I-15 Weather Conditions and Forecasts

2025-10-15 Roadnow

I-15 Thursday Night 2025-10-16 weather conditions

• detailI-15 Montana: Mostly Clear, 56°F
• detailI-15 Idaho: Decreasing Clouds, 56°F
• detailI-15 Utah: Partly Cloudy, 64°F
• detailI-15 Arizona: Mostly Clear, 80°F
• detailI-15 Nevada: Mostly Clear, 79°F
• detailI-15 California: Clear, 83°F

I-15 7 day weather forecast