National Weather Service Forecast for: Helena MT
Issued by: National Weather Service Great Falls, MT
Updated: 12:41 pm MDT Jul 28, 2026
 
Tonight

Tonight: Areas of smoke. Mostly clear, with a low around 59. Northwest wind 5 to 7 mph becoming west southwest after midnight.
Areas Smoke

 Wednesday

Wednesday: Patchy smoke. Sunny, with a high near 92. Calm wind becoming north 5 to 7 mph in the afternoon.
Patchy Smoke

 Wednesday
Night
Wednesday Night: Patchy smoke. Partly cloudy, with a low around 59. West southwest wind 3 to 6 mph.
Patchy Smoke

 Thursday

Thursday: Patchy smoke before 7am. Sunny, with a high near 93. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Patchy Smoke
then Sunny

 Thursday
Night
Thursday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 59. Southwest wind 5 to 7 mph.
Partly Cloudy
then Slight
Chance
Showers
 Friday

Friday: Sunny and hot, with a high near 97. Calm wind becoming northwest around 6 mph in the afternoon.
Hot

 Friday
Night
Friday Night: Clear, with a low around 61. North northwest wind 5 to 7 mph becoming calm after midnight.
Clear

 Saturday

Saturday: Sunny and hot, with a high near 100. Light and variable wind becoming south southeast 10 to 15 mph in the afternoon. Winds could gust as high as 28 mph.
Hot

 Saturday
Night
Saturday Night: Mostly clear, with a low around 58.
Mostly Clear
Lo 59 °F Hi 92 °F Lo 59 °F Hi 93 °F Lo 59 °F Hi 97 °F Lo 61 °F Hi 100 °F Lo 58 °F

Air Quality Alert
 

Tonight
 
 Areas of smoke. Mostly clear, with a low around 59. Northwest wind 5 to 7 mph becoming west southwest after midnight.
Wednesday
 
 Patchy smoke. Sunny, with a high near 92. Calm wind becoming north 5 to 7 mph in the afternoon.
Wednesday Night
 
 Patchy smoke. Partly cloudy, with a low around 59. West southwest wind 3 to 6 mph.
Thursday
 
 Patchy smoke before 7am. Sunny, with a high near 93. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
 
 A 20 percent chance of showers after midnight. Partly cloudy, with a low around 59. Southwest wind 5 to 7 mph.
Friday
 
 Sunny and hot, with a high near 97. Calm wind becoming northwest around 6 mph in the afternoon.
Friday Night
 
 Clear, with a low around 61. North northwest wind 5 to 7 mph becoming calm after midnight.
Saturday
 
 Sunny and hot, with a high near 100. Light and variable wind becoming south southeast 10 to 15 mph in the afternoon. Winds could gust as high as 28 mph.
Saturday Night
 
 Mostly clear, with a low around 58.
Sunday
 
 Sunny, with a high near 86.
Sunday Night
 
 Clear, with a low around 49.
Monday
 
 Sunny, with a high near 79.
Monday Night
 
 Mostly clear, with a low around 48.
Tuesday
 
 Sunny, with a high near 85.

 

Forecast from NOAA-NWS for Helena MT.