Rain Likely in Boston on September 21, 2026
According to the National Weather Service (NWS) and the NWS Daily Climate Report (CLI), there is a possibility of measurable precipitation in Boston, MA, on September 21, 2026. Measurable precipitation is defined as 0.01 inches or more of liquid-equivalent rainfall. The observation period for this forecast is from midnight to midnight local standard time. The final determination of whether measurable precipitation occurs will be based on the NWS CLI report, which is expected to be published by 2:00 PM ET on September 22, 2026. This forecast is part of a broader weather pattern influenced by a stalled frontal boundary and a surge of moisture over the eastern and central United States, which is expected to bring scattered showers and thunderstorms to the mid-Atlantic and Northeast regions.
