Pendleton, Oregon – Unrelenting sun and rising heat will grip northeastern Oregon starting Friday, with temperatures in Pendleton spiking to 90°F by mid-afternoon and climbing sharply into the weekend. The National Weather Service warns that the hottest stretch of the year so far will peak Sunday with a sweltering 99°F high. Prolonged heat may impact outdoor activities and travel, especially along I-84, where vehicle overheating and driver fatigue could become concerns.
According to the National Weather Service in Pendleton, light north winds Friday will shift to variable breezes by evening, offering little relief. Saturday will be even hotter, with clear skies and a high near 93°F. By Sunday, Pendleton could reach 99°F under intense sun and still air, prompting heat safety reminders: limit midday activity, stay hydrated, and check on vulnerable neighbors.
The heatwave continues into early next week. Monday stays dangerously hot at 98°F, with only a slight dip to 94°F by Tuesday. Overnight lows remain in the low 60s, offering minimal overnight cooling.
Outdoor workers, athletes, and travelers are urged to plan early-day activities and use sun protection. With the clear skies expected through Tuesday night, wildfire risk may rise in rural Umatilla County.
Five-Day Forecast for Pendleton (June 5–10):
- Thursday: Sunny, high near 84°F
- Friday: Mostly sunny, high near 90°F
- Saturday: Sunny, high near 93°F
- Sunday: Hot, high near 99°F
- Monday: Sunny and hot, high near 98°F
- Tuesday: Sunny, high near 94°F
