I-15 Weather Conditions and Forecasts

2025-12-29 Roadnow

I-15 Tuesday 2025-12-30 weather conditions

• detailI-15 Montana: Mostly Sunny, 45°F
• detailI-15 Idaho: Sunny, 45°F
• detailI-15 Utah: Sunny, 52°F
• detailI-15 Arizona: Mostly Clear, 63°F
• detailI-15 Nevada: Mostly Clear, 61°F
• detailI-15 California: Mostly Cloudy, 68°F

I-15 7 day weather forecast