Idaho – Thin clouds drift through a pale dawn over the Treasure Valley, the air cool and still at 39°F — the kind of quiet start that hints at both calm and change. For now, Boise enjoys a mild and mostly dry Thanksgiving stretch, but rain and patchy fog could creep in just in time for Black Friday travel and weekend plans.
According to the National Weather Service in Boise, Thanksgiving Day will be mostly sunny and mild, with highs near 54°F and light winds — a gift for travelers along I-84, Highway 55, and 20/26. Roads will stay dry, visibility high, and conditions ideal for visiting family or kicking off holiday errands.
By Friday morning, that steady late-fall pattern begins to wobble. A weak Pacific system brings a 20% chance of light rain into southwest Idaho, with patchy fog developing near dawn. Any moisture should be light, but drivers should watch for reduced visibility along low-lying routes, especially near the Boise River Basin and foothill valleys.
Saturday brings more of the same — mild temperatures in the mid-40s and another slight rain chance (20%), followed by clearing skies on Sunday. It’s a small reminder that winter is waiting just upstream, with colder, wetter air mass patterns beginning to form across the Northwest.
Looking ahead, early December could mark a shift as colder Arctic air pushes south, potentially bringing snow chances and below-normal temperatures across Idaho and the broader Pacific Northwest.
For now, Boise enjoys a bright and calm Thanksgiving, but travelers should stay alert — late-week fog and drizzle may complicate post-holiday drives.
