5-day weather forecast Seoul 21-05-2026

Weather forecast Seoul Thursday, May 21 21.05.2026: sunny, temperature from 17 °C to 26 °C.

Precipitation probability 66%. Wind up to 5.31 m/s (gusts 6.11 m/s). Air humidity 35–82%, atmospheric pressure 758–760 mm Hg, UV index up to 7.7.

Sunrise 05:19
Sunset 19:39

Waxing Crescent24% illuminated
Moonrise 09:26 · Moonset below the horizon

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← Wed, May 20

Thu, May 21, 2026

Fri, May 22 →

Forecast from 17 °C to 26 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	19	19	18	18	18	18	17	17	17	19	20	20	21	21	23	25	26	25	24	23	22	21	20	19
Precipitation (mm/hr)	0	0.04	0.01	0.21	0	0.44	1.4	0.81	0.12	0.02	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	69	89	100	100	92	100	91	65	56	73	62	48	51	80	47	21	10	10	10	7	3	2	0	0
Rain chance (%)	0	66	61	100	0	100	100	100	100	73	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	2.69	2.69	2.5	2.69	3.19	2.81	2.5	3.19	3.31	4.31	4.81	4.19	4.11	4.39	4.39	5.31	5.11	5.31	4.39	3.81	3.61	3.11	2.61	2.61
Wind gust (m/s)	3.86	3.81	3.5	3.78	4.44	3.86	3.47	4.47	4.53	5.39	5.53	4.92	4.72	5.14	5.08	6.11	5.86	6.11	5.33	5.06	5.36	4.72	4.06	4.08
Wind direction (°)	ENE 77°	ENE 70°	ENE 61°	ENE 65°	NE 55°	NE 53°	ENE 67°	ENE 77°	ENE 77°	ENE 67°	ENE 67°	E 81°	E 87°	ENE 73°	ENE 72°	E 83°	E 90°	E 92°	E 92°	E 88°	E 81°	E 81°	E 82°	ENE 77°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	59	61	61	64	67	68	78	82	79	72	61	59	56	54	47	36	35	35	38	40	43	44	45	47

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	759	759	759	758	758	758	758	759	759	759	759	760	759	759	758	758	758	758	758	759	759	760	760	760

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0.4	1.1	2.5	4.9	6.7	7.7	5.1	3.7	3.9	0.9	1.3	0.4	0.1	0	0	0	0

← Wed, May 20

Thu, May 21, 2026

Fri, May 22 →

Seoul on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →