Annual mean 13°C · wettest around November · prevailing wind SW
Warmest
30.0 °C
Coldest
-0.4 °C
Wettest
92%
Windiest
2.6 m/s
Prevailing
SW
1.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Seoul over the whole year is 13°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -4°C. The rainy (wet) season in Seoul runs from November, peaking in November with a 69% chance of rain on a given day. The dry season is December to February; December is the driest month, at 30%. Winds in Seoul are highest in April, averaging 1.4 m/s (5 km/h), and lightest in October, at 1.0 m/s (4 km/h). The prevailing wind is from the SW. The clearest skies in Seoul come in November, when the sky is typically 40% covered; August is the cloudiest month, at 70%.
Month by month Seoul climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
2°C
-4°C
-2°C
39%
44%
1.1 m/s
0
0
9
February
4°C
-2°C
0°C
41%
42%
1.3 m/s
0
0
16
March
12°C
4°C
8°C
51%
42%
1.3 m/s
8
0
57
April
16°C
9°C
13°C
49%
41%
1.4 m/s
39
1
77
May
22°C
15°C
21°C
56%
51%
1.2 m/s
75
21
56
June
26°C
20°C
27°C
41%
56%
1.2 m/s
55
62
15
July
27°C
23°C
30°C
44%
67%
1.2 m/s
19
51
4
August
30°C
25°C
34°C
56%
70%
1.1 m/s
6
29
1
September
25°C
18°C
25°C
44%
55%
1.2 m/s
71
46
27
October
19°C
11°C
17°C
40%
43%
1.0 m/s
68
3
79
November
11°C
5°C
8°C
69%
40%
1.0 m/s
17
0
52
December
3°C
-2°C
-1°C
30%
40%
1.1 m/s
0
0
11
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Seoul weather by season
Year round, Seoul has days of about 2°C at their warmest in January, its coolest month, and 30°C in August, its warmest; the coolest hours of the day run from -4°C to 25°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around November and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Seoul weather in winterDecember to February
High 3°CLow -3°CRain 36%
Winter in Seoul has typical daily highs of about 3°C and lows of about -3°C, with a 36% chance of rain on a given day.
Seoul weather in springMarch to May
High 17°CLow 9°CRain 52%
Spring in Seoul has typical daily highs of about 17°C and lows of about 9°C, with a 52% chance of rain on a given day.
Seoul weather in summerJune to August
High 27°CLow 23°CRain 47%
Summer in Seoul has typical daily highs of about 27°C and lows of about 23°C, with a 47% chance of rain on a given day.
Seoul weather in autumnSeptember to November
High 18°CLow 11°CRain 51%
Autumn in Seoul has typical daily highs of about 18°C and lows of about 11°C, with a 51% chance of rain on a given day.
When is the rainy season in Seoul?
The rainy (wet) season in Seoul runs from November, peaking in November with a 69% chance of rain on a given day. The dry season is December to February; December is the driest month, at 30%.
What time of year is Seoul windiest?
Winds in Seoul are highest in April, averaging 1.4 m/s (5 km/h), and lightest in October, at 1.0 m/s (4 km/h). The prevailing wind is from the SW.
What is the average temperature in Seoul year round?
The average temperature in Seoul over the whole year is 13°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -4°C.