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Libby, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Libby MT
National Weather Service Forecast for: Libby MT
Issued by: National Weather Service Missoula, MT
Updated: 3:30 am MDT Jul 26, 2025
 
Overnight

Overnight: Mostly clear, with a low around 53. Calm wind.
Mostly Clear
Saturday

Saturday: Sunny, with a high near 88. Calm wind becoming west southwest 5 to 9 mph in the afternoon.
Sunny
Saturday
Night
Saturday Night: Mostly clear, with a low around 52. West wind around 5 mph becoming calm  in the evening.
Mostly Clear
Sunday

Sunday: Sunny, with a high near 90. Calm wind.
Sunny
Sunday
Night
Sunday Night: Partly cloudy, with a low around 53. Calm wind.
Partly Cloudy
Monday

Monday: Sunny, with a high near 92.
Sunny
Monday
Night
Monday Night: Mostly clear, with a low around 55.
Mostly Clear
Tuesday

Tuesday: Sunny, with a high near 94.
Sunny
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 57.
Partly Cloudy
Lo 53 °F Hi 88 °F Lo 52 °F Hi 90 °F Lo 53 °F Hi 92 °F Lo 55 °F Hi 94 °F Lo 57 °F

 

Overnight
 
Mostly clear, with a low around 53. Calm wind.
Saturday
 
Sunny, with a high near 88. Calm wind becoming west southwest 5 to 9 mph in the afternoon.
Saturday Night
 
Mostly clear, with a low around 52. West wind around 5 mph becoming calm in the evening.
Sunday
 
Sunny, with a high near 90. Calm wind.
Sunday Night
 
Partly cloudy, with a low around 53. Calm wind.
Monday
 
Sunny, with a high near 92.
Monday Night
 
Mostly clear, with a low around 55.
Tuesday
 
Sunny, with a high near 94.
Tuesday Night
 
Partly cloudy, with a low around 57.
Wednesday
 
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 93.
Wednesday Night
 
A slight chance of rain and thunderstorms. Partly cloudy, with a low around 58.
Thursday
 
A slight chance of showers and thunderstorms. Patchy fog. Otherwise, mostly sunny, with a high near 93.
Thursday Night
 
A chance of rain and thunderstorms. Patchy fog. Otherwise, mostly cloudy, with a low around 57.
Friday
 
A chance of showers and thunderstorms. Patchy fog. Otherwise, partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Libby MT.

Weather Forecast Discussion
277
FXUS65 KMSO 260813
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
213 AM MDT Sat Jul 26 2025

.DISCUSSION...

KEY MESSAGES:

-  KMSO Radar or the local Missoula MT weather radar will
   continue to be offline due to scheduled maintenance,
   Potentially through 1st week of August.

-  Thunderstorm chances will gradually increase each day, moving
   from south to north, continuing into next week.

-  Strong outflow wind threat (40+ mph) with any thunderstorms
   this afternoon through Monday.

Warm and mostly dry conditions, with breezy afternoons are
expected in the near term. This summer the notorious 4-corners
high has just not been able to get its act together and a near
unanimous suite of global weather models would suggest through at
least the beginning of August that pattern continues. It will
feel very warm this coming week but on average, this is the
warmest week of the year. For instance, 30 July is the
climatologically warmest day for Missoula with an average high
temperature of 88F and our current forecast high is 88F.

While today (and this entire week) our temperature may be
pleasant, there is a chance for a strong thunderstorm south and
east of Missoula Valley. Winds today could gust 20 to 25 mph under
clear skies, any storm will be capable of outflow gusts 40 to 50
mph, especially Lemhi County through southwest MT. Timing on these
storms will generally be after 1 pm through 6 pm.

Sunday and Monday, our weather playlists remains on repeat and
similar conditions are expected. Sunday potential for strong
outflow winds moves north into the northern Bitterroot and
Missoula Valleys, along with I-90 east of Missoula including the
Seeley Valley. These storms may also have brief but heavy
downpours.

Tuesday may bring a change in the coverage and convective mode.
Anomalous moisture will be pushed westward across the Continental
Divide, allowing for expanded coverage of storms and more
numerous storms producing heavy showers. Currently, the WPC or
Weather Prediction Center has a marginal or 5% chance of excessive
rainfall from the Missoula and Bitterroot Valleys east towards
the Divide. This forecaster would not be surprised if future
forecasts expands that area and is continued into Wednesday as
well. In fact, anomalous moisture remains over the region through
the following Saturday allowing for continued shower and
thunderstorm activity.



&&

.AVIATION...VFR conditions will prevail again today under southwesterly flow
aloft. Expect typical afternoon gusts in the 15-20 kt range due
to daytime mixing.

Between 26/1900 and 27/0000z, scattered showers and thunderstorms
will develop across Lemhi County and southwest Montana, including
terminals KSMN and KBTM. Seasonally warm temperatures and
elevated cloud bases will favor strong convective downdrafts, with
isolated outflow wind gusts exceeding 35 kts possible (20%
chance) in association with the more robust storms.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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