Boise, Idaho – The Treasure Valley starts Sunday under smoky skies, with temperatures pushing near 88°F by afternoon. Drivers on I-84 may encounter reduced visibility from haze, a reminder of wildfire activity across the Northwest.
According to the National Weather Service, patchy smoke lingers Sunday before sunshine breaks through. Highs climb to near 87°F Monday under mostly clear skies. By Tuesday, storm chances return, with a 20 percent risk of showers in the afternoon. Rain chances increase to 30 to 50 percent Wednesday and Thursday, when highs dip into the mid-70s.
The NOAA long-range precipitation outlook highlights the Pacific Northwest with above-normal rainfall potential through mid-September. That trend supports Boise’s pattern shift from dry, smoky air to a wetter and cooler setup later this week.
While no widespread severe weather is expected, brief downpours, lightning, and gusty winds could affect midweek commutes. Outdoor events and recreation in the Boise Foothills and Treasure Valley should be watched closely as skies turn unsettled.
Residents sensitive to smoke should limit outdoor activity Sunday. By Wednesday, the focus turns to rain potential and cooler temperatures, signaling a taste of early fall across southwest Idaho.
Five-Day Forecast for Boise, Idaho
- Monday: Mostly sunny, high 87°F, light winds
- Tuesday: 20% chance of showers, high 78°F
- Wednesday: 30% chance of storms, high 76°F
- Thursday: 50% chance of showers, high 75°F
- Friday: 40% chance of showers, high 76°F, breezy
