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Butte-Silver Bow, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for 9 Miles SW Butte MT
National Weather Service Forecast for:
9 Miles SW Butte MT
Issued by: National Weather Service Missoula, MT |
| Updated: 1:01 pm MST Dec 22, 2025 |
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Tonight
 Partly Cloudy then Slight Chance Snow
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Tuesday
 Chance Rain/Snow then Slight Chance Rain
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Tuesday Night
 Mostly Cloudy
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Wednesday
 Partly Sunny
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Wednesday Night
 Rain Likely then Rain/Snow Likely
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Christmas Day
 Slight Chance Rain/Snow then Partly Sunny
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Thursday Night
 Slight Chance Snow
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Friday
 Slight Chance Snow
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Friday Night
 Slight Chance Snow then Mostly Cloudy
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| Lo 27 °F |
Hi 43 °F |
Lo 31 °F |
Hi 44 °F |
Lo 33 °F |
Hi 42 °F |
Lo 27 °F |
Hi 37 °F |
Lo 18 °F |
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Tonight
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A 10 percent chance of snow after 5am. Mostly cloudy, with a low around 27. South southeast wind 7 to 10 mph. |
Tuesday
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A chance of snow before 11am, then a slight chance of rain between 11am and 2pm. Snow level rising to 7300 feet in the afternoon. Mostly cloudy, with a high near 43. South wind 7 to 10 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible. |
Tuesday Night
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Mostly cloudy, with a low around 31. South wind around 10 mph. |
Wednesday
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Partly sunny, with a high near 44. South wind 11 to 16 mph, with gusts as high as 25 mph. |
Wednesday Night
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Rain likely before 2am, then rain likely, possibly mixed with snow. Cloudy, with a low around 33. South southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. Little or no snow accumulation expected. |
Christmas Day
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A slight chance of rain and snow before 11am. Snow level 6300 feet. Mostly cloudy, with a high near 42. Chance of precipitation is 20%. |
Thursday Night
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A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 27. |
Friday
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A slight chance of snow. Mostly sunny, with a high near 37. |
Friday Night
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A slight chance of snow before 11pm. Mostly cloudy, with a low around 18. |
Saturday
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Partly sunny, with a high near 30. |
Saturday Night
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Partly cloudy, with a low around 15. |
Sunday
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Partly sunny, with a high near 35. |
Sunday Night
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Mostly cloudy, with a low around 21. |
Monday
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Partly sunny, with a high near 40. |
Forecast from NOAA-NWS
for 9 Miles SW Butte MT.
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Weather Forecast Discussion
625
FXUS65 KMSO 222137
AFDMSO
Area Forecast Discussion
National Weather Service Missoula MT
237 PM MST Mon Dec 22 2025
.DISCUSSION...
KEY MESSAGES:
- Unsettled Holiday Week: A series of disturbances will keep the region
wet and unsettled through Christmas. A stronger cold front on
Friday will likely transition all valley precipitation back to
snow.
- New Year`s Eve Outlook: A potential atmospheric river could
bring milder, wetter, and windier conditions to end the year.
A complex weather pattern continues across the Northern Rockies as moist
Pacific air overrides stubborn cold air trapped in the valleys.
This setup will create a variety of precipitation types and travel
hazards through the early part of the week, followed by a series
of storms leading into the Christmas holiday.
Tonight through Tuesday: Valleys across Lemhi County, north central Idaho,
and southwest Montana are expected to cool to just below freezing tonight.
As the next wave of precipitation advances from south to north Tuesday
morning, thermal profiles support a wintry mix of snow and freezing rain.
This will likely create slick travel conditions for lower elevations,
including the Salmon area. Winter Weather Advisories have been issued for
these locations to address potential travel impacts. By Tuesday evening,
the pulse of moisture arrives into northwest Montana, bringing light snow
to mountain passes and maintaining a wintry mix for the valleys.
Temperatures remain marginal. The difference between wet and icy
road surfaces will be narrow.
Wednesday through Sunday: The pattern remains highly active through the
Christmas holiday. An amplified trough along the west coast will eject
several shortwaves into the region. For Christmas Eve/Day, the
focus remains on a potential Arctic boundary spilling over the
Continental Divide. If this "wedge" of Arctic air materializes,
areas near Marias Pass and Essex could experience a sharp drop in
temperatures and an increase in snowfall rates. In addition,
forecast models are showing another slug of moisture which could
bring impacts the higher elevations of Lemhi County during the day
Wednesday. For the remainder of western Montana and north central
Idaho, expect periodic rain and snow showers to persist through
the holiday.
On Friday, a robust cold front is forecast to sweep through the region.
This will provide a more defined transition to snow for valley
floors as snow levels lower significantly behind the front. Breezy
conditions will develop, though there is still some model
difference in how strong the winds will be. Current model guidance
shows a 30 to 50 percent chance of winds exceeding 40 mph in the
valleys of western Montana, with stronger speeds possible in the
terrain.
Next Weekend: Conditions trend cooler with persistent mountain snow
showers. While organized, heavy precipitation may briefly diminish,
ensemble guidance suggests a potential Atmospheric River event may target
the region toward New Year`s Eve.
&&
.AVIATION...VFR conditions are expected this afternoon as the
region is generally in a lull in organized precipitation. Patchy
fog and/or low clouds may develop at a few of the terminals this
evening before the next system arrives late tonight. Snow and
freezing rain will be possible across Lemhi County after 0800Z
(0100 MST Tuesday). Mountain obscuration and lower visibility is
expected through the morning hours. This area of precipitation
will shift northwards during the day Tuesday and generally be
over northwest Montana by evening.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Weather Advisory from 5 AM to noon MST Tuesday for
Bitterroot/Sapphire Mountains.
ID...Winter Weather Advisory from 4 AM to 11 AM PST Tuesday for
Southern Clearwater Mountains.
Winter Weather Advisory from 3 AM to noon MST Tuesday for
Eastern Lemhi County...Western Lemhi County.
&&
$$
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