Recent National Weather Service forecasts and ensemble model runs project daytime highs in the mid-60s Fahrenheit for Seattle on May 19, aligning with NOAA’s above-normal temperature outlook for western Washington through the month. This positioning stems from persistent offshore flow and reduced marine layer influence that has sustained warmth well above the 67°F May climatological average. Traders have assigned 96.5% implied probability to 58°F or higher because current guidance shows little room for significant cooling before the date. A rapid onshore shift or stronger low-pressure system could lower readings into the upper 50s, but such a change remains unlikely within the short forecast window.