Today | Weather | Wednesday, February 25, 2026

Weather in Caldwell, Idaho

10:44 PM
Now
Cloudy Night
41° F
Feels Like 37°
Precipitation 7 %
Wind 7 mph
Humidity 75 %
Today
Partly Sunny with Showers
Day 59°
Night 27°
Precipitation 85 %
Wind 8 mph
UV Index (0 - 11+) 2
Tomorrow Morning Frost 5 AM – 8 AM

Caldwell Weather Forecast Updated

Air Quality in Caldwell

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.55 µg/m³
PM10 1.19 µg/m³
O3 0.025 ppm
NO2 1.2 ppb
SO2 0 ppb
CO 0.12 ppm
NH3 2.38 µg/m³
NO 0 µg/m³
PM2.5 – 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)
PM2.50.55 µg/m³
PM101.19 µg/m³
O348.73 µg/m³
NO22.18 µg/m³
SO20 µg/m³
CO135.02 µg/m³
NH32.38 µg/m³
NO0 µg/m³