National Weather Service Forecast for: Helena MT
Issued by: National Weather Service Great Falls, MT
Updated: 2:49 pm MDT Jul 4, 2025
 
Tonight

Tonight: Showers and thunderstorms before 3am, then a slight chance of showers.  Low around 51. North wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 80%.
T-storms then
Slight Chance
T-storms
Saturday

Saturday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 73. Light west southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 22 mph.  Chance of precipitation is 70%.
Chance
Showers then
Showers
Likely
Saturday
Night
Saturday Night: Mostly clear, with a low around 49. West northwest wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Mostly Clear

Sunday

Sunday: Sunny, with a high near 81. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 53. West northwest wind 5 to 8 mph becoming calm  after midnight.
Mostly Clear

Monday

Monday: Sunny, with a high near 86. Calm wind becoming north 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny

Monday
Night
Monday Night: Mostly clear, with a low around 56. Northwest wind 5 to 8 mph becoming light and variable  after midnight.
Mostly Clear

Tuesday

Tuesday: Sunny, with a high near 93. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Sunny

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 59.
Mostly Clear

Lo 51 °F Hi 73 °F Lo 49 °F Hi 81 °F Lo 53 °F Hi 86 °F Lo 56 °F Hi 93 °F Lo 59 °F

Special Weather Statement
 

Tonight
 
Showers and thunderstorms before 3am, then a slight chance of showers. Low around 51. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 80%.
Saturday
 
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 73. Light west southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Saturday Night
 
Mostly clear, with a low around 49. West northwest wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Sunday
 
Sunny, with a high near 81. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
 
Mostly clear, with a low around 53. West northwest wind 5 to 8 mph becoming calm after midnight.
Monday
 
Sunny, with a high near 86. Calm wind becoming north 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
 
Mostly clear, with a low around 56. Northwest wind 5 to 8 mph becoming light and variable after midnight.
Tuesday
 
Sunny, with a high near 93. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
 
Mostly clear, with a low around 59.
Wednesday
 
Sunny, with a high near 92.
Wednesday Night
 
Partly cloudy, with a low around 59.
Thursday
 
Sunny, with a high near 85.
Thursday Night
 
Mostly clear, with a low around 55.
Friday
 
Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Helena MT.