Pendleton, OR – Dangerous triple-digit temperatures will grip Pendleton and much of Eastern Oregon through late Tuesday, with the National Weather Service warning of a high risk for heat-related illness. Daytime highs are expected to reach 100 to 103 degrees, with the hottest conditions hitting Monday and Tuesday before relief arrives midweek.
According to the National Weather Service in Pendleton, the Extreme Heat Warning remains in effect until 10 p.m. Tuesday for the Eastern Columbia River Gorge, the Lower Columbia Basin, the Yakima Valley, and foothill communities of the Blue Mountains. Affected cities include Hermiston, The Dalles, Walla Walla, Prosser, and Sunnyside. Officials urge residents to limit outdoor activity, stay hydrated, and check on vulnerable neighbors.
Health agencies stress that prolonged exposure could be dangerous, especially for young children, older adults, and those without access to air conditioning. Outdoor workers are encouraged to take frequent breaks in shade or cooled spaces.
This extreme heat pattern will break late Tuesday night, with cooler conditions arriving Wednesday. Further advisories are not expected after Tuesday night, but residents should stay alert for any updates.
Five Day Forecast for Pendleton, OR:
- Monday: Sunny and dangerously hot. High 100°F, low 64°F.
- Tuesday: Sunny and hot. High 101°F, low 68°F.
- Wednesday: Sunny and cooler. High 93°F, low 58°F.
- Thursday: Sunny. High 85°F, low 56°F.
- Friday: Slight chance of showers, mostly sunny. High 84°F, low 57°F.
