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

In the planner, TripCaptain highlights forecast weather risks between Dallas, TX and Houston, TX and summarizes the analysis with a Hazard Score™ from 0 to 100. A higher score indicates lower forecast risk, without guaranteeing road conditions.

• 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.

Compare departure times

Open Dallas to Houston in the planner to check the forecast for your date and compare nearby hours within your plan's limits. Save the trip to follow changing conditions in Live Mode.

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.

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