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South Korea’s Feb 18 Weather Forecast Shows Sunny Skies Across Twelve Major Cities

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Nationwide Sunny Outlook With No Rain Expected The Yonhap forecast released at 9:01 a.m. on Feb 18 lists sunny or partly cloudy conditions for all twelve major cities, with a uniform 0 % chance of precipitation [1]. Temperatures range from a daytime high of 5 °C in Incheon to 13 °C in Busan, while nighttime lows vary between –5 °C in Chuncheon and 4 °C on Jeju Island [1]. Chuncheon is the only location forecast as cloudy, though still without rain [1].

Seoul’s Daytime High Reaches Six Degrees Celsius Seoul is expected to reach a high of 6 °C during the day and drop to a low of 1 °C at night, under clear skies and zero rain probability [1]. The capital’s conditions mirror the broader national pattern of sunshine and dry weather [1].

Busan Warmest While Incheon Coolest Among Daytime Highs Busan records the highest daytime temperature at 13 °C, contrasting with Incheon’s low of 5 °C [1]. Nighttime lows remain above freezing in most coastal cities, with Jeju Island enjoying the warmest low at 4 °C [1]. Inland locations such as Chuncheon experience sub‑zero night temperatures, reaching –5 °C [1].

Earlier Forecast Noted Limited Rain Chance in Gwangju and Busan The Feb 17 Yonhap report indicated a 10 % chance of rain for Gwangju and Busan, while all other cities showed 0 % [2]. The updated Feb 18 forecast removes any rain probability for those two cities, presenting a completely dry outlook [1]. This shift highlights a rapid adjustment in short‑term precipitation expectations between the two consecutive forecasts [1][2].

Sources

Timeline

Nov 30, 2025 – Temperatures reach 13‑21 °C across the 12 major cities, with Busan at 20 °C and Jeju at 21 °C, while cloud cover dominates eight cities and rain chances stay low, topping at 30 % in Seoul and others[30].

Dec 1, 2025 – Seoul records a high of 8 °C and low of 3 °C under cloudy skies with a 20 % rain chance; Jeju stays warm at 15 °C/12 °C, also cloudy with 10 % rain[29].

Dec 2, 2025 – Forecast shows Seoul at 3 °C/–1 °C, cloudy with 10 % rain; Busan warmest at 13 °C/5 °C, sunny with 10 % rain; Jeju cloudy 12 °C/7 °C, 30 % rain[28].

Dec 3, 2025 – Jeju experiences rain with a high of 9 °C/5 °C and 70 % rain probability, while Busan remains sunny at 7 °C/–1 °C, 0 % rain[27].

Dec 4, 2025 – Seoul sunny at 2 °C/–9 °C with 60 % rain chance; Jeju 11 °C/5 °C, rain 60 %; Chuncheon sunny 2 °C/–14 °C, rain 60 %[26].

Dec 18, 2025 – Seoul cloudy 11 °C/0 °C, rain 30 %; Busan sunny 15 °C/6 °C, rain 60 %; Chuncheon cloudy 5 °C/–4 °C, rain 30 %[25].

Dec 19, 2025 – Saturday outlook predicts Seoul 11 °C/9 °C with 60 % rain, Busan 19 °C/12 °C sunny with 60 % rain, indicating a unusually warm and wet weekend[24].

Dec 20, 2025 – Chuncheon faces a 70 % rain risk with a high of 2 °C and low of –5 °C, while other cities stay mostly sunny with modest rain chances[23].

Dec 24, 2025 – Forecast shows Seoul, Incheon, Suwon, Cheongju sunny with 0 % rain, but Daejeon cloudy (20 % rain) and Gangneung cloudy (40 % rain)[22].

Dec 26, 2025 – Seoul sunny at –4 °C/–12 °C, 0 % rain; Gwangju sees snow with a high of 1 °C/–5 °C and 20 % precipitation, highlighting regional wintry variation[21].

Dec 28, 2025 – Seoul and central cities sunny with highs 6‑8 °C, lows near –2 °C, yet Chuncheon records a 70 % rain risk, underscoring localized precipitation spikes[20].

Dec 31, 2025 – Jeju cloudy with a 30 % rain chance (high 6 °C/low 4 °C), while Seoul and Incheon stay sunny with 0 % rain, illustrating a dry capital contrast[19].

