Climate in Osaka — Annual Weather Overview
Osaka has a continental climate — hot summers, cold winters and moderate rainfall. The hottest month is August (average high 32.5°C) and the coolest is January (9.3°C). The seasons are strongly defined — a 23.2°C swing between August highs and January lows. Annual rainfall totals around 1796mm. July is the wettest month at 281.2mm, while December averages just 47.3mm. Average daily sunshine is 8.6 hours.
**Spring (March, April, May):** average highs 18.7°C, 487mm rain. **Summer (June, July, August):** average highs 29.9°C, 685mm rain. **Autumn (September, October, November):** average highs 23.3°C, 464mm rain. **Winter (December, January, February):** average highs 10.4°C, 160mm rain.
Osaka — Monthly Temperatures
Osaka — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Osaka stays reasonable all year.
Osaka weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 9.3°C | 1.3°C | 55.7mm | 7.4h | 6 | 10/10 |
| February | 10.2°C | 1.5°C | 56.9mm | 7.8h | 6 | 10/10 |
| March | 15.0°C | 5.3°C | 118.6mm | 8.3h | 10 | 9/10 |
| April | 18.4°C | 9.2°C | 164.6mm | 8.9h | 9 | 9/10 |
| May | 22.8°C | 14.4°C | 203.8mm | 9.0h | 13 | 8/10 |
| June | 26.7°C | 19.5°C | 216.3mm | 8.4h | 13 | 8/10 |
| July | 30.4°C | 24.0°C | 281.2mm | 9.2h | 18 | 8/10 |
| August | 32.5°C | 25.6°C | 187.8mm | 10.3h | 14 | 9/10 |
| September | 29.6°C | 22.1°C | 215.1mm | 8.9h | 14 | 8/10 |
| October | 22.6°C | 13.7°C | 157.9mm | 8.5h | 8 | 9/10 |
| November | 17.7°C | 8.6°C | 90.7mm | 8.1h | 7 | 10/10 |
| December | 11.6°C | 2.9°C | 47.3mm | 8.1h | 6 | 10/10 |
For the full verdict on when to go, see the best time to visit Osaka and the Osaka rainy season guide. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Osaka have?
Osaka has a continental climate — hot summers, cold winters and moderate rainfall. Average highs range from 9.3°C in January to 32.5°C in August.
What is the hottest month in Osaka?
August is the hottest month in Osaka, with average highs of 32.5°C and lows of 25.6°C.
What is the coldest month in Osaka?
January is the coolest month, with average highs of 9.3°C and lows of 1.3°C.
What is the wettest month in Osaka?
July is the wettest month, averaging 281.2mm of rainfall over around 18 rainy days.
When is rainy season in Osaka?
Rainy season in Osaka runs March to October, when rainfall is significantly higher than the rest of the year. Full rainy season guide →
How much rain does Osaka get per year?
Osaka receives around 1796mm of rain per year. The driest month is December (47.3mm).
When is the best time to visit Osaka?
The best time to visit Osaka is All year. See the full month-by-month guide →
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Trip essentials for Osaka
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.