Today's Weather Forecast - Boulder
Today's weather in Boulder. high 31°C (88°F), low 16°C (61°F). Mainly Clear.
Today’s Hourly Weather Outlook
- Wind speed
- 13 km/h
- Rain probability
- 1%
- Wind speed
- 21 km/h
- Rain probability
- 1%
- Wind speed
- 20 km/h
- Rain probability
- 2%
- Wind speed
- 15 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: PM2.5
- Monitoring station
- Athens, Boulder-CU, Colorado, USA
- PM2.5
- 9μg/m³
- PM10
- 9μg/m³
- O₃
- 14ppb
- NO₂
- 9.2ppb
- SO₂
- 0.6ppb
- CO
- 1.9ppm
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Boulder is forecast to reach a high of 31°C today, with an overnight low around 16°C. That's 4° above the long-term average high of 27°C for this time of year. It continues a recent pattern — 24 of the last 28 days with published data have run warmer than normal. Expect little chance of rain (2% probability) and moderate breezes averaging 21 km/h. Air quality is currently good (AQI 22), with no notable outdoor health concerns.
Today vs Normal
The long-term average high for today is 27°C.
24 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.