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Climate in Aomori (Honshu)


Average weather, temperature, rainfall, sunshine hours

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Aomori (Honshu), position the map


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Climate chart - Aomori
Aomori has a humid temperate climate, with cold, snowy winters and warm to hot, rainy summers. Like the rest of Japan, the city is affected by the monsoon circulation: in winter, the northwest cold currents prevail, while in summer, they are replaced by hot and humid currents of tropical origin (although to a lesser extent than in central and southern Japan).
Aomori is a city of 270,000 inhabitants, located in Japan, in a bay, in the region called Tohoku, at almost 41 degrees north latitude.
We are on the northern tip of the island of Honshu, where the average temperature in January and February is slightly below freezing even on the coast.

Image of Aomori

Precipitation is abundant, since it amounts to 1,350 millimeters (53 inches) per year. Spring is the driest season.
Due to its location on the coast, exposed to cold winds from Siberia, which pick up moisture as they pass over the Sea of ​​Japan, and then are forced to rise when they meet the mountains just south of the city (the Hakkōda Mountains, which reach 1,585 meters or 5,200 feet), Aomori is a particularly snowy city.
Snowfall, which normally occurs from November to March, amounts to a whopping 565 cm (222 in) per year, making it one of the snowiest lowland cities in the world. The airport, located south of the city and at an altitude of 200 meters (650 ft), is a little colder and even snowier.
Even though it snows a lot and often, the temperatures are not that low, and during the day they often go above freezing. In fact, even in the middle of winter rain can occur, or rain mixed with snow.
During cold waves, the temperature in the city usually drops to -8/-10 °C (14/18 °F) while at the airport it can drop to -15/-16 °C (3/5 °F).

In summer, the average temperatures are not too high, in fact during periods of bad weather, a cool wind blows from the northeast called Yamase. However, in this season, sunny periods, with hot and humid conditions, can occur (though more rarely than in Tokyo), and alternate with periods of bad weather, with wind and rain.
During heat waves, the temperature can reach 35/36 °C (95/97 °F).

From June to October (but especially from August to early October), Aomori can be hit by typhoons, although generally with less frequency and intensity than in southern Japan.

The cherry blossom (Sakura) in Aomori usually occurs from late April to early May. In fact, the Hirosaki Cherry Blossom Festival, in Hirosaki Park, is held every year between April 23 and May 5.

Aomori - Climate data


In Aomori, the average temperature of the coldest month (January) is of -0.8 °C, that of the warmest month (August) is of 23.9 °C. Here are the average temperatures.
Aomori - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January-3.51.8-0.8
February-3.32.7-0.3
March-0.86.83
April4.113.78.9
May9.418.814.1
June14.122.118.1
July18.62622.3
August2027.823.9
September15.824.520.2
October9.118.313.7
November3.411.27.3
December-1.44.51.6
Year7.214.911

Precipitation amounts to 1350 millimeters per year: it is therefore quite abundant. It ranges from 68.7 millimeters in the driest month (April) to 155.2 millimeters in the wettest one (December). Here is the average precipitation.
Aomori - Average precipitation
MonthRain (mm)Days
January14022
February9918
March7514
April6911
May7710
June758
July1309
August14210
September13310
October11913
November13717
December15521
Year1350162

The sea temperature ranges from 6.5 °C in February, March to 22.5 °C in August. Here are the average sea temperatures.
Aomori - Sea temperature
MonthTemperatures (°C)
January8.5
February6.5
March6.5
April8
May11
June15
July19.5
August22.5
September22
October18.5
November14.5">
December11.5
Year13.7

There are on average around 1590 sunshine hours per year. Here are the average hours of sunshine per day.
Aomori - Sunshine hours
MonthAverageTotal
January1.550
February2.575
March4125
April6180
May6.5200
June6180
July5160
August5.5180
September5.5160
October4.5145
November385
December1.550
Year4.41590

Aomori - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January, the coldest month of the year, is generally a very cold month. The average temperature is of -0.8 °C, with a minimum of -3.5 °C and a maximum of 1.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -8 °C. However, it dropped to -10.9 °C in January 2014.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 7.5 °C. However, it reached 10.8 °C in January 1995.
Rain iconPrecipitation amounts to 139.9 mm, distributed over 22 days.
The day lasts on average 9 hours and 35 minutes.
Sun iconThere are on average 1.5 hours of sunshine per day. So, the sun shines 16% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 17.8 kph.
Sea iconThe average sea temperature is of 8.5 °C. Therefore, the sea is very cold for swimming.


February is generally a very cold month. The average temperature is of -0.3 °C, with a minimum of -3.3 °C and a maximum of 2.7 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -7.5 °C. However, it dropped to -10.9 °C in February 1991.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 9.5 °C. However, it reached 17.1 °C in February 2010.
Rain iconPrecipitation amounts to 99 mm, distributed over 18 days.
The day lasts on average 10 hours and 40 minutes.
Sun iconThere are on average 2.5 hours of sunshine per day. So, the sun shines 24% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of 17.6 kph.
Sea iconThe average sea temperature is of 6.4 °C. Therefore, the sea is very cold for swimming.


