I-15 Weather Conditions and Forecasts

2026-03-19 Roadnow

I-15 Saturday Night 2026-03-21 weather conditions

• detailI-15 Montana: Mostly Clear, 56°F
• detailI-15 Idaho: Mostly Cloudy, 74°F
• detailI-15 Utah: Partly Cloudy, 80°F
• detailI-15 Arizona: Mostly Cloudy, 97°F
• detailI-15 Nevada: Mostly Cloudy, 96°F
• detailI-15 California: Partly Cloudy, 96°F

I-15 7 day weather forecast