I-15 Weather Conditions and Forecasts

2025-09-13 Roadnow

I-15 Wednesday 2025-09-17 weather conditions

• detailI-15 Montana: Sunny, 53°F
• detailI-15 Idaho: Sunny, 50°F
• detailI-15 Utah: Sunny, 57°F
• detailI-15 Arizona: Sunny, 69°F
• detailI-15 Nevada: Sunny, 73°F
• detailI-15 California: Sunny, 64°F

I-15 7 day weather forecast