Great Falls, MT Weather

Cascade County5:56 AM MDT47.50°N, 111.30°WElevation 3,330 ft

Current conditions

Clear
36°
Clear
Feels like 30°
High 74°·Low 32° tonight
WindSSW 7 mph
Humidity93%
Dew point34°
Visibility10 mi
Cloud cover16%
UV index0 Low
Sunrise7:53 AM
Sunset6:28 PM

Observed at Great Falls, Great Falls International Airport · 1 hr ago

Forecast

10-day

  • Overnight

    Mostly clear. Low around 32, with temperatures rising to around 35 overnight. South southwest wind around 2 mph.

  • Wednesday

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

  • Wednesday Night

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

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 35°
  2. 6 AM Mostly Sunny 35°
  3. 7 AM Sunny 33°
  4. 8 AM Mostly Sunny 35°
  5. 9 AM Sunny 38°
  6. 10 AM Sunny 47°
  7. 11 AM Sunny 54°
  8. 12 PM Sunny 59°
  9. 1 PM Sunny 65°
  10. 2 PM Sunny 69°
  11. 3 PM Sunny 72°
  12. 4 PM Sunny 73°
  13. 5 PM Sunny 71°
  14. 6 PM Clear 68°
  15. 7 PM Mostly Clear 65°
  16. 8 PM Mostly Clear 59°
  17. 9 PM Mostly Clear 57°
  18. 10 PM Mostly Clear 56°
  19. 11 PM Mostly Clear 54°
  20. Thu12 AM Mostly Clear 53°
  21. 1 AM Mostly Clear 52°
  22. 2 AM Partly Cloudy 51°
  23. 3 AM Partly Cloudy 50°
  24. 4 AM Mostly Clear 50°

10-day forecast

Details
  1. TonightOct 20 Mostly Clear Mostly Clear32°
  2. TodayOct 21 Sunny Sunny45°74°
  3. ThuOct 22 Sunny Sunny28%44°75°
  4. FriOct 23 Rain Rain98%32°52°
  5. SatOct 24 Mostly Sunny Mostly Sunny11%30°48°
  6. SunOct 25 Chance Light Snow Chance Light Snow27%28°43°
  7. MonOct 26 Partly Sunny Partly Sunny15%30°45°
  8. TueOct 27 Slight Chance Rain And Snow Slight Chance Rain And Snow19%48°
  9. WedOct 28 Partly cloudy Partly cloudy30°57°
  10. 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

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Weather news near Great Falls

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Air quality

28
Good
Fine particles (PM2.5)

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

Great Falls, MT reporting area · 56 min 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 4:28 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 4 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

- 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:

Today across Southwestern Montana along the Idaho/Montana Border there is a 10% chance for a tenth of rain or greater. On Friday there is a 40 - 65% chance for wind gusts of 45 mph or greater across much of North-central Montana. On Friday along the Rocky Mountain Front and plains west of I-15 there is a 30 - 50% chance for wind gusts of 55 mph or greater.

Aviation

21/06Z TAF Period

VFR conditions prevail through the TAF period. Surface winds will remain fairly light, increasing into the afternoon hours area wide. Few to scattered mid-level clouds will be prevalent through the TAF period. Across Southwest Montana, a few cumulus during the peak heating hours are possible which may bring slightly lower cloud bases. -JR

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 4Conservative index and reflects what the press published. Terms of use.