National Weather Service Forecast for: 5 Miles NNW Helena MT
Issued by: National Weather Service Great Falls, MT
Updated: 12:31 am MDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a low around 52. Light west southwest wind.
Mostly Clear

 Thursday

Thursday: Patchy smoke between 1pm and 2pm. Sunny, with a high near 90. Calm wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Sunny then
Patchy Smoke
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 55. West northwest wind 5 to 9 mph.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 89. West northwest wind 5 to 7 mph becoming calm.
Mostly Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 57. North northwest wind 5 to 7 mph becoming calm after midnight.
Mostly Cloudy

 Saturday

Saturday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 87. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 30%.
Partly Sunny
then Chance
Showers
 Saturday
Night
Saturday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 55. West wind 5 to 7 mph becoming south in the evening. Chance of precipitation is 20%.
Slight Chance
T-storms then
Partly Cloudy
 Sunday

Sunday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83. Light south southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 26 mph.
Mostly Sunny
then Chance
Showers
 Sunday
Night
Sunday Night: Mostly clear, with a low around 51.
Mostly Clear
Lo 52 °F Hi 90 °F Lo 55 °F Hi 89 °F Lo 57 °F Hi 87 °F Lo 55 °F Hi 83 °F Lo 51 °F

 

Overnight
 
 Mostly clear, with a low around 52. Light west southwest wind.
Thursday
 
 Patchy smoke between 1pm and 2pm. Sunny, with a high near 90. Calm wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
 
 Partly cloudy, with a low around 55. West northwest wind 5 to 9 mph.
Friday
 
 Mostly sunny, with a high near 89. West northwest wind 5 to 7 mph becoming calm.
Friday Night
 
 Mostly cloudy, with a low around 57. North northwest wind 5 to 7 mph becoming calm after midnight.
Saturday
 
 A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 87. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
 
 A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 55. West wind 5 to 7 mph becoming south in the evening. Chance of precipitation is 20%.
Sunday
 
 A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83. Light south southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
 
 Mostly clear, with a low around 51.
Monday
 
 Sunny, with a high near 81.
Monday Night
 
 Partly cloudy, with a low around 52.
Tuesday
 
 Sunny, with a high near 83.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Wednesday
 
 Sunny, with a high near 82.

 

Forecast from NOAA-NWS for 5 Miles NNW Helena MT.