Weather in Seoul in August 2025
- August is usually the hottest month of the year in Seoul;
Average weather
Average temperature in Seoul in August
The temperature in August is +30°C on average, with a range between a maximum of +35°C during the day and a minimum of +18°C at night.
The average maximum temperature goes down 41% by the end of the month, compared with the beginning of the month, from +34°C to +27°C.
Is Seoul warm or cold in August?
Seoul is typically warm in August.
Maximum temperatures go up compared to the previous month from +29°C to +30°C. The minimum temperature also goes up from +22°C to +22°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Seoul, here is the comparison with other months:
Climate in Seoul in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +30°C | +26°C | ||||
| Min. temperature | ||||||
| +15°C | +14°C | +5°C | ||||
| Max. temperature | ||||||
| +38°C | +38°C | +33°C | ||||
| Rainfall | ||||||
| 261 mm | 223 mm | 117 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 78% | 77% | 72% | ||||
| Air pressure | ||||||
| 1005 HPa | 1007 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 3 | 4 | 10 | ||||
| Cloudy days | ||||||
| 10 | 8 | 9 | ||||
| Rainy days | ||||||
| 14 | 14 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +29°C to +30°C during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 261 mm to 223 mm. It feels drier, as humidity decreases from 78% to 77%. The average wind speed doesn’t change much during August, staying around 2 m/s. The good news is there are likely to be more sunny days in August, from 3 to 4.
But maybe it is worth considering traveling in September 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 Seoul is gradually increasing during August, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Seoul?
Climate Change over Years
The climate in Seoul in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+15°C) and the highest in 2021 (+18°C). The driest year was 2001 with only 618 mm of rainfall, and the wettest year was 2020 with 1720 mm.
FAQ
Is August a good time to visit Seoul?
Can you sunbathe in Seoul in August?
Is Seoul rainy in August?
Is it sunny in Seoul in August?
Other cities in South Korea
Monthly weather in Seoul
Source of the data
For this page, we’ve looked at the typical weather in Seoul, 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.