Climate of Okayama Prefecture, Japan
Area-weighted average across Okayama Prefecture. For where people actually live and travel, see the cities below.
Okayama Prefecture, a subdivision of Japan, has a seasonal climate on average. Area-weighted monthly temperatures across the whole territory range from 2.2°C / 36°F in January to 25.6°C / 78.1°F in August, with rainfall from 49 mm / 1.9 in to 232 mm / 9.1 in depending on the season (1554 mm / 61.2 in total across the year). See the city listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 2.2°C36°F | 58 mm2.3″ | — |
| February | 2.5°C36.5°F | 70 mm2.8″ | — |
| March | 5.7°C42.3°F | 98 mm3.9″ | — |
| April | 11.5°C52.7°F | 138 mm5.4″ | — |
| May | 16.3°C61.3°F | 147 mm5.8″ | — |
| June | 20.4°C68.7°F | 227 mm8.9″ | — |
| July | 24.7°C76.5°F | 232 mm9.1″ | — |
| August | 25.6°C78.1°F | 135 mm5.3″ | — |
| September | 21.3°C70.3°F | 216 mm8.5″ | — |
| October | 15.2°C59.4°F | 110 mm4.3″ | — |
| November | 9.7°C49.5°F | 74 mm2.9″ | — |
| December | 4.7°C40.5°F | 49 mm1.9″ | — |
Frequently asked questions
What is the best time to visit Okayama Prefecture?
Okayama Prefecture, Japan does not have a clear sunny-and-dry window by our cutoffs. The warmest month is August at 25.6°C / 78.1°F, and the driest is December at 49 mm / 1.9 in — likely your best travel window. For city-level detail, see the cities section below.
What is the climate of Okayama Prefecture?
Okayama Prefecture, Japan has area-weighted monthly average temperatures ranging from 2.2°C / 36°F in January to 25.6°C / 78.1°F in August. Annual rainfall averages about 1554 mm / 61.2 in, with the wettest month being July (232 mm / 9.1 in) and the driest December (49 mm / 1.9 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Okayama Prefecture?
The hottest month in Okayama Prefecture is August, with an area-wide average temperature of 25.6°C / 78.1°F.
What is the coldest month in Okayama Prefecture?
The coldest month in Okayama Prefecture is January, with an area-wide average temperature of 2.2°C / 36°F.
When does it rain most in Okayama Prefecture?
The wettest month in Okayama Prefecture is July, averaging about 232 mm / 9.1 in of rainfall. The driest is December with about 49 mm / 1.9 in.