I-15 Weather Conditions and Forecasts

2025-10-15 Roadnow

I-15 Monday 2025-10-20 weather conditions

• detailI-15 Montana: Snow Likely, 40°F
• detailI-15 Idaho: Chance Showers, 38°F
• detailI-15 Utah: Chance Showers, 44°F
• detailI-15 Arizona: Mostly Clear, 54°F
• detailI-15 Nevada: Sunny, 60°F
• detailI-15 California: Mostly Clear, 55°F

I-15 7 day weather forecast