I-15 weather conditions near Sweet Grass, Montana

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: unknown precip 32°F 2025-12-09T09:15:00
• Today 2025-12-09, Breezy. Chance Snow then Mostly Sunny. A 50 percent chance of snow before 10am. Cloudy early, then gradual clearing, with a temperature falling to around 32 by 5pm. Breezy, with a west wind 18 to 24 mph, with gusts as high as 34 mph. Little or no snow accumulation expected.
• Tonight 2025-12-09, Partly Cloudy then Chance Snow. A 40 percent chance of snow after 1am. Increasing clouds, with a low around 21. West wind 8 to 15 mph becoming south after midnight. Winds could gust as high as 22 mph. New snow accumulation of less than a half inch possible.
• Wednesday 2025-12-10, Breezy. Chance Rain/Snow then Mostly Cloudy. A chance of rain and snow, mainly between 8am and 11am. Mostly cloudy, with a high near 41. Breezy, with a south wind 18 to 23 mph becoming west in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
• Wednesday Night 2025-12-10, Chance Rain/Snow. A chance of rain before 8pm, then a chance of rain and snow between 8pm and 2am, then a chance of snow after 2am. Cloudy, with a low around 7. West southwest wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
• Thursday 2025-12-11, Snow. Snow. High near 30. West southwest wind 16 to 18 mph becoming north in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
• Thursday Night 2025-12-11, Chance Snow. A 40 percent chance of snow. Cloudy, with a low around -7. North wind 7 to 14 mph, with gusts as high as 20 mph. New snow accumulation of less than one inch possible.
• Friday 2025-12-12, Snow Likely. Snow likely, mainly after 11am. Mostly cloudy and cold, with a high near 5. Southeast wind 8 to 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
• Friday Night 2025-12-12, Snow Likely. Snow likely, mainly before 11pm. Mostly cloudy, with a low around -9. East southeast wind around 10 mph becoming northwest after midnight.
• Saturday 2025-12-13, Slight Chance Snow. A slight chance of snow. Mostly cloudy, with a high near 10.
• Saturday Night 2025-12-13, Mostly Cloudy. Mostly cloudy, with a low around 3.
• Sunday 2025-12-14, Partly Sunny. Partly sunny, with a high near 33.
• Sunday Night 2025-12-14, Mostly Cloudy. Mostly cloudy, with a low around 15.
• Monday 2025-12-15, Partly Sunny. Partly sunny, with a high near 37.