National Weather Service Forecast for: Hamilton MT
Issued by: National Weather Service Missoula, MT
Updated: 12:27 am MDT Aug 20, 2026
 
Overnight

Overnight: Patchy smoke after 3am. Mostly clear, with a low around 50. South southeast wind around 6 mph.
Patchy Smoke

 Thursday

Thursday: Patchy smoke before 7am. Sunny, with a high near 92. South southeast wind around 6 mph becoming light and variable.
Patchy Smoke
then Sunny

 Thursday
Night
Thursday Night: Patchy smoke after 2am. Partly cloudy, with a low around 55. North northeast wind around 5 mph becoming light and variable in the evening.
Partly Cloudy
then Patchy
Smoke
 Friday

Friday: Patchy smoke before 7am. Partly sunny, with a high near 93. Calm wind becoming north around 6 mph in the afternoon.
Patchy Smoke
then Partly
Sunny
 Friday
Night
Friday Night: Mostly cloudy, with a low around 58. North wind around 5 mph becoming light and variable after midnight.
Mostly Cloudy

 Saturday

Saturday: A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Slight Chance
Rain then
Chance
Showers
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of rain between 9pm and midnight. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Chance
Showers then
Partly Cloudy
 Sunday

Sunday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Mostly Sunny
then Slight
Chance
T-storms
 Sunday
Night
Sunday Night: Mostly clear, with a low around 46.
Mostly Clear
Lo 50 °F Hi 92 °F Lo 55 °F Hi 93 °F Lo 58 °F Hi 88 °F Lo 53 °F Hi 82 °F Lo 46 °F

 

Overnight
 
 Patchy smoke after 3am. Mostly clear, with a low around 50. South southeast wind around 6 mph.
Thursday
 
 Patchy smoke before 7am. Sunny, with a high near 92. South southeast wind around 6 mph becoming light and variable.
Thursday Night
 
 Patchy smoke after 2am. Partly cloudy, with a low around 55. North northeast wind around 5 mph becoming light and variable in the evening.
Friday
 
 Patchy smoke before 7am. Partly sunny, with a high near 93. Calm wind becoming north around 6 mph in the afternoon.
Friday Night
 
 Mostly cloudy, with a low around 58. North wind around 5 mph becoming light and variable after midnight.
Saturday
 
 A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Saturday Night
 
 A chance of showers and thunderstorms before 9pm, then a chance of rain between 9pm and midnight. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Sunday
 
 A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Sunday Night
 
 Mostly clear, with a low around 46.
Monday
 
 Sunny, with a high near 83.
Monday Night
 
 Partly cloudy, with a low around 50.
Tuesday
 
 Sunny, with a high near 85.
Tuesday Night
 
 Partly cloudy, with a low around 50.
Wednesday
 
 Sunny, with a high near 84.

 

Forecast from NOAA-NWS for Hamilton MT.