01Weather
Seoul weather in August
Afternoons in August average 31.0 °C (88 °F) and nights cool to 24.6 °C (76 °F). The month brings about 450 mm (17.7 in) of rain spread over roughly 19 days. Compared with July it is 0.4 °C warmer; September is 3.9 °C cooler again.
What the averages hide
| In a typical August | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 35 °C / 95 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 26 °C / 79 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 21 °C / 71 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 20.3 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 63 % | at least 1 mm |
| Hottest / coldest August day 2016–2025 | 39.2 °C / 16.1 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 August | 05:36 | 19:40 | 14.1 h |
| 15 August | 05:48 | 19:25 | 13.6 h |
| 31 August | 06:01 | 19:03 | 13.0 h |
Daylight shrinks by about 66 minutes over the month. Times are local (Asia/Seoul).
03Crowds
How busy Seoul is in August
moderate The main sights are moderate in August. What drives it:
- Liberation Day on 15 August
- peak heat
- domestic holiday season
04Public holidays
Public holidays in August 2027
| Date | Holiday |
|---|---|
| 16 Aug 2027 | Liberation Day |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Seoul in August
Every year in August
| Event | When | Type |
|---|---|---|
| Liberation Day | 15 August | national |
07Packing
What to pack for Seoul in August
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- a compact umbrella or hooded rain jacket, rain falls on roughly one day in three
- something for heat: 20 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
August is hot and humid, with afternoons around 31 °C and tropical nights above 25 °C, Liberation Day on 15 August as a public holiday and many Koreans on holiday at the coast in the first two weeks. Afternoon storms are common, on about twelve days. The Han River pools and the night markets are the local response. Rates stay low until September.
The Seoul Ulchi civil-defence drills in August briefly stop traffic for twenty minutes one afternoon. The palaces are quiet in the heat; the museums and the Starfield library at COEX are the circuit. Typhoons can reach Korea in late August and September. For the relief of early autumn and Chuseok, see September.
09Compare
Seoul month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 3 °C | -5 °C | – | – | quiet | Good |
| February | 6 °C | -3 °C | – | – | quiet | Good |
| March | 13 °C | 3 °C | – | – | moderate | Good |
| April | 20 °C | 9 °C | – | – | very busy | Good |
| May | 24 °C | 14 °C | – | – | busy | Excellent |
| June | 28 °C | 20 °C | 17 | – | moderate | Good |
| July | 31 °C | 24 °C | 20 | – | quiet | Mixed |
| August | 31 °C | 25 °C | 19 | – | moderate | Mixed |
| September | 27 °C | 19 °C | – | – | busy | Excellent |
| October | 20 °C | 11 °C | – | – | very busy | Good |
| November | 13 °C | 4 °C | – | – | moderate | Good |
| December | 4 °C | -4 °C | 11 | – | moderate | Mixed |
Not sure about August? See the best time to visit Seoul.
10Elsewhere
August in nearby cities
| City | High | Rain days |
|---|---|---|
| Kyoto in August | 34 °C | 8 |
| Shanghai in August | 34 °C | 14 |
| Beijing in August | 32 °C | 10 |
| Tokyo in August | 32 °C | 8 |
| Bangkok in August | 34 °C | 23 |
| Singapore in August | 32 °C | 12 |
11FAQ
Seoul in August: your questions
Is August a good time to visit Seoul?
August is a reasonable month with trade-offs to visit Seoul. Daytime highs average 31 °C (88 °F), rain falls on about 19 days, and hotel arrivals run above the yearly average, so the main sights are moderate.
What is the weather like in Seoul in August?
Expect hot days around 31 °C (88 °F) and nights near 25 °C (76 °F). One August in ten brings afternoons above 35 °C, and one in ten stays below 26 °C.
Does it rain a lot in Seoul in August?
August brings about 450 mm (17.7 in) of rain over roughly 19 days, which is wet by Seoul standards. On any given day the chance of at least 1 mm of rain is 63 percent.
What should I wear in Seoul in August?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Seoul crowded in August?
The main sights are moderate in August. Main drivers: Liberation Day on 15 August; peak heat; domestic holiday season.
What time does it get dark in Seoul in August?
Around the middle of August the sun sets at about 19:25 and rises at 05:48, giving 13.6 hours of daylight.