Widespread Showers Persist Across US Northwest, Midwest with No Major Weather Systems

Across various U.S. regions, unsettled weather patterns are bringing cooler temperatures and intermittent showers, though significant long-duration precipitation events are not expected. In Jackson, Wyoming, a gradual cooling trend with near-daily showers resembling May's weather pattern has been observed, with temperatures mostly in the 70s and little freezing so far this September. The Pacific Northwest, including Oregon, is experiencing a thick marine layer with low clouds leading to cooler days, but more sunshine and summer-like temperatures are expected over the weekend, along with beneficial rainfall for ongoing fires. Wisconsin is transitioning from showers associated with a weak low pressure system towards a return of summer warmth with highs climbing into the 80s by the weekend, accompanied by muggy conditions and minimal rain chances. In the Boston area, cooler temperatures below seasonal averages persist with spotty showers expected mainly near coastal areas, but a return to sunshine is forecast by Thursday as high pressure builds. Overall, the U.S. is seeing a mix of cooling trends and intermittent rain, but most areas will enjoy a return to warmer and sunnier conditions later in the week.