Today | Weather | Tuesday, June 9, 2026

Weather in Caldwell, Idaho

05:52 PM
Now
Cloudy Weather
75° F
Feels Like 73°
Precipitation 20 %
Wind 13 mph
UV Index (0 - 11+) 2
Humidity 20 %
Today
Sunny with a Chance of Thunderstorms
Day 75°
Night 48°
Precipitation 55 %
Wind 12 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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

Last updated on

Air Quality in Caldwell

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.68 µg/m³
O3 0.043 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.07 ppm
NH3 0.52 µg/m³
NO 0.03 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)
PM2.50.5 µg/m³
PM100.68 µg/m³
O384.84 µg/m³
NO20.14 µg/m³
SO20 µg/m³
CO75.95 µg/m³
NH30.52 µg/m³
NO0.03 µg/m³