Seattle July 3 High Temp: Can 72-73°F Hold at 37%?

Seattle’s July 3 high temperature is one of the trickiest short-range weather markets on the board. The 72-73°F band sits at 36.5% implied probability, making it the single most likely outcome across a ten-bracket field. That’s a meaningful edge over any one alternative, but it still means the market assigns nearly two-thirds probability to temperatures landing somewhere else entirely.

This market asks: will Seattle’s highest temperature on July 3 fall between 72 and 73°F? The YES price sits at $0.37 and NO at $0.64, with the contract resolving July 3, 2026 at noon local time. Total volume is $4,401, all of it placed in the last 24 hours, with $40,509 in available liquidity backing the order book.

How the 72-73°F Contract Works

Resolution turns on a single daily maximum reading for Seattle on July 3. The winning bracket is the one that contains the verified high temperature for the day. If the thermometer peaks anywhere other than 72-73°F, this contract pays NO.

• YES pays if Seattle’s July 3 high temperature lands at exactly 72°F or 73°F.
• NO pays if the high falls in any other bracket, from 63°F or below all the way up to 82°F or higher.

The NO case is structurally broad. Seattle’s July highs have historically ranged from the mid-60s to the upper 80s, and any meaningful deviation from the current forecast pushes this contract to zero. The 74-75°F bracket and the 70-71°F bracket are the closest rivals, meaning even a one- or two-degree forecast miss eliminates this position entirely.

Momentum and Market Signals

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The momentum composite points cautiously higher. The 72-73°F contract moved up 13% from its opening price on July 1, reflecting forecast convergence as numerical weather models updated. A 1.5% pullback in the last hour suggests some profit-taking or model spread widening. The trend score of 54.99 is modestly above neutral, consistent with a market in price discovery rather than strong conviction.

Total volume of $4,401 is thin. Liquidity at $40,509 is healthy relative to volume, which means the order book can absorb new positions without extreme slippage, but the low trade count means a single informed bet could reprice this contract sharply. Anyone with access to a high-resolution mesoscale forecast has a real edge here.

• The 1h price change of -1.5% after a 13% run-up since July 1 signals the market is reassessing as the forecast window tightens.
• All $4,401 in volume arrived in the last 24 hours, meaning price history before yesterday is noise.
• Liquidity at $40,509 is roughly nine times total volume, a ratio that keeps spreads tight but also signals limited participation so far.
• The trend score of 54.99 sits just above the midpoint, consistent with genuine uncertainty rather than directional conviction.
• The NO side holds 63.5% implied probability across all other brackets combined, reflecting how much variance exists in a ten-bracket temperature market.

Lines Analysis: Seattle Temperature Market

The case for 72-73°F rests entirely on forecast precision. Pacific Northwest July temperatures are strongly influenced by marine layer behavior and upper-level ridge position. A building ridge over the Pacific Northwest supports afternoon highs in the low-to-mid 70s, which aligns with the leading bracket. The National Weather Service Seattle office issues spot forecasts with roughly plus or minus two degrees of skill at 24-48 hours, which means the 72-73°F bracket sits squarely within the cone of the most likely outcome.

What makes NO real is the width of the alternative field. The 74-75°F bracket captures warmer scenarios where the ridge strengthens faster than modeled. The 70-71°F bracket captures cooler scenarios where marine influence persists longer into the afternoon. Either bracket pays NO holders on this contract. Temperature markets at this resolution are decided by forecast precision, not directional trend, and a two-degree bust in either direction is well within normal short-range forecast error.

• The NWS Seattle afternoon forecast update, due before resolution, is the single most important data point. Any change in the predicted high shifts bracket probabilities immediately.
• Upper-level ridge timing matters. A faster-building ridge pushes the high toward 74-75°F and drains this contract.
• Morning marine layer depth controls how quickly temperatures rise. Persistent low cloud delays afternoon warming and favors the 70-71°F bracket.
• Model spread between the GFS and European ECMWF for July 3 will narrow significantly by late July 2, giving late bettors an informational edge.
• Any convective development or unusual Pacific disturbance would be a wildcard that reprices the entire field downward.

Total volume of $4,401 is thin for a same-day weather market. The data currently favors 72-73°F as the single most likely bracket, but with 36.5% implied probability, the market is explicitly saying this is a coin flip with multiple competing outcomes. The 24-hour forecast window makes this contract highly sensitive to any NWS update before noon on July 3.

Narrow Favorite in a Wide Field

The 72-73°F bracket holds the highest single-outcome probability in a ten-way split, but nearly two-thirds of the market expects something else. The forecast window is tight enough that the next NWS update will matter more than anything else.

What the market says: At 36.5% implied probability, the market treats 72-73°F as the most likely single outcome while acknowledging that the July 3 resolution date leaves almost no time for the forecast to stabilize before settlement.

Key unknown: The NWS Seattle afternoon forecast update for July 3, expected late on July 2, is the single data release most likely to reprice this contract. A one-degree shift in the predicted high moves significant probability mass between adjacent brackets.