15-Day Weather Forecast - Hamilton

15-day weather forecast for Hamilton: temperatures from 2°C (36°F) to 17°C (63°F). Average daily high 15°C (59°F) over the next 15 days.

Hourly Forecast by Day

Today·22 Sep
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Temperature · peaks at +17°C

15-Day Temperature Trend

17°9°TodaySep14°6°Tmrw14°2°Thu15°4°Fri13°6°Sat14°6°Sun14°2°Mon16°6°Tue16°4°Wed16°11°ThuOct17°11°Fri16°11°Sat16°14°Sun17°14°Mon17°14°Tue
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Tue, Sep 22Today
    +17°/+9°
    feels +14°Rain 0.5mm · 100%27 km/hUV 3 · Mod
    06:0918:14
  • Wed, Sep 23Tomorrow
    +14°/+6°
    feels +10°Rain 0.4mm · 25%28 km/hUV 6 · Hi
    06:0718:15
  • Thu, Sep 24Thu
    +14°/+2°
    feels +11°0 mm · 2%22 km/hUV 6 · Hi
    06:0618:16
  • Fri, Sep 25Fri
    +15°/+4°
    feels +13°Rain 1.7mm · 59%20 km/hUV 6 · Mod
    06:0418:17
  • Sat, Sep 26Sat
    +13°/+6°
    feels +11°Rain 2.9mm · 66%20 km/hUV 6 · Mod
    06:0218:18
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  • Sun, Sep 27Sun
    +14°/+6°
    feels +11°Rain 16.6mm · 92%35 km/hUV 6 · Hi
    06:0118:19
  • Mon, Sep 28Mon
    +14°/+2°
    feels +10°Rain 0.6mm · 51%23 km/hUV 6 · Hi
    05:5918:20
  • Tue, Sep 29Tue
    +16°/+6°
    feels +16°0 mm · 14%14 km/hUV 6 · Hi
    05:5818:20
  • Wed, Sep 30Wed
    +16°/+4°
    feels +14°0 mm · 8%17 km/hUV 7 · Hi
    05:5618:21
  • Thu, Oct 1Thu
    +16°/+11°
    feels +13°Rain 0.6mm · 22%20 km/hUV 7 · Hi
    05:5518:22
  • Fri, Oct 2Fri
    +17°/+11°
    feels +16°0 mm · 25%17 km/hUV 4 · Mod
    05:5318:23
  • Sat, Oct 3Sat
    +16°/+11°
    feels +15°Rain 0.6mm · 24%20 km/hUV 7 · Hi
    05:5218:24
  • Sun, Oct 4Sun
    +16°/+14°
    feels +14°Rain 7.7mm · 34%27 km/hUV 5 · Mod
    05:5018:25
  • Mon, Oct 5Mon
    +17°/+14°
    feels +14°Rain 11.8mm · 32%29 km/hUV 4 · Mod
    05:4818:26
  • Tue, Oct 6Tue
    +17°/+14°
    feels +18°Rain 19.3mm · 34%18 km/hUV 4 · Mod
    05:4718:27

Weather Insight

Hamilton's 15-day outlook ranges from a low of 2°C to a high of 17°C, with an average daytime high near 15°C. Air quality is currently Moderate (AQI 63), driven mainly by PM2.5 at 17 μg/m³.

Today vs Normal

17°C+2° above normal

The long-term average high for today is 15°C.

25 of the last 30 days with published data ran above normal.

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

2026-09-10: 15°C15°2026-09-11: 15°C15°2026-09-12: 16°C16°2026-09-13: 16°C16°2026-09-14: 17°C17°2026-09-15: 15°C15°2026-09-16: 14°C14°2026-09-17: 17°C17°2026-09-18: 18°C18°2026-09-19: 15°C15°2026-09-20: 14°C14°2026-09-21: 14°C14°

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 Hamilton

Over the next 15 days, Hamilton is forecast to see temperatures ranging from 2°C to 18°C, averaging a daily high of 15°C. The extended outlook indicates significant rainfall totalling 62.7 mm spread across 11 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.