National Weather Service Forecast for: Columbia Falls MT
Issued by: National Weather Service Missoula, MT
Updated: 2:00 pm MDT Jun 18, 2026
 
Tonight

Tonight: Mostly clear, with a low around 46. Northeast wind 5 to 9 mph.
Mostly Clear

 Juneteenth

Juneteenth: Increasing clouds, with a high near 77. Northeast wind around 5 mph becoming calm in the morning.
Increasing
Clouds
 Friday
Night
Friday Night: Cloudy, then gradually becoming partly cloudy, with a low around 50. Light and variable wind.
Decreasing
Clouds
 Saturday

Saturday: Sunny, with a high near 81. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 50. West southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Mostly Clear

 Sunday

Sunday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72.
Sunny then
Chance
Showers
 Sunday
Night
Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Slight Chance
T-storms then
Mostly Clear
 Monday

Monday: Sunny, with a high near 74.
Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 47.
Mostly Clear
Lo 46 °F Hi 77 °F Lo 50 °F Hi 81 °F Lo 50 °F Hi 72 °F Lo 45 °F Hi 74 °F Lo 47 °F

 

Tonight
 
 Mostly clear, with a low around 46. Northeast wind 5 to 9 mph.
Juneteenth
 
 Increasing clouds, with a high near 77. Northeast wind around 5 mph becoming calm in the morning.
Friday Night
 
 Cloudy, then gradually becoming partly cloudy, with a low around 50. Light and variable wind.
Saturday
 
 Sunny, with a high near 81. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
 
 Mostly clear, with a low around 50. West southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Sunday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72.
Sunday Night
 
 A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Monday
 
 Sunny, with a high near 74.
Monday Night
 
 Mostly clear, with a low around 47.
Tuesday
 
 Sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 52.
Wednesday
 
 Mostly sunny, with a high near 84.
Wednesday Night
 
 Partly cloudy, with a low around 54.
Thursday
 
 Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Columbia Falls MT.