Avg High
Seoul in August
Avg Low
Rain
Daylight
14h
What to expect
Seoul is in late summer during August, with the season well established by this point. Afternoons often feel hot in direct sun, and a gentle drop-off once the sun goes down. Conditions tend to feel steady, which makes planning simple. Daylight stays generous for longer outdoor plans.
August in context
How it compares to the rest of the year in Seoul.
Hottest (avg)
#1 / 12
Wettest (avg)
#2 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#9 / 12
Highest UV
#4 / 12
Most Humid
#2 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 13.6 h
- UV index (max)
- 8
- Typical sun hours
- 05:48 - 19:23
Rain & Snow
- Total rain
-
- Rainy days
- 19 days
- Cloud cover (avg)
- 67%
Humidity & Wind
- Humidity (avg)
- 83%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for August. Typical high 29.7°C and low 23.0°C.
Typical disruptions in August
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in August.
Humidity High impact
Muggy days Measures: Muggy days (dew point >=20C). Observed about 80% of days (24.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
24.8 days / month
~80% of days
Why this matters
- Expected days 24.8 days / month
- Probability ~80% of days
- Intensity Up to ~25°C (P95)
Muggy conditions are possible on ~25 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat High impact
Hot feels-like days Measures: Hot feels-like days (>=32C). Observed about 61% of days (18.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
18.9 days / month
~61% of days
Why this matters
- Expected days 18.9 days / month
- Probability ~61% of days
- Intensity Up to ~40°C (P95)
Feels-like heat >=32C is possible on ~19 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Hot days Measures: Hot days (>=30C). Observed about 35% of days (10.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
10.8 days / month
~35% of days
Why this matters
- Expected days 10.8 days / month
- Probability ~35% of days
- Intensity Up to ~34°C (P95)
Hot days are possible on ~11 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Very hot feels-like Measures: Very hot feels-like days (>=35C). Observed about 33% of days (10.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
10.1 days / month
~33% of days
Why this matters
- Expected days 10.1 days / month
- Probability ~33% of days
- Intensity Up to ~40°C (P95)
Very hot feels-like conditions are possible on ~10 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Heat stress risk Measures: High heat stress days. Observed about 33% of days (10.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
10.1 days / month
~33% of days
Why this matters
- Expected days 10.1 days / month
- Probability ~33% of days
- Intensity Up to ~40°C (P95)
Heat stress is possible on ~10 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 32% of days (9.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
9.9 days / month
~32% of days
Why this matters
- Expected days 9.9 days / month
- Probability ~32% of days
- Intensity Up to ~73mm (P95)
Rain disruption risk appears on ~10 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Show all disruptions (26 more)
Rain High impact
Washout risk Measures: Washout day risk. Observed about 30% of days (9.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
9.5 days / month
~30% of days
Why this matters
- Expected days 9.5 days / month
- Probability ~30% of days
- Intensity Up to ~74mm (P95)
Washout conditions are possible on ~9 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 23% of days (7.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
7.2 days / month
~23% of days
Why this matters
- Expected days 7.2 days / month
- Probability ~23% of days
- Intensity Up to ~79mm (P95)
Heavy rain is possible on ~7 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Humidity High impact
Oppressive humidity Measures: Oppressive humidity days (dew point >=24C). Observed about 22% of days (6.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
6.9 days / month
~22% of days
Why this matters
- Expected days 6.9 days / month
- Probability ~22% of days
- Intensity Up to ~25°C (P95)
Oppressive humidity is possible on ~7 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 12% of days (3.6 days/month) in August. Historical risk signal only, not a day-by-day forecast.
3.6 days / month
~12% of days
Why this matters
- Expected days 3.6 days / month
- Probability ~12% of days
- Intensity Up to ~93mm (P95)
Very heavy rain is possible on ~4 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 2.3 days/month in August. Historical risk signal only, not a day-by-day forecast.
2.3 days / month
Probability unavailable
Why this matters
- Expected days 2.3 days / month
- Probability —
- Intensity Up to ~69mm (P95)
Multi-day washout runs are possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Stormy conditions Measures: Storm-impact proxy days. Observed about 5% of days (1.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.5 days / month
~5% of days
Why this matters
- Expected days 1.5 days / month
- Probability ~5% of days
- Intensity Up to ~98km/h (P95)
Stormy conditions are possible on ~2 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain High impact
Extreme rain Measures: Extreme rain days (>=50mm). Observed about 4% of days (1.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
~4% of days
Why this matters
- Expected days 1.4 days / month
- Probability ~4% of days
- Intensity Up to ~121mm (P95)
Extreme rain is possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 3% of days (1.0 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.0 days / month
~3% of days
Why this matters
- Expected days 1.0 days / month
- Probability ~3% of days
- Intensity Up to ~103km/h (P95)
Strong gusts are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Wind High impact
Severe gusts Measures: Severe gust days (>=80 km/h). Observed about 1% of days (0.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~113km/h (P95)
Severe gusts are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Visibility Moderate
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 12% of days (3.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
3.7 days / month
~12% of days
Why this matters
- Expected days 3.7 days / month
- Probability ~12% of days
- Intensity Up to ~98% (P95)
Fog-likely conditions are possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Moderate
Feels-like heatwave Measures: Feels-like heatwave runs (>=3 days). Observed about 1.8 days/month in August. Historical risk signal only, not a day-by-day forecast.
