Today | Weather | Thursday, February 5, 2026

Active Weather Warnings

Air Stagnation Advisory

Weather in Boise, Idaho

06:34 PM

Now

52° F

Feels Like 50°

Precipitation 0 %

Wind 5 mph

Humidity 51 %

Today

Day 57°

Night 30°

Precipitation 0 %

Wind 5 mph

UV Index (0 - 11+) 3

Boise Weather Forecast Updated

51 seconds ago

Last updated on February 05, 2026 at 6:33 PM

Air Quality in Boise

NOW

32 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.05 µg/m³

PM₁₀ 5.34 µg/m³

O₃ 0.034 ppm

NO₂ 1 ppb

SO₂ 0 ppb

CO 0.13 ppm

NH₃ 2.7 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 3.05 µg/m³

PM₁₀ – 5.34 µg/m³

O₃ – 67.1 µg/m³

NO₂ – 1.91 µg/m³

SO₂ – 0.02 µg/m³

CO – 147.17 µg/m³

NH₃ – 2.7 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Boise

Moderate Expected Likely

Air Stagnation Advisory

Air Stagnation Advisory issued February 5 at 1:27PM MST until February 9 at 5:00AM MST by NWS Boise ID

Feb 5, 1:27 PM → Feb 9, 5:00 AM

WHAT: An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will continue to trap pollutants.

WHERE: Portions of south central and southwest Idaho and
northeast and southeast Oregon.

WHEN: Until 5 AM MST /4 AM PST/ Monday.

IMPACTS: Poor air quality may cause issues for people with
respiratory problems.

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Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air.

Updated: Feb 5, 6:33 PM Source: NWS Alert