Eastern Oregon Weather Alert: 45°F Chill Now, Showers and Thunderstorms Build by Wednesday in Pendleton

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Oregon – A damp, gray start is settling over Pendleton this morning, with wet pavement and cool air around 45°F making for a slower, cautious drive along I-84 and local roads. Light rain is already spotty, and low clouds are keeping visibility muted across eastern Oregon.

According to the National Weather Service, conditions gradually improve through the day with decreasing clouds and highs near 50°F. That break will be short-lived. A slight chance of rain returns Tuesday afternoon, followed by a stronger push of moisture into midweek.

By Wednesday, rain becomes widespread with an 80% chance during the day and increasing to near 100% by evening. Showers may transition into periods of steadier rain, with a chance of thunderstorms developing later in the day. Expect wet roads, reduced visibility, and slower travel across Pendleton, Hermiston, and along I-84.

Rain continues into Wednesday night, keeping conditions slick for early Thursday travel. Plan extra time for commutes and use headlights during heavier rain. While rainfall amounts are not extreme, consistent showers could lead to minor ponding in low-lying areas.

Thursday remains unsettled with a 70% chance of rain before gradual clearing begins later. Temperatures stay in the low 50s, reinforcing a cool, damp spring pattern across the region.

Looking ahead, drier and warmer weather returns by Friday into the first weekend of April, with highs climbing into the upper 50s and 60s. For now, midweek brings the most impactful weather.

Five Day Outlook for Pendleton, OR:

  • Today: Decreasing clouds, high near 50°F
  • Tuesday: Slight chance of rain, high near 53°F
  • Tuesday Night: Slight chance of rain, low near 37°F
  • Wednesday: Showers, high near 57°F
  • Thursday: Rain likely, high near 51°F