This information may change. Always check the official source.Last verified: August 2026 by Ondřej Kadlec
Best time to visit South Korea
In Seoul: May to June and September to October — the months averaging 18–27 °C by day. No other month of the twelve falls inside that band in Seoul.
South Korea is not one climate. Each reference city below is answered on its own numbers.
Seoul
Jan2°January: 2 °C by day, -7 °C at night, 19 mm of rain
Feb5°February: 5 °C by day, -5 °C at night, 24 mm of rain
Mar10°March: 10 °C by day, 0 °C at night, 42 mm of rain
Apr17°April: 17 °C by day, 6 °C at night, 71 mm of rain
May22°May: 22 °C by day, 12 °C at night, 97 mm of rain, recommended
Jun26°June: 26 °C by day, 17 °C at night, 133 mm of rain, recommended
Jul28°July: 28 °C by day, 22 °C at night, 325 mm of rain
Aug29°August: 29 °C by day, 22 °C at night, 279 mm of rain
Sep25°September: 25 °C by day, 17 °C at night, 131 mm of rain, recommended
Oct19°October: 19 °C by day, 9 °C at night, 57 mm of rain, recommended
Nov11°November: 11 °C by day, 2 °C at night, 49 mm of rain
Dec3°December: 3 °C by day, -5 °C at night, 21 mm of rain
Warmest
August, 29 °C
Coolest
January, 2 °C
Driest
January, 19 mm
Wettest
July, 325 mm
Busan
May to July and September to October — 18–27 °C by day. No other month of the twelve falls inside that band in Busan.
Jan6°January: 6 °C by day, -1 °C at night, 32 mm of rain
Feb9°February: 9 °C by day, 1 °C at night, 43 mm of rain
Mar12°March: 12 °C by day, 5 °C at night, 83 mm of rain
Apr17°April: 17 °C by day, 9 °C at night, 114 mm of rain
May21°May: 21 °C by day, 14 °C at night, 122 mm of rain, recommended
Jun24°June: 24 °C by day, 18 °C at night, 177 mm of rain, recommended
Jul27°July: 27 °C by day, 22 °C at night, 264 mm of rain, recommended
Aug28°August: 28 °C by day, 24 °C at night, 206 mm of rain
Sep25°September: 25 °C by day, 20 °C at night, 178 mm of rain, recommended
Oct21°October: 21 °C by day, 14 °C at night, 73 mm of rain, recommended
Nov15°November: 15 °C by day, 7 °C at night, 50 mm of rain
Dec8°December: 8 °C by day, 1 °C at night, 28 mm of rain
Warmest
August, 28 °C
Coolest
January, 6 °C
Driest
December, 28 mm
Wettest
July, 264 mm
How this is worked out: a month qualifies when its mean daytime high falls between 18 °C and 27 °C. Where more than five qualify, the answer is the driest run of consecutive qualifying months; where none do, it is the driest three months in a row if the year is hot throughout, or the warmest three if it never gets there. The figures are the thirty-year monthly averages charted below, and they are averages, not a forecast — any single year can miss them by a wide margin.
Seoul
Long-term averages for Seoul: the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).
DayNight
Show the monthly table
Seoul
Month
Day (°C)
Night (°C)
Rain (mm)
January
2
-7
19
February
5
-5
24
March
10
0
42
April
17
6
71
May
22
12
97
June
26
17
133
July
28
22
325
August
29
22
279
September
25
17
131
October
19
9
57
November
11
2
49
December
3
-5
21
Busan
Long-term averages for Busan: the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).
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