1.8 days / month
Probability unavailable
Why this matters
- Expected days 1.8 days / month
- Probability —
- Intensity Up to ~39°C (P95)
Feels-like heatwave runs are possible on ~2 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat Moderate
Heatwave run Measures: Heatwave runs (>=3 hot days). Observed about 1.4 days/month in August. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
Probability unavailable
Why this matters
- Expected days 1.4 days / month
- Probability —
- Intensity Up to ~33°C (P95)
Heatwave runs are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity Minor
Humid days Measures: Humid days (dew point >=18C). Observed about 93% of days (28.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
28.7 days / month
~93% of days
Why this matters
- Expected days 28.7 days / month
- Probability ~93% of days
- Intensity Up to ~25°C (P95)
Humid conditions are possible on ~29 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 74% of days (23.0 days/month) in August. Historical risk signal only, not a day-by-day forecast.
23.0 days / month
~74% of days
Why this matters
- Expected days 23.0 days / month
- Probability ~74% of days
- Intensity Up to ~95% (P95)
High humidity is possible on ~23 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 71% of days (22.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
22.1 days / month
~71% of days
Why this matters
- Expected days 22.1 days / month
- Probability ~71% of days
- Intensity Up to ~54mm (P95)
Measurable rain is possible on ~22 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 63% of days (19.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
19.4 days / month
~63% of days
Why this matters
- Expected days 19.4 days / month
- Probability ~63% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~19 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Warm nights Measures: Warm nights (min >=22C). Observed about 59% of days (18.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
18.3 days / month
~59% of days
Why this matters
- Expected days 18.3 days / month
- Probability ~59% of days
- Intensity Up to ~26°C (P95)
Warm nights are possible on ~18 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 58% of days (18.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
18.1 days / month
~58% of days
Why this matters
- Expected days 18.1 days / month
- Probability ~58% of days
- Intensity Up to ~24h (P95)
Several rainy hours are possible on ~18 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 44% of days (13.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
13.5 days / month
~44% of days
Why this matters
- Expected days 13.5 days / month
- Probability ~44% of days
- Intensity Up to ~24h (P95)
Wet-most-of-day conditions are possible on ~14 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 41% of days (12.6 days/month) in August. Historical risk signal only, not a day-by-day forecast.
12.6 days / month
~41% of days
Why this matters
- Expected days 12.6 days / month
- Probability ~41% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~13 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Convective risk Measures: Convective storm risk proxy. Observed about 31% of days (9.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
9.5 days / month
~31% of days
Why this matters
- Expected days 9.5 days / month
- Probability ~31% of days
- Intensity Up to ~25°C (P95)
Convective risk signal appears on ~10 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 20% of days (6.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
6.4 days / month
~20% of days
Why this matters
- Expected days 6.4 days / month
- Probability ~20% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~6 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 19% of days (5.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
5.7 days / month
~19% of days
Why this matters
- Expected days 5.7 days / month
- Probability ~19% of days
- Intensity Up to ~86km/h (P95)
Gusty conditions are possible on ~6 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Other Minor
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data Measures: Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data. Observed about 12% of days (3.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
3.7 days / month
~12% of days
Why this matters
- Expected days 3.7 days / month
- Probability ~12% of days
- Intensity Up to ~98 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Hot nights Measures: Hot nights (min >=25C). Observed about 8% of days (2.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
2.5 days / month
~8% of days
Why this matters
- Expected days 2.5 days / month
- Probability ~8% of days
- Intensity Up to ~27°C (P95)
Hot nights are possible on ~3 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Wind Minor
Breezy days Measures: Breezy days (mean wind >=25 km/h). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~35km/h (P95)
Breezy conditions are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Frequently asked questions
Is August a good time to visit Seoul?
Typical August days in Seoul reach highs of 29°C (84°F) with nights around 22°C (72°F). It usually feels hot by day and warm after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in August?
In August, you can usually expect highs of 29°C (84°F) and lows near 22°C (72°F). That means hot days and warm nights, so pack layers you can add or remove.
How much does it rain in August?
Rainfall in August averages 276 mm (10.9 in) across roughly 19 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in August?
You can expect about 14 hours of daylight in August. Sunrise is typically around 05:48 and sunset near 19:23. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels are often high (around 8). Regular sunscreen and a hat are recommended.
Is it windy in August?
In August, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 46 km/h (29 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.