Seattle High Temp May 26: Can 62-63°F Hold the Lead?

Seattle’s weather on May 26 is already being priced by the market, and the leading outcome is a high of 62-63°F. That bracket sits at 33% implied probability, making it the front-runner in a field of eleven possible temperature ranges. But 33% is not a comfortable lead. The market is pricing genuine uncertainty, not science.

The market question asks: what will the highest temperature in Seattle reach on May 26, 2026? The 62-63°F outcome is priced at $0.33 YES and $0.67 NO, with resolution set for May 26, 2026 at noon. Total volume across the market stands at $11,729, with $7,436 trading in the last 24 hours.

How the Seattle Temperature Contract Works

This contract resolves based on the highest recorded temperature in Seattle on May 26. YES pays out if the actual high falls within the 62-63°F band. NO pays out if Seattle’s high lands in any other bracket, from 55°F or below all the way up to 74°F or higher. The resolution source is market resolution, meaning the operator will confirm the high temperature reading at close.

• 62-63°F (YES): $0.33 implied probability of 33%
• All other outcomes combined (NO): $0.67 implied probability of 67%

A NO outcome here is broad. Seattle’s high landing at 60-61°F, at 64-65°F, or anywhere outside the 62-63°F window all pay out the same way. That structural breadth is exactly why NO carries a two-thirds implied probability even when 62-63°F is the single most likely outcome. The market is not saying Seattle stays cool. The market is saying the specific bracket is a coin flip with extra variance.

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Momentum and Market Signals

The trend score sits at 63.79, a mild bullish lean for the leading outcome. Hourly and daily price change data are not available for this contract, so the trend score is the primary directional signal. A score above 50 suggests modest positive momentum toward 62-63°F, likely driven by short-range forecast models updating as May 26 approaches.

Total volume is $11,729, with $7,436 changing hands in the last 24 hours. Liquidity stands at $39,425, which is healthy relative to volume and means a single large bet is unlikely to move the price dramatically. Volume is below $1M, which means price can still shift meaningfully if a weather data update or model run surprises the market before resolution tomorrow.

• The trend score of 63.79 points toward mild positive momentum for the 62-63°F bracket, consistent with current forecast models favoring a mild spring day in Seattle.
• 24-hour volume of $7,436 represents active trading, suggesting traders are watching short-range forecasts closely as the resolution date closes in.
• Liquidity at $39,425 is solid for a single-day weather market, reducing the risk of outsized price swings from thin order books.
• The 67% NO probability reflects the structural advantage of the combined field, not a strong directional bet against mild temperatures.
• Related markets show Seattle-adjacent weather and climate contracts active, consistent with a broader trader interest in near-term environmental outcomes.

Lines Analysis: What the Seattle Forecast Is Saying

Here’s what the measurements are telling us. Seattle’s late May climate normals put daily highs in the low-to-mid 60s. The 62-63°F bracket sits squarely in that historical sweet spot. When Pacific Northwest marine influence dominates, afternoon highs tend to cluster right in this range, which is why this outcome leads the field despite a crowded bracket structure.

The risk to the 62-63°F outcome is a nudge in either direction. A stronger marine push from Puget Sound keeps the high at 60-61°F or below. A break in cloud cover or a drier offshore flow pushes the afternoon reading into 64-65°F or higher. Seattle’s May temperatures are genuinely sensitive to cloud timing and sea breeze strength, and neither of those variables resolves cleanly until the morning of May 26. That’s the measurement gap the market is pricing.

• National Weather Service Seattle forecast updates through the evening of May 25 are the most direct repricing trigger for this contract.
• Model consensus from GFS and European ECMWF runs will tighten the forecast cone overnight, with any divergence between the two models a signal of heightened uncertainty.
• Morning surface observations at Sea-Tac Airport on May 26 will anchor the early trajectory of the afternoon high.
• Cloud cover timing in the early afternoon is the swing variable: a delayed marine layer clearing pushes the high lower, an early clearing pushes it higher.

Total volume of $11,729 reflects a market with genuine engagement but not deep conviction. The data favors 62-63°F as the modal outcome, but the margin is thin enough that a single updated forecast run could shift the price meaningfully before noon tomorrow. The data doesn’t care about the politics, and in this case, it also doesn’t care about the bracket structure. Seattle will hit whatever temperature it hits.

LINES VERDICT

LEADING BUT VULNERABLE

The 62-63°F bracket is the market’s best single guess for Seattle’s May 26 high, anchored by late-spring climate normals and mild marine influence. But 33% is a narrow lead in an eleven-outcome field, and overnight forecast updates carry real repricing power before noon resolution.

What the market says: 33% implied probability means traders rate this the most likely single outcome, but still give it only one-in-three odds. With resolution less than 24 hours away, any forecast shift tonight will move this price.

Key unknown: The National Weather Service Seattle afternoon forecast update on May 25 and early May 26 morning model runs are the single most important inputs. A model shift of even two degrees in either direction pushes volume into adjacent brackets and reprices the leading outcome.