Pendleton, OR – A dangerous stretch of heat will peak across eastern Oregon and south-central Washington through Tuesday, with daytime highs pushing into the triple digits and lingering well above seasonal norms. Some communities, including Pendleton and the Tri-Cities, could see temperatures 15 degrees above average, raising the risk of heat-related illnesses for anyone without cooling or hydration.
According to the National Weather Service in Pendleton, the heat wave will expand east of the Cascades, with many locations hitting 100°F to 108°F both Monday and Tuesday. While no all-time records are expected to fall, the prolonged heat can be hazardous, particularly for vulnerable populations, pets, and those working outdoors.
Cities such as Hermiston, Yakima, and Kennewick will face elevated heat risk levels, with little overnight relief. Officials urge residents to check on elderly neighbors, ensure pets have shade and water, and avoid strenuous outdoor activity during peak afternoon hours. Hydration and access to air conditioning are key in preventing heat exhaustion.
Temperatures are expected to ease slightly by midweek, but heat advisories may be extended if conditions persist.
Five Day Forecast for Pendleton, OR
- Monday: Sunny, high 105°F, light winds
- Tuesday: Sunny, high 106°F, calm overnight low near 70°F
- Wednesday: Mostly sunny, high 98°F
- Thursday: Partly cloudy, high 94°F
- Friday: Mostly sunny, high 92°F
