Seattle May 27 High Temp: Can 72-73°F Hit?

Seattle’s weather on May 27 is already priced as a toss-up with a lean toward the cooler side. The 72-73°F band carries a 33% implied probability, making it the leading single outcome in a market spread across eleven temperature ranges. But at 67% against, traders are telling a clear story: most of the probability mass sits outside this narrow two-degree window.

The market question asks for the highest temperature recorded in Seattle on May 27, 2026, resolving at noon that day. The 72-73°F outcome is priced at $0.33 YES and $0.67 NO. Total volume stands at $4,074, with $4,056 of that arriving in the last 24 hours. Liquidity sits at $31,070 against a resolution date of May 27, 2026.

How the Seattle Temperature Contract Works

This contract resolves YES if Seattle’s official high temperature on May 27, 2026 lands between 72°F and 73°F inclusive. Resolution is based on official weather station data for Seattle. Every other outcome range resolves NO for this specific contract.

• YES ($0.33, 33% probability): Seattle’s May 27 high temperature reaches 72°F or 73°F.
• NO ($0.67, 67% probability): Seattle’s May 27 high temperature falls outside the 72-73°F band, landing anywhere from 59°F or below to 78°F or higher.

The NO outcome covers a wide range of possibilities. Seattle misses this band by running cooler, which is statistically more common in late May, or by spiking warmer into the 74-75°F or higher brackets. A marine push or low-pressure system arriving May 26 overnight would drop the high well below 72°F. A strong inland flow could push it above 73°F. The two-degree target window is narrow, and that narrowness is exactly why 67% of market probability sits against it.

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Momentum and Market Signals

The trend score of 54.07 suggests mild bullish lean on this outcome, but with no meaningful 1-hour or 24-hour price change to anchor that signal to a specific catalyst, the trend reads as noise rather than conviction. The volume pattern is more telling: nearly all trading arrived in a single 24-hour window, suggesting this market opened recently and attracted immediate attention rather than building over time.

Total volume of $4,074 is thin by prediction market standards. Liquidity at $31,070 is notably deeper than volume, which means the order book can absorb moderate trades without sharp price movement. Still, at this volume level, a single well-capitalized trade could shift the YES price meaningfully before the May 27 resolution.

• The 33% YES price reflects the narrow two-degree window in a market with eleven competing outcomes, not a bearish read on Seattle warming.
• The 24-hour volume of $4,056 versus $4,074 total shows this market is essentially brand new, with almost all positioning happening in one session.
• Liquidity at $31,070 is healthy relative to volume, limiting the risk of manipulation, but thin total volume means price discovery is still early.
• No whale trades have printed in this market, so directional lean comes from the aggregate order book rather than large single positions.

Lines Analysis: Seattle’s Late-May Temperature Window

Seattle’s late May climatology supports temperatures in the 60s and low 70s as the most likely range. The Pacific Northwest typically sees its first sustained warm stretches in June, not late May. A reading of 72-73°F on May 27 would represent a warm but not unusual late-spring day. The National Weather Service’s Seattle forecast office publishes updated guidance every six hours, and the 48-to-72-hour forecast window covering May 27 will be the primary price mover for this contract before resolution.

The 33% probability for 72-73°F is reasonable given the spread across eleven outcomes. The market is pricing uncertainty, not science. Seattle’s May 27 high temperature in any given year can fall anywhere from the upper 50s to the low 80s depending on synoptic pattern. No single two-degree band should carry dominant probability. The competing outcomes at 70-71°F and 74-75°F likely carry similar or higher probability given their adjacency to the target range, meaning the market has spread its bets rationally across a cluster of plausible outcomes.

• National Weather Service Seattle 48-hour forecast: the single most important input before resolution. A forecast of 71°F or 74°F shifts probability away from this band directly.
• Marine layer behavior on May 26 overnight: persistent marine push suppresses May 27 highs into the mid-60s, collapsing YES probability here.
• Offshore high-pressure ridge development: any forecast showing inland flow or ridging would push probability toward the 74-75°F and higher bands instead.
• Morning temperature on May 27: if Seattle reaches 65°F by 10am local time, the 72-73°F band becomes a live target rather than speculative.

The data doesn’t care about the politics of whether Seattle gets a warm day. Here’s what the measurements are telling us: a 33% probability for a two-degree band is structurally coherent in an eleven-outcome market. Total volume of $4,074 is too thin to draw strong conclusions from order book positioning alone. The next 18 hours of NWS forecast updates are the only meaningful catalyst before this contract resolves.

LINES VERDICT

MARKET UNCERTAINTY, NOT DIRECTIONAL CONVICTION

The 72-73°F band carries 33% probability because it is the single most-traded outcome in a rational spread across eleven possible ranges. The market is pricing uncertainty, not science, and the forecast data in the next 18 hours will do more work than any current order book signal.

What the market says: A 33% implied probability places 72-73°F as the modal outcome in a multi-way market, but two-thirds of probability sits elsewhere. With resolution at noon on May 27, any NWS forecast update between now and then can shift this price sharply given the thin $4,074 total volume.

Key unknown: The National Weather Service Seattle 48-hour point forecast for May 27, expected to update multiple times before resolution, is the single data point that will determine whether 72-73°F remains the leading outcome or cedes probability to adjacent temperature bands.

Scientific Context: Seattle Late-May Temperature Patterns

Seattle’s average high temperature in late May sits in the mid-60s Fahrenheit, based on historical station records. A reading of 72-73°F represents roughly six to eight degrees above the climatological average for the date, placing it in the warm-but-attainable category rather than extreme territory. The city’s proximity to Puget Sound means marine influence can suppress afternoon highs dramatically even when inland areas warm. Year-to-year variability in late May is high, making precise two-degree forecasts genuinely uncertain even 24 hours out. The outcome that closes this contract will be determined by synoptic-scale pattern, not long-term climate trend.

How does the 33% probability translate to a bet?

A 33% implied probability means the market estimates roughly a one-in-three chance Seattle’s May 27 high falls in the 72-73°F window. It is the leading single outcome in a spread across eleven ranges.

What pays out on the NO contract?

The NO contract pays if Seattle’s official May 27 high falls outside 72-73°F, landing in any of the ten other temperature bands from 59°F or below to 78°F or higher.

What data event would move this price most?

The National Weather Service Seattle point forecast for May 27, updated every six hours, is the primary catalyst. A forecast of 71°F or 74°F shifts probability out of this band immediately.

When does this contract resolve?

Resolution is set for May 27, 2026 at noon. The official high temperature for Seattle on that date, drawn from weather station records, determines the outcome.

Is the $4,074 volume enough to trust the price?

Volume is thin. Liquidity at $31,070 supports the order book, but the low total volume means a single large trade could move the YES price sharply before resolution. Treat current pricing as early-stage rather than settled consensus.