Today | Weather | Tuesday, January 13, 2026

Active Weather Warnings

Air Stagnation Advisory

Weather in Nampa, Idaho

01:31 PM

Now

37° F

Feels Like 39°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 2

Humidity 75 %

Today

Day 39°

Night 25°

Precipitation 0 %

Wind 5 mph

UV Index (0 - 11+) 2

Nampa Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (January 13, 2025)

Day

41°

Night

23°

Wind

7 mph

UV Index

Precipitation

0 %

Air Quality in Nampa

NOW

33 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5.48 µg/m³

PM₁₀ 6.55 µg/m³

O₃ 0.035 ppm

NO₂ 1.2 ppb

SO₂ 0.2 ppb

CO 0.12 ppm

NH₃ 1.12 µg/m³

NO 0.58 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 – 5.48 µg/m³

PM₁₀ – 6.55 µg/m³

O₃ – 69.52 µg/m³

NO₂ – 2.34 µg/m³

SO₂ – 0.63 µg/m³

CO – 135.63 µg/m³

NH₃ – 1.12 µg/m³

NO – 0.58 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Nampa

Moderate Expected Likely

Air Stagnation Advisory

Air Stagnation Advisory issued January 12 at 11:50AM MST until January 19 at 5:00AM MST by NWS Boise ID

Jan 12, 11:50 AM → Jan 19, 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: Jan 13, 10:29 AM Source: NWS Alert