ClimateForecastDecemberJanuary >>

Iwata Climate by Month

Iwata experiences great temperature shifts. The city's weather can transition from very warm days to cold weather. It is also known for its large amounts of rainfall. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

The climate in Iwata is known for significant temperature differences throughout the year, making the weather dynamic. Typically, daytime temperatures range from a very warm 32°C in August to a chilly 11°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to 4°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Iwata has a notably wet climate with abundant precipitation, recording 2142 mm of rainfall per year. The climate in Iwata shows significant variation throughout the year. Expect heavy rainfall in June, with an average of 283 mm of precipitation over 18 rainy days.

In contrast, December offers drier and sunnier days, with around 76 mm of rainfall over 10 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

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.

Monthly hours of sunshine

Data from: Hamamatsu, Japan (10 KM, 6 Miles).

Daily hours of sunshine

Data from: Hamamatsu, Japan (10 KM, 6 Miles).

The best time of year to visit Iwata in Japan

During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Iwata?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Iwata?
    August has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Iwata?
    The coldest month is January with an average maximum temperature of 11°C.
  • Which is the wettest month in Iwata?
    June tops the wettest month list with 283 mm of rainfall.
  • Which is the driest month in Iwata?
    December is the driest month with 76 mm of precipitation.
  • Which is the sunniest month in Iwata?
    August is the sunniest month with an average of 212 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Iwata

    Mon   Dec 16
    12°C | 5°C
    W 22 km/h
    almost clear and no rain

    almost clear and no rain

    Tue   Dec 17
    12°C | 5°C
    W 22 km/h
    clear and no rain

    clear and no rain

    Wed   Dec 18
    11°C | 5°C
    W 22 km/h
    clear and no rain

    clear and no rain