Latest National Weather Service and model guidance points to a Seattle high temperature near 62°F on May 17, with light onshore flow and scattered showers keeping readings from climbing much higher. This consensus has concentrated trader capital on the 62-63°F outcome at 38 percent implied probability, followed closely by 60-61°F at 26.5 percent, while the 64°F-or-higher band sits at 23 percent amid modest upside risk if clouds clear earlier than expected. Mid-May climatology for the region typically features highs in the upper 50s to low 60s under maritime influence, and current sea-level pressure patterns show no strong offshore warming to push values well above 63°F. The market remains sensitive to any final forecast adjustments overnight, as even a one-degree shift in the official Seattle-Tacoma International Airport observation could reprice the leading ranges before resolution.