Today | Weather | Wednesday, August 12, 2026

Active Weather Warnings

Air Quality Alert

Weather in Caldwell, Idaho

05:15 AM

Now

66° F

Feels Like 64°

Precipitation 0 %

Wind 9 mph

Humidity 43 %

Today

Day 95°

Night 64°

Precipitation 0 %

Wind 8 mph

UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Caldwell Weather Forecast Updated

29 minutes ago

Last updated on August 12, 2026 at 4:46 AM

Air Quality in Caldwell

NOW

113 AQI

Unhealthy air quality for sensitive groups Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 40.49 µg/m³

PM₁₀ 41.7 µg/m³

O₃ 0.049 ppm

NO₂ 0.8 ppb

SO₂ 0 ppb

CO 0.15 ppm

NH₃ 3.4 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 40.49 µg/m³

PM₁₀ – 41.7 µg/m³

O₃ – 96.61 µg/m³

NO₂ – 1.46 µg/m³

SO₂ – 0.12 µg/m³

CO – 170.74 µg/m³

NH₃ – 3.4 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Caldwell

Air Quality Alert

Air Quality Alert issued August 10 at 8:40PM MDT by NWS Boise ID

Aug 10, 8:40 PM → Aug 12, 12:00 PM

WHAT: Air Quality Advisory because of degraded air quality due to
wildfire smoke.

Air Quality Index is forecast to be Unhealthy.

WHERE: Ada, Adams, Canyon, Gem, Owyhee, Payette,and Washington
Counties.

WHEN: UNTIL 1 PM MDT WEDNESDAY.

IMPACTS: Everyone may begin to experience health effects; members
of sensitive groups may experience more serious health effects.

+ Read More

Air pollutants can cause breathing difficulties for children, the elderly, as well as persons with respiratory problems. Those individuals who are sensitive to increased particulate matter or smoke are encouraged to avoid prolonged or strenuous outdoor activity during this advisory. Open burning is prohibited by air quality rule. It is also recommended that all other individuals limit prolonged or strenuous activity outdoors. THIS STATEMENT IS ISSUED BY THE IDAHO DEPARTMENT OF ENVIRONMENTAL QUALITY, AIR QUALITY GROUP FOR MORE INFORMATION, CONTACT DEQ's Boise Regional Office at (208) 373-0550 Twin Falls Regional Office at (208) 736-2190

Updated: Aug 12, 4:46 AM Source: NWS Alert