I-15 Weather Conditions and Forecasts

2026-10-22 Roadnow

I-15 Friday Night 2026-10-23 weather conditions

• detailI-15 Montana: Chance Snow, 42°F
• detailI-15 Idaho: Chance Rain then Partly Cloudy, 51°F
• detailI-15 Utah: Slight Chance Rain, 59°F
• detailI-15 Arizona: Sunny, 73°F
• detailI-15 Nevada: Mostly Clear, 74°F
• detailI-15 California: Partly Cloudy, 80°F

I-15 7 day weather forecast