Hiroshima weather by month & the best time to visit
🇯🇵 Japan · major coastal city · humid subtropical climate
The best time to visit Hiroshima is October — its sunniest month (Sunshine Score 67/100), with August and May close behind. Hiroshima averages about 1,773 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 121 mm of rain in October.
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- Sun hours / year
- 1,773
- Sunniest month
- October
- Peak score
- 67/100
- Rain / year
- 1,527 mm
- Snow / year
- ≈12 cm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 30°C / 86°F
- Population
- 2M
- Elevation
- 329 m
When is the best time to visit Hiroshima?
For sunshine, the best time to visit Hiroshima is October, then August and May. The dullest month is January (0/100, 60 mm of rain). The full month-by-month picture is in the table below.
How sunny is Hiroshima?
Hiroshima isn't a sunny place by world standards: about 1,773 hours of sunshine a year. 67 Sunshine Score points separate October (67) from January (0), so the month you pick matters. It ranks #40 of 79 destinations in Japan for annual sunshine, right at the national median of 1,773 hours. The year's 1,527 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | -1° / 30°F | 60 mm | 2 | 14° / 57°F |
| February | 0 | 8° / 46°F | 0° / 32°F | 73 mm | 3 | 12° / 54°F |
| March | 17 | 11° / 52°F | 2° / 36°F | 104 mm | 4 | 12° / 54°F |
| April | 50 | 17° / 63°F | 6° / 43°F | 118 mm | 5 | 16° / 61°F |
| May | 63 | 22° / 72°F | 12° / 54°F | 142 mm | 6 | 18° / 64°F |
| June | 61 | 25° / 77°F | 17° / 63°F | 208 mm | 6 | 22° / 72°F |
| July | 61 | 28° / 82°F | 21° / 70°F | 240 mm | 7 | 26° / 79°F |
| August | 66 | 29° / 84°F | 22° / 72°F | 127 mm | 7 | 30° / 86°F |
| September | 61 | 26° / 79°F | 18° / 64°F | 179 mm | 6 | 29° / 84°F |
| October | 67 | 20° / 68°F | 12° / 54°F | 121 mm | 5 | 25° / 77°F |
| November | 44 | 15° / 59°F | 6° / 43°F | 76 mm | 3 | 21° / 70°F |
| December | 0 | 8° / 46°F | 1° / 34°F | 79 mm | 2 | 16° / 61°F |
Sea temperature in Hiroshima by month
The sea off Hiroshima is warmest in August at around 30°C / 86°F, and coolest in February at 12°C / 54°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Hiroshima on the interactive sunshine globe →
Nearby places for sunshine
- Iwakuni Japan · 70 km · best in Oct · 1,773 h sun/yr
- Matsuyama Japan · 71 km · best in Oct · 1,883 h sun/yr
- Okayama Japan · 93 km · best in Aug · 1,914 h sun/yr
- Takamatsu Japan · 104 km · best in May · 1,982 h sun/yr
- Izumo Japan · 109 km · best in May · 1,647 h sun/yr
- Kochi (Japan) Japan · 121 km · best in May · 1,922 h sun/yr
Nearest destinations
- Masuda Japan · 107 km · 1,655 h sun/yr · best in Oct
Head-to-head
How Hiroshima compares month by month: Hiroshima vs Okayama · Hiroshima vs Matsuyama · Hiroshima vs Izumo · Hiroshima vs Iwakuni · all comparisons
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