Boise, ID – The Treasure Valley wakes to calm, crisp air this morning under starry skies and a quiet chill around 34°F. A streak of sun-soaked days will carry Idaho through Halloween weekend — but models are beginning to hint at a bigger seasonal turn ahead.
According to the National Weather Service, Boise will warm steadily from the mid-50s today to near 67°F by Saturday. The air stays dry, skies mostly sunny, and winds light — ideal for outdoor decorating, yard cleanups, or trick-or-treat events Friday evening. Nights remain cool, dropping into the mid-30s, cold enough for patchy frost on rooftops and car windshields.
By Sunday, temperatures hover near 60°F, marking one last comfortable stretch before upper-level shifts start steering colder air toward the Northwest. Meteorologists note early signs of a developing jet stream pattern that could trigger Idaho’s first measurable snow chances of November between the 9th and 18th. Higher elevations around McCall, Stanley, and the Boise Mountains stand first in line, though even valley flurries can’t be ruled out later in the month.
For now, it’s a postcard-perfect Halloween weekend. But as November settles in, the region’s mild spell may give way to a much colder rhythm. Residents are advised to prepare vehicles, test heating systems, and wrap up outdoor maintenance while the weather still cooperates.
After all, Boise’s calm fall skies have a way of turning fast once November winds arrive.
