Today, Monday, September 28, will see partly cloudy skies across the country, with afternoon high temperatures ranging between 24°C and 29°C. The lingering late-summer heat is subsiding, giving way to distinctly autumnal weather. During the morning commute, dense fog centered on inland areas reduced visibility significantly, but conditions are gradually improving as the morning progresses. In Jeju Island, light rain of less than 0.1 mm fell in some areas until early morning, but it has mostly stopped by now. During this seasonal transition, cool morning and evening air coexists with warm daytime sunshine, making it essential to pay special attention to health management. It is wise to wear a light jacket in the morning and choose clothing that is easy to remove as temperatures rise during the day. In this article, we will look in detail at specific temperature distributions in major regions across the country, precautions regarding morning fog, and useful tips for outdoor activities.
=
Today’s Weather, September 28: Late Summer Heat Retreats, Large Daily Temperature Range Brings Clear Autumn Weather

1. Morning Fog and Safe Driving Tips for the Commute

Until this morning, dense fog with visibility under 200 meters persisted in the inland and mountainous areas of Gangwon, northern Chungcheongnam-do, the southern coast of Jeollanam-do, and inland areas of Gyeongsangbuk-do, making visibility very poor. Drivers on their morning commute had to slow down and use their headlights, navigating carefully. On foggy days, roads can be slippery due to dew, so it is safer to maintain a following distance at least twice as wide as usual. Pedestrians should also be cautious when crossing streets, as oncoming vehicles may be hard to see from a distance; always look around carefully before crossing. The Korea Meteorological Administration forecast that the fog would gradually clear as the morning progressed, with the country returning to partly cloudy skies. Office workers dealing with morning traffic congestion and citizens starting their early morning workouts began their day with a focus on safety. On days with dense fog, visibility drops rapidly, so drivers must significantly reduce speed not only on regular roads but also on highways. Turning on fog lights or hazard lights to clearly signal your presence to vehicles behind you is a simple practice that can prevent major accidents.
Dense fog persisted in inland areas until this morning, so both drivers and pedestrians needed to be cautious, maintaining safe distances and driving slowly.
2. Afternoon Temperatures and Daily Temperature Ranges in Major Regions

Today’s afternoon high temperatures across the country range from 24°C to 29°C, offering a cool yet somewhat warm autumn sunshine. In the Chungcheong region, Daejeon, Sejong, and Gongju are expected to reach 26°C, providing comfortable weather for outdoor activities. Cheonan, Asan, and Hongseong will show 25°C, while coastal areas like Boryeong at 25°C and Seosan at 24°C will feel relatively cool. Since mornings are chilly but temperatures rise to around 25°C by midday, many areas experience a daily temperature difference of over 10°C. During this seasonal transition, when immunity tends to drop, this large temperature swing often leads to an increase in colds and respiratory illnesses. To avoid suffering from the cold evening breeze after going out in thin clothing, it is advisable to carry a light windbreaker or cardigan. When the daily temperature range is large in autumn, regulating body temperature is paramount, so it is a good habit to keep a scarf or light jacket in your bag. Knowing how to maintain body temperature when there is a significant difference between indoor and outdoor temperatures is key to staying healthy during the seasonal change.
Afternoon temperatures across the country range from 24°C to 29°C, indicating clear autumn weather, but due to the large daily temperature range, preparing outerwear for temperature regulation is essential.
3. Autumn Outdoor Activity Trends as Late Summer Heat Fades

