I-15 Weather Conditions and Forecasts

2026-09-10 Roadnow

I-15 Tonight 2026-09-10 weather conditions

• detailI-15 Montana: Chance Showers then Showers, 49°F
• detailI-15 Idaho: Mostly Cloudy, 81°F
• detailI-15 Utah: Increasing Clouds, 89°F
• detailI-15 Arizona: Mostly Clear, 105°F
• detailI-15 Nevada: Mostly Clear, 106°F
• detailI-15 California: Clear, 99°F

I-15 7 day weather forecast