I-15 Weather Conditions and Forecasts

2025-11-20 Roadnow

I-15 Friday 2025-11-21 weather conditions

• detailI-15 Montana: Sunny, 51°F
• detailI-15 Idaho: Decreasing Clouds, 46°F
• detailI-15 Utah: Partly Sunny, 55°F
• detailI-15 Arizona: Mostly Sunny, 66°F
• detailI-15 Nevada: Mostly Cloudy, 66°F
• detailI-15 California: Chance Showers, 66°F

I-15 7 day weather forecast