Today | Weather | Wednesday, April 15, 2026

Weather in Caldwell, Idaho

04:14 AM
Now
Rainy Weather
48° F
Feels Like 43°
Precipitation 73 %
Wind 8 mph
Humidity 68 %
Today
Rainy Weather
Day 55°
Night 36°
Precipitation 68 %
Wind 12 mph
UV Index (0 - 11+) 2

Caldwell Weather Forecast Updated

4 minutes ago
Last updated on

Air Quality in Caldwell

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.51 µg/m³
PM10 1.25 µg/m³
O3 0.047 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.10 ppm
NH3 3.55 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)
PM2.50.51 µg/m³
PM101.25 µg/m³
O392.55 µg/m³
NO20.27 µg/m³
SO20.01 µg/m³
CO111.09 µg/m³
NH33.55 µg/m³
NO0 µg/m³