Portland

Portland Braces for Week of Showers and Thunderstorms, NWS Portland Advises

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Published on September 06, 2025
Portland Braces for Week of Showers and Thunderstorms, NWS Portland AdvisesSource: Tony Webster from Portland, Oregon, CC BY 2.0, via Wikimedia Commons

Portland residents should keep their umbrellas at hand as the National Weather Service in Portland forecasts a string of showers and possible thunderstorms for the coming week. The city currently sits under overcast skies with temperatures hovering at a cool 63°F and a relative humidity of 88%, according to the latest update from the NWS Portland Office. Despite the widespread haze that clouded this morning's commute, it's expected to clear before 8 am, giving way to mostly cloudy conditions.

As the day turns to evening, the weather pattern remains unstable. The characteristics of a typical Portland autumn present as the likelihood of showers and thunderstorms persists at about 50%. The temperature is expected to dip to a low of around 60 degrees with just a breath of variable wind. Residents planning nighttime outings might want to dress in layers and prepare for sudden weather changes.

Turning to Sunday's conditions, there's a continuing theme of cloud cover with a slight reprieve as skies are predicted to become sunny towards the afternoon and a high near 77° F in the forecast. However, this brief glimpse of sunlight will be short-lived as the NWS Portland reports "a 20 percent chance of showers after 11 p.m.," suggesting another potentially wet evening.

Come Monday, the showers are not merely likely but are accompanied by the possibility of thunderstorms developing after 5 pm. The area will experience mostly cloudy skies with a high near 71 and calm winds shifting to west southwest later in the day. This sets a precedent for Tuesday, where residents can expect more showers and the potential for a thunderstorm, as evidenced by the NWS Portland's declaration that the "chance of precipitation is 80%."

The remainder of the week continues this damp trend with varying chances of showers from Wednesday through to Friday. Temperatures will fluctuate slightly but stay within the comfortable zone of the upper 60s to high 70s. For those keeping an eye on the long-term conditions or planning future events, checking in with the NWS Portland website will offer the most current and accurate weather information.