I-15 Weather Conditions and Forecasts

2026-08-16 Roadnow

I-15 Overnight 2026-08-16 weather conditions

• detailI-15 Montana: Partly Cloudy, 82°F
• detailI-15 Idaho: Slight Chance Showers, 85°F
• detailI-15 Utah: Sunny, 93°F
• detailI-15 Arizona: Mostly Clear, 102°F
• detailI-15 Nevada: Sunny, 100°F
• detailI-15 California: Mostly Clear, 96°F

I-15 7 day weather forecast