I-15 Weather Conditions and Forecasts

2026-09-10 Roadnow

I-15 Friday Night 2026-09-11 weather conditions

• detailI-15 Montana: Mostly Cloudy, 52°F
• detailI-15 Idaho: Decreasing Clouds, 69°F
• detailI-15 Utah: Partly Cloudy, 85°F
• detailI-15 Arizona: Mostly Clear, 100°F
• detailI-15 Nevada: Mostly Clear, 100°F
• detailI-15 California: Mostly Clear, 91°F

I-15 7 day weather forecast