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Hirosaki, Aomori Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Hirosaki, Aomori?
Hirosaki, Aomori gets 1299 mm of precipitation a year over about 169 rainy days. August is the warmest month (average high 28°C) and January the coldest (average low -4°C).
Humid continental climate
Hirosaki, Aomori has warm summers and cold winters. Daytime highs range from about 2°C in January to 28°C in August. December is usually the wettest month. The most comfortable time to visit is typically May to July and September to October, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -3° | 3° |
| Spring | Mar–May | 4° | 13° |
| Summer | Jun–Aug | 17° | 26° |
| Autumn | Sep–Nov | 9° | 18° |
How much rain does Hirosaki get?
Hirosaki gets 1299 mm of precipitation in an average year, spread over about 169 days with measurable rain. That is more rainy days than 91% of Japan.
December is the wettest month, with 165 mm. April is the driest, with 68 mm. January has the most rainy days, about 24.
The longest dry spell in the last five years lasted 15 days, to September 16, 2022.
From October 2025 to September 2026 Hirosaki got 1065 mm of rain, against a normal of 1299 mm for those months. September 2026 had the most, with 629 mm.
Hirosaki weather by month
Hirosaki weather in January
In January, Hirosaki averages a high of 2°C and a low of -4°C. It gets 136 mm of precipitation over about 24 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The January record high is 12°C (1988) and the record low is -14°C (1977).
Hirosaki weather in February
In February, Hirosaki averages a high of 3°C and a low of -4°C. It gets 98 mm of precipitation over about 19 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The February record high is 17°C (2010) and the record low is -14°C (1977).
Hirosaki weather in March
In March, Hirosaki averages a high of 7°C and a low of -1°C. It gets 71 mm of precipitation over about 16 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The March record high is 22°C (2018) and the record low is -13°C (1970).
Hirosaki weather in April
In April, Hirosaki averages a high of 14°C and a low of 3°C. It gets 68 mm of precipitation over about 11 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The April record high is 28°C (1998) and the record low is -7°C (1970).
Hirosaki weather in May
In May, Hirosaki averages a high of 19°C and a low of 9°C. It gets 76 mm of precipitation over about 10 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 -2°C (1987). May is one of the most comfortable months to visit.
Hirosaki weather in June
In June, Hirosaki averages a high of 22°C and a low of 14°C. It gets 71 mm of precipitation over about 8 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The June record high is 33°C (1987) and the record low is 4°C (1985). June is one of the most comfortable months to visit.
Hirosaki weather in July
In July, Hirosaki averages a high of 26°C and a low of 18°C. It gets 118 mm of precipitation over about 9 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The July record high is 36°C (2017) and the record low is 7°C (1976). July is one of the most comfortable months to visit.
Hirosaki weather in August
In August, Hirosaki averages a high of 28°C and a low of 19°C. It gets 130 mm of precipitation over about 10 rainy days. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. The August record high is 37°C (2015) and the record low is 9°C (1972).
Hirosaki weather in September
In September, Hirosaki averages a high of 24°C and a low of 15°C. It gets 123 mm of precipitation over about 10 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The September record high is 36°C (2012) and the record low is 6°C (1976). September is one of the most comfortable months to visit.
Hirosaki weather in October
In October, Hirosaki averages a high of 18°C and a low of 8°C. It gets 115 mm of precipitation over about 12 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The October record high is 28°C (2025) and the record low is -1°C (1970). October is one of the most comfortable months to visit.
Hirosaki weather in November
In November, Hirosaki averages a high of 11°C and a low of 3°C. It gets 129 mm of precipitation over about 17 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The November record high is 24°C (2003) and the record low is -7°C (1998).
Hirosaki weather in December
In December, Hirosaki averages a high of 5°C and a low of -2°C. It gets 165 mm of precipitation over about 22 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The December record high is 18°C (1990) and the record low is -11°C (1984).
Sunshine, humidity and wind in Hirosaki
April is the sunniest month in Hirosaki, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 22%. The annual cloud-cover estimate is 29% of daylight hours; it is not a measurement of sunshine duration. Hirosaki is cloudier than 97% of Japan.
Humidity peaks in July at 84% and is lowest in April at 67%.
Hirosaki has about 6 days a year above 32°C. Hirosaki is cooler than 76% of Japan.
First and last freeze in Hirosaki
The first fall freeze in Hirosaki typically comes around November 17, and the last spring freeze around April 12. That leaves a frost-free growing season of about 219 days.
Hirosaki weather records
These records cover AOMORI during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Hirosaki station is 37°C, on August 12, 1994. The coldest is -14°C, on February 5, 1977.
The wettest day in the available station history brought 249 mm of precipitation, on September 15, 2026.
51 all-time records have been set at the station since 1970.
The best time to visit Hirosaki
The most comfortable time to visit is typically May to July and September to October, when daytime highs sit near 22°C.
Winter (December–February) is cold, with average highs around 3°C and lows near -3°C.
Spring (March–May) is mild, with average highs around 13°C and lows near 4°C.
Summer (June–August) is warm, with average highs around 25°C and lows near 17°C. It can feel humid.
Autumn (September–November) is mild, with average highs around 18°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° | 2° | 136 mm | 24 | 82% | 26% | 12° | -14° |
| February | -4° | 3° | 98 mm | 19 | 79% | 27% | 17° | -14° |
| March | -1° | 7° | 71 mm | 16 | 73% | 35% | 22° | -13° |
| April | 3° | 14° | 68 mm | 11 | 67% | 40% | 28° | -7° |
| May | 9° | 19° | 76 mm | 10 | 73% | 33% | 33° | -2° |
| June | 14° | 22° | 71 mm | 8 | 78% | 26% | 33° | 4° |
| July | 18° | 26° | 118 mm | 9 | 84% | 22% | 36° | 7° |
| August | 19° | 28° | 130 mm | 10 | 84% | 25% | 37° | 9° |
| September | 15° | 24° | 123 mm | 10 | 81% | 29% | 36° | 6° |
| October | 8° | 18° | 115 mm | 12 | 80% | 33% | 28° | -1° |
| November | 3° | 11° | 129 mm | 17 | 80% | 31% | 24° | -7° |
| December | -2° | 5° | 165 mm | 22 | 83% | 26% | 18° | -11° |
Station: AOMORI, 35 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.
Hirosaki climate questions
How much rain does Hirosaki get?
Hirosaki gets 1299 mm of precipitation in an average year, over about 169 rainy days.
What is the wettest month in Hirosaki?
December is the wettest month in Hirosaki, with 165 mm. April is the driest, with 68 mm.
How many rainy days does Hirosaki have a year?
Hirosaki has about 169 days with measurable rain in an average year. January has the most, about 24.
What is the hottest month in Hirosaki?
August is the warmest month in Hirosaki, with an average high of 28°C.
What is the coldest month in Hirosaki?
January is the coldest month in Hirosaki, with an average low of -4°C.
What is the record high temperature in Hirosaki?
Within the available 1970–2026 station history, the record high at the Hirosaki station is 37°C, set on August 12, 1994. The record low is -14°C, on February 5, 1977.
What is the sunniest month in Hirosaki?
April is the sunniest month in Hirosaki, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. July is the cloudiest.
When is the first frost in Hirosaki?
The first fall freeze in Hirosaki typically comes around November 17. The last spring freeze is around April 12.
What is the best time to visit Hirosaki?
The most comfortable time to visit is typically May to July and September to October, when daytime highs sit near 22°C.