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Hamilton, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Hamilton MT
National Weather Service Forecast for: Hamilton MT
Issued by: National Weather Service Missoula, MT
Updated: 3:30 am MDT Jun 6, 2025
 
Today

Today: Increasing clouds, with a high near 78. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Increasing
Clouds
Tonight

Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 49. West wind 5 to 9 mph becoming south southeast in the evening. Winds could gust as high as 20 mph.
Decreasing
Clouds
Saturday

Saturday: Mostly sunny, with a high near 83. South wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 21 mph.
Mostly Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 51. West northwest wind 6 to 11 mph becoming light and variable  after midnight. Winds could gust as high as 22 mph.
Mostly Clear

Sunday

Sunday: Sunny, with a high near 86. Calm wind becoming north 5 to 7 mph in the afternoon.
Sunny

Sunday
Night
Sunday Night: Clear, with a low around 52.
Clear

Monday

Monday: Sunny, with a high near 92.
Sunny

Monday
Night
Monday Night: Mostly clear, with a low around 57.
Mostly Clear

Tuesday

Tuesday: A slight chance of showers and thunderstorms after noon.  Sunny, with a high near 91.
Sunny then
Slight Chance
T-storms
Hi 78 °F Lo 49 °F Hi 83 °F Lo 51 °F Hi 86 °F Lo 52 °F Hi 92 °F Lo 57 °F Hi 91 °F

 

Today
 
Increasing clouds, with a high near 78. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
 
Mostly cloudy, then gradually becoming mostly clear, with a low around 49. West wind 5 to 9 mph becoming south southeast in the evening. Winds could gust as high as 20 mph.
Saturday
 
Mostly sunny, with a high near 83. South wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
 
Mostly clear, with a low around 51. West northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Sunday
 
Sunny, with a high near 86. Calm wind becoming north 5 to 7 mph in the afternoon.
Sunday Night
 
Clear, with a low around 52.
Monday
 
Sunny, with a high near 92.
Monday Night
 
Mostly clear, with a low around 57.
Tuesday
 
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 91.
Tuesday Night
 
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 56.
Wednesday
 
A chance of rain and thunderstorms. Partly sunny, with a high near 81.
Wednesday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Thursday
 
A chance of rain and thunderstorms. Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Hamilton MT.

Weather Forecast Discussion
553
FXUS65 KMSO 060810
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
210 AM MDT Fri Jun 6 2025

DISCUSSION...

KEY MESSAGES:

-  Warming and drying trend through early next week.

High pressure will strengthen and build into early next week,
bringing a significant warm up and generally dry conditions.
Monday looks like the hottest day this week with many valleys
reaching into the low 90s and nearing 100 for the lower valleys of
north central Idaho. Isolated thunderstorms will be possible
across Lemhi County and southwest Montana by Monday and Tuesday
afternoons.

Ensemble forecast models are trying to show a pattern change mid
to late next week. With a trough digging over the west coast,
forcing the subtropical high (four-corners high) west into the
Pacific. The question becomes what is the moisture source as this
pattern would favor wide-scale subsidence over the eastern
Pacific. More to come as this forecast evolves.


&&

.AVIATION...A weak wave will allow for breezy west to northwest
winds late afternoon into the evening today. An isolated shower or
thunderstorm is possible in northwest MT as well, due to the low
probability no showers are currently mentioned in KGPI`s Terminal
Area Forecast. High pressure will build on Saturday producing VFR
conditions.

&&

.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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