National Weather Service Forecast for: Helena MT
Issued by: National Weather Service Great Falls, MT
Updated: 1:52 am MDT Jun 30, 2026
 
Today

Today: A 40 percent chance of showers and thunderstorms, mainly after 3pm.  Partly sunny, with a high near 72. West southwest wind 3 to 6 mph.
Partly Sunny
then Chance
T-storms
Tonight

Tonight: A chance of showers and thunderstorms before 11pm, then showers likely between 11pm and midnight.  Mostly cloudy, with a low around 50. Southwest wind 3 to 5 mph.  Chance of precipitation is 60%.
Showers
Likely then
Mostly Cloudy
Wednesday

Wednesday: Showers and thunderstorms likely, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm.  Partly sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon.  Chance of precipitation is 70%.
Chance
Showers then
Showers
Likely
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Cloudy during the early evening, then gradual clearing, with a low around 49. South southwest wind 3 to 5 mph.  Chance of precipitation is 50%.
Chance
T-storms then
Partly Cloudy
Thursday

Thursday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 75. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Sunny then
Chance
T-storms
Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 51. Southwest wind 3 to 6 mph.  Chance of precipitation is 30%.
Chance
Showers then
Partly Cloudy
Friday

Friday: A 40 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 76. Calm wind becoming west around 6 mph in the afternoon.
Mostly Sunny
then Chance
T-storms
Friday
Night
Friday Night: Partly cloudy, with a low around 50. Southwest wind 3 to 6 mph.
Partly Cloudy

Independence
Day
Independence Day: Sunny, with a high near 80.
Sunny

Hi 72 °F Lo 50 °F Hi 72 °F Lo 49 °F Hi 75 °F Lo 51 °F Hi 76 °F Lo 50 °F Hi 80 °F

 

Today
 
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 72. West southwest wind 3 to 6 mph.
Tonight
 
A chance of showers and thunderstorms before 11pm, then showers likely between 11pm and midnight. Mostly cloudy, with a low around 50. Southwest wind 3 to 5 mph. Chance of precipitation is 60%.
Wednesday
 
Showers and thunderstorms likely, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 49. South southwest wind 3 to 5 mph. Chance of precipitation is 50%.
Thursday
 
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 51. Southwest wind 3 to 6 mph. Chance of precipitation is 30%.
Friday
 
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
 
Partly cloudy, with a low around 50. Southwest wind 3 to 6 mph.
Independence Day
 
Sunny, with a high near 80.
Saturday Night
 
Mostly clear, with a low around 53.
Sunday
 
Sunny, with a high near 85.
Sunday Night
 
Mostly clear, with a low around 57.
Monday
 
A slight chance of showers and thunderstorms. Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Helena MT.