Phoenix to Las Vegas — Weather & Driving Conditions
Driving from Phoenix, AZ to Las Vegas, NV? This 300-mile route follows I-17, I-40, US-93. TripCaptain checks the weather at every stop along the way — not just at each end — so you can see where conditions change before you pick a departure time.
What to watch for on this route
TripCaptain flags black ice, dense fog, heavy snow, high wind, heavy rain, and low visibility segment by segment between Phoenix, AZ and Las Vegas, NV, and gives the trip a clear Hazard Score™ — a 0-100 read where higher is safer.
- Extreme Heat: Summer temps routinely exceed 46°C (115°F). Vehicle breakdowns are common and deadly without water.
- Dust Storm: Haboobs (massive dust walls) can appear suddenly, reducing visibility to zero. Pull over immediately.
- Flooding: Monsoon season (July-September) brings flash floods that cross roadways in minutes.
When to go, season by season
- Spring (Mar–May): Ideal driving season. Warm but not extreme. Low precipitation. Clear visibility.
- Summer (Jun–Aug): Extremely dangerous heat. Drive at night or very early morning. Carry 1 gallon of water per person.
- Fall (Sep–Nov): Monsoon season ends in September. October-November is excellent for driving.
- Winter (Dec–Feb): Pleasant desert temps. Light jacket weather. Fog possible near Hoover Dam in early morning.
Pick the safest time to leave
Compare departure windows for Phoenix to Las Vegas and choose the one with the lowest risk and the arrival time you want.
Fuel, EV range, and rest stops
See a weather-adjusted fuel or EV energy estimate for the drive, sensible break points across the 300 miles, and a packing list matched to the conditions ahead.