Sunny Skies Forecast on Sunday for Seoul Area, East Coast

A surge of dry, stable air is set to deliver bright, brisk weather to the Seoul metropolitan region and much of the East Coast on Sunday, while cloudier spots inland should see skies open up later in the day. Expect a feel of winter’s edge despite the sunshine, with cooler air settling in behind a recent front.

Sunday at a glance

Sunshine will dominate over the capital area and along the East Coast, including coastal Gangwon. Elsewhere, a gray start is likely to give way to breaks of sun by late afternoon. Temperatures will run 5–10 degrees Celsius lower than on Saturday, and a light northwesterly breeze will make it feel crisper than the thermometer suggests.

Early-week temperature swings

Short-lived but noticeable swings are expected as new systems move through:

• Monday: morning lows between -9°C and +1°C, with daytime highs reaching 4–13°C.
• Tuesday: morning lows from -3°C to +8°C, climbing to 5–15°C during the day.

This seesaw pattern reflects quick-moving winter disturbances—cold air draining in behind one system, then a brief warm-up ahead of the next.

Rain returns midweek

Showers are expected to develop Tuesday afternoon across the capital area and portions of Gangwon, Chungcheong, and Jeolla, spreading to most regions by Wednesday. Precipitation should fall mainly as rain; higher elevations could see a brief mix if colder air lingers locally. Commuters should watch for slick roads Tuesday evening and early Wednesday.

Environmental and daily-life impacts

• Air quality: Clear, dry conditions favor improved visibility and dispersion of pollutants Sunday. The midweek rain will help wash out fine particles, offering a temporary air-quality boost.
• Energy use: The sharper chill Sunday morning may lift heating demand. Small efficiency steps—reducing thermostat settings slightly, closing drafts—can lower bills and cut emissions.
• Urban microclimate: Sunshine will warm sheltered city spots, but wind-exposed areas will feel noticeably colder. Dress in layers and carry wind protection.
• Outdoor plans: Sunday is the best window for hiking and coastal walks; sun protection is still relevant despite the season. Recheck the forecast before travel on Tuesday afternoon and Wednesday.

Regional snapshot

• Seoul/Incheon/Gyeonggi: Bright, colder Sunday; rain developing Tuesday afternoon and expanding overnight.
• East Coast including Gangwon: Plenty of sun Sunday; clouds increase Tuesday with rain spreading by late day into Wednesday.
• Chungcheong/Jeolla: Slow clearing Sunday; rain arrives Tuesday and becomes more widespread by Wednesday.

Bottom line: Look for a crisp, sunny Sunday across the Seoul area and along the East Coast, followed by a brief warm-up and then a broad sweep of rain by midweek. With fast-moving winter systems, timing can shift—stay tuned to updates if you have travel or outdoor plans.