Arnold, Montana Weather
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Weather Forecast for Arnold, Montana : Gallatin County
Issued: 8:22 am MDT May 9, 2025 Latitude: 45.7143729 Longitude: -111.3549603 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Mostly Sunny on This Afternoon Cloudy on Tonight Mostly Sunny on Saturday 50% chance of thunderstorms on Sunday 30% chance of on Monday 20% chance of thunderstorms on Tuesday Rain on Wednesday 20% chance of thunderstorms on Thursday
High: 77°F Low: 48°F High: 82°F High: 75°F High: 69°F High: 57°F High: 50°F High: 57°F
Low: 52°F Low: 49°F Low: 42°F Low: 39°F Low: 38°F  
Mostly Sunny Cloudy Mostly Sunny Thunderstorms Partly Sunny Thunderstorms Rain Thunderstorms
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Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 77. North wind 6 to 8 mph becoming south southwest.
Cloudy on Tonight Tonight... Partly cloudy, with a low around 48. Southeast wind 6 to 9 mph becoming south southwest after midnight.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 82. South southeast wind 6 to 11 mph becoming south southwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
20% chance of thunderstorms Saturday Night Saturday Night... A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South wind 10 to 18 mph, with gusts as high as 31 mph.
50% chance of thunderstorms Sunday Sunday... A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 75. Breezy, with a south southwest wind 8 to 13 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.
30% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49. South wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 30%.
30% chance of Monday Monday... A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 69. Southwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph.
20% chance of rain Monday Night Monday Night... A chance of showers. Mostly cloudy, with a low around 42. Southwest wind 15 to 20 mph becoming northwest 6 to 11 mph after midnight. Winds could gust as high as 32 mph.
20% chance of thunderstorms Tuesday Tuesday... A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 57.
Rain on Tuesday Night Tuesday Night... Showers likely. Mostly cloudy, with a low around 39.
Rain on Wednesday Wednesday... Showers likely. Mostly cloudy, with a high near 50.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 38.
20% chance of thunderstorms Thursday Thursday... A chance of showers and thunderstorms. Partly sunny, with a high near 57.
Sun Almanac for Arnold, Montana
Sunrise: 06:01 AM
Sunset: 8:43 PM
Civil Sunrise:05:27 AM
Civil Sunset: 9:17 PM
Nautical Sunrise: 04:44 AM
Nautical Sunset: 10:00 PM
Astro Sunrise: 03:53 AM
Astro Sunset: 10:50 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.