Best Time to Visit Seoul

South Korea · weather by month, temperature and rainfall

Best monthsMay and October
HottestAugust · 29°C
ColdestJanuary · -7°C
WettestJuly · 360 mm

If you want the most pleasant weather in Seoul, plan your trip for May and October. August is the hottest month, with average highs of 29°C (83°F), while January is the coldest, with lows around -7°C (20°F). Rain is heaviest in July, at about 360 mm (14.2 in), and lightest in January, at 18 mm (0.7 in). January is the least comfortable month, mainly because of the cold.

When to go to Seoul: a seasonal guide

Spring: April and May are the sweet spot

Spring is when Seoul feels easiest. April days are mild and bright, and the cherry blossoms usually peak in early April. Yeouido, along the Han River, and the lanes around Seoul National University are popular spots. Expect crowds under the trees, especially at weekends.

May is warmer and a bit wetter, but the afternoons are still comfortable for walking. It's a good month for Bukhansan trails and for the palaces: Gyeongbokgung and Changdeokgung are both easy on foot. Buddha's Birthday brings lantern displays to Jogyesa temple, and the Lotus Lantern Festival lights up the streets around Jongno. Travelling with kids? Early May has several public holidays, so family spots fill up fast.

Autumn: October is just as good

October matches spring for comfort. Skies are clear, the air is dry-ish and the nights turn cool. The leaves peak in late October and into early November, and Namsan, Bukhansan and the palace grounds look their best. Changdeokgung's Secret Garden is lovely then.

September is a different story. It's still warm and sticky, and rain lingers. Fair, but not great. November is cooler and quieter, with bare branches and good light. Pick it if you hate crowds and don't mind a jacket. It's also kimchi-making season, when Seoul Kimjang Festival events are held.

Summer: hot, then very wet

June is warm and fairly manageable, though rain picks up. Then July arrives with the heavy rains, known locally as jangma, the monsoon season. It's the wettest month by far, and rain falls on most days. August is nearly as wet and slightly hotter, and it's the hottest month.

Nights stay muggy. Sightseeing turns into a game of ducking between museums, cafés and underground shopping malls. If you must come now, base yourself near a subway line and plan indoor stops like the National Museum of Korea.

Winter: cold, dry and clear

December to February is properly cold, with lows well below freezing in January. But it's dry, and the days are often crisp and bright. Palaces under snow are a real treat. You can warm up with hot tteokbokki (spicy rice cakes) at a market stall, or a long soak in a jjimjilbang, a Korean bathhouse. Ski resorts in Gangwon province are a short trip away. Winter is the quietest time for crowds, except around the Lunar New Year holiday, when many shops close for a few days.

Seoul weather by month

-15°-10°-5°0°5°10°15°20°25°30°0200400January: 18 mm rainFebruary: 28 mm rainMarch: 44 mm rainApril: 66 mm rainMay: 90 mm rainJune: 131 mm rainJuly: 360 mm rainAugust: 251 mm rainSeptember: 146 mm rainOctober: 61 mm rainNovember: 54 mm rainDecember: 25 mm rainJanuary: 1°CFebruary: 4°CMarch: 9°CApril: 16°CMay: 21°CJune: 26°CJuly: 28°CAugust: 29°CSeptember: 25°COctober: 19°CNovember: 11°CDecember: 3°CJanuary: -7°CFebruary: -5°CMarch: 0°CApril: 5°CMay: 11°CJune: 17°CJuly: 21°CAugust: 22°CSeptember: 17°COctober: 10°CNovember: 3°CDecember: -4°CJanFebMarAprMayJunJulAugSepOctNovDec mm°C
Avg high Avg low Rainfall (mm)
Jan1°C / -7°C18 mmPoorFeb4°C / -5°C28 mmPoorMar9°C / 0°C44 mmFairApr16°C / 5°C66 mmExcellentMay21°C / 11°C90 mmExcellentJun26°C / 17°C131 mmGoodJul28°C / 21°C360 mmPoorAug29°C / 22°C251 mmPoorSep25°C / 17°C146 mmFairOct19°C / 10°C61 mmExcellentNov11°C / 3°C54 mmGoodDec3°C / -4°C25 mmPoor

Monthly climate table

MonthHighLowRainRainy daysHumiditySun hrs/dayRating
January1°C 33°F-7°C 20°F18 mm376%4.9Poor 3.3
February4°C 38°F-5°C 24°F28 mm474%5.6Poor 4.2
March9°C 49°F0°C 31°F44 mm775%6.4Fair 6.3
April16°C 60°F5°C 41°F66 mm774%6.6Excellent 8.3
May21°C 70°F11°C 51°F90 mm875%6.9Excellent 9.3
June26°C 78°F17°C 62°F131 mm1077%5.8Good 7
July28°C 82°F21°C 70°F360 mm1984%4Poor 3.8
August29°C 83°F22°C 72°F251 mm1883%5.3Poor 4
September25°C 77°F17°C 63°F146 mm1179%5.8Fair 6.1
October19°C 66°F10°C 50°F61 mm775%6.7Excellent 9.6
November11°C 52°F3°C 37°F54 mm876%5.2Good 6.9
December3°C 37°F-4°C 24°F25 mm577%4.7Poor 3.9

Frequently asked questions

When is the best time to visit Seoul?

The best time to visit Seoul is May and October, based on comfortable temperatures, low rainfall and plenty of sunshine.

What is the hottest month in Seoul?

August is the hottest month in Seoul, with an average high of 29°C (83°F).

What is the coldest month in Seoul?

January is the coldest month in Seoul, with an average low of -7°C (20°F).

What is the rainiest month in Seoul?

July is the wettest month, with about 360 mm (14.2 in) of rain. January is the driest, with 18 mm (0.7 in).

Does it snow in Seoul?

Snow is possible in December, when daytime highs stay close to or below freezing.

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