Boise, Idaho – Idaho’s stretch of summer heat isn’t done yet, with highs pushing into the mid-90s through Thursday before rain chances arrive this weekend. Drivers, especially along I-84 near Boise, should prepare for slick conditions if showers develop late Friday into Saturday.
According to the National Weather Service, Wednesday’s high will hit 96 degrees under mostly sunny skies. Calm winds will shift northwest in the afternoon, bringing little relief from the heat. Nights will stay mild, with lows in the upper 60s. The heat continues Thursday with another 95-degree day before a slight cooldown arrives by Friday.
Friday marks the transition. Clouds increase, and a 20 percent chance of showers develops after midnight. By Saturday, rain chances rise to 30 percent, with thunderstorms possible in the afternoon. Any storms could bring localized downpours, lightning, and hazardous driving conditions.
The late-week change offers a reminder that early September can swing quickly between summer heat and fall storms. Boise residents should limit outdoor activity during peak afternoon heat, stay hydrated, and keep an eye on changing road conditions into the weekend. Outdoor plans, including football games and fall events, may see interruptions Saturday.
The pattern continues into early next week, with cooler highs in the low 80s and occasional showers expected through Monday.
Five Day Forecast for Boise, Idaho:
- Wednesday: Mostly sunny, high 96, low 68.
- Thursday: Hot and sunny, high 95, low 66.
- Friday: Partly sunny, high 91, showers possible overnight, low 65.
- Saturday: Chance of showers, thunderstorms possible, high 85, low 61.
- Sunday: Partly sunny with isolated showers, high 85, low 60.
