Today | Weather | Thursday, February 26, 2026
Active Weather Warnings

Weather in Great Falls, Montana

12:22 AM
Now
Cloudy Night
32° F
Feels Like 16°
Precipitation 0 %
Wind 22 mph
Humidity 53 %
Today
Windy Weather
Day 50°
Night 36°
Precipitation 0 %
Wind 32 mph
UV Index (0 - 11+) 2

Warning: Strong Winds Today: 32 mph

Great Falls Weather Forecast Updated

Last updated on

Air Quality in Great Falls

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.6 µg/m³
PM10 0.65 µg/m³
O3 0.051 ppm
NO2 0.4 ppb
SO2 0 ppb
CO 0.10 ppm
NH3 0.14 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)
PM2.50.6 µg/m³
PM100.65 µg/m³
O3100.4 µg/m³
NO20.81 µg/m³
SO20.04 µg/m³
CO119.53 µg/m³
NH30.14 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Great Falls

Severe Future Possible

High Wind Watch

High Wind Watch issued February 24 at 1:15PM MST until February 27 at 8:00AM MST by NWS Great Falls MT
Feb 25, 11:00 PM Feb 27, 8:00 AM
WHAT: For the High Wind Warning, west winds 30 to 40 mph with
gusts up to 70 mph expected. For the High Wind Watch, southwest
winds 30 to 40 mph with gusts up to 70 mph possible.

WHERE: Cascade County, including the Little Belt and Highwood
Mountains, Judith Basin County and Judith Gap, Upper Blackfoot and
MacDonald Pass, Gates of the Mountains, Helena Valley, and Big
Belt, Bridger and Castle Mountains.

WHEN: For the High Wind Warning, from 2 AM to 11 PM MST
Wednesday. For the High Wind Watch, from Wednesday evening through
Friday morning.

IMPACTS: High winds may move loose debris, damage property and
cause power outages. Travel could be difficult, especially for
high profile vehicles.
+ Read More
People are urged to secure loose objects that could be blown around or damaged by the wind. Monitor the latest forecasts and warnings for updates.
Updated: Feb 24, 8:39 PM Source: NWS Alert