The climate of Nagasaki
Nagasaki, situated in the northwestern region of Kyushu Island in
Japan, is characterized by a humid subtropical climate, as per the Köppen climate classification (designated as Cfa). The climate exudes a fundamental quality of tepidity throughout the year, marked by hot, humid summers and mild, chilly winters. An outstanding characteristic of Nagasaki's weather is its high level of precipitation and high relative humidity.
Throughout the range of twelve months, a varied spectrum of temperatures and weather conditions can be observed in Nagasaki. The city tends to realize the warmest temperatures from
July to
September, with an average high ranging from 30.1°C (86.2°F) in July to 28.6°C (83.5°F) in September. Conversely, the coldest temperature tends to be witnessed between
December and
February, with the average low extending from 5.9°C (42.6°F) in December to 3.8°C (38.8°F) in February. In terms of rainfall, the highest volume is registered from
June to July, realizing an average precipitation level from 315mm (12.4") in June to 314mm (12.36") in July.
The level of relative humidity in Nagasaki is rather high all year round, with slight fluctuations. The highest average humidity, around 80%, tends to be noticed between June and July, while the lowest average humidity, about 64%, is experienced during February. Remarkably, snowfall is also a component of the city's weather but considerably infrequent and primarily limited to
January and December, with snowfall measures at 20mm (0.79") and 10mm (0.39") respectively.
The best time to visit Nagasaki
The ideal time to travel to
Nagasaki would be in the spring period from
April to
June. During these months, temperatures are reasonably moderate with April highs about 19.7°C (67.5°F) and dropping to lows around 11.6°C (52.9°F). The rainfall tends to be relatively light with approximately 151mm (5.94") falling in April. Besides, the weather conditions encapsulate comfortable humidity levels and appreciable daylight, which contribute to a hospitable environment for outdoor activities.
The worst time to visit Nagasaki
Traveling to
Nagasaki might be quite challenging during the summer months of
June and
July, classified by torrential rainfall. During these months, the city experiences heavy downpours with rainfall levels reaching a colossal 315mm (12.4") in June and 314mm (12.36") in July. Notably, these conditions can disrupt outdoor sightseeing plans and create unwelcome travel disruptions.
Spring weather in Nagasaki
The spring season in
Nagasaki, stretching from
March to
May, marks a transition from winter's cold to summer's warmth. The period witnesses mellow warm temperatures, with average highs ranging from 14.8°C (58.6°F) in March to 23.5°C (74.3°F) in May, and lows varying from 7.3°C (45.1°F) to 15.8°C (60.4°F). An uptick in rainfall can be detected with levels progressively increasing from 132mm (5.2") in March to 179mm (7.05") in May, signifying the imminent arrival of the rain-drenched summer season.
Summer weather in Nagasaki
The summer months in
Nagasaki, from
June to
August, are characterized by extreme heat and copious rainfall. The average temperatures rise steeply with highs oscillating from 26.4°C (79.5°F) in June to 31.7°C (89.1°F) in August while the lows remain warm, recorded from 20°C (68°F) to 25.1°C (77.2°F). Notably, June and
July experience the harshest rainy conditions, drawing in more than 300mm (11.81") of precipitation.
Autumn weather in Nagasaki
Autumn, extending from
September to
November, revels in mild weather with a steady reduction in temperature and rainfall in
Nagasaki. During this period, average high temperatures gradually decrease from 28.6°C (83.5°F) in September to 18.3°C (64.9°F) in November. Simultaneously, the average low temperatures have a downward tilt too, dipping from 21.8°C (71.2°F) in September to 10.8°C (51.4°F) in November. The rainfall amount sees a drastic reduction as it almost halves from 189mm (7.44") in September to 86mm (3.39") in November.
Winter weather in Nagasaki
The winter season in
Nagasaki, covering
December to
February, is marked by cooler temperatures and reduced rainfall. The average high temperature during this season ranges from 13.1°C (55.6°F) in December to 10.4°C (50.7°F) in February, while the average low is clocked at 5.9°C (42.6°F) in December dropping to 3.8°C (38.8°F) in February. Despite these chilly conditions, the city enjoys a generally snow-free winter - except for the light snowfall recorded in
January and December.
