Weather in Busan in September 2025
Average weather
Average temperature in Busan in September
Going from a maximum of +28°C during the day to a minimum of +19°C during the night, the temperature in September averages around +26°C.
The average maximum temperature goes down 44% by the end of the month, compared with the beginning of the month, from +26°C to +22°C.
Is Busan warm or cold in September?
Busan is typically warm in September.
Maximum temperatures go down compared to the previous month from +28°C to +25°C. The minimum temperature also goes down from +24°C to +21°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Busan, here is the comparison with other months:
Climate in Busan in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +28°C | +25°C | +20°C | ||||
| Min. temperature | ||||||
| +18°C | +12°C | +4°C | ||||
| Max. temperature | ||||||
| +38°C | +33°C | +29°C | ||||
| Rainfall | ||||||
| 197 mm | 165 mm | 65 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 81% | 77% | 69% | ||||
| Air pressure | ||||||
| 1008 HPa | 1012 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 4 | 5 | 12 | ||||
| Cloudy days | ||||||
| 8 | 10 | 11 | ||||
| Rainy days | ||||||
| 18 | 14 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +28°C in the day, the average maximum temperature lowers to +25°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 197 mm to 165 mm. It feels drier, as humidity decreases from 81% to 77%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 4 to 5.
But maybe it is worth considering traveling in October as the weather gets better.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Busan is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Busan?
Climate Change over Years
The climate in Busan in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+16°C) and the highest in 2019 (+20°C). The driest year was 2008 with only 733 mm of rainfall, and the wettest year was 1999 with 2001 mm.
FAQ
Is September a good time to visit Busan?
Can you sunbathe in Busan in September?
Is Busan rainy in September?
Is it sunny in Busan in September?
Other cities in South Korea
Monthly weather in Busan
Source of the data
For this page, we’ve looked at the typical weather in Busan, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.