Climate - Nagoya (Japan)

In Nagoya, a city of Japan, located in the central part of Honshu Island, in Aichi Prefecture, the climate is humid temperate, with quite cold winters and hot, humid and rainy summers. Like the rest of Japan, the city is affected by the monsoon circulation: in winter, the northwest cold currents will prevail, while in summer, they will be replaced by hot and humid currents of tropical origin.
Nagoya is located a short distance from the sea, north of Ise Bay, in the Nobi Plain, an area famous for being particularly hot in summer.
In winter, there are mild periods, with highs around 12/15 °C (54/59 °F), but also cold and windy periods, with highs around 5/7 °C (41/45 °F) or less, and possible snowfalls (usually light). At night, there may be slight frosts.
In summer, hot and muggy periods, with sunshine, highs around 35 °C (95 °F) and above, tropical nights and high humidity, alternate with periods of bad weather, with wind and rain, and sometimes (especially in June) a little cool at night. August is the hottest month, both because of the thermal inertia of the sea and because of the lower frequency of periods of bad weather.
Here are the average temperatures.

Rainfall is abundant, in fact, it amounts to 1,500 millimeters (60 inches) per year. Winter is the driest season; the rainiest months are June, July and September. In August, there is a certain decrease in the frequency of rains: on average, among the summer months, it is the driest and sunniest as well as the hottest. Here is the average precipitation.

From June to October (but especially from August to early October), Nagoya can be affected by typhoons, the tropical cyclones of South-East Asia. On September 26, 1959, the city was hit hard by Typhoon Ise-wan (also called Vera).
The cherry blossoming in Nagoya takes place around April 1st.
The amount of sunshine in Nagoya is good in winter (from December to February, the sun shines more than half the time). In the other seasons, the sun does not shine very often because of both the disturbances that occur in spring and autumn and of the summer monsoon. In summer, August is sunnier than June and July. Here are the average sunshine hours per day.



The sea is warm enough for swimming, with a temperature of 23 °C (73 °F) or more, from July to October, as you can see in the following table.

Nagoya - Weather by month

Based on the period 1991-2020

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In January, the coldest month of the year, the weather in Nagoya is usually quite cold. The average temperature is of 4.7 °C (40 °F), with a minimum of 0.6 °C (33.1 °F) and a maximum of 8.8 °C (47.8 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (26 °F). However, it dropped to -5 °C (23 °F) in January 1995.
On the warmest days of the month, the temperature usually reaches around 13.5 °C (56 °F). However, it reached 17 °C (62.6 °F) in January 2020.
Precipitation amounts to 50 mm (2 in), distributed over 6 days.
The day lasts on average 10 hours and 5 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 63%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 15 °C (58.5 °F). Therefore, the sea is cold for swimming.

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In February, the weather in Nagoya is usually quite cold. The average temperature is of 5.6 °C (42 °F), with a minimum of 1.3 °C (34.3 °F) and a maximum of 10 °C (50 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -7 °C (19.4 °F) in February 1999.
On the warmest days of the month, the temperature usually reaches around 17 °C (62 °F). However, it reached 21 °C (69.8 °F) in February 2016.
Precipitation amounts to 65 mm (2.6 in), distributed over 7 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 59%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 13.5 °C (56.5 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Nagoya is usually mild. The average temperature is of 9.3 °C (49 °F), with a minimum of 4.8 °C (40.6 °F) and a maximum of 13.9 °C (57 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -1 °C (30 °F). However, it dropped to -2 °C (28.4 °F) in March 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 20.5 °C (69 °F). However, it reached 25 °C (77 °F) in March 2018.
Precipitation amounts to 115 mm (4.5 in), distributed over 10 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 56%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 13.5 °C (56.5 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Nagoya is usually very mild. The average temperature is of 14.9 °C (59 °F), with a minimum of 10.2 °C (50.3 °F) and a maximum of 19.6 °C (67.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to 0 °C (32 °F) in April 1993.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26.5 °C (79.5 °F). However, it reached 30 °C (86 °F) in April 1998.
Precipitation amounts to 130 mm (5.1 in), distributed over 10 days.
The day lasts on average 13 hours and 5 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 57%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 15 °C (58.5 °F). Therefore, the sea is cold for swimming.

