Oregon Winter Weather: Chilly, Foggy Mornings Before Rain Builds Late Week in Medford

Drivers urged to use caution on I-5 and valley roads as slick spots linger before rain returns by Thursday.

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Chilly nights weather
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MEDFORD, OR — The Rogue Valley wakes under a thick, icy haze this morning as freezing fog grips southern Oregon, leaving frosted windshields, slick bridges, and reduced visibility through early hours. It’s a cold, still start — temperatures hover near 28°F — and travel across I-5 and local backroads could be hazardous until midmorning.

According to the National Weather Service in Medford, the fog will gradually lift by 8 or 9 a.m., giving way to sunshine and highs near 48°F. Calm winds will keep the air dense and stagnant through midweek, allowing more patchy fog and frost to form late Monday and Tuesday mornings.

By Tuesday, skies clear briefly with highs around 53°F, but conditions stay crisp. Freezing fog may redevelop before dawn Wednesday, creating visibility under a quarter mile in spots near Central Point and Eagle Point.

Meteorologists say a Pacific front will arrive Thursday, marking a shift to milder but wetter weather. Expect clouds to thicken through the day with a chance of rain by evening. Rain becomes more likely Friday into the weekend, with highs climbing to the mid-50s — a seasonal reminder that December’s wet pattern is settling in.

5-Day Outlook (Medford, OR):

  • Monday: Freezing fog early, mostly sunny, high 48°F.
  • Tuesday: Sunny, high 53°F.
  • Wednesday: Patchy fog early, high 49°F.
  • Thursday: Rain possible late, high 53°F.
  • Friday: Rain likely, high 56°F.