National Weather Service Forecast for: Helena MT
Issued by: National Weather Service Great Falls, MT
Updated: 12:32 am MDT Jun 22, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 51. West northwest wind around 8 mph.
Partly Cloudy

 Monday

Monday: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 69. West northwest wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunny then
Chance
T-storms
 Monday
Night
Monday Night: A 20 percent chance of showers before 8pm. Mostly clear, with a low around 43. North wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Slight Chance
Showers then
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 73. Light and variable wind becoming north 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 50. North wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 22 mph.
Mostly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 79. Calm wind becoming north northeast around 6 mph in the afternoon.
Mostly Sunny

 Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 52. Northeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 20%.
Slight Chance
T-storms then
Partly Cloudy
 Thursday

Thursday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.
Partly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 54.
Mostly Cloudy
Lo 51 °F Hi 69 °F Lo 43 °F Hi 73 °F Lo 50 °F Hi 79 °F Lo 52 °F Hi 82 °F Lo 54 °F

 

Overnight
 
 Partly cloudy, with a low around 51. West northwest wind around 8 mph.
Monday
 
 A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 69. West northwest wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Monday Night
 
 A 20 percent chance of showers before 8pm. Mostly clear, with a low around 43. North wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Tuesday
 
 Sunny, with a high near 73. Light and variable wind becoming north 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 50. North wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 22 mph.
Wednesday
 
 Mostly sunny, with a high near 79. Calm wind becoming north northeast around 6 mph in the afternoon.
Wednesday Night
 
 A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 52. Northeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 20%.
Thursday
 
 A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
 
 Mostly cloudy, with a low around 54.
Friday
 
 A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Saturday
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 67.
Saturday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Sunday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 61.

 

Forecast from NOAA-NWS for Helena MT.