Temperature
Hot by day, warm at night.
August is among the hottest months, with some of the year’s highest rainfall totals and muggy conditions.

Hot by day, warm at night.
It rains on most days. About 19 wet days, more than in most months.
Cloudier spells limit sunshine.
Very hot days with very humid air.
In August, afternoons feel about 95° and nights feel near 85°.
Mostly cloudy skies this month.
Calm winds are typical in August.
August late afternoons are around 86°F, easing to about 82°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 44 | 35 | 8.2 | 24 | 7.5 | 76 |
| Feb | 45 | 36 | 7.4 | 18 | 7.9 | 74 |
| Mar | 56 | 43 | 6.9 | 17 | 9.0 | 69 |
| Apr | 66 | 52 | 6.6 | 13 | 9.4 | 67 |
| May | 73 | 60 | 7.6 | 15 | 10.1 | 70 |
| Jun | 81 | 70 | 8.1 | 16 | 9.6 | 77 |
| Jul | 89 | 78 | 8.4 | 20 | 9.6 | 79 |
| Aug | 90 | 79 | 10.9 | 19 | 10.4 | 77 |
| Sep | 84 | 74 | 8.3 | 17 | 8.6 | 80 |
| Oct | 72 | 60 | 6.9 | 15 | 8.4 | 77 |
| Nov | 62 | 50 | 7.4 | 15 | 7.3 | 75 |
| Dec | 49 | 41 | 10.0 | 25 | 7.0 | 76 |
Similar climates
Want a side-by-side climate view? Compare Toyama Bay with Nikko.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology