Nagasaki Weather

Nagasaki has the typical humid subtropical climate of Kyūshū and Honshū, characterized by mild winters and long, hot, and humid summers. Apart from Kanazawa and Shizuoka it is the wettest sizeable city in Japan. In the summer, the combination of persistent heat and high humidity results in unpleasant conditions, with wet-bulb temperatures sometimes reaching 26 °C (79 °F). In the winter, however, Nagasaki is drier and sunnier than Gotō to the west, and temperatures are slightly milder than further inland in Kyūshū. Since records began in 1878, the wettest month has been July 1982, with 1,178 millimetres (46 in) including 555 millimetres (21.9 in) in a single day, whilst the driest month has been September 1967, with 1.8 millimetres (0.07 in). Precipitation occurs year-round, though winter is the driest season; rainfall peaks sharply in June and July. August is the warmest month of the year. On January 24, 2016, a snowfall of 17 centimetres (6.7 in) was recorded.

Average Temperature
Jan
54 °F
12 °C
Feb
54 °F
12 °C
Mar
59 °F
15 °C
Apr
66 °F
19 °C
May
73 °F
23 °C
Jun
77 °F
25 °C
Jul
81 °F
27 °C
Aug
86 °F
30 °C
Sep
84 °F
29 °C
Oct
75 °F
24 °C
Nov
66 °F
19 °C
Dec
57 °F
14 °C
Humidity
Jan
58%
Feb
61%
Mar
63%
Apr
68%
May
68%
Jun
77%
Jul
88%
Aug
80%
Sep
82%
Oct
73%
Nov
66%
Dec
66%
Rain
Jan
12mm
Feb
56mm
Mar
71mm
Apr
65mm
May
44mm
Jun
175mm
Jul
191mm
Aug
144mm
Sep
81mm
Oct
62mm
Nov
28mm
Dec
71mm
Clouds
Jan
36%
Feb
60%
Mar
49%
Apr
59%
May
70%
Jun
75%
Jul
87%
Aug
80%
Sep
44%
Oct
50%
Nov
38%
Dec
62%
Sun
Jan
4UVI
Feb
4UVI
Mar
5UVI
Apr
7UVI
May
5UVI
Jun
7UVI
Jul
5UVI
Aug
6UVI
Sep
6UVI
Oct
6UVI
Nov
4UVI
Dec
3UVI