Eugene, Oregon Weather: September Heat Peaks Thursday Before Fall Showers Return Friday Night

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Eugene, Ore. – Drivers and families in western Oregon should prepare for a quick shift from heat and haze Thursday to a wet, fall-like weekend. The National Weather Service warns of reduced visibility from widespread haze Thursday afternoon, followed by a chance of showers and thunderstorms starting Friday. Outdoor plans, including high school football, may face delays or wet conditions.

According to the National Weather Service in Portland, Eugene will reach 93 degrees Thursday before haze sets in late in the day. Conditions turn unsettled Friday with highs near 85 and a 30% chance of thunderstorms after 2 p.m. Rainfall could slick roadways, including I-5 near Eugene, just as evening traffic peaks.

Saturday brings a 30% chance of morning showers, with skies clearing later in the day. Highs will stay near 81, but lingering moisture could keep rural highways and side streets damp. Sunday may start partly sunny, though scattered showers could return by late afternoon.

Residents are urged to limit outdoor exposure during Thursday’s haze, avoid unnecessary travel on wet roads Friday evening, and plan alternate outdoor activities this weekend. While rainfall amounts look light, timing could disrupt events, especially Friday night games and community gatherings.

The unsettled pattern continues into early next week, with daily shower chances and cooler highs in the 70s. NWS forecasters note the region will feel a more typical fall setup by Monday, ending the streak of hot September days.

Five-Day Forecast for Eugene, Oregon:

  • Thursday: Sunny, hazy late. High 93.
  • Friday: Chance of showers and thunderstorms after 2 p.m. High 85.
  • Saturday: Morning showers, then partly sunny. High 81.
  • Sunday: Slight chance of afternoon showers. High 82.
  • Monday: Showers likely, thunderstorms possible after 11 a.m. High 74.