ClimateForecastDecemberJanuary >>

Koriyama Climate by Month

The temperature in Koriyama can vary quite a bit throughout the year. Temperatures can be warm during the warmest months, and cold during the cooler months. It also experiences much rain/snowfall throughout the year. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

Visitors to Koriyama can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 29°C in August. In January, the coolest month of the year, temperatures drop to a chilly 4°C. At night, expect cooler temperatures, averaging -3°C during this month.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Koriyama is known for its substantial rain/snowfall, with annual precipitation reaching 1338 mm. Koriyama can be quite wet during July, receiving approximately 181 mm of precipitation over 22 rainy days.

In contrast December, experiences much drier conditions, with 64 mm of rainfall, spread across 21 rainy days.

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

The best time of year to visit Koriyama in Japan

During the months of May, June and September 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 Koriyama?
    The hottest season / summer takes place in June, July, August and September.
  • Which months have the greatest rainfall in Koriyama?
    Most rainfall (rainy season) is seen in July and September.
  • Which is the warmest month in Koriyama?
    August has an average maximum temperature of 29°C and is the warmest month of the year.
  • Which is the coldest month in Koriyama?
    The coldest month is January with an average maximum temperature of 4°C.
  • Which is the wettest month in Koriyama?
    July tops the wettest month list with 181 mm of rainfall.
  • Which is the driest month in Koriyama?
    December is the driest month with 64 mm of precipitation.

  • 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 Koriyama

    Sun   Dec 15
    9°C | -1°C
    W 18 km/h
    3.2 mm
    partly cloudy and  chance of slight rain

    partly cloudy and chance of slight rain

    Mon   Dec 16
    6°C | 0°C
    W 18 km/h
    2.5 mm
    broken clouds and  chance of slight snow

    broken clouds and chance of slight snow

    Tue   Dec 17
    8°C | 2°C
    W 14 km/h
    0.5 mm
    partly cloudy and slight rain

    partly cloudy and slight rain