EUGENE, Ore. – A picture-perfect stretch of fall sunshine will dominate Oregon’s Willamette Valley through Tuesday before a midweek change brings a chance of rain and cooler air. Afternoon highs will climb into the upper 70s by Tuesday — nearly ten degrees above normal for early October — before clouds return Wednesday.
According to the National Weather Service in Portland, light north winds and clear skies will keep mornings crisp, with lows dipping into the low to mid-40s. The calm pattern favors outdoor plans, pumpkin patch visits, and leaf-viewing drives along I-5 and Highway 126. However, residents are advised to prepare for slick roads and possible slower commutes by midweek as scattered showers return Wednesday night into Thursday.
Forecasters note that this early-October warmth may be the last extended mild spell before stronger Pacific systems arrive later in the month. Gardeners should use the next few dry days to wrap up fall planting and check gutters ahead of the wet transition. Power crews and maintenance teams are also watching for increased debris flow along rural routes once the rain begins.
By late week, temperatures will ease back into the 60s, signaling a more seasonable feel as Oregon edges deeper into fall. While no major flooding or wind hazards are expected, early travelers should plan for reduced visibility in valley fog pockets after Wednesday.
Five-Day Forecast for Eugene, OR:
Sun: 72/43 – Becoming sunny; light NW breeze.
Mon: 77/44 – Sunny, calm; perfect for outdoor plans.
Tue: 78/45 – Mostly sunny; unseasonably warm afternoon.
Wed: 66/45 – Partly cloudy; slight chance of late-day rain.
Thu: 67/46 – Chance of rain; cooler with damp roads likely.
