Eugene, Ore. – Drivers and residents in Lane County should prepare for summerlike heat on Tuesday as temperatures climb near 90°F in Eugene. That spike in heat could affect travelers along Interstate 5, where sun glare and rising pavement temperatures create safety concerns. Staying hydrated and limiting outdoor activity in peak hours is strongly advised.
According to the National Weather Service in Portland, Eugene will reach a high near 88°F on Tuesday, September 16, under clear skies and light winds. Monday night remains mild with lows around 50°F, offering little relief before the sharp warmup Tuesday. The heat will ease slightly by Wednesday, but highs are still expected to top 80°F.
Residents across Springfield, Cottage Grove, and Junction City should expect similar heat. Roadways like OR-126 and Beltline Highway could also see higher travel demand as the week begins. Outdoor workers and students heading back to classrooms need to take extra precautions in the afternoon sun. Pets should not be left in vehicles, even briefly.
The stretch of dry, warm weather continues through Thursday, with partly sunny skies and highs in the upper 70s to low 80s. A subtle shift arrives by the weekend as clouds build and rain chances increase. The first signs of fall may appear by Sunday when light showers could develop.
More advisories could be issued later this week if heat or early fall rain impacts grow.
Five Day Forecast for Eugene, Oregon
- Tuesday: Sunny, high 88°F, low 54°F.
- Wednesday: Sunny, high 81°F, low 54°F.
- Thursday: Partly sunny, high 78°F, low 55°F.
- Friday: Mostly sunny, high 82°F, low 57°F.
- Saturday: Mostly sunny, high 82°F, low 57°F.