Jan 1, 2026 – Eight cities forecast sunny, but Jeju and Gwangju carry a 60 % rain probability, and temperatures hover around freezing nationwide[18].

Jan 2, 2026 – Sub‑freezing temperatures persist nationwide (Seoul –11.2 °C), heavy‑snow alerts target southern regions, and Ulleung Island records 30.1 cm of snow; a photo shows Seoul pedestrians braving the deep freeze[17].

Jan 5, 2026 – Forecast lists Jeju with a 20 % rain chance (9 °C/7 °C) and Busan 10 % rain (9 °C/3 °C), while Seoul and Incheon remain sunny with 0 % rain[16].

Jan 8, 2026 – A sharp cold snap drops Seoul to –8.2 °C, with mountain lows near –30 °C; the KMA warns of heavy snow beginning Friday night in the central region and spreading to Jeju by Saturday, with accumulations up to 10 cm inland[15].

Jan 11, 2026 – Sunday outlook shows Seoul sunny at –4 °C/–8 °C (0 % rain) and Jeju sleet at 5 °C/3 °C with a 60 % precipitation chance, highlighting mixed wintry conditions[14].

Jan 14, 2026 – All 12 cities face cloudy skies, Chuncheon hits a low of –15 °C and a 40 % rain chance, while Jeju records a milder high of 15 °C/3 °C, underscoring regional temperature contrasts[13].

Jan 21, 2026 – Mostly sunny across the nation, but Gwangju and Jeju expect snow with 60 % and 70 % precipitation probabilities respectively, and Cheongju and Daejeon each carry a 60 % rain risk[12].

Jan 24, 2026 – Saturday update notes snow in Jeonju and Gwangju (30 % and 30 % chances), while Seoul stays sunny at –2 °C/–11 °C with 0 % rain, illustrating localized snowfall[11].

Jan 28, 2026 – Wednesday forecast predicts sunny skies for most cities with 0 % rain, Seoul high 6 °C, low –14 °C, and Jeju the warmest at 6 °C/2 °C with a 20 % rain chance[10].

Jan 31, 2026 – Saturday outlook shows Seoul cloudy with a high of 1 °C/low –10 °C and 20 % rain, while Busan sunny at 8 °C/–2 °C with 20 % rain, and Chuncheon the coldest low at –14 °C[9].

Feb 1, 2026 – KMA warns heavy snow will begin Sunday night, potentially exceeding 5 cm/h, with up to 10 cm expected in Seoul; it advises commuters to exercise caution on slippery roads and the state rail operator adds trains on five Seoul lines, while the municipal government extends bus and train services until 9:30 a.m.[7].

Feb 1, 2026 – Overnight snowfall blankets the nation, prompting Seoul to lift its heavy‑snow advisory at 4 a.m., deploy snow‑removal trucks, and issue a 6 a.m. mobile alert urging public‑transport use; traffic jams occur near Gwanghwamun Square[6].

Feb 1, 2026 – Sunday forecast for 12 cities shows Seoul, Incheon, Suwon sunny with 60 % rain risk, while Cheongju and Gwangju anticipate snow (20 % and 10 % chances) and Chuncheon remains sunny despite a –12 °C low[8].

Feb 5, 2026 – Thursday outlook gives Seoul an 8 °C high, 0 °C low and a 60 % rain chance, while Chuncheon expects sleet with a 60 % precipitation probability, and Jeju records the warmest high of 15 °C under cloudy skies[5].

Feb 6, 2026 – Friday outlook predicts mostly sunny conditions with a 20 % rain chance, temperatures ranging from –9 °C in Seoul to 8 °C in Busan, and cloudier skies on the east coast[4].

Feb 6, 2026 – The Korea Meteorological Administration warns the cold wave will deepen over the weekend, with morning temps falling to –15 °C – –5 °C, wind speeds of 55‑70 kph, and a wind chill of –14 °C in Seoul; the warning area will expand beyond the capital, Gangwon, and South Chungcheong[3].

Feb 17, 2026 – Tuesday forecast shows sunny skies across major cities, highs from 6 °C (Seoul) to 13 °C (Busan), with only Gwangju and Busan retaining a 10 % rain chance[2].

Feb 18, 2026 – Wednesday forecast lists Seoul high 6 °C/low 1 °C, sunny, and all 12 cities at 0 % rain probability, with Busan warmest at 13 °C and Chuncheon the only cloudy city (high 8 °C/low –5 °C)[1].

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