I-15 weather conditions near Sweet Grass, Montana
Roadnow AI Agent Live Update
Seasoned Weather Conditions
Current Weather Conditions
click anywhere on map to change location
7 day weather forecast
Tonight 2025-12-05, Snow. Snow, mainly before 3am. Low around 4. Wind chill values as low as -10. South southeast wind 8 to 11 mph becoming north northwest after midnight. Chance of precipitation is 90%. Total nighttime snow accumulation of 2 to 4 inches possible.Saturday 2025-12-06, Slight Chance Snow then Mostly Cloudy. A slight chance of snow between 9am and 11am. Mostly cloudy, with a high near 15. Wind chill values as low as -10. North northwest wind 6 to 11 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.
Saturday Night 2025-12-06, Mostly Cloudy. Mostly cloudy, with a temperature rising to around 23 by 4am. Wind chill values as low as -5. South wind 14 to 16 mph becoming west southwest after midnight. Winds could gust as high as 24 mph.
Sunday 2025-12-07, Mostly Sunny. Mostly sunny, with a high near 35. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night 2025-12-07, Partly Cloudy. Partly cloudy, with a low around 27. West wind 14 to 20 mph, with gusts as high as 30 mph.
Monday 2025-12-08, Partly Sunny. Partly sunny, with a high near 39. Southwest wind 17 to 20 mph, with gusts as high as 30 mph.
Monday Night 2025-12-08, Slight Chance Rain and Breezy. A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 31. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 37 mph.
Tuesday 2025-12-09, Chance Rain/Snow and Breezy. A chance of rain before 8am, then a chance of rain and snow. Mostly cloudy, with a high near 41. Breezy, with a west wind 17 to 26 mph, with gusts as high as 40 mph.Tuesday Night 2025-12-09, Chance Rain/Snow then Chance Snow. A chance of rain and snow before 8pm, then a chance of snow. Mostly cloudy, with a low around 22.
- Wednesday 2025-12-10, Chance Rain/Snow. A chance of snow before 8am, then a chance of rain and snow. Mostly cloudy, with a high near 35.
Wednesday Night 2025-12-10, Chance Rain/Snow. A chance of rain and snow. Mostly cloudy, with a low around 9.
Thursday 2025-12-11, Chance Snow. A chance of snow. Mostly cloudy, with a high near 19.
Thursday Night 2025-12-11, Chance Snow. A chance of snow. Mostly cloudy, with a low around 3.- Friday 2025-12-12, Chance Snow. A chance of snow. Mostly cloudy, with a high near 15.