Boise commuters could face reduced visibility and slick roads as patchy fog and thunderstorms move into southwestern Idaho Tuesday night. Drivers along Interstate 84 should prepare for slower travel and possible hydroplaning during the Wednesday morning rush.
According to the National Weather Service, showers and thunderstorms are expected to increase after sunset Tuesday, lasting through early Wednesday. Rainfall totals could reach half an inch in some areas. Patchy fog will develop overnight, dropping visibility below a mile in parts of the Treasure Valley.
By Wednesday afternoon, showers taper with partly sunny skies returning, but wet pavement and lingering fog may still challenge drivers. Conditions improve further by Thursday as warmer, drier air moves back into the region.
In Boise, highs will climb into the mid-70s Tuesday before dropping into the low 50s at night. Meridian and Nampa can expect similar conditions, with heavier fog pooling in low-lying stretches. Travelers should allow extra time, use low beams in fog, and avoid speeding on wet highways.
October begins Wednesday with unstable conditions but a steady warmup by week’s end. Outdoor events and fall harvest activities should see calmer, sunnier weather starting Thursday.
More scattered showers are possible midweek, but extended dry periods will dominate western Idaho heading into the weekend. Residents can expect cooler mornings but comfortable afternoons for early October.
Warnings remain in effect through early Wednesday, with updates expected Tuesday night as storms build.
Five Day Forecast for Boise, Idaho
- Tuesday: Showers and thunderstorms, patchy fog late. High 74, low 54.
- Wednesday: Morning showers, then partly sunny. High 72, low 52.
- Thursday: Mostly sunny and drier. High 68, low 47.
- Friday: Partly cloudy, cool morning. High 70, low 45.
- Saturday: Sunny and mild. High 71, low 42.
