Climate in Busan — Annual Weather Overview
Busan has a continental climate — hot summers, cold winters and moderate rainfall. The hottest month is August (average high 28.8°C) and the coolest is January (7.4°C). The seasons are strongly defined — a 21.4°C swing between August highs and January lows. Annual rainfall totals around 1587mm. July is the wettest month at 335.7mm, while October averages just 20.2mm. Average daily sunshine is 8.6 hours.
**Spring (March, April, May):** average highs 17.5°C, 332mm rain. **Summer (June, July, August):** average highs 26.8°C, 829mm rain. **Autumn (September, October, November):** average highs 20.5°C, 292mm rain. **Winter (December, January, February):** average highs 8.2°C, 135mm rain.
Busan — Monthly Temperatures
Busan — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Busan stays reasonable all year.
Busan weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 7.4°C | -1.8°C | 55.2mm | 7.5h | 4 | 10/10 |
| February | 9.4°C | -0.0°C | 49.6mm | 8.7h | 5 | 10/10 |
| March | 14.2°C | 5.3°C | 96.7mm | 8.5h | 8 | 10/10 |
| April | 17.2°C | 8.8°C | 100.0mm | 9.3h | 6 | 10/10 |
| May | 21.0°C | 13.7°C | 135.1mm | 9.3h | 8 | 9/10 |
| June | 24.4°C | 18.8°C | 234.5mm | 8.9h | 11 | 8/10 |
| July | 27.1°C | 22.7°C | 335.7mm | 8.0h | 18 | 8/10 |
| August | 28.8°C | 24.1°C | 258.5mm | 9.2h | 17 | 8/10 |
| September | 25.3°C | 19.7°C | 226.2mm | 7.8h | 13 | 8/10 |
| October | 20.7°C | 12.4°C | 20.2mm | 9.0h | 4 | 10/10 |
| November | 15.5°C | 6.2°C | 45.1mm | 8.5h | 4 | 10/10 |
| December | 7.8°C | -1.3°C | 30.3mm | 8.0h | 3 | 10/10 |
For the full verdict on when to go, see the best time to visit Busan and the Busan rainy season guide. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Busan have?
Busan has a continental climate — hot summers, cold winters and moderate rainfall. Average highs range from 7.4°C in January to 28.8°C in August.
What is the hottest month in Busan?
August is the hottest month in Busan, with average highs of 28.8°C and lows of 24.1°C.
What is the coldest month in Busan?
January is the coolest month, with average highs of 7.4°C and lows of -1.8°C.
What is the wettest month in Busan?
July is the wettest month, averaging 335.7mm of rainfall over around 18 rainy days.
When is rainy season in Busan?
Rainy season in Busan runs April to September, when rainfall is significantly higher than the rest of the year. Full rainy season guide →
How much rain does Busan get per year?
Busan receives around 1587mm of rain per year. The driest month is October (20.2mm).
When is the best time to visit Busan?
The best time to visit Busan is All year. See the full month-by-month guide →
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For the packing side of things, our sister site has a ready-made checklist: Busan packing list at 247PackingList. For currency, language and country facts see the South Korea guide at 247CountryInfo.
Trip essentials for Busan
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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.