BOISE, Idaho – Dawn breaks clear and cold across the Treasure Valley, with the foothills glowing faintly pink under a still sky. The air feels crisp now — but by midweek, Idaho’s weather will take a damper, breezier turn as a Pacific system pushes inland.
According to the National Weather Service in Boise, today stays bright and mild with highs near 66 before clouds increase late tonight. Rain chances rise quickly Tuesday, especially through Ada, Canyon, and Elmore Counties, where scattered showers could develop by afternoon and linger into Wednesday. Winds will turn gusty at times, with a stronger wave of moisture expected Wednesday night into Thursday, bringing the region’s best shot at steady rainfall since mid-October.
The midweek system won’t bring snow to the valley, but cooler mountain air will mix in by late Wednesday. Higher elevations near Bogus Basin and Idaho City could see their first light flakes of the month — an early sign that winter’s transition has begun.
Drivers on I-84 should plan for wet pavement, reduced visibility, and gusty side winds from Tuesday night through Thursday morning. Keep wipers in good shape and headlights on during any heavy rain periods.
Conditions should gradually dry out Friday into Saturday, though cooler air will linger into the weekend. With Thanksgiving now less than three weeks away, this pattern shift may signal the first wave of winter systems gearing up across the Northwest.
Five-Day Forecast for Boise, ID:
Mon: 66/48 – Sunny, mild; clouds increase late.
Tue: 59/49 – Mostly cloudy; 50% chance of showers.
Wed: 62/43 – Cloudy; showers likely late day.
Thu: 58/45 – Showers early; partial clearing late.
Fri: 56/38 – Mostly cloudy; lingering light rain possible a.m.
