15-Day Weather Forecast - Phnom Penh

15-day weather forecast for Phnom Penh: temperatures from 24°C (75°F) to 31°C (88°F). Average daily high 30°C (86°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +30°C

15-Day Temperature Trend

30°25°TodaySep29°24°Tmrw31°25°Sun30°25°Mon30°25°Tue31°25°Wed30°25°Thu26°25°Fri27°24°Sat29°24°Sun31°25°Mon30°25°Tue31°25°Wed31°25°Thu29°25°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +30°/+25°
    feels +36°10.1 mm · 100%8 km/hUV 4 · Mod
    05:4918:03
  • Sat, Sep 12Tomorrow
    +29°/+24°
    feels +36°26.5 mm · 98%7 km/hUV 8 · Hi
    05:4918:03
  • Sun, Sep 13Sun
    +31°/+25°
    feels +39°14.3 mm · 100%14 km/hUV 3 · Low
    05:4918:02
  • Mon, Sep 14Mon
    +30°/+25°
    feels +36°13.2 mm · 91%16 km/hUV 8 · Hi
    05:4918:01
  • Tue, Sep 15Tue
    +30°/+25°
    feels +35°8.7 mm · 86%17 km/hUV 8 · Hi
    05:4918:01
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  • Wed, Sep 16Wed
    +31°/+25°
    feels +37°5.7 mm · 92%17 km/hUV 7 · Hi
    05:4918:00
  • Thu, Sep 17Thu
    +30°/+25°
    feels +35°10.3 mm · 97%15 km/hUV 6 · Mod
    05:4917:59
  • Fri, Sep 18Fri
    +26°/+25°
    feels +31°20.8 mm · 100%13 km/hUV 5 · Mod
    05:4917:59
  • Sat, Sep 19Sat
    +27°/+24°
    feels +32°14.6 mm · 100%14 km/hUV 8 · V.Hi
    05:4917:58
  • Sun, Sep 20Sun
    +29°/+24°
    feels +34°11.6 mm · 90%11 km/hUV 4 · Mod
    05:4917:57
  • Mon, Sep 21Mon
    +31°/+25°
    feels +36°16.8 mm · 96%7 km/hUV 4 · Mod
    05:4917:57
  • Tue, Sep 22Tue
    +30°/+25°
    feels +35°2.2 mm · 94%11 km/hUV 2 · Low
    05:4917:56
  • Wed, Sep 23Wed
    +31°/+25°
    feels +37°6.4 mm · 92%6 km/hUV 3 · Low
    05:4917:55
  • Thu, Sep 24Thu
    +31°/+25°
    feels +37°13.2 mm · 92%6 km/hUV 5 · Mod
    05:4917:55
  • Fri, Sep 25Fri
    +29°/+25°
    feels +36°5.8 mm · 86%8 km/hUV 4 · Mod
    05:4917:54

Weather Insight

Phnom Penh's 15-day outlook ranges from a low of 24°C to a high of 31°C, with an average daytime high near 30°C. Air quality is currently Moderate (AQI 94), driven mainly by PM2.5 at 39 μg/m³.

Today vs Normal

30°C0° below normal

The long-term average high for today is 30°C.

24 of the last 28 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.

2026-08-28: 30°C30°2026-08-29: 31°C31°2026-08-30: 32°C32°2026-08-31: 33°C33°2026-09-01: 32°C32°2026-09-02: 33°C33°2026-09-03: 34°C34°2026-09-04: 34°C34°2026-09-05: 34°C34°2026-09-06: 34°C34°2026-09-07: 33°C33°2026-09-08: 33°C33°

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 Phnom Penh

Over the next 15 days, Phnom Penh is forecast to see temperatures ranging from 24°C to 32°C, averaging a daily high of 30°C. The extended outlook indicates significant rainfall totalling 180.2 mm spread across 15 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.