Weather in January
January in
Nagasaki,
Japan ushers in the new year with an average high temperature of 10.4°C (50.7°F) and a low temperature of 3.8°C (38.8°F). This month is significantly colder compared to the temperatures experienced in
December of the previous year.
Weather in January » Weather in February
February sees a slight increase in temperatures from 10.4°C (50.7°F) to 11.7°C (53.1°F) in the high range, and from 3.8°C (38.8°F) to 4.4°C (39.9°F) in the low. Relative humidity rises slightly compared to
January, creating a sense of dampness in the air.
Weather in February » Weather in March
A noticeable change in weather sets in during the month of
March in
Nagasaki,
Japan. The city experiences an average high of 14.8°C (58.6°F) and a low of 7.3°C (45.1°F). The area also records its third highest rainfall for the year, averaging 132mm (5.2") for the month.
Weather in March »
Weather in April
The city of
Nagasaki fully embraces spring in
April, with the temperatures soaring from a high of 14.8°C (58.6°F) in
March to 19.7°C (67.5°F), and the lows moving up from 7.3°C (45.1°F) to 11.6°C (52.9°F). The jump in temperatures is accompanied by the highest recorded level of rainfall, with an average of 151mm (5.94").
Weather in April »Weather in May
In
May,
Nagasaki,
Japan sees a marked increase in average temperatures, from 19.7°C (67.5°F) to 23.5°C (74.3°F) on the higher end, and 11.6°C (52.9°F) to 15.8°C (60.4°F) on the lower spectrum. The city experiences its second highest rainfall for the year, averaging 179mm (7.05") for the month.
Weather in May »Weather in June
June in
Nagasaki introduces the summer season in full swing, with average high temperatures registering at 26.4°C (79.5°F) and lows at 20°C (68°F). A significant pattern emerges in June, which records the highest rainfall of 315mm (12.4"), signaling the onset of the monsoon cycle.
Weather in June »
Weather in July
Nagasaki swelters in
July with the thermometer spiking to an average high of 30.1°C (86.2°F) and a low of 24.3°C (75.7°F). The city records the same amount of rainfall as it did in
June, with 314mm (12.36"). This is indicative of the summer monsoon season in full effect, bringing bouts of heavy rain.
Weather in July » Weather in August
In
Nagasaki,
Japan,
August suffers the highest average high temperature of 31.7°C (89.1°F) and a low of 25.1°C (77.2°F). Despite the heat, it is a popular month for beachgoers, especially with the sea temperature at a year-high average of 27.7°C (81.9°F).
Weather in August »Weather in September
September brings the first signs of fall to
Nagasaki with a decline in temperature from 31.7°C (89.1°F) to 28.6°C (83.5°F) in the higher range, and from 25.1°C (77.2°F) to 21.8°C (71.2°F) on the low end. A slight decrease in rainfall to 189mm (7.44") signals the definitive end of the monsoon season.
Weather in September »
Weather in October
October in
Nagasaki sees a significant dip in temperature both in daytime highs, which average 23.8°C (74.8°F), and lows, registering at 16.1°C (61°F). The rainfall struggles in the city dwindle to 86mm (3.39"), marking a sharp decline from previous months.
Weather in October » Weather in November
November brings further cooling to
Nagasaki with the average high and low temperatures dropping to 18.3°C (64.9°F) and 10.8°C (51.4°F) respectively. The average rainfall stands at 86mm (3.39"), nearly identical to the previous month.
Weather in November » Weather in December
Finally, the year in
Nagasaki comes full circle with
December introducing the winter environment, dipping the average high and low temperatures to 13.1°C (55.6°F) and 5.9°C (42.6°F) respectively. After a long period of no snowfall from
April to
November, snow again becomes a possibility in December with an average of 10mm (0.39").
Weather in December » [Resources]