WON climate

Will the maximum temperature be 57-58° on Apr 11, 2026?

The Setup

The market asks if Seattle's high temperature today will land in the narrow 57-58°F bin. While this aligns perfectly with the historical average of 57.5°F, an incoming cold front and persistent rain have pushed official forecasts down to 55-56°F. This creates a compelling opportunity to fade the climatological norm based on real-time meteorological data.

With the NWS forecasting a high of just 56°F and rain suppressing afternoon heating, Seattle is highly unlikely to thread the needle into this narrow 57-58°F bin.

Market

72c

Our Estimate

78-93c

Edge

+14c

Bull Case

The consensus among meteorological models places today's high temperature safely below the target bin. The official National Weather Service (NWS) point forecast for Seattle-Tacoma International Airport (KSEA) predicts a high of 55-56°F. Local forecasts from King5 and Wunderground are even more conservative, calling for highs of just 54°F. This cooler outlook is driven by an incoming cold front bringing widespread rain and low ceilings to the Puget Sound region. The NWS Area Forecast Discussion notes that rain will persist through at least 3:00 PM PDT. This prolonged precipitation will evaporatively cool the lower atmosphere and severely limit the solar insolation needed to drive temperatures up. Furthermore, the temperature at exactly midnight PDT was 53.1°F, eliminating the risk that the daily high was already set by carryover warmth from yesterday. Finally, narrow 2-degree bins are inherently fragile. Even if the temperature manages to overperform the 56°F forecast due to late-afternoon clearing, it must thread the needle perfectly. A minor mesoscale variation could easily cause the temperature to stall at 56°F or overshoot to 59°F, both of which result in a NO resolution.

Bear Case

The strongest argument for a YES resolution is historical climatology. The average high for Seattle on April 11 is 57.5°F, placing the long-term mean directly within the market's target bin. Climatological persistence often acts as a powerful anchor in weather markets, and models can sometimes overcompensate for incoming cold fronts. Alternative private forecasts suggest the target bin is still in play. AccuWeather's April 11 outlook specifically calls for a high of 58°F, indicating that some models see enough residual warmth from Friday's 68°F peak to sustain a higher temperature. If the rain devolves into scattered showers earlier than the NWS-predicted 3:00 PM window, the strong mid-April sun could cause rapid temperature creep. A late-afternoon sunbreak can easily add 2 to 3 degrees to the daily maximum, pushing a 55°F forecast straight into the 57-58°F range.

What Could Go Wrong

IF the rain ends and cloud cover clears by early afternoon instead of 3:00 PM PDT, THEN strong solar heating could rapidly push the temperature into the 57-58°F bin. IF the cold air mass associated with the upper-level low is shallower or arrives later than modeled, THEN residual warmth from the previous day could keep the baseline temperature high enough to reach 57°F despite the clouds.

Get picks like this daily

Full analysis delivered to your inbox every morning at 7:00 a.m. ET.

Start Free Trial