Today's Weather Forecast - Hamilton
Today's weather in Hamilton. high 25°C (77°F), low 13°C (55°F). Sunny.
Today’s Hourly Weather Outlook
- Wind speed
- 10 km/h
- Rain probability
- 0%
- Wind speed
- 11 km/h
- Rain probability
- 0%
- Wind speed
- 11 km/h
- Rain probability
- 0%
- Wind speed
- 10 km/h
- Rain probability
- 0%
24-Hour Rain & Temperature Forecast
Sunrise & Sunset
Air Quality Index & Health Advice
Air Quality Index
- Air quality level
- Good
- Dominant pollutant
- Dominant: O3
- Monitoring station
- Hamilton Downtown, Ontario, Canada
- PM2.5
- 17μg/m³
- O₃
- 27.2ppb
- NO₂
- 1.7ppb
- SO₂
- 0.3ppb
- CO
- 2.4ppm
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Hamilton is forecast to reach a high of 25°C today, with an overnight low around 13°C. That's 1° above the long-term average high of 24°C for this time of year. It continues a recent pattern — 19 of the last 28 days with published data have run warmer than normal. Expect little chance of rain (0% probability) and a gentle breeze averaging 11 km/h. Air quality is currently good (AQI 23), with no notable outdoor health concerns.
Today vs Normal
The long-term average high for today is 24°C.
19 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.