Hourly Weather Forecast for Boulder, Colorado

Hourly Weather | Today › Tuesday, June 9, 2026

Active Weather Warnings

Fire Weather Watch

Boulder, Colorado

6 PM

82°

Feels Like 79°

Humidity: 25%

UV Index: 1

Wind: 9 mph

7 PM

82°

Feels Like 81°

Humidity: 18%

UV Index: 1

Wind: 13 mph

8 PM

81°

Feels Like 77°

Humidity: 18%

UV Index: 0

Wind: 10 mph

9 PM

77°

Feels Like 73°

Humidity: 18%

UV Index: 0

Wind: 9 mph

10 PM

73°

Feels Like 72°

Humidity: 20%

UV Index: 0

Wind: 9 mph

11 PM

70°

Feels Like 66°

Humidity: 23%

UV Index: 0

Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 PM

39 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.59 µg/m³
PM₁₀: 3.23 µg/m³
O₃: 0.043 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.6 µg/m³
PM₁₀: 3.16 µg/m³
O₃: 0.041 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

36 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.6 µg/m³
PM₁₀: 3.06 µg/m³
O₃: 0.039 ppm
NO₂: 0.4 ppb
SO₂: 0 ppb
CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

35 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.62 µg/m³
PM₁₀: 3.07 µg/m³
O₃: 0.038 ppm
NO₂: 0.5 ppb
SO₂: 0 ppb
CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

34 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.64 µg/m³
PM₁₀: 3.09 µg/m³
O₃: 0.036 ppm
NO₂: 0.6 ppb
SO₂: 0 ppb
CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.7 µg/m³
PM₁₀: 3.17 µg/m³
O₃: 0.034 ppm
NO₂: 0.7 ppb
SO₂: 0 ppb
CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Boulder

Severe Future Possible

Fire Weather Watch

Fire Weather Watch issued June 8 at 2:32AM MDT until June 9 at 9:00PM MDT by NWS Denver CO

Jun 9, 12:00 PM → Jun 9, 9:00 PM

* AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242,
243, 244, 245, 246, 247, 248, 249, 250 and 251.

* TIMING...From Tuesday afternoon through Tuesday evening.

* WINDS...Southwest 20 to 30 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 8 percent.

IMPACTS: Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.

+ Read More

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Updated: Jun 8, 12:35 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

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Pollutant Concentrations:

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Pollutant Concentrations:

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Pollutant Concentrations:

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Pollutant Concentrations:

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Weather Alerts and Warnings for Boulder

Fire Weather Watch

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