BOISE, Idaho – Dawn breaks calm over the Treasure Valley, but a Pacific system is fast approaching, ready to end the quiet stretch. Clouds will thicken through Thursday as rain spreads into Boise by late afternoon, marking a cool, damp shift that could linger into the weekend.
According to the National Weather Service in Boise, Thursday will start mild and partly sunny, with highs reaching near 69°F before moisture pushes inland from the Cascades. Rain is expected by late evening, and some showers may be briefly heavy before tapering toward Friday morning. Winds will turn southeast at 10 to 15 mph, making the late-day commute slower on I-84 and local arterials from Nampa to Meridian.
Friday will bring clearing skies but slightly cooler air, with highs around 61°F and breezy conditions possible through midday. Temperatures drop again Saturday as drier, more stable air settles in, leaving highs in the mid-50s under mostly sunny skies. By Sunday, another weak system slides through, offering a 20–40% chance of scattered showers and a noticeable chill by early next week.
Long-range models hint at colder air deepening over the Intermountain West after Monday, potentially opening the door for Boise’s first “winter tease” of the season before Thanksgiving week. For now, residents should expect wet roads, falling leaves, and a brisk finish to what’s been an unusually mild November stretch.
While the vivid Northern Lights from this week’s G4 solar storm have faded, minor communication or GPS interference may persist across southern Idaho through early Thursday.
Five-Day Forecast for Boise, ID:
Thu: 69/48 – Partly sunny; rain likely by evening.
Fri: 61/43 – Rain early, then clearing; breezy.
Sat: 57/39 – Mostly sunny; cooler air settling in.
Sun: 57/40 – Chance of showers; partly cloudy.
Mon: 51/32 – Breezy and cooler; spotty rain possible.
