15-Day Weather Forecast - Vientiane

15-day weather forecast for Vientiane: temperatures from 23°C (73°F) to 32°C (90°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 +32°C

15-Day Temperature Trend

32°26°TodaySep31°23°Tmrw32°25°Sun32°25°Mon28°25°Tue29°24°Wed29°24°Thu30°24°Fri29°24°Sat31°24°Sun30°23°Mon30°23°Tue30°23°Wed30°23°Thu30°23°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +32°/+26°
    feels +36°1.1 mm · 76%18 km/hUV 8 · V.Hi
    05:5618:15
  • Sat, Sep 12Tomorrow
    +31°/+23°
    feels +38°2.0 mm · 73%14 km/hUV 8 · V.Hi
    05:5718:14
  • Sun, Sep 13Sun
    +32°/+25°
    feels +39°1.5 mm · 43%12 km/hUV 7 · Hi
    05:5718:13
  • Mon, Sep 14Mon
    +32°/+25°
    feels +38°1.2 mm · 78%13 km/hUV 2 · Low
    05:5718:12
  • Tue, Sep 15Tue
    +28°/+25°
    feels +33°18.2 mm · 90%12 km/hUV 2 · Low
    05:5718:12
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  • Wed, Sep 16Wed
    +29°/+24°
    feels +35°21.7 mm · 84%9 km/hUV 6 · Hi
    05:5718:11
  • Thu, Sep 17Thu
    +29°/+24°
    feels +34°24.8 mm · 85%16 km/hUV 7 · Hi
    05:5718:10
  • Fri, Sep 18Fri
    +30°/+24°
    feels +35°10.6 mm · 89%18 km/hUV 7 · Hi
    05:5718:09
  • Sat, Sep 19Sat
    +29°/+24°
    feels +35°16.4 mm · 80%9 km/hUV 8 · V.Hi
    05:5818:08
  • Sun, Sep 20Sun
    +31°/+24°
    feels +37°19.8 mm · 84%12 km/hUV 8 · V.Hi
    05:5818:07
  • Mon, Sep 21Mon
    +30°/+23°
    feels +35°12.4 mm · 61%17 km/hUV 8 · V.Hi
    05:5818:07
  • Tue, Sep 22Tue
    +30°/+23°
    feels +35°9.0 mm · 53%14 km/hUV 8 · V.Hi
    05:5818:06
  • Wed, Sep 23Wed
    +30°/+23°
    feels +35°7.8 mm · 67%10 km/hUV 8 · Hi
    05:5818:05
  • Thu, Sep 24Thu
    +30°/+23°
    feels +34°0.8 mm · 57%11 km/hUV 8 · Hi
    05:5818:04
  • Fri, Sep 25Fri
    +30°/+23°
    feels +36°0 mm · 55%9 km/hUV 7 · Hi
    05:5918:03

Weather Insight

Vientiane's 15-day outlook ranges from a low of 23°C to a high of 32°C, with an average daytime high near 30°C. Air quality is currently Moderate (AQI 77), driven mainly by O₃ at 104 μg/m³.

Today vs Normal

32°C+2° above normal

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

14 of the last 28 days with published data ran above normal.

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

2026-08-28: 30°C30°2026-08-29: 27°C27°2026-08-30: 26°C26°2026-08-31: 30°C30°2026-09-01: 31°C31°2026-09-02: 32°C32°2026-09-03: 32°C32°2026-09-04: 30°C30°2026-09-05: 32°C32°2026-09-06: 31°C31°2026-09-07: 31°C31°2026-09-08: 32°C32°

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 Vientiane

Over the next 15 days, Vientiane is forecast to see temperatures ranging from 22°C to 32°C, averaging a daily high of 30°C. The extended outlook indicates significant rainfall totalling 147.3 mm spread across 14 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.