National Weather Service Forecast for: Dillon MT
Issued by: National Weather Service Great Falls, MT
Updated: 12:31 am MDT Jun 30, 2026
 
Overnight

Overnight: A chance of showers before 4am, then a slight chance of showers after 5am.  Mostly cloudy, with a low around 40. South southwest wind 7 to 9 mph.  Chance of precipitation is 30%.
Chance
Showers
Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 3pm.  Mostly cloudy, then gradually becoming sunny, with a high near 68. Southwest wind 3 to 7 mph.
Mostly Sunny
then Chance
T-storms
Tuesday
Night
Tuesday Night: Showers and thunderstorms likely, mainly before 10pm.  Cloudy during the early evening, then gradual clearing, with a low around 42. South southwest wind 3 to 7 mph.  Chance of precipitation is 60%.
Showers
Likely then
Partly Cloudy
Wednesday

Wednesday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm.  Increasing clouds, with a high near 71. Light southwest wind becoming south southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 70%.
Sunny then
Showers
Likely
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 43. South wind 3 to 7 mph.  Chance of precipitation is 30%.
Chance
T-storms then
Mostly Clear
Thursday

Thursday: Sunny, with a high near 75. Light south southwest wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 23 mph.
Sunny

Thursday
Night
Thursday Night: Partly cloudy, with a low around 46. South wind 5 to 11 mph, with gusts as high as 21 mph.
Partly Cloudy

Friday

Friday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 75. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Mostly Sunny
then Chance
T-storms
Friday
Night
Friday Night: A slight chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 44.
Slight Chance
T-storms then
Mostly Clear
Lo 40 °F Hi 68 °F Lo 42 °F Hi 71 °F Lo 43 °F Hi 75 °F Lo 46 °F Hi 75 °F Lo 44 °F

 

Overnight
 
A chance of showers before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 40. South southwest wind 7 to 9 mph. Chance of precipitation is 30%.
Tuesday
 
A 50 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 68. Southwest wind 3 to 7 mph.
Tuesday Night
 
Showers and thunderstorms likely, mainly before 10pm. Cloudy during the early evening, then gradual clearing, with a low around 42. South southwest wind 3 to 7 mph. Chance of precipitation is 60%.
Wednesday
 
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 71. Light southwest wind becoming south southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Wednesday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 43. South wind 3 to 7 mph. Chance of precipitation is 30%.
Thursday
 
Sunny, with a high near 75. Light south southwest wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 23 mph.
Thursday Night
 
Partly cloudy, with a low around 46. South wind 5 to 11 mph, with gusts as high as 21 mph.
Friday
 
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Friday Night
 
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.
Independence Day
 
Sunny, with a high near 79.
Saturday Night
 
Clear, with a low around 48.
Sunday
 
Sunny, with a high near 84.
Sunday Night
 
Mostly clear, with a low around 52.
Monday
 
Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Dillon MT.