15-Day Weather Forecast - Rosario

15-day weather forecast for Rosario: temperatures from 6°C (43°F) to 28°C (82°F). Average daily high 20°C (68°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +17°C

15-Day Temperature Trend

17°12°TodaySep13°8°Tmrw12°7°Sun15°6°Mon19°8°Tue17°7°Wed21°11°Thu22°12°Fri26°13°Sat28°17°Sun24°17°Mon17°13°Tue18°10°Wed22°12°Thu25°15°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +17°/+12°
    feels +15°1.0 mm · 51%17 km/hUV 5 · Mod
    07:0618:51
  • Sat, Sep 12Tomorrow
    +13°/+8°
    feels +10°1.9 mm · 29%21 km/hUV 1 · Low
    07:0518:52
  • Sun, Sep 13Sun
    +12°/+7°
    feels +10°0 mm · 15%14 km/hUV 4 · Mod
    07:0418:53
  • Mon, Sep 14Mon
    +15°/+6°
    feels +12°10 km/hUV 6 · Mod
    07:0218:53
  • Tue, Sep 15Tue
    +19°/+8°
    feels +18°13 km/hUV 6 · Hi
    07:0118:54
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  • Wed, Sep 16Wed
    +17°/+7°
    feels +15°13 km/hUV 7 · Hi
    07:0018:55
  • Thu, Sep 17Thu
    +21°/+11°
    feels +21°13 km/hUV 7 · Hi
    06:5818:55
  • Fri, Sep 18Fri
    +22°/+12°
    feels +21°0 mm · 1%11 km/hUV 7 · Hi
    06:5718:56
  • Sat, Sep 19Sat
    +26°/+13°
    feels +27°0 mm · 4%11 km/hUV 4 · Mod
    06:5618:57
  • Sun, Sep 20Sun
    +28°/+17°
    feels +29°12.0 mm · 24%15 km/hUV 7 · Hi
    06:5418:57
  • Mon, Sep 21Mon
    +24°/+17°
    feels +23°24.0 mm · 31%16 km/hUV 6 · Hi
    06:5318:58
  • Tue, Sep 22Tue
    +17°/+13°
    feels +15°0 mm · 20%15 km/hUV 7 · Hi
    06:5218:59
  • Wed, Sep 23Wed
    +18°/+10°
    feels +17°0 mm · 18%9 km/hUV 7 · Hi
    06:5018:59
  • Thu, Sep 24Thu
    +22°/+12°
    feels +21°0 mm · 20%13 km/hUV 5 · Mod
    06:4919:00
  • Fri, Sep 25Fri
    +25°/+15°
    feels +25°0 mm · 19%15 km/hUV 3 · Mod
    06:4819:01

Weather Insight

Rosario's 15-day outlook ranges from a low of 6°C to a high of 28°C, with an average daytime high near 20°C. That's 2° below the long-term average high of 22°C for this time of year. It continues a recent pattern — 9 of the last 28 days with published data have run cooler than normal. Air quality is currently good (AQI 18), with no notable outdoor health concerns.

Today vs Normal

17°C-5° below normal

The long-term average high for today is 22°C.

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

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

2026-08-28: 21°C21°2026-08-29: 22°C22°2026-08-30: 25°C25°2026-08-31: 21°C21°2026-09-01: 23°C23°2026-09-02: 26°C26°2026-09-03: 21°C21°2026-09-04: 21°C21°2026-09-05: 16°C16°2026-09-06: 14°C14°2026-09-07: 16°C16°2026-09-08: 21°C21°

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 Rosario

Over the next 15 days, Rosario is forecast to see temperatures ranging from 6°C to 28°C, averaging a daily high of 20°C. The extended outlook indicates significant rainfall totalling 38.9 mm spread across 4 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.