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August is the hottest month in Osaka, with an average high of 34°C / 93°F; January is the coldest (10°C / 49°F). June is the wettest month, averaging 176 mm / 6.9 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | 10 / 49 | 3 / 37 | 42 / 1.7 | 5 |
| Feb | 11 / 51 | 3 / 37 | 57 / 2.2 | 6 |
| Mar | 14 / 58 | 6 / 42 | 96 / 3.8 | 9 |
| Apr | 20 / 68 | 11 / 51 | 97 / 3.8 | 8 |
| May | 25 / 77 | 16 / 60 | 126 / 5.0 | 8 |
| Jun | 28 / 82 | 20 / 68 | 176 / 6.9 | 10 |
| Jul | 32 / 89 | 25 / 76 | 166 / 6.5 | 9 |
| Aug | 34 / 93 | 26 / 78 | 108 / 4.3 | 6 |
| Sep | 30 / 85 | 22 / 71 | 138 / 5.4 | 8 |
| Oct | 24 / 75 | 16 / 60 | 126 / 5.0 | 7 |
| Nov | 18 / 64 | 10 / 50 | 68 / 2.7 | 6 |
| Dec | 12 / 54 | 5 / 41 | 54 / 2.1 | 6 |
Extremes since 1953: highest 39°C / 102°F (August 8, 1994), lowest -8°C / 18°F (February 28, 1984).
Daylight lasts about 14.3 hours in June and 9.7 hours in December.
Data: Meteostat — Osaka, 1991–2020 averages.
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