Today | Weather | Monday, April 27, 2026

Weather in Caldwell, Idaho

01:44 PM
Now
Cloudy Weather
61° F
Feels Like 68°
Precipitation 1 %
Wind 8 mph
UV Index (0 - 11+) 7
Humidity 29 %
Today
Cloudy Weather
Day 63°
Night 36°
Precipitation 25 %
Wind 7 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

Last updated on

Air Quality in Caldwell

NOW
63 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.64 µg/m³
PM10 1.24 µg/m³
O3 0.058 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.10 ppm
NH3 1.25 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.50.64 µg/m³
PM101.24 µg/m³
O3113.93 µg/m³
NO20.12 µg/m³
SO20.12 µg/m³
CO113.62 µg/m³
NH31.25 µg/m³
NO0.03 µg/m³