I-15 Weather Conditions and Forecasts

2026-06-16 Roadnow

I-15 Saturday Night 2026-06-20 weather conditions

• detailI-15 Montana: Slight Chance T-storms then Partly Cloudy, 40°F
• detailI-15 Idaho: Slight Chance Rain, 48°F
• detailI-15 Utah: Mostly Clear, 64°F
• detailI-15 Arizona: Clear, 79°F
• detailI-15 Nevada: Clear, 81°F
• detailI-15 California: Mostly Clear, 59°F

I-15 7 day weather forecast