Three Forks, MT Weather

Gallatin County3:09 AM MDT45.89°N, 111.55°WElevation 4,075 ft

Current conditions

Mostly Clear
41°
Mostly Clear
Feels like 41°
High 69°·Low 35° tonight
WindCalm
Humidity94%
Dew point39°
Visibility10 mi
Cloud cover9%
UV index0 Low
Sunrise7:53 AM
Sunset6:30 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Tonight

    Mostly clear. Low around 35, with temperatures rising to around 38 overnight. East wind around 1 mph.

  • Thursday

    Mostly sunny, with a high near 69. East northeast wind around 1 mph.

  • Thursday Night

    A chance of rain after midnight. Mostly cloudy, with a low around 39. South wind around 1 mph. Chance of precipitation is 40%.

National Weather Service forecast updated 17 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 41°
  2. 4 AM Mostly Clear 40°
  3. 5 AM Mostly Clear 38°
  4. 6 AM Partly Sunny 37°
  5. 7 AM Partly Sunny 37°
  6. 8 AM Partly Sunny 36°
  7. 9 AM Sunny 40°
  8. 10 AM Sunny 45°
  9. 11 AM Sunny 52°
  10. 12 PM Mostly Sunny 57°
  11. 1 PM Mostly Sunny 61°
  12. 2 PM Mostly Sunny 65°
  13. 3 PM Mostly Sunny 67°
  14. 4 PM Mostly Sunny 68°
  15. 5 PM Mostly Sunny 69°
  16. 6 PM Mostly Cloudy 66°14%
  17. 7 PM Mostly Cloudy 62°14%
  18. 8 PM Mostly Cloudy 58°14%
  19. 9 PM Mostly Cloudy 54°14%
  20. 10 PM Mostly Cloudy 52°14%
  21. 11 PM Mostly Cloudy 50°14%
  22. Fri12 AM Chance Light Rain 49°36%
  23. 1 AM Chance Light Rain 47°36%
  24. 2 AM Chance Light Rain 46°36%

10-day forecast

Details
  1. WedOct 21 Sunny Sunny35°67°
  2. TodayOct 22 Mostly Sunny Mostly Sunny36%39°69°
  3. FriOct 23 Rain Rain99%24°51°
  4. SatOct 24 Mostly Sunny Mostly Sunny22°46°
  5. SunOct 25 Mostly Sunny Mostly Sunny21°47°
  6. MonOct 26 Mostly Sunny Mostly Sunny11%22°48°
  7. TueOct 27 Slight Chance Rain And Snow Slight Chance Rain And Snow21%23°50°
  8. WedOct 28 Sleet showers Sleet showers0.13 in23°37°
  9. ThuOct 29 Partly cloudy Partly cloudy22°44°
  10. FriOct 30 Partly cloudy Partly cloudy26°49°

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

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Montana

More weather news

Sun & moon

Sunrise 7:53 AM
Sunset 6:30 PM
Daylight 10 h 36 min (−3 min 4 s tomorrow)
Waxing Gibbous · 84% lit
Moonrise 4:44 PM Moonset 3:50 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low54° / 27°
Month to date1.09 in (normal 0.77 in)

Bozeman Gallatin Field Ap, records since 1941. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in TFX, issued 15 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 501 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

21/18Z TAF Period

VFR conditions will continue at all terminals during this TAF period. Generally, cloud cover will be limited to a few high level clouds and winds will be mild. However, KWYS is expected to have a period of increased mid-level cloud cover between 0900-1600Z. -ESH

Preliminary Point Temps

GTF 45 74 42 50 / 0 0 30 100 CTB 39 70 38 46 / 0 0 60 90 HLN 39 71 43 51 / 10 0 40 100 BZN 38 70 40 51 / 0 0 30 100 WYS 29 62 32 46 / 10 10 70 100 DLN 38 66 41 48 / 10 0 80 100 HVR 37 73 40 55 / 0 0 20 100 LWT 45 75 43 52 / 0 0 20 100

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.