The East Asian Monsoon creates hot and humid Summers and short but very cold Winters.
Seoul is a short distance from the coast of the Yellow Sea The climate is continental, with cold, sunny winters and hot, sultry and rainy summers. The city is affected by the monsoon circulation: in winter, the northwest cold currents prevail, while in summer, they are replaced by hot and humid currents of tropical origin. Spring and autumn which are mild and pleasant is the transitional periods.
| Month | Min (°C) | Max (°C) | Mean (°C) | Min (°F) | Max (°F) | Mean (°F) |
|---|---|---|---|---|---|---|
| January | -6 | 2 | -2 | 21 | 36 | 28,4 |
| February | -4 | 4 | 0 | 25 | 39 | 32 |
| March | 1 | 10 | 5,5 | 34 | 50 | 41,9 |
| April | 7 | 18 | 12,5 | 45 | 64 | 54,5 |
| May | 13 | 23 | 18 | 55 | 73 | 64,4 |
| June | 18 | 27 | 22,5 | 64 | 81 | 72,5 |
| July | 22 | 29 | 25,5 | 72 | 84 | 77,9 |
| August | 22 | 30 | 26 | 72 | 86 | 78,8 |
| September | 17 | 26 | 21,5 | 63 | 79 | 70,7 |
| October | 10 | 20 | 15 | 50 | 68 | 59 |
| November | 3 | 12 | 7,5 | 37 | 54 | 45,5 |
| December | -3 | 4 | 0,5 | 27 | 39 | 32,9 |
| Year | 8,4 | 17,2 | 12,75 | 47,1 | 62,9 | 55 |
The average temperature In winter is a few degrees below freezing (0 °C or 32 °F); but sunshine is quite common. A cold wind blows from the Asian continent. Temperatures at night, it can drop to -20 °C (-4 °F).
Although the winter is a dry season, sometimes it can snow.
Spring is mild, but the rains increase gradually. However, the rainiest season is summer from June to August. In summer, there can also be periods of good weather, which can be very hot, with highs about 35 °C (95 °F) and more.
In autumn, rainfall decreases, and by October, the rains are quite rare. Here is the average precipitation.
From July to early October (and occasionally also in the second half of June), Seoul can be affected by typhoons, the tropical cyclones of South-East Asia, although this area of Korea is less exposed than the southern coast.