Avg High
Seoul in October
Avg Low
Rain
Daylight
11h
What to expect
Seoul is in mid-autumn during October, a shoulder-season stretch where conditions can nudge warmer or cooler week to week. It generally feels mild and comfortable, and a gentle drop-off once the sun goes down. You get a comfortable daylight window for day trips and sightseeing. Conditions tend to feel steady, which makes planning simple.
October in context
How it compares to the rest of the year in Seoul.
Hottest (avg)
#6 / 12
Wettest (avg)
#7 / 12
Daylight Hours
#8 / 12
Windiest (avg)
#10 / 12
Highest UV
#8 / 12
Most Humid
#5 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 11.2 h
- UV index (max)
- 6
- Typical sun hours
- 06:40 - 17:54
Rain & Snow
- Total rain
-
- Rainy days
- 7 days
- Cloud cover (avg)
- 46%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 73%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for October. Typical high 18.7°C and low 8.8°C.
Typical disruptions in October
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in October.
Cold High impact
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 30% of days (9.3 days/month) in October. Historical risk signal only, not a day-by-day forecast.
9.3 days / month
~30% of days
Why this matters
- Expected days 9.3 days / month
- Probability ~30% of days
- Intensity Up to ~5°C (P95)
Cold feels-like nights are possible on ~9 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 10% of days (3.1 days/month) in October. Historical risk signal only, not a day-by-day forecast.
3.1 days / month
~10% of days
Why this matters
- Expected days 3.1 days / month
- Probability ~10% of days
- Intensity Up to ~46mm (P95)
Rain disruption risk appears on ~3 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 9% of days (2.9 days/month) in October. Historical risk signal only, not a day-by-day forecast.
2.9 days / month
~9% of days
Why this matters
- Expected days 2.9 days / month
- Probability ~9% of days
- Intensity Up to ~48mm (P95)
Washout conditions are possible on ~3 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 2% of days (0.5 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~68km/h (P95)
Stormy conditions are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Show all disruptions (20 more)
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 6% of days (1.7 days/month) in October. Historical risk signal only, not a day-by-day forecast.
1.7 days / month
~6% of days
Why this matters
- Expected days 1.7 days / month
- Probability ~6% of days
- Intensity Up to ~57mm (P95)
Heavy rain is possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 2% of days (0.6 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
~2% of days
Why this matters
- Expected days 0.6 days / month
- Probability ~2% of days
- Intensity Up to ~95mm (P95)
Very heavy rain is possible on ~1 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 0.6 days/month in October. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
Probability unavailable
Why this matters
- Expected days 0.6 days / month
- Probability —
- Intensity Up to ~96mm (P95)
Multi-day washout runs are 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 1% of days (0.4 days/month) in October. 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 ~72km/h (P95)
Strong gusts are possible on ~0 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 1% of days (0.2 days/month) in October. 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 ~100mm (P95)
Extreme rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 34% of days (10.6 days/month) in October. Historical risk signal only, not a day-by-day forecast.
10.6 days / month
~34% of days
Why this matters
- Expected days 10.6 days / month
- Probability ~34% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~11 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 29% of days (8.9 days/month) in October. Historical risk signal only, not a day-by-day forecast.
8.9 days / month
~29% of days
Why this matters
- Expected days 8.9 days / month
- Probability ~29% of days
- Intensity Up to ~29mm (P95)
Measurable rain is possible on ~9 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 27% of days (8.5 days/month) in October. Historical risk signal only, not a day-by-day forecast.
8.5 days / month
~27% of days
Why this matters
- Expected days 8.5 days / month
- Probability ~27% of days
- Intensity Up to ~91% (P95)
High humidity is possible on ~9 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 20% of days (6.1 days/month) in October. Historical risk signal only, not a day-by-day forecast.
6.1 days / month
~20% of days
Why this matters
- Expected days 6.1 days / month
- Probability ~20% of days
- Intensity Up to ~16h (P95)
Several rainy hours are possible on ~6 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 18% of days (5.7 days/month) in October. Historical risk signal only, not a day-by-day forecast.
5.7 days / month
~18% of days
Why this matters
- Expected days 5.7 days / month
- Probability ~18% of days
- Intensity Up to ~61km/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.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 18% of days (5.6 days/month) in October. Historical risk signal only, not a day-by-day forecast.
5.6 days / month
~18% of days
Why this matters
- Expected days 5.6 days / month
- Probability ~18% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~6 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 14% of days (4.3 days/month) in October. Historical risk signal only, not a day-by-day forecast.
4.3 days / month
~14% of days
Why this matters
- Expected days 4.3 days / month
- Probability ~14% of days
- Intensity Up to ~5°C (P95)
Cold nights are possible on ~4 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 12% of days (3.7 days/month) in October. 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 ~17h (P95)
Wet-most-of-day conditions are possible on ~4 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 7% of days (2.2 days/month) in October. Historical risk signal only, not a day-by-day forecast.
2.2 days / month
~7% of days
Why this matters
- Expected days 2.2 days / month
- Probability ~7% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~2 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold days Measures: Cold days (max <=10C). Observed about 2% of days (0.6 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
~2% of days
Why this matters
- Expected days 0.6 days / month
- Probability ~2% of days
- Intensity Up to ~10°C (P95)
Cold daytime conditions are possible on ~1 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Visibility Minor
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 1% of days (0.5 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~1% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~1% of days
- Intensity Up to ~94% (P95)
Fog-likely conditions are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
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 1% of days (0.5 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~1% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~1% of days
- Intensity Up to ~94 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Freezing nights Measures: Freezing nights (min <=0C). Observed about 1% of days (0.3 days/month) in October. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~-0°C (P95)
Freezing nights are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Humid days Measures: Humid days (dew point >=18C). Observed about 1% of days (0.2 days/month) in October. 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 ~21°C (P95)
Humid conditions are possible on ~0 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Humidity Minor
Convective risk Measures: Convective storm risk proxy. Observed about 1% of days (0.2 days/month) in October. 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 ~20°C (P95)
Convective risk signal appears on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Frequently asked questions
Is October a good time to visit Seoul?
Typical October days in Seoul reach highs of 19°C (66°F) with nights around 9°C (48°F). It usually feels mild by day and cool after dark. Overall, October sits in the middle of the Seoul climate range.
What are temperatures like in October?
Daytime temperatures in October typically peak near 19°C (66°F), while nights drop to around 9°C (48°F). Expect mild afternoons and cool evenings.
How much does it rain in October?
Rainfall in October averages 62 mm (2.4 in) across roughly 7 days. Overall it is a moderately wet time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in October?
You can expect about 11 hours of daylight in October. Sunrise is typically around 06:40 and sunset near 17:54. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in October?
UV levels are moderate (around 6); sunscreen and sunglasses are still a good idea.
Is it windy in October?
In October, 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.