Hachijojima weather by month & the best time to visit
🇯🇵 Japan · beach resort · humid subtropical climate
The best time to visit Hachijojima is August — its sunniest month (Sunshine Score 64/100), with November and May close behind. Hachijojima averages about 1,827 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 140 mm of rain in August.
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- Sun hours / year
- 1,827
- Sunniest month
- August
- Peak score
- 64/100
- Rain / year
- 1,960 mm
- Midday UV at peak
- 9 (very high)
- Sea at warmest
- 29°C / 84°F
- Population
- 7k
- Elevation
- 89 m
When is the best time to visit Hachijojima?
For sunshine, the best time to visit Hachijojima is August, then November and May. The dullest month is January (42/100, 90 mm of rain). The full month-by-month picture is in the table below.
How sunny is Hachijojima?
Hachijojima gets a moderate 1,827 hours of sunshine a year. August (64/100) is noticeably better than January (42). It ranks #28 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. The year's 1,960 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 | 42 | 15° / 59°F | 12° / 54°F | 90 mm | 2 | 21° / 70°F |
| February | 42 | 15° / 59°F | 12° / 54°F | 96 mm | 3 | 20° / 68°F |
| March | 43 | 16° / 61°F | 14° / 57°F | 137 mm | 5 | 20° / 68°F |
| April | 51 | 18° / 64°F | 16° / 61°F | 157 mm | 6 | 21° / 70°F |
| May | 62 | 21° / 70°F | 19° / 66°F | 205 mm | 7 | 23° / 73°F |
| June | 62 | 23° / 73°F | 22° / 72°F | 276 mm | 7 | 25° / 77°F |
| July | 62 | 26° / 79°F | 25° / 77°F | 175 mm | 8 | 28° / 82°F |
| August | 64 | 28° / 82°F | 27° / 81°F | 140 mm | 9 | 29° / 84°F |
| September | 62 | 27° / 81°F | 26° / 79°F | 214 mm | 7 | 29° / 84°F |
| October | 62 | 24° / 75°F | 23° / 73°F | 217 mm | 5 | 28° / 82°F |
| November | 63 | 21° / 70°F | 19° / 66°F | 142 mm | 3 | 25° / 77°F |
| December | 52 | 17° / 63°F | 15° / 59°F | 111 mm | 2 | 22° / 72°F |
Sea temperature in Hachijojima by month
The sea off Hachijojima is warmest in August at around 29°C / 84°F, and coolest in February at 20°C / 68°F. The water sits at a comfortable 21°C or warmer roughly 10 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Hachijojima on the interactive sunshine globe →
Nearby places for sunshine
- Shizuoka Japan · 238 km · best in May · 2,035 h sun/yr
- Tokyo Japan · 271 km · best in Aug · 1,958 h sun/yr
- Nagoya Japan · 336 km · best in May · 1,906 h sun/yr
- Ibaraki Japan · 346 km · best in May · 1,948 h sun/yr
- Osaka Japan · 444 km · best in May · 1,831 h sun/yr
- Kobe Japan · 454 km · best in May · 1,831 h sun/yr
Nearest destinations
- Miyakejima Japan · 109 km · 1,871 h sun/yr · best in Nov
- Izu Oshima Japan · 189 km · 1,871 h sun/yr · best in May
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