I-15 Weather Conditions and Forecasts

2025-12-29 Roadnow

I-15 Thursday Night 2026-01-01 weather conditions

• detailI-15 Montana: Mostly Cloudy, 27°F
• detailI-15 Idaho: Chance Rain/Snow, 19°F
• detailI-15 Utah: Chance Rain, 25°F
• detailI-15 Arizona: Chance Rain, 37°F
• detailI-15 Nevada: Chance Rain, 38°F
• detailI-15 California: Showers Likely, 43°F

I-15 7 day weather forecast