Great Falls, MT 59401 Weather

Cascade County7:28 AM MDT47.51°N, 111.27°W

Current conditions

Mostly Clear
37°
Mostly Clear
Feels like 33°
High 74°·Low 45°
WindWSW 5 mph
Humidity90%
Dew point34°
Pressure30.13 inHg
Visibility10.0 mi
Cloud cover25%
UV index0 Low
Sunrise7:53 AM
Sunset6:28 PM

Observed at Malmstrom Air Force Base · 1 hr ago

Forecast

10-day

  • Today

    Sunny. High near 74, with temperatures falling to around 71 in the afternoon. South southwest wind 2 to 7 mph.

  • Tonight

    Mostly clear. Low around 45, with temperatures rising to around 48 overnight. South southwest wind around 6 mph.

  • Thursday

    Sunny. High near 75, with temperatures falling to around 72 in the afternoon. South southwest wind around 5 mph.

National Weather Service forecast updated 3 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 33°
  2. 8 AM Mostly Sunny 36°
  3. 9 AM Sunny 39°
  4. 10 AM Sunny 47°
  5. 11 AM Sunny 54°
  6. 12 PM Sunny 60°
  7. 1 PM Sunny 66°
  8. 2 PM Sunny 69°
  9. 3 PM Sunny 71°
  10. 4 PM Sunny 73°
  11. 5 PM Sunny 71°
  12. 6 PM Clear 68°
  13. 7 PM Mostly Clear 64°
  14. 8 PM Mostly Clear 59°
  15. 9 PM Mostly Clear 57°
  16. 10 PM Mostly Clear 55°
  17. 11 PM Mostly Clear 54°
  18. Thu12 AM Mostly Clear 52°
  19. 1 AM Mostly Clear 52°
  20. 2 AM Partly Cloudy 51°
  21. 3 AM Partly Cloudy 50°
  22. 4 AM Mostly Clear 50°
  23. 5 AM Mostly Clear 48°
  24. 6 AM Sunny 47°

Daily forecast

Details
  1. TodayOct 21 Sunny Sunny45°74°
  2. ThuOct 22 Sunny Sunny28%44°75°
  3. FriOct 23 Rain Rain97%32°52°
  4. SatOct 24 Mostly Sunny Mostly Sunny11%30°48°
  5. SunOct 25 Chance Light Snow Chance Light Snow27%28°42°
  6. MonOct 26 Partly Sunny Partly Sunny15%30°45°
  7. TueOct 27 Slight Chance Rain And Snow Slight Chance Rain And Snow22%30°48°
  8. WedOct 28 Partly cloudy Partly cloudy30°57°
  9. ThuOct 29 Cloudy Cloudy30°46°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Great Falls

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Air quality

22
Good
Fine particles (PM2.5)

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

Great Falls, MT reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:53 AM
Sunset 6:28 PM
Daylight 10 h 34 min (−3 min 16 s tomorrow)
Waxing Gibbous · 77% lit
Moonrise 4:27 PM Moonset 2:37 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low54° / 31°
Record high80° (1915)
Record low10° (1930)
Wettest0.46 in (1975)
Month to date2.15 in (normal 0.75 in)

Great Falls Area, records since 1891. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in TFX, issued 2 hrs ago

Key Messages

- It will be mostly dry across North-central, Central, and Southwestern Montana through the day on Thursday.

- It will be windy across North-central Montana on Friday.

- Widespread precipitation returns late Thursday through Friday.

- Temperatures will be well-above seasonal averages through Thursday with temperatures cooling down Friday through this weekend.

Discussion

/Issued 140 AM MDT Wed Oct 21 2026/

- Meteorological Overview:

Today over Southwestern Montana there remains Southwest flow aloft with weak zonal flow (west-east) over North-central, and Central Montana. Due to slightly stronger warm air advection today temperatures will rebound to above seasonal averages. Across North- central and Central Montana it will be dry with a low chance for showers across Southwestern Montana today. See the Forecast Confidence & Scenarios Section for details. On Thursday there remains southerly flow aloft and an upper-level trough associated with a Pacific Cold front begins to move over North-central, Central, and Southwestern Montana by Thursday evening. This will allow temperatures to remain above seasonal averages with mostly dry weather until Thursday evening. Thursday evening into Friday morning precipitation will gradually spread over North-central, Central, and Southwestern Montana.

On Friday the upper-level trough merges with a shortwave trough moving south from Canada. This combined with the cold front that moved through will bring widespread precipitation and cooler temperatures (below seasonal averages) to the area. Due to the cold front that moved through Thursday evening into Friday morning snow-levels will lower and the precipitation that falls in mountain areas on Friday will transition from rain to snow by Friday evening. On Friday there is an increasing pressure gradient and strong low-level and mid-level winds. This will bring windy conditions to North-central Montana on Friday. On Saturday an upper-level ridge begins to build in over North-central, Central, and Southwestern Montana. This will allow the area to dry out with cool temperatures lingering.

On Sunday the upper-level ridge remains over North-central, Central, and Southwestern Montana. This will keep dry and cool (below seasonal averages) weather for the area on Sunday. Monday through Tuesday an upper-level trough moves over North-central, Central, and Southwestern Montana. This will bring cooler temperatures and widespread precipitation to the area on Monday and Tuesday. -IG

- Forecast Confidence & Scenarios:

Aviation

21/12Z TAF Period

VFR conditions will prevail at all terminals during this TAF Period with primarily light winds and high-level clouds around. At the KWYS terminal between 21/15Z and 21/22Z there is a 15 - 30% chance for rain showers. -IG

Preliminary Point Temps

GTF 73 45 74 42 / 0 0 0 30 CTB 68 39 70 38 / 0 0 0 60 HLN 69 39 71 43 / 10 10 0 40 BZN 67 38 70 40 / 10 0 0 30 WYS 60 29 62 32 / 30 10 10 70 DLN 65 38 66 41 / 20 10 0 80 HVR 69 37 73 40 / 0 0 0 20 LWT 71 45 75 43 / 0 0 0 20

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.