Portland

Portland's Weather Rollercoaster: From Sunny Highs to Rainy Nights, NWS Forecasts a Mixed Bag

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Published on September 11, 2025
Portland's Weather Rollercoaster: From Sunny Highs to Rainy Nights, NWS Forecasts a Mixed BagSource: Google Street View

The National Weather Service in Portland has issued an update for the local weather forecast, providing Portlanders with a snapshot of the week's climate expectations. The overcast but relatively temperate conditions presently hovering over the city at 62°F are set to shift, bringing a range of weather variations in the coming days.

Today's outlook, as reported by the NWS, projects partly sunny skies with a comfortable high nearing 74 degrees and a continuation of light north northwest winds. It's a subtle transition into the evening as temperatures are expected to descend slightly, settling around 57 degrees under partly cloudy skies. Lack of significant wind change marks the calm before a warmer day.

Escalating gradually, Friday and Saturday are forecasted to be mostly sunny with highs of 75 and 80 degrees, respectively. The weather appears to be on the side of those wishing for a bit of warmth as calm, north breezes prevail. However, come Saturday night, the certainty of dry grounds begins to dampen. The likelihood of rain increases to 60%, signaling a change of plans for any late-night ventures.

According to the NWS forecast, Sunday brings a 70% chance of continued rainfall, and temperatures will reflect the unsettled skies with a high around the 70-degree mark. The approach of the new week seems to promise a respite; Monday's partly sunny ambience precedes what's expected to be a sunny week ahead, with temperatures climbing to the low 80s by Tuesday. Residents might embrace the relief of a mostly clear Monday night, as the mercury drops to a moderate 54 degrees.

The rhythm of the weather takes another turn by the following weekend. Saturday night's clouds foretell the arrival of rain, which is likely to persist into Sunday. But the skies practice restraint, offering Portland a chance of showers early into Sunday night before parting to a partly cloudy closure. The fluctuating cadence of sunshine and rain encapsulates the characteristically unpredictable Pacific Northwest weather, leaving little surprise in its wake.