Grass Valley, Montana Weather
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Weather Forecast for Grass Valley, Montana : Missoula County
Issued: 3:30 am MDT May 11, 2025 Latitude: 46.9357561 Longitude: -114.1403915 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday
50% chance of thunderstorms on This Afternoon 60% chance of thunderstorms on Tonight 70% chance of thunderstorms on Monday 70% chance of thunderstorms on Tuesday 60% chance of thunderstorms on Wednesday 20% chance of rain on Thursday 20% chance of rain on Friday 70% chance of rain on Saturday
High: 76°F Low: 45°F High: 63°F High: 59°F High: 60°F High: 62°F High: 62°F High: 64°F
Low: 40°F Low: 39°F Low: 42°F Low: 40°F Low: 41°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Rain Rain Rain
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Current Conditions at
HELENA - (KHLN)
73°
Clear
as of 1:30 PM MDST
Rel. Humidity: 29%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.71 in.
Flight Rule: VFR
Wind Data
18 MPH
Gust: 33 MPH
200° South
Cloud Level(s): Clear
50% chance of thunderstorms This Afternoon This Afternoon... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Southwest wind around 6 mph.
60% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then rain likely after 3am. Mostly cloudy, with a low around 45. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%.
70% chance of thunderstorms Monday Monday... Rain likely before noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 63. Light west northwest wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 70%.
30% chance of rain Monday Night Monday Night... A 30 percent chance of rain. Mostly cloudy, with a low around 40. West wind 5 to 9 mph becoming calm after midnight.
70% chance of thunderstorms Tuesday Tuesday... A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
30% chance of rain Tuesday Night Tuesday Night... A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 39.
60% chance of thunderstorms Wednesday Wednesday... A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.
20% chance of rain Wednesday Night Wednesday Night... A chance of rain. Mostly cloudy, with a low around 42.
20% chance of rain Thursday Thursday... A chance of rain. Mostly cloudy, with a high near 62.
10% chance of rain Thursday Night Thursday Night... A slight chance of rain. Mostly cloudy, with a low around 40.
20% chance of rain Friday Friday... A chance of rain. Mostly cloudy, with a high near 62.
20% chance of rain Friday Night Friday Night... A chance of rain. Mostly cloudy, with a low around 41.
70% chance of rain Saturday Saturday... Rain likely. Mostly cloudy, with a high near 64.
Current Radar Image


Sun Almanac for Grass Valley, Montana
Sunrise: 06:06 AM
Sunset: 9:00 PM
Civil Sunrise:05:30 AM
Civil Sunset: 9:36 PM
Nautical Sunrise: 04:45 AM
Nautical Sunset: 10:21 PM
Astro Sunrise: 03:50 AM
Astro Sunset: 11:16 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.