15-Day Weather Forecast - Mississauga

15-day weather forecast for Mississauga: temperatures from 7°C (45°F) to 30°C (86°F). Average daily high 21°C (70°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +22°C

15-Day Temperature Trend

22°11°TodaySep24°12°Tmrw26°15°Sun20°11°Mon20°12°Tue24°18°Wed20°17°Thu30°17°Fri21°14°Sat16°13°Sun14°13°Mon14°13°Tue21°13°Wed25°16°Thu14°7°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +22°/+11°
    feels +22°11 km/hUV 6 · Mod
    06:5319:35
  • Sat, Sep 12Tomorrow
    +24°/+12°
    feels +26°0 mm · 15%11 km/hUV 5 · Mod
    06:5419:34
  • Sun, Sep 13Sun
    +26°/+15°
    feels +25°0.5 mm · 13%26 km/hUV 5 · Mod
    06:5519:32
  • Mon, Sep 14Mon
    +20°/+11°
    feels +17°0 mm · 13%14 km/hUV 6 · Mod
    06:5719:30
  • Tue, Sep 15Tue
    +20°/+12°
    feels +18°0 mm · 40%18 km/hUV 4 · Mod
    06:5819:28
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  • Wed, Sep 16Wed
    +24°/+18°
    feels +25°0 mm · 40%9 km/hUV 3 · Mod
    06:5919:26
  • Thu, Sep 17Thu
    +20°/+17°
    feels +21°2.7 mm · 37%18 km/hUV 2 · Low
    07:0019:24
  • Fri, Sep 18Fri
    +30°/+17°
    feels +30°8.1 mm · 25%27 km/hUV 5 · Mod
    07:0119:23
  • Sat, Sep 19Sat
    +21°/+14°
    feels +22°9.0 mm · 14%22 km/hUV 5 · Mod
    07:0219:21
  • Sun, Sep 20Sun
    +16°/+13°
    feels +14°0 mm · 11%14 km/hUV 4 · Mod
    07:0319:19
  • Mon, Sep 21Mon
    +14°/+13°
    feels +13°3.0 mm · 9%22 km/hUV 1 · Low
    07:0419:17
  • Tue, Sep 22Tue
    +14°/+13°
    feels +13°1.2 mm · 10%22 km/hUV 1 · Low
    07:0519:15
  • Wed, Sep 23Wed
    +21°/+13°
    feels +20°0 mm · 16%12 km/hUV 4 · Mod
    07:0719:14
  • Thu, Sep 24Thu
    +25°/+16°
    feels +26°2.1 mm · 13%25 km/hUV 4 · Mod
    07:0819:12
  • Fri, Sep 25Fri
    +14°/+7°
    feels +11°10.2 mm · 19%24 km/hUV 3 · Low
    07:0919:10

Weather Insight

Mississauga's 15-day outlook ranges from a low of 7°C to a high of 30°C, with an average daytime high near 21°C. Air quality is currently good (AQI 22), with no notable outdoor health concerns.

Today vs Normal

22°C+1° above normal

The long-term average high for today is 21°C.

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

It continues that pattern - today's forecast is also running above normal.

2026-08-28: 23°C23°2026-08-29: 24°C24°2026-08-30: 22°C22°2026-08-31: 22°C22°2026-09-01: 27°C27°2026-09-02: 26°C26°2026-09-03: 27°C27°2026-09-04: 25°C25°2026-09-05: 24°C24°2026-09-06: 22°C22°2026-09-07: 24°C24°2026-09-08: 24°C24°

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 Mississauga

Over the next 15 days, Mississauga is forecast to see temperatures ranging from 6°C to 31°C, averaging a daily high of 21°C. The extended outlook indicates significant rainfall totalling 36.8 mm spread across 8 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.