I-15 Weather Conditions and Forecasts

2026-05-19 Roadnow

I-15 Wednesday 2026-05-20 weather conditions

• detailI-15 Montana: Chance Rain/Snow then Showers, 59°F
• detailI-15 Idaho: Mostly Sunny, 67°F
• detailI-15 Utah: Sunny, 74°F
• detailI-15 Arizona: Sunny, 93°F
• detailI-15 Nevada: Sunny, 94°F
• detailI-15 California: Sunny, 90°F

I-15 7 day weather forecast