Portland, OR – Triple-digit heat may not be on the map yet, but Portland is headed into a stretch of sizzling summer sunshine starting Thursday. Temperatures are expected to climb near 90°F by mid-afternoon, with little relief in the evenings as lows remain in the 60s.
According to the National Weather Service in Portland, a dry pattern takes hold beginning Thursday, July 10, with highs near 79°F that day before jumping to 90°F Friday. Sunny skies dominate through Monday, making this an ideal—but potentially risky—weekend for outdoor plans. Hydration, sun protection, and limiting peak-hour exertion are key.
Northwest winds of 3 to 8 mph will offer minimal cooling as highs hover near or just under 90°F Friday through Sunday. Overnight lows stay mild—58°F to 63°F—providing only partial overnight relief.
Impact areas include downtown Portland, surrounding suburbs like Gresham and Beaverton, and key commuter routes including I-84 and I-5. Utility strain is possible with elevated air conditioner use, especially Friday and Saturday. Public cooling centers may open if thresholds are met—residents should monitor Multnomah County alerts.
Those planning to hike, attend outdoor events, or travel this weekend should avoid peak heat hours between noon and 5 p.m. Wear light clothing, apply sunscreen, and keep pets indoors.
The heat builds into early next week, with Tuesday’s high pushing 95°F. There are no thunderstorms or major weather changes expected through Monday, but elevated fire danger could rise if dry conditions persist.
🌤️ 5-Day Forecast: Portland, OR (Thursday, July 10 – Monday, July 15)
- Thursday: Mostly sunny, high near 79°F.
- Friday: Sunny and hot, high near 90°F.
- Saturday: Sunny, high near 89°F.
- Sunday: Sunny again, high near 89°F.
- Monday: Continued sun, high near 87°F.
