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Hourly Weather | Today › Thursday, March 12, 2026
Active Weather Warnings
Great Falls, Montana
8 AM
Cloudy Weather
45°
Feels Like 28°
34
Humidity: 53%
UV Index: 0
Wind: 31 mph
9 AM
Cloudy Weather
45°
Feels Like 28°
34
Humidity: 52%
UV Index: 0
Wind: 32 mph
10 AM
Cloudy Weather
45°
Feels Like 30°
40
Humidity: 45%
UV Index: 1
Wind: 35 mph
11 AM
Rainy Weather
45°
Feels Like 28°
47
Humidity: 41%
UV Index: 1
Wind: 34 mph
12 PM
Cloudy Weather
45°
Feels Like 30°
40
Humidity: 36%
UV Index: 1
Wind: 34 mph
1 PM
Rainy Weather
45°
Feels Like 27°
47
Humidity: 35%
UV Index: 1
Wind: 35 mph
2 PM
Cloudy Weather
43°
Feels Like 27°
40
Humidity: 35%
UV Index: 1
Wind: 35 mph
3 PM
Cloudy Weather
43°
Feels Like 27°
34
Humidity: 36%
UV Index: 1
Wind: 34 mph
4 PM
Cloudy Weather
43°
Feels Like 27°
36
Humidity: 38%
UV Index: 1
Wind: 30 mph
5 PM
Cloudy Weather
41°
Feels Like 27°
43
Humidity: 41%
UV Index: 0
Wind: 25 mph
6 PM
Rainy Weather
41°
Feels Like 23°
47
Humidity: 43%
UV Index: 0
Wind: 22 mph
7 PM
Rainy Weather
39°
Feels Like 23°
47
Humidity: 46%
UV Index: 0
Wind: 20 mph
8 PM
Cloudy Weather
36°
Feels Like 23°
25
Humidity: 52%
UV Index: 0
Wind: 16 mph
9 PM
Cloudy Weather
34°
Feels Like 23°
20
Humidity: 57%
UV Index: 0
Wind: 12 mph
10 PM
Cloudy Weather
34°
Feels Like 25°
20
Humidity: 62%
UV Index: 0
Wind: 11 mph
11 PM
Cloudy Weather
32°
Feels Like 23°
20
Humidity: 70%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
35 AQI
Good air quality Dominant pollutant: O3
Details

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

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

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 Expected Likely

High Wind Warning

High Wind Warning issued March 12 at 5:45AM MDT until March 12 at 6:00PM MDT by NWS Great Falls MT
Mar 12, 5:45 AM → Mar 12, 6:00 PM
WHAT: West winds 35 to 55 mph, with gusts of between 70 and 90
mph.

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

WHEN: Until 6 PM MDT this evening.

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

ADDITIONAL DETAILS: The most intense are likely to occur through
2 PM Thursday.
+ Read More
Those traveling with high profile or light weight vehicles should consider delaying travel or find an alternate route.
Updated: Mar 12, 5:50 AM 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, 5:50 AM Source: NWS Alert