I-45 Texas Travel Weather: Clear Skies, Calm Winds, and Early Frost Give Way to a Mild Weekend

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A calm, crisp morning greets southeast Texas, the kind that makes you reach for a light jacket before heading out. The chill won’t last long — a steady December warm-up begins today, with clear skies and calm breezes carrying Houston toward a sun-filled stretch through late week.

The National Weather Service in Houston notes that morning lows near 42°F will rebound quickly into the mid-60s by afternoon, with light southerly winds adding a comfortable feel. Expect more of the same midweek as highs push into the low 70s by Wednesday, the kind of mild warmth that reminds locals how fleeting Texas winter can be.

By Thursday and Friday, sunshine dominates as highs reach the upper 70s, nearly 10–12 degrees above seasonal averages. It’s a perfect setup for holiday decorating, outdoor dining, or early Christmas shopping without bundling up. Nights remain pleasant, with lows in the 50s to low 60s, keeping roads dry and skies clear for travel across I-45, Highway 59, and Beltway 8.

Looking ahead to the weekend, Saturday stays mild near 77°F, though subtle moisture hints suggest clouds could thicken late Sunday as a weak front approaches. Early next week, models show a small chance of showers, but no major weather disruptions appear on the horizon.

Five-Day Outlook (Houston, TX)

  • Tuesday: Sunny, high 64°F, low 50°F.
  • Wednesday: Sunny, high 72°F, low 52°F.
  • Thursday: Sunny, high 68°F, low 57°F.
  • Friday: Mostly sunny, high 76°F, low 61°F.
  • Saturday: Partly sunny, high 77°F.