Dallas to Houston — Weather & Driving Conditions
Driving from Dallas, TX to Houston, TX? This 240-mile route follows I-45. 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 Dallas, TX and Houston, TX, and gives the trip a clear Hazard Score™ — a 0-100 read where higher is safer.
- Flooding: Houston-area flooding is severe during heavy rain events. I-45 underpasses flood rapidly.
- Thunderstorm: Central Texas sees severe thunderstorms with large hail and tornadoes, especially in spring.
- Extreme Heat: Summer temps regularly exceed 38°C (100°F) with high humidity near Houston.
When to go, season by season
- Spring (Mar–May): Severe thunderstorm and tornado season. Check radar before departing. Hail damage risk.
- Summer (Jun–Aug): Extreme heat with high humidity. Hurricane season begins in June. Watch for tropical weather.
- Fall (Sep–Nov): Hurricane season continues through November. October weather is generally pleasant.
- Winter (Dec–Feb): Mild most days. Rare ice storms can paralyze the region (see February 2021). Generally safe.
Pick the safest time to leave
Compare departure windows for Dallas to Houston 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 240 miles, and a packing list matched to the conditions ahead.