I-15 Weather Conditions and Forecasts

2026-05-19 Roadnow

I-15 Tonight 2026-05-19 weather conditions

• detailI-15 Montana: Mostly Cloudy, 63°F
• detailI-15 Idaho: Mostly Clear, 69°F
• detailI-15 Utah: Mostly Clear, 72°F
• detailI-15 Arizona: Mostly Clear, 88°F
• detailI-15 Nevada: Clear, 88°F
• detailI-15 California: Mostly Clear, 91°F

I-15 7 day weather forecast