Hamilton, MT Weather

Ravalli County2:04 AM MDT46.25°N, 114.16°WElevation 3,570 ft

Current conditions

Mostly Clear
34°
Mostly Clear
Feels like 34°
High 69°·Low 37° tonight
WindCalm
Humidity98%
Dew point33°
Cloud cover9%
UV index0 Low
Sunrise8:03 AM
Sunset6:41 PM

Observed at STEVI · 1 hr ago

Forecast

10-day

  • Overnight

    Mostly clear, with a low around 37. South southeast wind around 5 mph.

  • Wednesday

    Sunny, with a high near 69. South southeast wind 2 to 6 mph.

  • Wednesday Night

    Partly cloudy, with a low around 39. South wind 2 to 6 mph.

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 44°
  2. 3 AM Mostly Clear 42°
  3. 4 AM Mostly Clear 41°
  4. 5 AM Mostly Clear 39°
  5. 6 AM Sunny 39°
  6. 7 AM Sunny 38°
  7. 8 AM Mostly Sunny 37°
  8. 9 AM Mostly Sunny 39°
  9. 10 AM Sunny 45°
  10. 11 AM Sunny 50°
  11. 12 PM Sunny 56°
  12. 1 PM Sunny 60°
  13. 2 PM Sunny 65°
  14. 3 PM Sunny 67°
  15. 4 PM Mostly Sunny 67°
  16. 5 PM Mostly Sunny 68°
  17. 6 PM Partly Cloudy 65°
  18. 7 PM Partly Cloudy 61°
  19. 8 PM Mostly Clear 57°
  20. 9 PM Partly Cloudy 51°
  21. 10 PM Partly Cloudy 50°
  22. 11 PM Partly Cloudy 48°
  23. Thu12 AM Partly Cloudy 48°
  24. 1 AM Partly Cloudy 46°

10-day forecast

Details
  1. TonightOct 20 Mostly Clear Mostly Clear37°
  2. TodayOct 21 Sunny Sunny39°69°
  3. ThuOct 22 Mostly Sunny then Slight Chance Showers And Thunderstorms Mostly Sunny then Slight Chance Showers And Thunderstorms94%40°68°
  4. FriOct 23 Light Rain Light Rain93%29°48°
  5. SatOct 24 Mostly Sunny Mostly Sunny29°52°
  6. SunOct 25 Mostly Sunny Mostly Sunny10%28°54°
  7. MonOct 26 Slight Chance Light Snow Slight Chance Light Snow22%28°53°
  8. TueOct 27 Slight Chance Rain And Snow then Mostly Sunny Slight Chance Rain And Snow then Mostly Sunny23%53°
  9. WedOct 28 Partly cloudy Partly cloudy40°58°
  10. ThuOct 29 Cloudy Cloudy42°58°

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 in Montana

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Air quality

49
Good
Fine particles (PM2.5)

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

Hamilton, 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 8:03 AM
Sunset 6:41 PM
Daylight 10 h 38 min (−3 min 7 s tomorrow)
Waxing Gibbous · 75% lit
Moonrise 4:38 PM Moonset 2:52 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Record high70° (2003)
Record low3° (1984)
Wettest1.00 in (1985)
Month to date0.70 in (normal 2.99 in)

Twin Lakes, records since 1983. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in MSO, issued 14 hrs ago

Discussion

KEY MESSAGES:

- Mild daytime temperatures through Thursday.

- Patchy valley fog around sunrise each morning.

- Significant weather change coming Friday into the weekend.

A broad ridge of high pressure will continue to bring mild daytime temperatures across the Northern Rockies through Thursday. Stable conditions under the ridge are promoting the development of daily valley inversions and trapped cold air, with patchy dense fog. Afternoon temperatures will continue to run 10 to 15 degrees above normal for this time of year. Forecast models suggest a few isolated showers developing over Lemhi County this afternoon, then over southwest and west-central Montana tomorrow afternoon and evening.

Expect a significant change as a low pressure system and cold front track across the region Thursday night into Friday. The front will bring wind gusts around 20 mph in Idaho and 20 to 35 mph across most of western Montana on Friday. Moisture with this system will move north from the Great Basin, with precipitation focusing along and south of the I-90 corridor and along the Continental Divide in northwest Montana. Most of the precipitation will fall as rain ahead of the cold front, limiting the potential for winter weather impacts. Snow levels will fall to around 5,000 feet Friday and lower over the weekend as shower activity begins to decrease. Therefore, forecast snow amounts will be generally under an inch across the region and above 5,000 feet. The exception is the higher elevations of the Flathead National Forest and Glacier National Park, which will likely pick up several inches of snow this weekend.

Aviation

Stable conditions will continue today under a ridge of high pressure. Valley inversions and cold air pools will set the stage for areas of valley fog, particularly near large bodies of water and river systems. The primary period to watch will be from 21/1200-1500Z, including Terminal KMSO. Fog can not be ruled out at KGPI as well, but the probability of impacts is less than 10 percent as high cloud cover has reduced overnight cooling.

Mso Watches

MT...None. ID...None.

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.