I-15 Weather Conditions and Forecasts

2026-07-24 Roadnow

I-15 Wednesday 2026-07-29 weather conditions

• detailI-15 Montana: Sunny, 62°F
• detailI-15 Idaho: Hot, 65°F
• detailI-15 Utah: Hot, 75°F
• detailI-15 Arizona: Slight Chance T-storms, 87°F
• detailI-15 Nevada: Hot, 89°F
• detailI-15 California: Sunny, 70°F

I-15 7 day weather forecast