Starting this week, the persistent late-summer heat is subsiding, and full-fledged autumn weather is settling in. As the breeze becomes cooler, there is a surge in citizens joining after-work running crews or preparing for weekend marathons. Indeed, the flow of people running in parks or along the Han River is unceasing, reflecting a growing trend of prioritizing health. Thanks to the perfect weather, tourists heading to Jeju Island or the southern regions for autumn trips are also feeling lighter on their feet. Travel reviews featuring the beautiful skies and open landscapes of Seogwipo, where one can enjoy the fresh air, are gaining popularity on online communities. The apparel industry is also holding large-scale sales for new autumn collections to match the cool weather, encouraging consumer spending. While autumn is the best season for exercise, sudden intense outdoor activities can strain muscles, so it is important to start with light stretching. After sweating outdoors, body temperature can drop quickly in the cool wind, so carrying a towel or spare clothes is recommended.
As the late-summer heat recedes and cool autumn weather arrives, the number of people enjoying outdoor activities such as running, marathons, and travel is increasing rapidly.
4. Guide to Seasonal Fashion and Outfit Selection
With cool mornings and evenings contrasting with warm afternoons, more people are finding themselves deep in thought every morning when opening their closets. Wearing clothes that are too thick leads to sweating during the day, while wearing too little results in feeling chilly in the evening. Recently, boat-neck color-block raglan t-shirts and lightweight long-sleeved tops have become popular items for coping with the cool morning and evening weather. Using hair scrunchies or headbands, which are loved as daily accessories in all four seasons, to tie hair up coolly during the warm daytime and add a point to one’s coordination is also a useful strategy. Choosing fabrics like linen or thin cotton blends for clothing, in addition to fashion accessories like shoes and bags, is wise as it balances breathability and warmth. Checking the daily weather forecast every morning and anticipating the difference between the day’s high and low temperatures is the secret to a successful outfit. More consumers are utilizing online shopping mall sales to purchase trendy autumn clothing at reasonable prices. An outfit strategy that balances colors that suit you with comfortable wearability protects both health and style during the seasonal transition.
For the seasonal weather with cool mornings/evenings and warm afternoons, choosing layered outfits and clothing that allows for easy temperature regulation is important.
5. Weather in Jeju and Other Regions, and Weekly Outlook
In Jeju Island today, very light rain of less than 0.1 mm fell until the morning, but currently, only occasional clouds are passing, revealing a clear sky. Both the central regions, including the Chungcheong area, and the southern regions are mostly cloudy, providing a comfortable environment for outings. The Korea Meteorological Administration forecasts that typical autumn weather with mostly clouds and no significant rain will continue until mid-week. However, since morning low temperatures are expected to drop to around 15°C in many places, inland areas may feel chilly, so attention to warmth is necessary. Given the frequent weather changes during this period, it is necessary to diligently check the latest weather information before going out. If you are planning outdoor events for the weekend, it is wise to prepare backup locations or umbrellas in case of sudden weather changes. Since many regions experience a daily temperature range of over 10°C, special attention should be paid to crop management and health. Clear autumn skies are expected throughout the coming week, so taking a walk in a nearby park would be a good idea.
Rain in Jeju and inland areas has mostly stopped, and typical autumn weather with clouds and a large daily temperature range is expected to continue until mid-week.
6. Preparing for a Healthy and Energetic Autumn
In seasons with large daily temperature ranges and cool weather like today, our body’s biological rhythms can easily be disrupted, making regular lifestyle habits essential. Taking a moment in a busy daily routine to enjoy a warm cup of tea or a light walk can effectively relieve stress. To maintain immunity during the seasonal transition, it is important to follow basic health rules such as consuming plenty of seasonal fruits and vegetables and getting sufficient sleep. Planning weekend outings in advance to fully enjoy the approaching autumn atmosphere is also a good way to add vitality to daily life. We recommend strolling through parks or doing light exercise with those around you, feeling the cool breeze and finding small happiness. By exercising the wisdom to flexibly adapt to weather changes, we hope you will spend a healthy and abundant autumn for both body and mind. It is important to continue checking weather information and try small changes in daily life to match the ever-changing autumn weather. We sincerely hope you will prioritize health and fill this week with energetic and pleasant daily moments.
To prepare for the large daily temperature range and seasonal weather, one should practice regular routines and health management to welcome an energetic autumn.
Frequently Asked Questions
=