I-15 Weather Conditions and Forecasts

2025-09-14 Roadnow

I-15 Monday Night 2025-09-15 weather conditions

• detailI-15 Montana: Chance Showers, 77°F
• detailI-15 Idaho: Mostly Clear, 81°F
• detailI-15 Utah: Mostly Clear, 87°F
• detailI-15 Arizona: Sunny, 98°F
• detailI-15 Nevada: Mostly Clear, 97°F
• detailI-15 California: Clear, 95°F

I-15 7 day weather forecast