Boise, Idaho – Blistering summer heat returns to southern Idaho as Boise braces for a scorching 100°F Thursday, July 17th — the second triple-digit day this week. Air quality may also deteriorate as patchy smoke lingers into the morning hours, creating health concerns for sensitive groups.
According to the National Weather Service, sunshine will dominate the sky Thursday with a northwest breeze at 5 to 7 mph. The heat will peak between 2 and 6 p.m., prompting advisories to limit outdoor activity and stay hydrated. While no official heat advisory is posted yet, residents should monitor conditions closely. Smoke from wildfires is expected to clear by midday but may resurface over the weekend.
Expect similar weather Friday, with another 100°F high under clear skies. Saturday will see a slight dip to 96°F, followed by more hot, sunny days through early next week. Overnight lows remain warm in the mid-60s, offering limited relief for uncooled homes.
🌤️ Five-Day Forecast for Boise, July 17–22:
- Thursday: Sunny, 100°F. Light northwest winds.
- Friday: Sunny and hot, high 100°F. Clear overnight, low 66°F.
- Saturday: High near 96°F. Mostly clear overnight.
- Sunday: Sunny and hot, 92°F. Low around 63°F.
- Monday: Sunny, high 94°F. Low 63°F.
- Tuesday: Continued heat, high 93°F.
Prepare for several days of intense heat — and no rain in sight.