March is generally a cold month. The average temperature is of 3 °C, with a minimum of -0.8 °C and a maximum of 6.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -5.5 °C. However, it dropped to -8.1 °C in March 1995.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 15.5 °C. However, it reached 21.4 °C in March 2018.
Rain iconPrecipitation amounts to 75.2 mm, distributed over 14 days.
The day lasts on average 12 hours and 0 minutes.
Sun iconThere are on average 4 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 69%.
The average wind speed is of 18.6 kph.
Sea iconThe average sea temperature is of 6.3 °C. Therefore, the sea is very cold for swimming.


April is generally a mild month. The average temperature is of 8.9 °C, with a minimum of 4.1 °C and a maximum of 13.7 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -1 °C. However, it dropped to -2.6 °C in April 2015.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 22.5 °C. However, it reached 28.3 °C in April 1998.
Rain iconPrecipitation amounts to 68.7 mm, distributed over 11 days.
The day lasts on average 13 hours and 25 minutes.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 63%.
The average wind speed is of 18.3 kph.
Sea iconThe average sea temperature is of 7.8 °C. Therefore, the sea is very cold for swimming.


May is generally a mild month. The average temperature is of 14.1 °C, with a minimum of 9.4 °C and a maximum of 18.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 4 °C. However, it dropped to 1.3 °C in May 1993.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 27 °C. However, it reached 33.6 °C in May 2019.
Rain iconPrecipitation amounts to 76.7 mm, distributed over 10 days.
The day lasts on average 14 hours and 30 minutes. So the days are long.
Sun iconThere are on average 6.5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 67%.
The average wind speed is of 16.2 kph.
Sea iconThe average sea temperature is of 10.8 °C. Therefore, the sea is very cold for swimming.


June is generally a warm month. The average temperature is of 18.1 °C, with a minimum of 14.1 °C and a maximum of 22.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 9.5 °C. However, it dropped to 6.8 °C in June 2011.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 29 °C. However, it reached 32.3 °C in June 2010.
Rain iconPrecipitation amounts to 75 mm, distributed over 8 days.
The day lasts on average 15 hours and 5 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 12.5 kph.
Sea iconThe average sea temperature is of 15.2 °C. Therefore, the sea is cold for swimming.


July is generally a warm month. The average temperature is of 22.3 °C, with a minimum of 18.6 °C and a maximum of 26 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 14 °C. However, it dropped to 9.3 °C in July 1993.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 32.5 °C. However, it reached 35.9 °C in July 2017.
Rain iconPrecipitation amounts to 129.5 mm, distributed over 9 days.
The day lasts on average 14 hours and 40 minutes. So the days are long.
Sun iconThere are on average 5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of 12.5 kph.
Sea iconThe average sea temperature is of 19.4 °C. Therefore, the sea is very cool for swimming.


August, the warmest month of the year, is generally a warm to hot, muggy month. The average temperature is of 23.9 °C, with a minimum of 20 °C and a maximum of 27.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 15 °C. However, it dropped to 10.7 °C in August 2001.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 33.5 °C. However, it reached 36.7 °C in August 1994.
Rain iconPrecipitation amounts to 142 mm, distributed over 10 days.
The day lasts on average 13 hours and 40 minutes.
Sun iconThere are on average 5.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 11.5 kph.
Sea iconThe average sea temperature is of 22.6 °C. Therefore, the sea can be considered barely acceptable for swimming.


September is generally a warm month. The average temperature is of 20.2 °C, with a minimum of 15.8 °C and a maximum of 24.5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 9.5 °C. However, it dropped to 5.9 °C in September 2001.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 31 °C. However, it reached 36.1 °C in September 2012.
Rain iconPrecipitation amounts to 133 mm, distributed over 10 days.
The day lasts on average 12 hours and 25 minutes.
Sun iconThere are on average 5.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 11.5 kph.
Sea iconThe average sea temperature is of 21.8 °C. Therefore, the sea is cool for swimming.


October is generally a mild month. The average temperature is of 13.7 °C, with a minimum of 9.1 °C and a maximum of 18.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 3.5 °C. However, it dropped to 0.2 °C in October 2016.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 24.5 °C. However, it reached 27.6 °C in October 2019.
Rain iconPrecipitation amounts to 119.2 mm, distributed over 13 days.
The day lasts on average 11 hours and 5 minutes.
Sun iconThere are on average 4.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of 13.7 kph.
Sea iconThe average sea temperature is of 18.4 °C. Therefore, the sea is very cool for swimming.


November is generally a quite mild month. The average temperature is of 7.3 °C, with a minimum of 3.4 °C and a maximum of 11.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -2 °C. However, it dropped to -7.4 °C in November 1998.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 19.5 °C. However, it reached 24.1 °C in November 2020.
Rain iconPrecipitation amounts to 137.4 mm, distributed over 17 days.
The day lasts on average 9 hours and 55 minutes.
Sun iconThere are on average 3 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of 16.2 kph.
Sea iconThe average sea temperature is of 14.7 °C. Therefore, the sea is very cold for swimming.


December is generally a cold month. The average temperature is of 1.6 °C, with a minimum of -1.4 °C and a maximum of 4.5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -6 °C. However, it dropped to -8.9 °C in December 2002.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 12 °C. However, it reached 18.6 °C in December 2018.
Rain iconPrecipitation amounts to 155.2 mm, distributed over 21 days.
The day lasts on average 9 hours and 20 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
Sun iconThere are on average 1.5 hours of sunshine per day. So, the sun shines 17% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 17.6 kph.
Sea iconThe average sea temperature is of 11.5 °C. Therefore, the sea is very cold for swimming.

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