Sejong, South Korea Weather

  1. Sejong, South Korea Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Sejong over the next 12 hours
  7. Temperature and possibility of rain in Sejong in the coming days
  8. Rainfall in Sejong in the coming days
  9. Sejong Weather Summary
  10. Weather averages by month
  11. Sejong's weather
  12. Frequently asked questions
  13. Comments
Sejong, Weather
(Photo by rawkkim on Unsplash)

Current conditions

Updated:
26°C
78.8°F
°C °F

Condition: Clear Sky

Pressure: 1,018 hPa

Feel like: 28 °C

Temperature: 26°C

Cloud: 10%

Humidity: 56%

Wind: NE - 8 km/h

Visibility: 26.06 km

Weather forecast

Sun
20 Sep
16°C / 29°C
Mainly Clear
Mon
21 Sep
17°C / 29°C
Overcast
Tue
22 Sep
18°C / 27°C
Drizzle
Wed
23 Sep
19°C / 27°C
Drizzle
Thu
24 Sep
18°C / 27°C
Drizzle
Hourly forecast today:
04:00 AM
16° / 26°
16° / 26°
Clear Sky
56% 28 km/h
05:00 AM
16° / 27°
16° / 27°
Clear Sky
54% 28 km/h
06:00 AM
17° / 27°
17° / 27°
Clear Sky
54% 29 km/h
07:00 AM
16° / 27°
16° / 27°
Clear Sky
53% 29 km/h
08:00 AM
16° / 26°
16° / 26°
Clear Sky
55% 29 km/h
09:00 AM
16° / 25°
16° / 25°
Clear Sky
59% 32 km/h
10:00 AM
16° / 23°
16° / 23°
Clear Sky
64% 32 km/h
11:00 AM
16° / 22°
16° / 22°
Clear Sky
68% 28 km/h
12:00 PM
16° / 21°
16° / 21°
Clear Sky
71% 27 km/h
13:00 PM
16° / 20°
16° / 20°
Clear Sky
74% 21 km/h
14:00 PM
15° / 20°
15° / 20°
Clear Sky
76% 19 km/h

30 Day Averages and Extremes

  • Average high 25.17°C
  • Average low 16.13°C
  • Hottest day 29°C (07 September 2026)
  • Coldest day 10°C (30 September 2026)
  • Average humidity 65.73%
  • Days with precipitation 13 days
  • Highest precipitation 14 mm (25 September 2026)

Yesterday's Data

  • Max: 27°C
  • Min: 18°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Sejong over the next 12 hours

Temperature and possibility of rain in Sejong in the coming days

Rainfall in Sejong in the coming days

Sejong Climate Summary

Sejong features a Humid continental, severe dry winter, hot summer (Köppen classification: Dwa), with an average annual temperature of 13.55ºC (56.39ºF), which is about -0.05% lower than the national average for South Korea. Annually, the city experiences approximately 50.06 millimeters (1.97 inches) of rainfall, spread across 84.07 rainy days, accounting for 23.03% of the year.

Longitude 37.5518018
Latitude 127.0736345
Yearly high temperature 16.82ºC (62.28ºF)
Yearly low temperature 8.49ºC (47.28ºF)
Hottest month August 30.38ºC (86.68ºF)
Coldest month January -6.13ºC (20.97ºF)
Yearly precip 50.06mm (1.97in)
Days with rainfall 84.07 days (23.03%)
Driest month January (61.68%)
Wettest month July (80.05%)

Weather averages by month

Month High / Low (°C) Rain
January 0.36° / -6.13° 2.36 days
February 3.9° / -3.06° 2.82 days
March 10.56° / 1.97° 4.36 days
April 16.7° / 6.92° 6.18 days
May 23.24° / 12.28° 6.36 days
June 27.75° / 17.31° 9.27 days
July 29.23° / 21.58° 16.27 days
August 30.38° / 22.05° 16.36 days
September 26.02° / 16.89° 7.0 days
October 19.82° / 10.83° 4.09 days
November 11.49° / 4.64° 5.73 days
December 2.33° / -3.44° 3.27 days

Sejong's weather

Frequently asked questions

1. What is the hottest month in Sejong?

August has the highest average monthly temperature (daily mean of 30.38ºC) and January are the coolest (daily mean of -6.13ºC).

2. What should I wear in Sejong today?

For today's very hot weather in Sejong, with the high temperatures above 27ºC (80.6ºF), consider wearing:
- Breathable shorts or skirts
- Lightweight t-shirt or tank top
- Loose and airy fabrics like linen or cotton
- Open-toed sandals or light sneakers

Temperature

Early
16°C / 25°C
Morning
16°C / 25°C
Afternoon
15°C / 19°C
Evening
14°C / 16°C

Air quality

Moderate

Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals

  • CO2 432
  • CO 131
  • NH3 0
  • NO2 5
  • O3 110
  • PM10 17
  • PM25 12
  • SO2 4
  • CH4 1,401

Sunrise / Sunset

21:17
09:32