Osaka Climate by Month – Rainy Season, Temperature Averages
Summary
The climate figures for Osaka are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,733 mm.
The rainy season runs March–October. The wettest month is July with 240.9 mm across 16 rain days; the driest is January at just 50 mm.
The hottest month is August (average high 32.8°C) and the coolest is January (9.1°C).
The most comfortable time to visit Osaka is January — less rain and milder heat.
Monthly averages · 2016–2025
| Monthly averages | High | Low | Rainfall | Rainy season |
|---|---|---|---|---|
| January | 9.1° | 1.2° | 50 mm | 6 |
| February | 9.9° | 1.4° | 62 mm | 7 |
| March | 14.1° | 4.7° | 110 mm | 11 |
| April | 19.0° | 9.6° | 148 mm | 10 |
| May | 23.1° | 14.4° | 189 mm | 12 |
| June | 26.7° | 19.2° | 237 mm | 14 |
| July | 31.0° | 24.3° | 241 mm | 16 |
| August | 32.8° | 25.6° | 160 mm | 13 |
| September | 29.3° | 22.1° | 213 mm | 15 |
| October | 22.9° | 14.9° | 193 mm | 11 |
| November | 17.2° | 8.5° | 74 mm | 7 |
| December | 11.5° | 3.4° | 56 mm | 7 |