Portland Forecast: Cooler Weekend Ahead (July 2025)

The shift in Portland's weather is attributed to an upper-level low dropping south from Canada and an increase in onshore flow. This pattern will bring cooler air and morning clouds into the weekend.

Thursday saw highs near 90 degrees, but the gradual increase in onshore flow will reduce daytime high temperatures. Friday will remain sunny with highs near 87 degrees. Saturday will start with morning cloud cover, clearing to mostly sunny by the afternoon with highs around 80 degrees. Some areas of the Willamette Valley may stay cloudy longer with highs in the upper 70s.

Sunday will be cloudier, with a very slight chance of morning drizzle, clearing by the afternoon with highs around 80 degrees. Early next week is uncertain, with models showing either cloud cover and highs in the upper 70s or a weak system bringing light showers to western Oregon.

Fire conditions remain a concern, with the Burdoin Fire near Bingen experiencing breezy conditions and the Cram Fire near Madras expecting cooler temperatures but slightly weaker wind.

There is a slight chance of a light shower, particularly on Monday morning.

Highs will be in the 80s, a noticeable drop from the recent 90-degree temperatures.

An upper-level low dropping south from Canada and an increase in onshore flow.

Do you think this cooler weather pattern will last? Let us know! Share this article with others who need to stay ahead of this trend!