Portland woke up to clear skies and a mild start on Sunday, April 5, 2026, with the airport reporting about 48°F under blue skies. High pressure is firmly in control and is set to push afternoon temperatures well above seasonal norms, with interior lowlands climbing into the mid-70s later today. After a frosty start earlier in the weekend, Sunday and Monday are shaping up as the best outdoor stretch the metro has seen in weeks.
Afternoon Heat and Records on the Table
Across much of the Willamette Valley, highs are expected to top out near 76°F on Sunday, with some inland spots holding a 10–30% chance of briefly touching 80°F. Monday looks to deliver similar numbers before a cooler pattern noses back in by midweek. According to NWS Portland, a few record highs may be tied or broken on both Sunday and Monday.
Afternoon Winds and Gorge Gusts
Most of the metro will deal with only light winds, but the Columbia River Gorge and nearby areas around Troutdale, Washougal, and Camas will feel it a bit more. Easterly gusts up to 15–25 mph are possible before easing later in the day. Expect patio umbrellas to shake a little and ridge-top walks to feel breezier than your average neighborhood stroll.
Midweek Turn and Cascade Showers
By Tuesday and Wednesday, onshore flow returns and highs should slip back into the low-to-mid 60s, with the coast staying noticeably cooler. There is a 15–30% chance of light showers over the Oregon Cascades in Lane and Linn counties from Wednesday afternoon through Thursday evening, and pockets of morning frost are still possible away from the Portland metro. NWS Portland is advising anyone with frost-sensitive plants to keep an eye on overnight lows through midweek.
Plan Ahead
For Sunday and Monday, this is prime “get outside while you can” weather. Sunscreen, plenty of water, and shade for vulnerable folks will help as temperatures climb. The National Weather Service is also reminding people that local lakes and rivers remain dangerously cold, so skipping the impulsive jump-in is the smart move. Cold-water shock can be life-threatening, even on a warm afternoon.
