Boise, Idaho – Scorching temperatures will blanket Boise through midweek, with triple-digit heat expected by Tuesday afternoon and highs reaching 103°F.
According to the National Weather Service in Boise, a strong ridge of high pressure is building across the region, pushing daily highs from 91°F on Sunday to 98°F Monday and peaking Tuesday with dangerous heat near 103°F. Residents should avoid strenuous outdoor activity from 1 to 6 p.m., when sun exposure and dehydration risk are highest.
Air-conditioned spaces will be essential for vulnerable groups, including the elderly, children, and pets. Local officials recommend checking on neighbors and reducing electricity strain by cooling homes early in the day. Cooling centers may open if conditions worsen, especially in Ada and Canyon counties.
I-84 drivers between Boise and Nampa should prepare for potential pavement buckling or vehicle overheating. Keep extra water in your car and limit travel during peak heat hours.
The heat is expected to hold through at least Thursday, with no significant cloud cover or rain relief in sight. Winds remain light, providing little natural cooling.
☀️ Five-Day Boise Forecast (Sunday, July 6 – Thursday, July 11):
- Sunday: Sunny and hot, high 91°F. Winds NW around 6 mph.
- Monday: Clear and hotter, high 98°F. Overnight low near 64°F.
- Tuesday: Extreme heat, high 103°F. Mostly clear skies.
- Wednesday: Sunny and hot, high 98°F. Overnight low around 64°F.
- Thursday: Continued heat, high near 98°F. Calm wind.
