National Weather Service Forecast for: Hamilton MT
Issued by: National Weather Service Missoula, MT
Updated: 2:01 am MDT Jun 22, 2026
 
Overnight

Overnight: Mostly clear, with a low around 48. Calm wind.
Mostly Clear
 Monday

Monday: Sunny, with a high near 79. Calm wind becoming north northwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 46. North wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 24 mph.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 81. Calm wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 51. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Partly Cloudy
 Wednesday

Wednesday: Sunny, with a high near 84.
Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 52.
Partly Cloudy
 Thursday

Thursday: Mostly sunny, with a high near 84.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 55.
Mostly Cloudy
Lo 48 °F Hi 79 °F Lo 46 °F Hi 81 °F Lo 51 °F Hi 84 °F Lo 52 °F Hi 84 °F Lo 55 °F

 

Overnight
 
 Mostly clear, with a low around 48. Calm wind.
Monday
 
 Sunny, with a high near 79. Calm wind becoming north northwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.
Monday Night
 
 Mostly clear, with a low around 46. North wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 24 mph.
Tuesday
 
 Sunny, with a high near 81. Calm wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
 
 Partly cloudy, with a low around 51. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Wednesday
 
 Sunny, with a high near 84.
Wednesday Night
 
 Partly cloudy, with a low around 52.
Thursday
 
 Mostly sunny, with a high near 84.
Thursday Night
 
 Mostly cloudy, with a low around 55.
Friday
 
 A chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 76.
Friday Night
 
 Rain and thunderstorms. Mostly cloudy, with a low around 48.
Saturday
 
 Rain and possibly a thunderstorm. Mostly cloudy, with a high near 63.
Saturday Night
 
 A chance of rain and thunderstorms. Mostly cloudy, with a low around 41.
Sunday
 
 A chance of rain and thunderstorms. Mostly cloudy, with a high near 59.

 

Forecast from NOAA-NWS for Hamilton MT.