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Monthly climate in Nagasaki, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Nagasaki features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (47 °F) and 28 °C (82 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 33 °C (93 °F).The average annual precipitation amounts to about 2254 mm (88.7 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually.Nagasaki enjoys an average of 2991 hours of sunshine throughout the year, and daylight varies from 10 hours 1 minutes to 14 hours 15 minutes per day.

Monthly average temperatures in Nagasaki, Japan §

The warmest months in Nagasaki are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (77 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (47 - 51 °F) throughout the day. On average each year, Nagasaki experiences 81 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nagasaki, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 18°C
(65°F)		 17°C
(63°F)		 20°C
(68°F)		 23°C
(73°F)		 25°C
(77°F)		 27°C
(81°F)		 32°C
(89°F)		 33°C
(93°F)		 32°C
(90°F)		 28°C
(83°F)		 23°C
(74°F)		 22°C
(71°F)
Mean maximum 16°C
(60°F)		 15°C
(60°F)		 18°C
(65°F)		 21°C
(70°F)		 24°C
(75°F)		 26°C
(79°F)		 30°C
(86°F)		 32°C
(90°F)		 30°C
(86°F)		 27°C
(80°F)		 22°C
(72°F)		 18°C
(65°F)
Average high 10°C
(51°F)		 11°C
(51°F)		 14°C
(58°F)		 17°C
(64°F)		 21°C
(70°F)		 24°C
(76°F)		 27°C
(82°F)		 29°C
(85°F)		 27°C
(80°F)		 23°C
(73°F)		 17°C
(64°F)		 12°C
(54°F)
Daily mean 8°C
(47°F)		 9°C
(48°F)		 12°C
(54°F)		 15°C
(60°F)		 19°C
(67°F)		 22°C
(73°F)		 26°C
(79°F)		 28°C
(82°F)		 25°C
(77°F)		 20°C
(69°F)		 15°C
(60°F)		 10°C
(51°F)
Average low 7°C
(44°F)		 7°C
(44°F)		 10°C
(50°F)		 13°C
(56°F)		 17°C
(63°F)		 21°C
(70°F)		 25°C
(77°F)		 26°C
(79°F)		 23°C
(74°F)		 19°C
(66°F)		 14°C
(57°F)		 9°C
(48°F)
Mean minimum 2°C
(37°F)		 2°C
(36°F)		 6°C
(42°F)		 9°C
(48°F)		 13°C
(56°F)		 18°C
(65°F)		 22°C
(72°F)		 24°C
(75°F)		 20°C
(68°F)		 15°C
(58°F)		 9°C
(48°F)		 4°C
(39°F)
Minimum -0°C
(32°F)		 0°C
(33°F)		 5°C
(41°F)		 7°C
(46°F)		 12°C
(54°F)		 18°C
(64°F)		 21°C
(70°F)		 21°C
(69°F)		 19°C
(66°F)		 14°C
(57°F)		 8°C
(46°F)		 2°C
(36°F)

Compare climate in Nagasaki with other places

Compare temperature, precipitation, sunshine, UV index in Nagasaki, Japan with other places around the world.

Monthly average precipitation in Nagasaki, Japan §

Nagasaki usually has the most precipitation in June, July and August, with an average of 15 rainy days and 347 mm (13.7 inches) of precipitation per month.The driest months in Nagasaki are January, November and December. On average, 78 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nagasaki, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 61 (2.4) 106 (4.2) 157 (6.2) 143 (5.6) 229 (9.0) 272 (10.7) 442 (17.4) 326 (12.8) 225 (8.9) 117 (4.6) 81 (3.2) 92 (3.6)
Average precipitation days (≥ 1 mm) 8 10 12 9 11 14 18 14 14 8 9 8

Monthly sunshine hours in Nagasaki, Japan §

The sunniest months in Nagasaki are April, May and August, when the sun shines an average of 9 hours 22 minutes a day.Least sunny months in Nagasaki: January, February and December receive an average of 6 hours 24 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nagasaki, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 167 225 261 281 279 259 271 301 260 259 232 190
Mean daily daylight hours 10h 14m 11h 0m 11h 58m 12h 59m 13h 49m 14h 15m 14h 2m 13h 18m 12h 20m 11h 20m 10h 28m 10h 1m

Solar UV radiation in Nagasaki, Japan §

Nagasaki experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Nagasaki UV Index data.

Average daily maximum UV levels by month for Nagasaki, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 6 8 11 11 11 12 12 11 8 6 4