PENDLETON, Ore. – A sharp Freeze Warning across Eastern Oregon is signaling the season’s first hard chill Wednesday morning, with sub-freezing temperatures threatening sensitive crops and outdoor plumbing. Temperatures are expected to plunge as low as 28°F in parts of the Columbia Basin and the lower Blue Mountain foothills.
According to the National Weather Service in Pendleton, the freeze warning covers Pendleton, Hermiston, Boardman, and the Tri-Cities area through 9 a.m. Wednesday. Farmers and homeowners should take precautions by covering tender plants, draining irrigation lines, and protecting exposed pipes. Early commuters along I-84 and local farm routes should be prepared for patchy frost and possible slick spots on rural bridges.
Despite the cold start, skies will clear quickly through the day, allowing sunshine and light winds to return by Wednesday afternoon. Highs will rebound into the upper 50s, climbing into the 60s by Thursday and Friday as high pressure strengthens over the Pacific Northwest. The late-week pattern will deliver bright fall afternoons and crisp, calm mornings — ideal for harvest work and outdoor plans.
Looking ahead, the weekend will start dry and mild before a weak system brings a slight chance of showers Saturday night into Sunday. Temperatures will remain seasonable, with highs in the upper 60s and lows in the 30s.
This early freeze marks a true seasonal shift for Eastern Oregon — a reminder to prepare now for cooler, longer nights as fall settles in for good.
Five-Day Forecast for Pendleton, OR:
Wed: 57/33 – Frost early; sunny and cool.
Thu: 65/39 – Mostly sunny; calm afternoon.
Fri: 65/35 – Sunny; warming trend continues.
Sat: 69/43 – Mostly sunny; slight chance of late showers.
Sun: 60/38 – Partly cloudy; brief rain possible.
