Pendleton, Oregon – Sweltering temperatures are set to grip Eastern Oregon and Southeast Washington through Labor Day, with several cities expected to flirt with or break long-standing heat records by midweek. Highs will surge into the triple digits starting Tuesday, especially in the Tri-Cities, Walla Walla, and Ellensburg, where 101°F to 102°F readings are possible.
According to the National Weather Service in Pendleton, Tuesday’s highs will push close to or above daily records in multiple locations, with the hottest days expected between Tuesday and Thursday. Walla Walla could see temperatures reach 102°F on Tuesday, nearing the 1950 record of 104°F. In Hermiston, the heat will peak around 101°F, just shy of the 2002 benchmark. Meacham will be spared the worst but will still see highs pushing 90°F.
Cities like Yakima, Redmond, and The Dalles are also in line for blistering afternoon heat, with overnight lows struggling to drop below the mid-60s—offering little relief for residents or energy grids. Residents are urged to limit outdoor activity during peak afternoon hours, stay hydrated, and check on vulnerable neighbors.
The heat is expected to linger into late next week, with more advisories possible if record-breaking trends continue.
Five-Day Forecast for Pendleton, OR:
- Saturday: 95°F, sunny
- Sunday: 95°F, hot and dry
- Monday (Labor Day): 96°F, increasing heat
- Tuesday: 99°F, near-record heat
- Wednesday: 99°F, continued hot and dry conditions
