Polson, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Polson MT
National Weather Service Forecast for:
Polson MT
Issued by: National Weather Service Missoula, MT |
Updated: 2:30 pm MDT Jun 26, 2025 |
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This Afternoon
 Slight Chance T-storms
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Tonight
 Mostly Cloudy then Chance Rain
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Friday
 Slight Chance Rain
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Friday Night
 Mostly Clear
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Saturday
 Mostly Sunny
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Saturday Night
 Mostly Clear
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Sunday
 Sunny
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Sunday Night
 Clear
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Monday
 Sunny
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Hi 79 °F |
Lo 54 °F |
Hi 77 °F |
Lo 51 °F |
Hi 77 °F |
Lo 50 °F |
Hi 83 °F |
Lo 52 °F |
Hi 89 °F |
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This Afternoon
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A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. West southwest wind around 9 mph, with gusts as high as 20 mph. |
Tonight
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A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. West wind 5 to 9 mph becoming light and variable. Winds could gust as high as 20 mph. |
Friday
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A 20 percent chance of rain. Mostly sunny, with a high near 77. South wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 29 mph. |
Friday Night
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Mostly clear, with a low around 51. West wind 6 to 14 mph becoming south after midnight. Winds could gust as high as 28 mph. |
Saturday
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Mostly sunny, with a high near 77. South wind 6 to 11 mph, with gusts as high as 23 mph. |
Saturday Night
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Mostly clear, with a low around 50. |
Sunday
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Sunny, with a high near 83. |
Sunday Night
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Clear, with a low around 52. |
Monday
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Sunny, with a high near 89. |
Monday Night
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Mostly clear, with a low around 57. |
Tuesday
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Mostly sunny, with a high near 91. |
Tuesday Night
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A slight chance of rain. Partly cloudy, with a low around 58. |
Wednesday
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A chance of rain. Mostly sunny, with a high near 90. |
Wednesday Night
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Partly cloudy, with a low around 57. |
Thursday
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A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. |
Forecast from NOAA-NWS
for Polson MT.
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Weather Forecast Discussion
170
FXUS65 KMSO 261812
AFDMSO
Area Forecast Discussion
National Weather Service Missoula MT
1212 PM MDT Thu Jun 26 2025
.DISCUSSION...
KEY MESSAGES:
- Scattered showers/isolated thunderstorms today, gusty outflow
wind potential.
- Isolated/scattered thunderstorm pattern Thursday through
Saturday.
- Warm up expected to start next week, temperatures 10 to 15
degrees above normal.
- Chances for showers and thunderstorms increases after 2 July.
Showers and thunderstorms are possible today as a weak wave
transits the Northern Rockies today. Missoula and northward clouds
may inhibit convection slightly with results similar to yesterday
virga, sprinkles, and brief showers with large rain drops.
Elsewhere, any showers or thunderstorms will be capable of gusty
outflow winds and brief but heavy showers.
Friday similar conditions will have a similar result, albeit in
much smaller area, likely southern Bitterroot, Anaconda Range,
Lemhi County ID, and southwest MT.
High pressure builds over the region Sunday and Monday onward
expect temperatures 10 to 15 degrees above normal.
The models have been very consistent trying to pinch off energy,
from the overall flow, over northern California on the 2nd. If
this scenario happens southwesterly flow will advect or move a
unstable air mass into the Northern Rockies. While details are
limited, typical scenarios like this produce cloud storms/ virga
on day one, with increasing chances and expanding coverage of
thunderstorms each subsequent afternoon.
&&
.AVIATION... A moist air mass over the region with southwest flow
aloft means we`ll have another round of afternoon showers and
thunderstorms. Terminal KBTM is the most likely to be effected by
afternoon and evening thunderstorms. Terminals KMSO, KHRF, and
KSMN are in the area where we expect convection to initiate, so
storms are not expected to be mature in those areas but the
convection will be noticeable. Convection in the region should die
down by 27/02Z or 27/03Z.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&
$$
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