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Kōriyama, Fukushima Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Kōriyama, Fukushima?
Kōriyama, Fukushima gets 1240 mm of precipitation a year over about 105 rainy days. August is the warmest month (average high 29°C) and January the coldest (average low -4°C).
Humid subtropical climate
Kōriyama, Fukushima has warm summers and chilly winters. Daytime highs range from about 5°C in January to 29°C in August. July is usually the wettest month. The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -3° | 6° |
| Spring | Mar–May | 4° | 16° |
| Summer | Jun–Aug | 18° | 27° |
| Autumn | Sep–Nov | 9° | 19° |
How much rain does Kōriyama get?
Kōriyama gets 1240 mm of precipitation in an average year, spread over about 105 days with measurable rain. That is fewer rainy days than 63% of Japan.
July is the wettest month, with 195 mm. February is the driest, with 32 mm. July has the most rainy days, about 14.
The longest dry spell in the last five years lasted 17 days, to February 4, 2022.
From October 2025 to September 2026 Kōriyama got 2593 mm of rain, against a normal of 1240 mm for those months. September 2026 had the most, with 1669 mm.
Kōriyama weather by month
Kōriyama weather in January
In January, Kōriyama averages a high of 5°C and a low of -4°C. It gets 38 mm of precipitation over about 6 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The January record high is 17°C (1988) and the record low is -13°C (1984).
Kōriyama weather in February
In February, Kōriyama averages a high of 6°C and a low of -3°C. It gets 32 mm of precipitation over about 6 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The February record high is 20°C (2021) and the record low is -12°C (1974).
Kōriyama weather in March
In March, Kōriyama averages a high of 10°C and a low of -1°C. It gets 65 mm of precipitation over about 8 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 23°C (2018) and the record low is -12°C (1984).
Kōriyama weather in April
In April, Kōriyama averages a high of 16°C and a low of 4°C. It gets 90 mm of precipitation over about 8 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The April record high is 29°C (2018) and the record low is -6°C (1978).
Kōriyama weather in May
In May, Kōriyama averages a high of 22°C and a low of 9°C. It gets 105 mm of precipitation over about 9 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The May record high is 33°C (2019) and the record low is 1°C (1974). May is one of the most comfortable months to visit.
Kōriyama weather in June
In June, Kōriyama averages a high of 24°C and a low of 14°C. It gets 129 mm of precipitation over about 11 rainy days. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. The June record high is 34°C (1987) and the record low is 6°C (1970). June is one of the most comfortable months to visit.
Kōriyama weather in July
In July, Kōriyama averages a high of 28°C and a low of 19°C. It gets 195 mm of precipitation over about 14 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The July record high is 36°C (2024) and the record low is 7°C (1976).
Kōriyama weather in August
In August, Kōriyama averages a high of 29°C and a low of 20°C. It gets 159 mm of precipitation over about 12 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The August record high is 36°C (2015) and the record low is 11°C (1971).
Kōriyama weather in September
In September, Kōriyama averages a high of 25°C and a low of 16°C. It gets 185 mm of precipitation over about 11 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The September record high is 33°C (2000) and the record low is 5°C (1970). September is one of the most comfortable months to visit.
Kōriyama weather in October
In October, Kōriyama averages a high of 19°C and a low of 9°C. It gets 145 mm of precipitation over about 8 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The October record high is 28°C (2012) and the record low is -2°C (1970). October is one of the most comfortable months to visit.
Kōriyama weather in November
In November, Kōriyama averages a high of 13°C and a low of 3°C. It gets 57 mm of precipitation over about 6 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The November record high is 23°C (2023) and the record low is -6°C (1983).
Kōriyama weather in December
In December, Kōriyama averages a high of 8°C and a low of -2°C. It gets 40 mm of precipitation over about 6 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The December record high is 21°C (2004) and the record low is -12°C (1976).
Sunshine, humidity and wind in Kōriyama
November is the sunniest month in Kōriyama, with estimated sunshine of 46% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 21%. The annual cloud-cover estimate is 34% of daylight hours; it is not a measurement of sunshine duration. Kōriyama is cloudier than 82% of Japan.
Humidity peaks in September at 82% and is lowest in April at 62%.
Kōriyama has about 10 days a year above 32°C. Kōriyama is cooler than 70% of Japan.
First and last freeze in Kōriyama
The first fall freeze in Kōriyama typically comes around November 12, and the last spring freeze around April 13. That leaves a frost-free growing season of about 213 days.
Kōriyama weather records
These records cover SHIRAKAWA during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Kōriyama station is 36°C, on July 17, 2012. The coldest is -13°C, on January 25, 1984.
The wettest day in the available station history brought 393 mm of precipitation, on September 9, 2026.
41 all-time records have been set at the station since 1970.
The best time to visit Kōriyama
The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 22°C.
Winter (December–February) is chilly, with average highs around 6°C and lows near -3°C.
Spring (March–May) is mild, with average highs around 16°C and lows near 4°C.
Summer (June–August) is warm, with average highs around 27°C and lows near 18°C. It can feel humid.
Autumn (September–November) is mild, with average highs around 19°C and lows near 9°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -4° | 5° | 38 mm | 6 | 70% | 40% | 17° | -13° |
| February | -3° | 6° | 32 mm | 6 | 66% | 40% | 20° | -12° |
| March | -1° | 10° | 65 mm | 8 | 65% | 37% | 23° | -12° |
| April | 4° | 16° | 90 mm | 8 | 62% | 39% | 29° | -6° |
| May | 9° | 22° | 105 mm | 9 | 67% | 33% | 33° | 1° |
| June | 14° | 24° | 129 mm | 11 | 74% | 25% | 34° | 6° |
| July | 19° | 28° | 195 mm | 14 | 80% | 21% | 36° | 7° |
| August | 20° | 29° | 159 mm | 12 | 79% | 29% | 36° | 11° |
| September | 16° | 25° | 185 mm | 11 | 82% | 22% | 33° | 5° |
| October | 9° | 19° | 145 mm | 8 | 77% | 33% | 28° | -2° |
| November | 3° | 13° | 57 mm | 6 | 75% | 46% | 23° | -6° |
| December | -2° | 8° | 40 mm | 6 | 74% | 44% | 21° | -12° |
Station: SHIRAKAWA, 33 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Kōriyama climate questions
How much rain does Kōriyama get?
Kōriyama gets 1240 mm of precipitation in an average year, over about 105 rainy days.
What is the wettest month in Kōriyama?
July is the wettest month in Kōriyama, with 195 mm. February is the driest, with 32 mm.
How many rainy days does Kōriyama have a year?
Kōriyama has about 105 days with measurable rain in an average year. July has the most, about 14.
What is the hottest month in Kōriyama?
August is the warmest month in Kōriyama, with an average high of 29°C.
What is the coldest month in Kōriyama?
January is the coldest month in Kōriyama, with an average low of -4°C.
What is the record high temperature in Kōriyama?
Within the available 1970–2026 station history, the record high at the Kōriyama station is 36°C, set on July 17, 2012. The record low is -13°C, on January 25, 1984.
What is the sunniest month in Kōriyama?
November is the sunniest month in Kōriyama, with estimated sunshine of 46% of daylight hours from ERA5 cloud cover. July is the cloudiest.
When is the first frost in Kōriyama?
The first fall freeze in Kōriyama typically comes around November 12. The last spring freeze is around April 13.
What is the best time to visit Kōriyama?
The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 22°C.