Today | Weather | Tuesday, April 7, 2026
Active Weather Warnings

Weather in Great Falls, Montana

04:02 AM
Now
Cloudy Night
48° F
Feels Like 39°
Precipitation 0 %
Wind 17 mph
Humidity 51 %
Today
Windy Weather
Day 66°
Night 19°
Precipitation 25 %
Wind 25 mph
UV Index (0 - 11+) 5
Tomorrow Morning Frost 5 AM – 8 AM

Warning: Strong Winds Today: 25 mph

Great Falls Weather Forecast Updated

10 minutes ago
Last updated on

Air Quality in Great Falls

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.4 µg/m³
PM10 1.76 µg/m³
O3 0.024 ppm
NO2 2 ppb
SO2 0 ppb
CO 0.12 ppm
NH3 4.36 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)
PM2.51.4 µg/m³
PM101.76 µg/m³
O347.94 µg/m³
NO23.72 µg/m³
SO20.02 µg/m³
CO141.19 µg/m³
NH34.36 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Great Falls

Severe Future Possible

High Wind Watch

High Wind Watch issued April 5 at 11:58AM MDT until April 7 at 9:00PM MDT by NWS Great Falls MT
Apr 7, 9:00 AM Apr 7, 9:00 PM
WHAT: West winds 30 to 40 mph with gusts up to 75 mph possible.
The strongest winds will occur along and west of the Interstate 15
corridor and south of the Montana Hwy 200 corridor.

WHERE: Cascade County, including the Little Belt and Highwood
Mountains, Eastern Toole and Liberty Counties, Eastern Pondera and
Eastern Teton Counties, Western and Central Chouteau County,
Judith Basin County and Judith Gap, Upper Blackfoot and MacDonald
Pass, and Big Belt, Bridger and Castle Mountains.

WHEN: From Tuesday morning through Tuesday evening.

IMPACTS: Damaging winds may blow down trees and power lines.
Power outages are possible. Travel could be very difficult,
especially for high profile vehicles. Blowing dust could reduce
visibility at times.

ADDITIONAL DETAILS: Blowing dust may significantly reduce
visibility at times, especially along Interstate 15 between Shelby
and the Canadian border.
+ Read More
Monitor the latest forecasts and warnings for updates.
Updated: Apr 5, 10:21 PM Source: NWS Alert