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Today | Weather | Thursday, March 12, 2026
Active Weather Warnings

Weather in Great Falls, Montana

07:58 AM
Now
Rainy Weather
45° F
Feels Like 25°
Precipitation 52 %
Wind 35 mph
UV Index (0 - 11+) 0
Humidity 56 %
Today
Rainy Weather
Day 46°
Night 27°
Precipitation 81 %
Wind 31 mph
UV Index (0 - 11+) 1
FROST FORECAST
Tomorrow Morning Frost 6 AM – 9 AM

Warning: Strong Winds Today: 31 mph

Great Falls Weather Forecast Updated

15 minutes ago
Last updated on

Air Quality in Great Falls

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.5 µg/m³
O3 0.038 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 0.06 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)
PM2.5 – 0.5 µg/m³
PM10 – 0.5 µg/m³
O3 – 74.15 µg/m³
NO2 – 0.24 µg/m³
SO2 – 0 µg/m³
CO – 97.43 µg/m³
NH3 – 0.06 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for Great Falls

Severe Future Possible

High Wind Watch

High Wind Watch issued March 10 at 2:05AM MDT until March 12 at 6:00PM MDT by NWS Great Falls MT
Mar 11, 6:00 PM → Mar 12, 6:00 PM
WHAT: Southwest winds 35 to 55 mph, with gusts up to 70 mph
possible. Higher winds gusts up to 95 mph possible along the Rocky
Mountain Front

WHERE: Portions of central, north central, and southwest Montana.

WHEN: From Wednesday evening through Thursday afternoon.

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
significantly reduce visibility at times.
+ Read More
Monitor the latest forecasts and warnings for updates. Remember, a High Wind Watch means that there is at least a 50% chance of 40 mph sustained winds or 58 mph wind gusts occurring during the watch period.
Updated: Mar 10, 12:51 PM Source: NWS Alert
Severe Future Possible

Winter Storm Watch

Winter Storm Watch issued March 11 at 5:53PM MDT until March 14 at 6:00PM MDT by NWS Great Falls MT
Mar 12, 6:00 PM → Mar 14, 6:00 PM
WHAT: Heavy snow possible. Total snow accumulations between 6 and
12 inches possible.

WHERE: The Interstate 15 Corridor north of Power, Eastern Toole
and Liberty Counties, Western and Central Chouteau County, and
Cascade County below 5000ft.

WHEN: From Thursday evening through Saturday afternoon.

IMPACTS: Travel could be very difficult with falling and blowing
snow significantly reducing visibility at times.
+ Read More
Monitor the latest forecasts for updates on this situation. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.
Updated: Mar 12, 12:08 AM Source: NWS Alert
Severe Expected Likely

Winter Storm Warning

Winter Storm Warning issued March 12 at 12:46AM MDT until March 14 at 6:00PM MDT by NWS Great Falls MT
Mar 12, 6:00 PM → Mar 14, 6:00 PM
WHAT: Heavy snow expected. Total snow accumulations between 6 and
13 inches.

WHERE: Eastern Pondera and Eastern Teton Counties, and Cascade
County below 5000ft.

WHEN: From 6 PM this evening to 6 PM MDT Saturday.

IMPACTS: Travel could be very difficult to impossible. The
hazardous conditions could impact the Thursday evening and Friday
morning commutes. Gusty winds could bring down tree branches.

ADDITIONAL DETAILS: This will be a mult-day snowfall, with lulls
in the snow at times.
+ Read More
If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock. Remember, a Winter Storm Warning means that there is at least an 80% chance of impactful winter weather conditions during the warning period.
Updated: Mar 12, 7:41 AM Source: NWS Alert