South Korea will experience clear skies and a cool breeze with significant day-night temperature differences today and tomorrow [1, 2].
These conditions are driven by a spring high-pressure system. The resulting strong sunshine increases the risk of UV exposure and causes temperatures to drop rapidly after sunset, requiring residents to adjust their clothing to avoid illness.
In Seoul, the current temperature is 19.1 °C [1]. For tomorrow, morning lows in Seoul and Daejeon are expected to reach eight °C [2], while Busan will see a low of 10 °C [2]. Midday highs are forecast to reach 22 °C in Seoul and Gwangju [2], with Daegu reaching 23 °C [2].
The UV index is expected to be high to very high [1]. This intensity is a result of the clear skies and high-pressure system currently dominating the region.
While the weather remains mostly clear, the forecast indicates a change for some areas later in the week. Isolated rain is expected on Thursday in central northern regions [1].
Residents in major cities including Seoul, Daejeon, Busan, Gwangju, and Daegu should prepare for the sharp contrast between the cool mornings and warmer afternoons, a hallmark of the current spring transition [1, 2].
“Morning lows around 8–10 °C and midday highs around 22–23 °C in major cities.”
The combination of a strong spring high-pressure system and high UV levels indicates a volatile transitional weather period. The significant temperature gap between morning and midday increases the risk of seasonal colds, while the high UV index necessitates increased sun protection for the public.
