Weather
Eastern Oregon Weather Alert: Lows Near 23, Snow Risk Oct 30-31
Pendleton, OR – Freezing nighttime temperatures and the possibility of rain mixed with snow could bring a noticeable change to eastern Oregon heading into Halloween weekend. After relatively mild afte
By Marcus Hale · 2026-10-25T11:12:27.892Z
Pendleton, OR – Freezing nighttime temperatures and the possibility of rain mixed with snow could bring a noticeable change to eastern Oregon heading into Halloween weekend. After relatively mild afternoons early in the week, Pendleton is expected to experience several nights near or below freezing, including a projected low of 28 degrees Wednesday night and an even colder 23 degrees Friday night. The National Weather Service also indicates rain and snow showers could develop late Friday and continue into Saturday, creating a potentially wintry start to November's approach.
According to the National Weather Service in Pendleton, temperatures will reach approximately 63 degrees Sunday, Oct. 25, following widespread morning frost and patchy fog. Conditions become cooler Monday, with afternoon temperatures reaching only 57 degrees and a 30% chance of showers. The changing pattern continues through the middle of the week, bringing intermittent precipitation chances and increasingly cold nighttime conditions.
Freezing Temperatures Become a Midweek Concern Wednesday, Oct. 28, marks an important transition as temperatures reach approximately 57 degrees before falling to around 28 degrees Wednesday night. A 30% chance of showers is forecast after 11 a.m., with another 30% chance of precipitation mainly after 11 p.m. Wednesday night. The combination of colder air and possible precipitation could make conditions uncomfortable for residents traveling or working outdoors during the late evening and early morning.
Thursday brings partly sunny skies, another chance of showers and a high near 54 degrees. Temperatures are expected to fall toward 31 degrees Thursday night, keeping the freezing temperature concern in place. While daytime conditions remain relatively mild, the repeated overnight drops could affect exposed vegetation, outdoor plumbing and temperature sensitive equipment, particularly in locations where freezing conditions persist for several hours.
Rain and Snow Chances Develop Before Halloween The most notable development in the extended forecast arrives Friday, Oct. 30, when afternoon temperatures are expected to reach only 50 degrees. Another chance of showers remains in the forecast before temperatures fall sharply to approximately 23 degrees Friday night. The National Weather Service specifically identifies a chance of rain and snow showers during that period, suggesting colder conditions could support mixed precipitation.
Saturday, Oct. 31, brings a slight chance of rain and snow showers, with mostly sunny skies otherwise expected and an afternoon high near 50 degrees. The forecast does not specify snowfall accumulations, and the possibility of mixed precipitation should not be interpreted as confirmation that accumulating snow will reach downtown Pendleton. Exact precipitation timing, amounts and surface conditions remain uncertain several days ahead.
Travel Conditions Could Change as Temperatures Fall Drivers using Interstate 84, U.S. Highway 395 and nearby rural roads should pay attention to nighttime temperatures, particularly where moisture remains on pavement. Freezing temperatures can create slick spots if wet surfaces cool sufficiently, especially on bridges, elevated roadways and shaded stretches. However, the supplied forecast does not confirm widespread icing, road closures or significant snow accumulation.
The colder conditions may also affect agricultural operations and outdoor activities throughout the Pendleton area and surrounding Umatilla County communities. Residents with sensitive plants should consider protective measures ahead of the coldest nights, while those planning Halloween events may want additional warm clothing. The temperature difference between Sunday's projected 63 degree high and Friday night's 23 degree low spans several days rather than representing a sudden temperature collapse.
Looking beyond Halloween, the combination of cold nights and intermittent precipitation suggests residents should continue monitoring forecast updates. The National Weather Service has not provided a confirmed snowfall accumulation forecast for Pendleton in the supplied outlook, making it important to distinguish the potential for snow showers from an established winter storm threat.
Will the possibility of freezing temperatures and rain snow showers change your Halloween weekend plans?
Five Day Weather Outlook Sunday 10/25: Widespread frost between 8 a.m. and 11 a.m. and patchy fog before 8 a.m. give way to partly sunny skies, with a high near 63 degrees and a nighttime low around 32 degrees; showers are possible late.
Monday 10/26: Mostly cloudy conditions bring a 30% chance of showers, with patchy fog before 11 a.m. and a high near 57 degrees; additional showers are possible after 11 p.m., with a low around 37 degrees.
Tuesday 10/27: Partly sunny skies return with a 20% chance of showers before 11 a.m. and an afternoon high near 59 degrees; Tuesday night becomes partly cloudy with temperatures falling to approximately 33 degrees.
Wednesday 10/28: A 30% chance of showers develops after 11 a.m., with partly sunny skies and a high near 57 degrees; another 30% chance of showers follows late Wednesday night as temperatures drop to around 28 degrees.
Thursday 10/29: Partly sunny skies and a chance of showers continue, with afternoon temperatures reaching approximately 54 degrees; Thursday night remains mostly cloudy with another chance of precipitation and a low near 31 degrees.
Extended Weather Outlook Friday, Oct. 30: Partly sunny skies and a chance of showers are expected, with a high near 50 degrees. Friday night turns considerably colder, with a low near 23 degrees and a chance of rain and snow showers.
Saturday, Oct. 31 — Halloween: Mostly sunny skies are expected with a slight chance of rain and snow showers and a high near 50 degrees. Snow accumulation amounts have not been provided, and the timing of any mixed precipitation remains uncertain.