I-15 Weather Conditions and Forecasts

2026-05-19 Roadnow

I-15 Friday 2026-05-22 weather conditions

• detailI-15 Montana: Mostly Sunny, 78°F
• detailI-15 Idaho: Mostly Sunny, 83°F
• detailI-15 Utah: Mostly Sunny, 90°F
• detailI-15 Arizona: Mostly Clear, 99°F
• detailI-15 Nevada: Sunny, 99°F
• detailI-15 California: Patchy Fog, 87°F

I-15 7 day weather forecast