I-15 Weather Conditions and Forecasts

2025-10-15 Roadnow

I-15 Sunday 2025-10-19 weather conditions

• detailI-15 Montana: Chance Rain, 37°F
• detailI-15 Idaho: Mostly Clear, 40°F
• detailI-15 Utah: Sunny, 39°F
• detailI-15 Arizona: Mostly Clear, 50°F
• detailI-15 Nevada: Mostly Sunny, 56°F
• detailI-15 California: Partly Cloudy, 48°F

I-15 7 day weather forecast