I-15 Weather Conditions and Forecasts

2025-12-31 Roadnow

I-15 Friday Night 2026-01-02 weather conditions

• detailI-15 Montana: Mostly Cloudy, 42°F
• detailI-15 Idaho: Mostly Cloudy, 42°F
• detailI-15 Utah: Mostly Cloudy, 47°F
• detailI-15 Arizona: Mostly Cloudy, 61°F
• detailI-15 Nevada: Mostly Cloudy, 60°F
• detailI-15 California: Chance Showers, 65°F

I-15 7 day weather forecast