
Temperatures in Iwata, Shizuoka, Japan, vary greatly throughout the year. August is the hottest month at 32°C (90°F), while January is the coldest at 11°C (52°F).
The city receives considerable rainfall, with around 2142 mm (84 in) annually. June is the wettest month. It has a distinct rainy season from April to July, with very warm summers and cold winters. August is the sunniest month, averaging 7.1 hours of sunshine per day.
Iwata Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Iwata - and find the best time to visit.
Monthly Temperature in Iwata
The climate in Iwata is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in August to a chilly 11°C (52°F) in the coolest month, January.
Nights vary from 25°C (77°F) in August to around 4°C (39°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Iwata
Iwata has a notably wet climate with abundant precipitation, recording 2142 mm (84 in) of rainfall per year. The climate in Iwata shows significant variation throughout the year. Expect heavy rainfall in June, the wettest month, with an average of 283 mm (11 in) of precipitation over 18 rainy days.
In contrast, the driest month December offers drier and sunnier days, with around 76 mm (3 in) of rainfall over 10 rainy days. For more details, please visit our Iwata Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Iwata
Iwata offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between August (7.1 hours daily) and June (5.0 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Iwata by Month
The relative humidity is high throughout the year in Iwata.
The city experiences its highest humidity in June, reaching 77%. In February, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Iwata
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April
- Warmest weather: July and August
- Most sunshine: January, March, May, August and December
- Fewest rainy days: January, November and December
- Seasonal pattern: A distinct rainy season from April to July, with very warm summers and cold winters
Frequently asked questions about the climate in Iwata
What is the best time to visit Iwata?
April typically offers the most optimal weather in Iwata. In contrast, February, June, July and September tend to have less optimal conditions. Iwata has a distinct rainy season from April to July, with very warm summers and cold winters.
What temperatures can I expect in Iwata?
Daytime highs range from 11°C (52°F) in January to 32°C (90°F) in August. Nighttime lows range from 4°C (39°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Iwata get?
Annual rainfall is around 2142 mm (84 in). June is the wettest month with 283 mm (11 in), while December is the driest with 76 mm (3 in).
How sunny is Iwata?
Iwata receives around 2,256 hours of sunshine per year. August is the sunniest month with 212 hours, while June is the cloudiest with just 151 hours. Overall, Iwata enjoys abundant sunshine.
Iwata 3-Day Forecast
Iwata on the map
Iwata is highlighted - select any city to see its climate.
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