Portal, Montana Weather
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Weather Forecast for Portal, Montana : Jefferson County
Issued: 2:37 pm MDT May 11, 2025 Latitude: 46.3374295 Longitude: -112.1183343 View on Google Maps

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This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
50% chance of thunderstorms on This Afternoon 40% chance of thunderstorms on Tonight 30% chance of rain on Monday 80% chance of thunderstorms on Tuesday 70% chance of thunderstorms on Wednesday Thunderstorms on Thursday 20% chance of thunderstorms on Friday Thunderstorms on Saturday Thunderstorms on Sunday
High: 72°F Low: 45°F High: 64°F High: 50°F High: 51°F High: 52°F High: 55°F High: 58°F High: 54°F
Low: 37°F Low: 37°F Low: 38°F Low: 35°F Low: 38°F Low: 37°F  
Thunderstorms Thunderstorms Rain Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
HELENA - (KHLN)
64°
Cloudy
Light Thunderstorm Rain
as of 3:00 PM MDST
Rel. Humidity: 52%
Dew Point: 46°F
Visibility: 4 Miles
Pressure: 29.77 in.
Flight Rule: MVFR
Wind Data
22 MPH
Gust: 29 MPH
280° West
Cloud Level(s): Few at 3300ft, Broken at 7000ft, Solid Overcast at 11000ft
Current Conditions at
BUTTE - (KBTM)
57°
Cloudy
Heavy Rain
as of 3:04 PM MDST
Rel. Humidity: 58%
Dew Point: 43°F
Visibility: 2 1/2 Miles
Pressure: 29.81 in.
Flight Rule: IFR
Wind Data
6 MPH
Gust: 44 MPH
170° South
Cloud Level(s): Few at 2500ft, Broken at 5500ft, Solid Overcast at 7000ft
Current Conditions at
BOZEMAN - (KBZN)
73°
Clear
as of 2:56 PM MDST
Rel. Humidity: 33%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 29.78 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 23 MPH
150° Southeast
Cloud Level(s): Clear
Current Conditions at
DILLON - (KDLN)
70°
Mostly Cloudy
as of 2:53 PM MDST
Rel. Humidity: 30%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 29.76 in.
Flight Rule: VFR
Wind Data
28 MPH
Gust: 41 MPH
180° South
Cloud Level(s): Scattered at 9000ft, Broken at 11000ft
50% chance of thunderstorms This Afternoon This Afternoon... A 50 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 72. Southwest wind 17 to 20 mph, with gusts as high as 31 mph.
40% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 45. South southwest wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
30% chance of rain Monday Monday... A 30 percent chance of showers, mainly after 5pm. Increasing clouds, with a high near 64. Breezy, with a southwest wind 10 to 15 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 39 mph.
70% chance of rain Monday Night Monday Night... Showers likely. Cloudy, with a low around 37. West northwest wind 6 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
80% chance of thunderstorms Tuesday Tuesday... Showers likely, then showers and possibly a thunderstorm after noon. High near 50. West northwest wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
60% chance of rain Tuesday Night Tuesday Night... Showers likely, mainly before midnight. Cloudy, with a low around 37. West northwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
70% chance of thunderstorms Wednesday Wednesday... A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 51. West northwest wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 38. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thunderstorms on Thursday Thursday... Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 52.
10% chance of rain Thursday Night Thursday Night... A slight chance of showers before midnight. Mostly cloudy, with a low around 35.
20% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms. Mostly cloudy, with a high near 55.
20% chance of rain Friday Night Friday Night... A chance of showers. Mostly cloudy, with a low around 38.
Thunderstorms on Saturday Saturday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 58.
Rain on Saturday Night Saturday Night... Showers likely. Mostly cloudy, with a low around 37.
Thunderstorms on Sunday Sunday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 54.
Current Radar Image


Sun Almanac for Portal, Montana
Sunrise: 05:59 AM
Sunset: 8:50 PM
Civil Sunrise:05:24 AM
Civil Sunset: 9:25 PM
Nautical Sunrise: 04:40 AM
Nautical Sunset: 10:10 PM
Astro Sunrise: 03:47 AM
Astro Sunset: 11:03 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.