Hiroshima Weather

Hiroshima has a humid subtropical climate characterized by cool to mild winters and hot, humid summers. Like much of Japan, Hiroshima experiences a seasonal temperature lag in summer; with August rather than July being the warmest month of the year. Precipitation occurs year-round, although winter is the driest season. Rainfall peaks in June and July, with August experiencing sunnier and drier conditions.

Average Temperature
Jan
50 °F
10 °C
Feb
52 °F
11 °C
Mar
55 °F
13 °C
Apr
64 °F
18 °C
May
75 °F
24 °C
Jun
77 °F
25 °C
Jul
82 °F
28 °C
Aug
86 °F
30 °C
Sep
83 °F
29 °C
Oct
72 °F
22 °C
Nov
64 °F
18 °C
Dec
54 °F
12 °C
Humidity
Jan
63%
Feb
64%
Mar
63%
Apr
61%
May
59%
Jun
76%
Jul
88%
Aug
82%
Sep
84%
Oct
75%
Nov
72%
Dec
71%
Rain
Jan
16mm
Feb
43mm
Mar
52mm
Apr
54mm
May
41mm
Jun
157mm
Jul
163mm
Aug
133mm
Sep
72mm
Oct
63mm
Nov
10mm
Dec
74mm
Clouds
Jan
37%
Feb
64%
Mar
51%
Apr
54%
May
70%
Jun
73%
Jul
80%
Aug
78%
Sep
63%
Oct
59%
Nov
55%
Dec
62%
Air quality US AQI
Jan
56
Feb
62
Mar
65
Apr
68
May
66
Jun
62
Jul
65
Aug
61
Sep
53
Oct
50
Nov
54
Dec
50
Sun
Jan
3UVI
Feb
4UVI
Mar
5UVI
Apr
6UVI
May
5UVI
Jun
5UVI
Jul
5UVI
Aug
6UVI
Sep
7UVI
Oct
5UVI
Nov
4UVI
Dec
2UVI