Today | Weather | Monday, July 20, 2026
Active Weather Warnings

Weather in Idaho Falls, Idaho

03:22 PM
Now
Cloudy Weather
93° F
Feels Like 99°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 7
Humidity 17 %
Today
Hot Day
Day 100°
Night 61°
Precipitation 0 %
Wind 8 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

23 minutes ago
Last updated on

Air Quality in Idaho Falls

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.78 µg/m³
PM10 5.77 µg/m³
O3 0.048 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.07 ppm
NH3 1.51 µg/m³
NO 0.06 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)
PM2.53.78 µg/m³
PM105.77 µg/m³
O394.91 µg/m³
NO20.3 µg/m³
SO20.19 µg/m³
CO77.6 µg/m³
NH31.51 µg/m³
NO0.06 µg/m³

Weather Alerts and Warnings for Idaho Falls

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 20 at 12:04AM MDT until July 20 at 8:00PM MDT by NWS Pocatello ID
Jul 20, 12:00 PM Jul 20, 8:00 PM
WHAT: Temperatures up to 100 expected.

WHERE: Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake
Desert, Franklin/Eastern Oneida Region, Lower Snake River Plain,
Marsh and Arbon Highlands, Raft River Region, Southern Hills/Albion
Mountains, and Upper Snake River Plain.

WHEN: From noon today to 8 PM MDT this evening.

IMPACTS: Hot temperatures may cause heat illnesses.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Jul 20, 2:59 PM Source: NWS Alert