Boise, Idaho – Sweltering summer temperatures are back across southern Idaho, with Boise expected to reach 89°F by Thursday afternoon and highs near 94°F by Sunday. A stretch of dry, sunny days is setting in, creating increased fire risk, strain on cooling systems, and concern for outdoor workers.
According to the National Weather Service in Boise, light afternoon winds will accompany the rising temperatures, with calm, mostly clear nights providing little overnight relief. Residents should avoid prolonged sun exposure, hydrate frequently, and limit strenuous activity between 1 p.m. and 5 p.m. when heat peaks.
High pressure over the Intermountain West will lock in this pattern through at least Monday. The Treasure Valley, including Eagle, Meridian, and Nampa, will see near-daily highs between 88°F and 94°F with minimal cloud cover. No precipitation is in sight, and with humidity staying below 30%, the area is entering a critical drying phase.
Motorists along I-84 should check vehicle cooling systems and tire pressure before extended travel. Energy demand may spike across the Boise metro as residents rely on air conditioning during the late-June heat wave.
This warming trend is not unusual for the last week of June, but locals are reminded this is the longest, hottest stretch of the year so far.
Stay tuned for any heat advisories or fire weather watches.
🌤 Boise 5-Day Forecast: June 25–30
- Wednesday, June 25: High 93°F, mostly sunny and hot
- Thursday, June 26: High 89°F, sunny and dry
- Friday, June 27: High 88°F, sunny, low 58°F
- Saturday, June 28: High 89°F, clear skies
- Sunday, June 29: High 94°F, hot with calm winds
- Monday, June 30: High near 101°F, mostly sunny
