15-Day Weather Forecast - Daejeon

15-day weather forecast for Daejeon: temperatures from 14°C (57°F) to 30°C (86°F). Average daily high 26°C (79°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +25°C

15-Day Temperature Trend

25°14°TodaySep25°17°Tmrw26°17°Sun26°18°Mon28°16°Tue29°18°Wed29°18°Thu20°18°Fri27°17°Sat28°19°Sun30°19°Mon24°19°Tue23°16°Wed23°16°Thu25°15°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +25°/+14°
    feels +25°0 mm · 14%12 km/hUV 6 · Hi
    06:0918:44
  • Sat, Sep 12Tomorrow
    +25°/+17°
    feels +26°0 mm · 2%8 km/hUV 6 · Mod
    06:1018:42
  • Sun, Sep 13Sun
    +26°/+17°
    feels +27°10 km/hUV 6 · Hi
    06:1018:41
  • Mon, Sep 14Mon
    +26°/+18°
    feels +29°0 mm · 2%10 km/hUV 6 · Mod
    06:1118:39
  • Tue, Sep 15Tue
    +28°/+16°
    feels +30°0 mm · 10%11 km/hUV 6 · Hi
    06:1218:38
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  • Wed, Sep 16Wed
    +29°/+18°
    feels +30°17 km/hUV 6 · Hi
    06:1318:37
  • Thu, Sep 17Thu
    +29°/+18°
    feels +28°1.0 mm · 8%20 km/hUV 6 · Hi
    06:1418:35
  • Fri, Sep 18Fri
    +20°/+18°
    feels +22°14.6 mm · 34%17 km/hUV 4 · Mod
    06:1418:34
  • Sat, Sep 19Sat
    +27°/+17°
    feels +30°0 mm · 15%6 km/hUV 3 · Low
    06:1518:32
  • Sun, Sep 20Sun
    +28°/+19°
    feels +29°0 mm · 12%15 km/hUV 6 · Hi
    06:1618:31
  • Mon, Sep 21Mon
    +30°/+19°
    feels +32°0 mm · 17%14 km/hUV 5 · Mod
    06:1718:29
  • Tue, Sep 22Tue
    +24°/+19°
    feels +29°35.4 mm · 25%8 km/hUV 1 · Low
    06:1818:28
  • Wed, Sep 23Wed
    +23°/+16°
    feels +23°0 mm · 20%9 km/hUV 6 · Hi
    06:1818:26
  • Thu, Sep 24Thu
    +23°/+16°
    feels +22°0 mm · 13%17 km/hUV 6 · Hi
    06:1918:25
  • Fri, Sep 25Fri
    +25°/+15°
    feels +26°0 mm · 18%15 km/hUV 6 · Hi
    06:2018:23

Weather Insight

Daejeon's 15-day outlook ranges from a low of 14°C to a high of 30°C, with an average daytime high near 26°C. That's 1° above the long-term average high of 25°C for this time of year. It continues a recent pattern — 11 of the last 19 days with published data have run warmer than normal. Air quality is currently Moderate (AQI 75), driven mainly by PM2.5 at 25 μg/m³.

Today vs Normal

25°C0° below normal

The long-term average high for today is 25°C.

11 of the last 19 days with published data ran above normal.

That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.

2026-08-19: 31°C31°2026-08-20: 28°C28°2026-08-21: 27°C27°2026-08-22: 31°C31°2026-08-23: 32°C32°2026-08-24: 33°C33°2026-08-25: 31°C31°2026-08-26: 33°C33°2026-08-27: 32°C32°2026-08-28: 27°C27°2026-08-29: 29°C29°2026-08-30: 26°C26°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.

Extended Outlook for Daejeon

Over the next 15 days, Daejeon is forecast to see temperatures ranging from 14°C to 30°C, averaging a daily high of 26°C. The extended outlook indicates significant rainfall totalling 51 mm spread across 3 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.