Today | Weather | Wednesday, May 20, 2026

Weather in Idaho Falls, Idaho

03:53 PM
Now
Cloudy Weather
66° F
Feels Like 70°
Precipitation 2 %
Wind 13 mph
UV Index (0 - 11+) 5
Humidity 20 %
Today
Cloudy Weather
Day 66°
Night 39°
Precipitation 14 %
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.

Idaho Falls Weather Forecast Updated

Last updated on

Air Quality in Idaho Falls

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.88 µg/m³
PM10 1.71 µg/m³
O3 0.049 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.08 ppm
NH3 1.64 µg/m³
NO 0.05 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)
PM2.50.88 µg/m³
PM101.71 µg/m³
O396.43 µg/m³
NO20.26 µg/m³
SO20.05 µg/m³
CO96.4 µg/m³
NH31.64 µg/m³
NO0.05 µg/m³