Official National Weather Service forecasts for Seattle on June 12 point to sunny skies and highs in the low-to-mid 70s as an upper-level ridge builds offshore, strengthening easterly flow and suppressing the typical marine layer. This setup favors temperatures clustering near 72–75°F, aligning with the closely matched leading market outcomes at roughly 28% each. Subtle model differences in ridge timing and boundary-layer mixing create the narrow spread between those bins, while climatological June averages near 70–74°F provide context for the modest upside risk above 76°F. Updated model runs and afternoon observations tomorrow will refine the exact peak before resolution.