PENDLETON, OR — A clear, frosty stillness grips the Umatilla Valley this morning as temperatures dip near freezing and thin wisps of fog cling to open fields. Streetlights shimmer on frost-covered roofs while the National Weather Service warns of changing conditions that could affect Thanksgiving travel plans across Eastern Oregon.
After a calm and sunny Saturday, a Pacific system edges toward the region, bringing rain late Sunday and cooler air that may push snow levels toward the foothills early next week. Showers will increase Sunday evening, with gusty winds and temperatures dropping into the low 30s by nightfall — cold enough to produce patchy frost and slick rural roads early Monday morning.
By Monday, only a slight chance of rain remains, but the bigger story will be the chill. Highs will barely reach the upper 40s, and lows near 26°F Monday night could create early signs of a winter transition. Tuesday brings another quick-moving system, adding a 20–50% rain chance, while Thanksgiving week itself looks cool, cloudy, and seasonally damp.
Across the U.S., weather models point to a major cold front sweeping from the Rockies into the East by Thanksgiving, likely bringing heavy snow and travel delays for parts of the Midwest and Great Lakes — a sharp contrast to Oregon’s milder but wet pattern.
Five-Day Outlook (Pendleton, OR)
- Sunday: Rain late, high 55°F
- Monday: Slight rain chance, high 48°F
- Tuesday: Rain possible, high 46°F
- Wednesday: Rain likely, high 47°F
- Thanksgiving Day: Cloudy, chance of rain, high 54°F