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In May, the weather in Nagoya is usually warm. The average temperature is of 19.8 °C (68 °F), with a minimum of 15.3 °C (59.5 °F) and a maximum of 24.4 °C (76 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 9 °C (48.5 °F). However, it dropped to 4 °C (39.2 °F) in May 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 30.5 °C (87.5 °F). However, it reached 34 °C (93.2 °F) in May 2019.
Precipitation amounts to 150 mm (5.9 in), distributed over 11 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 61%.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 17.5 °C (63.5 °F). Therefore, the sea is cold for swimming.

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In June, the weather in Nagoya is usually warm to hot. The average temperature is of 23.7 °C (75 °F), with a minimum of 20 °C (67.9 °F) and a maximum of 27.4 °C (81.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 15.5 °C (59.5 °F). However, it dropped to 13 °C (55.4 °F) in June 1993.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 36 °C (96.8 °F) in June 2011.
Precipitation amounts to 185 mm (7.3 in), distributed over 13 days.
The day lasts on average 14 hours and 30 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 5 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 68%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 21 °C (70 °F). Therefore, the sea is cool for swimming.

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In July, the weather in Nagoya is usually very hot and muggy. The average temperature is of 27.7 °C (82 °F), with a minimum of 24 °C (75.2 °F) and a maximum of 31.3 °C (88.3 °F).
On the coldest nights of the month, the temperature usually drops to around 20.5 °C (68.5 °F). However, it dropped to 17 °C (62.6 °F) in July 1996.
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F). However, it reached 40 °C (104 °F) in July 2018.
Precipitation amounts to 210 mm (8.3 in), distributed over 13 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 5.5 hours of sunshine per day. So, the sun shines 38% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is 10 kph (7 mph).
The average sea temperature is of 24.5 °C (76 °F). Therefore, the sea is warm enough for swimming.

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In August, the warmest month of the year, the weather in Nagoya is usually very hot. The average temperature is of 28.9 °C (84 °F), with a minimum of 25 °C (76.9 °F) and a maximum of 32.9 °C (91.3 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F). However, it dropped to 18 °C (64.4 °F) in August 1993.
On the warmest days of the month, the temperature usually reaches around 37 °C (98 °F). However, it reached 39 °C (102.2 °F) in August 1994.
Precipitation amounts to 140 mm (5.5 in), distributed over 9 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 68%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 27 °C (80.5 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In September, the weather in Nagoya is usually warm to hot. The average temperature is of 25.0 °C (77 °F), with a minimum of 21.1 °C (70 °F) and a maximum of 28.8 °C (83.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 15 °C (58.5 °F). However, it dropped to 10 °C (50 °F) in September 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 38 °C (100.4 °F) in September 2010.
Precipitation amounts to 230 mm (9.1 in), distributed over 12 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 69%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 25.5 °C (78.5 °F). Therefore, the sea is warm enough for swimming.

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In October, the weather in Nagoya is usually warm. The average temperature is of 18.9 °C (66 °F), with a minimum of 14.7 °C (58.5 °F) and a maximum of 23.1 °C (73.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 8 °C (46.5 °F). However, it dropped to 4 °C (39.2 °F) in October 1997.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29 °C (84 °F). However, it reached 33 °C (91.4 °F) in October 2019.
Precipitation amounts to 165 mm (6.5 in), distributed over 10 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 67%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 23 °C (73 °F). Therefore, the sea can be considered barely acceptable for swimming.

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In November, the weather in Nagoya is usually mild. The average temperature is of 12.7 °C (55 °F), with a minimum of 8.4 °C (47.1 °F) and a maximum of 17.1 °C (62.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to 0 °C (32 °F) in November 1997.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 22.5 °C (72.5 °F). However, it reached 25 °C (77 °F) in November 2000.
Precipitation amounts to 80 mm (3.1 in), distributed over 7 days.
The day lasts on average 10 hours and 20 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 65%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 20 °C (68 °F). Therefore, the sea is very cool for swimming.

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In December, the weather in Nagoya is usually quite mild. The average temperature is of 7.2 °C (45 °F), with a minimum of 3 °C (37.4 °F) and a maximum of 11.3 °C (52.4 °F).
On the coldest nights of the month, the temperature usually drops to around -2 °C (28.5 °F). However, it dropped to -4 °C (24.8 °F) in December 1995.
On the warmest days of the month, the temperature usually reaches around 17 °C (63 °F). However, it reached 23 °C (73.4 °F) in December 2015.
Precipitation amounts to 55 mm (2.2 in), distributed over 8 days.
The day lasts on average 9 hours and 50 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 5.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 65%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 17 °C (63 °F). Therefore, the sea is cold for swimming.