Avg High
Seoul in January
Avg Low
Rain
Daylight
10h
What to expect
In Seoul, January sits in mid-winter, with a clear seasonal rhythm running through the month. Most days feel cold but manageable, with evenings that ease back comfortably. With less daylight, it helps to start earlier and pace your day. Comfort is usually predictable, so a standard day plan works well.
January in context
How it compares to the rest of the year in Seoul.
Hottest (avg)
#12 / 12
Wettest (avg)
#12 / 12
Daylight Hours
#11 / 12
Windiest (avg)
#4 / 12
Highest UV
#11 / 12
Most Humid
#12 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 9.9 h
- UV index (max)
- 4
- Typical sun hours
- 07:43 - 17:37
Rain & Snow
- Total rain
-
- Rainy days
- 5 days
- Cloud cover (avg)
- 44%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 60%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for January. Typical high 1.7°C and low -7.5°C.
Typical disruptions in January
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in January.
Cold High impact
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 100% of days (31.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
31.0 days / month
~100% of days
Why this matters
- Expected days 31.0 days / month
- Probability ~100% of days
- Intensity Up to ~-5°C (P95)
Cold feels-like nights are possible on ~31 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Cold High impact
Freezing nights Measures: Freezing nights (min <=0C). Observed about 97% of days (30.1 days/month) in January. Historical risk signal only, not a day-by-day forecast.
30.1 days / month
~97% of days
Why this matters
- Expected days 30.1 days / month
- Probability ~97% of days
- Intensity Up to ~-2°C (P95)
Freezing nights are possible on ~30 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold High impact
Hard freeze nights Measures: Hard freeze nights (min <=-2C). Observed about 92% of days (28.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
28.4 days / month
~92% of days
Why this matters
- Expected days 28.4 days / month
- Probability ~92% of days
- Intensity Up to ~-3°C (P95)
Hard freeze conditions are possible on ~28 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Snow High impact
Snow days Measures: Snow days (>=0.1mm snowfall). Observed about 16% of days (5.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
5.0 days / month
~16% of days
Why this matters
- Expected days 5.0 days / month
- Probability ~16% of days
- Intensity Up to ~3.2mm (P95)
Snowfall is possible on ~5 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 3% of days (0.9 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.9 days / month
~3% of days
Why this matters
- Expected days 0.9 days / month
- Probability ~3% of days
- Intensity Up to ~25mm (P95)
Washout conditions are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cold Moderate
Cold snap run Measures: Cold snap runs (>=3 cold days). Observed about 1.2 days/month in January. Historical risk signal only, not a day-by-day forecast.
1.2 days / month
Probability unavailable
Why this matters
- Expected days 1.2 days / month
- Probability —
- Intensity Up to ~8°C (P95)
Cold snap runs are possible on ~1 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Show all disruptions (16 more)
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 1% of days (0.5 days/month) in January. 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 ~71km/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
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 1% of days (0.4 days/month) in January. 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 ~33mm (P95)
Heavy rain is possible on ~0 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 0.1 days/month in January. Historical risk signal only, not a day-by-day forecast.
0.1 days / month
Probability unavailable
Why this matters
- Expected days 0.1 days / month
- Probability —
- Intensity Up to ~21mm (P95)
Multi-day washout runs are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 3% of days (0.9 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.9 days / month
~3% of days
Why this matters
- Expected days 0.9 days / month
- Probability ~3% of days
- Intensity Up to ~25mm (P95)
Rain disruption risk appears on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 100% of days (31.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
31.0 days / month
~100% of days
Why this matters
- Expected days 31.0 days / month
- Probability ~100% of days
- Intensity Up to ~-1°C (P95)
Cold nights are possible on ~31 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Cold Minor
Cold days Measures: Cold days (max <=10C). Observed about 99% of days (30.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
30.6 days / month
~99% of days
Why this matters
- Expected days 30.6 days / month
- Probability ~99% of days
- Intensity Up to ~8°C (P95)
Cold daytime conditions are possible on ~31 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 34% of days (10.5 days/month) in January. Historical risk signal only, not a day-by-day forecast.
10.5 days / month
~34% of days
Why this matters
- Expected days 10.5 days / month
- Probability ~34% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~10 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 27% of days (8.3 days/month) in January. Historical risk signal only, not a day-by-day forecast.
8.3 days / month
~27% of days
Why this matters
- Expected days 8.3 days / month
- Probability ~27% of days
- Intensity Up to ~60km/h (P95)
Gusty conditions are possible on ~8 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 24% of days (7.3 days/month) in January. Historical risk signal only, not a day-by-day forecast.
7.3 days / month
~24% of days
Why this matters
- Expected days 7.3 days / month
- Probability ~24% of days
- Intensity Up to ~10mm (P95)
Measurable rain is possible on ~7 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 19% of days (5.7 days/month) in January. 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 ~100% (P95)
Mostly cloudy skies are possible on ~6 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 15% of days (4.7 days/month) in January. Historical risk signal only, not a day-by-day forecast.
4.7 days / month
~15% of days
Why this matters
- Expected days 4.7 days / month
- Probability ~15% of days
- Intensity Up to ~17h (P95)
Several rainy hours are possible on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 13% of days (3.9 days/month) in January. Historical risk signal only, not a day-by-day forecast.
3.9 days / month
~13% of days
Why this matters
- Expected days 3.9 days / month
- Probability ~13% of days
- Intensity Up to ~93% (P95)
High humidity is possible on ~4 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 9% of days (2.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
2.6 days / month
~9% of days
Why this matters
- Expected days 2.6 days / month
- Probability ~9% of days
- Intensity Up to ~18h (P95)
Wet-most-of-day conditions are possible on ~3 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 8% of days (2.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
2.4 days / month
~8% of days
Why this matters
- Expected days 2.4 days / month
- Probability ~8% 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.
Visibility Minor
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 1% of days (0.4 days/month) in January. 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 ~98% (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 (0.4 days/month) in January. 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 ~98 (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.
Frequently asked questions
Is January a good time to visit Seoul?
Typical January days in Seoul reach highs of 2°C (36°F) with nights around -7°C (19°F). It usually feels cold by day and very cold after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in January?
Daytime temperatures in January typically peak near 2°C (36°F), while nights drop to around -7°C (19°F). Expect cold afternoons and very cold evenings.
How much does it rain in January?
Rainfall in January averages 19 mm (0.75 in) across roughly 5 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 January?
You can expect about 10 hours of daylight in January. Sunrise is typically around 07:43 and sunset near 17:37. Days are on the shorter side, so plan activities around limited daylight.
How strong is the sun in January?
UV levels are moderate (around 4); sunscreen and sunglasses are still a good idea.
Is it windy in January?
In January, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 49 km/h (30 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.