Temperature
Hot by day, warm at night.
Hot afternoons and plenty of sun. Storm-season showers and humid air are the main drawbacks.

Hot by day, warm at night.
Several rainy days, mostly brief and on-and-off. About 9 wet days this month.
A mix of sunshine and cloud.
Very humid air is a major factor this month.
In August, afternoons feel about 91° and nights feel near 87°.
Partly cloudy skies this month.
Calm winds are typical in August.
August late afternoons are around 86°F, easing to about 83°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 49 | 41 | 2.0 | 8 | 8.0 | 65 |
| Feb | 50 | 42 | 2.4 | 8 | 8.5 | 65 |
| Mar | 55 | 46 | 4.0 | 11 | 8.8 | 66 |
| Apr | 63 | 54 | 4.6 | 10 | 9.2 | 69 |
| May | 71 | 62 | 5.1 | 10 | 9.9 | 73 |
| Jun | 76 | 69 | 7.1 | 12 | 8.6 | 79 |
| Jul | 83 | 76 | 6.6 | 12 | 9.8 | 81 |
| Aug | 86 | 79 | 3.7 | 9 | 10.5 | 77 |
| Sep | 80 | 73 | 6.1 | 11 | 8.9 | 73 |
| Oct | 72 | 64 | 4.7 | 9 | 8.3 | 68 |
| Nov | 62 | 54 | 2.3 | 7 | 8.0 | 67 |
| Dec | 53 | 45 | 2.1 | 8 | 8.1 | 66 |
Similar climates
Want a side-by-side climate view? Compare Okayama with Tokyo.
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: Aug 26, 2026
Data & methodology