15-Day Weather Forecast - Pittsburgh

15-day weather forecast for Pittsburgh: temperatures from 11°C (52°F) to 32°C (90°F). Average daily high 25°C (77°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +27°C

15-Day Temperature Trend

27°19°TodaySep29°19°Tmrw26°20°Sun21°14°Mon25°11°Tue30°17°Wed32°20°Thu31°20°Fri23°16°Sat17°13°Sun17°14°Mon23°17°Tue22°14°Wed26°15°Thu20°11°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +27°/+19°
    feels +30°0 mm · 11%8 km/hUV 6 · Hi
    06:5719:35
  • Sat, Sep 12Tomorrow
    +29°/+19°
    feels +33°2.6 mm · 78%24 km/hUV 5 · Mod
    06:5719:33
  • Sun, Sep 13Sun
    +26°/+20°
    feels +28°4.9 mm · 78%12 km/hUV 4 · Mod
    06:5819:32
  • Mon, Sep 14Mon
    +21°/+14°
    feels +20°0.2 mm · 33%15 km/hUV 6 · Mod
    06:5919:30
  • Tue, Sep 15Tue
    +25°/+11°
    feels +25°0 mm · 4%10 km/hUV 6 · Mod
    07:0019:28
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  • Wed, Sep 16Wed
    +30°/+17°
    feels +32°0.3 mm · 20%7 km/hUV 5 · Mod
    07:0119:27
  • Thu, Sep 17Thu
    +32°/+20°
    feels +36°5.7 mm · 49%8 km/hUV 6 · Mod
    07:0219:25
  • Fri, Sep 18Fri
    +31°/+20°
    feels +32°0.6 mm · 33%14 km/hUV 6 · Mod
    07:0319:23
  • Sat, Sep 19Sat
    +23°/+16°
    feels +25°2.4 mm · 23%13 km/hUV 3 · Low
    07:0419:22
  • Sun, Sep 20Sun
    +17°/+13°
    feels +15°14.4 mm · 23%15 km/hUV 2 · Low
    07:0519:20
  • Mon, Sep 21Mon
    +17°/+14°
    feels +18°52.2 mm · 12%13 km/hUV 0 · Low
    07:0619:18
  • Tue, Sep 22Tue
    +23°/+17°
    feels +24°0.9 mm · 11%9 km/hUV 3 · Mod
    07:0719:17
  • Wed, Sep 23Wed
    +22°/+14°
    feels +23°0 mm · 16%6 km/hUV 4 · Mod
    07:0819:15
  • Thu, Sep 24Thu
    +26°/+15°
    feels +27°0 mm · 19%7 km/hUV 6 · Mod
    07:0919:13
  • Fri, Sep 25Fri
    +20°/+11°
    feels +21°0 mm · 17%18 km/hUV 3 · Low
    07:1019:12

Weather Insight

Pittsburgh's 15-day outlook ranges from a low of 11°C to a high of 32°C, with an average daytime high near 25°C. That's 1° below the long-term average high of 26°C for this time of year. It continues a recent pattern — 6 of the last 28 days with published data have run cooler than normal. Air quality is currently good (AQI 48), with no notable outdoor health concerns.

Today vs Normal

27°C+1° above normal

The long-term average high for today is 26°C.

6 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: 25°C25°2026-08-29: 27°C27°2026-08-30: 28°C28°2026-08-31: 29°C29°2026-09-01: 30°C30°2026-09-02: 31°C31°2026-09-03: 30°C30°2026-09-04: 26°C26°2026-09-05: 26°C26°2026-09-06: 25°C25°2026-09-07: 26°C26°2026-09-08: 27°C27°

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

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Extended Outlook for Pittsburgh

Over the next 15 days, Pittsburgh is forecast to see temperatures ranging from 11°C to 33°C, averaging a daily high of 25°C. The extended outlook indicates significant rainfall totalling 84.2 mm spread across 10 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.