Portal, Montana Weather
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Weather Forecast for Portal, Montana : Jefferson County
Issued: 3:10 am MDT Jul 16, 2025 Latitude: 46.3374295 Longitude: -112.1183343 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Cloudy on Overnight Morning Fog on Wednesday Sunny on Thursday Sunny on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday 20% chance of rain on Tuesday
Low: 42°F High: 70°F High: 82°F High: 82°F High: 84°F High: 80°F High: 78°F High: 74°F
Low: 45°F Low: 49°F Low: 51°F Low: 51°F Low: 50°F Low: 49°F  
Cloudy Morning Fog Sunny Sunny Mostly Sunny Mostly Sunny Mostly Sunny Rain
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Current Conditions at
HELENA - (KHLN)
54°
Cloudy
as of 2:53 AM MDST
Rel. Humidity: 76%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
7 MPH
270° West
Cloud Level(s): Solid Overcast at 3400ft
Current Conditions at
BUTTE - (KBTM)
48°
Cloudy
as of 3:12 AM MDST
Rel. Humidity: 93%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Few at 600ft, Solid Overcast at 1000ft
Current Conditions at
BOZEMAN - (KBZN)
52°
Cloudy
as of 2:56 AM MDST
Rel. Humidity: 93%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: MVFR
Wind Data
6 MPH
240° Southwest
Cloud Level(s): Few at 1700ft, Broken at 2300ft, Solid Overcast at 2900ft
Current Conditions at
DILLON - (KDLN)
52°
Cloudy
as of 2:53 AM MDST
Rel. Humidity: 81%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
14 MPH
060° Northeast
Cloud Level(s): Solid Overcast at 3600ft
Cloudy on Overnight Overnight... Cloudy, with a low around 42. North wind around 7 mph.
Morning Fog on Wednesday Wednesday... Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 70. North wind 5 to 7 mph becoming southeast in the afternoon.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 45. East wind 5 to 7 mph becoming southwest in the evening.
Sunny on Thursday Thursday... Sunny, with a high near 82. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 49. Northwest wind 6 to 11 mph becoming light north northwest after midnight. Winds could gust as high as 20 mph.
Sunny on Friday Friday... Sunny, with a high near 82. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 51. North northwest wind 5 to 8 mph becoming light and variable after midnight.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 84. South southwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 21 mph.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 51.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 80.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 50.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 78.
10% chance of thunderstorms Monday Night Monday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 49.
20% chance of rain Tuesday Tuesday... A chance of showers. Mostly sunny, with a high near 74.
Current Radar Image


Sun Almanac for Portal, Montana
Sunrise: 05:53 AM
Sunset: 9:16 PM
Civil Sunrise:05:16 AM
Civil Sunset: 9:53 PM
Nautical Sunrise: 04:27 AM
Nautical Sunset: 10:42 PM
Astro Sunrise: 03:25 AM
Astro Sunset: 11:45 PM
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