I-15 Weather Conditions and Forecasts

2025-10-15 Roadnow

I-15 Saturday 2025-10-18 weather conditions

• detailI-15 Montana: Mostly Sunny, 51°F
• detailI-15 Idaho: Mostly Clear, 52°F
• detailI-15 Utah: Sunny, 61°F
• detailI-15 Arizona: Mostly Clear, 74°F
• detailI-15 Nevada: Sunny, 74°F
• detailI-15 California: Clear, 75°F

I-15 7 day weather forecast