Highest temperature in Seattle on July 23?

Platform comparison

Market context

Seattle’s July climate usually tops out around 75°F, so a mid-70s or low-80s reading at Sea-Tac is the baseline rather than an outlier. Wunderground’s settlement source is the Seattle-Tacoma International Airport station, and the NOAA time-series page shows the same station is the standard official reference point for daily temperature data.[2] That makes this a single-day, station-specific weather outcome rather than a citywide average, so even a warm Seattle afternoon can settle into a lower range if the airport peak arrives modestly.

The current **0% YES** crowd signal is best read against Seattle’s normal July pattern, which is typically warm by day but not extreme, with average highs near 75°F and only limited rainfall.[1] In comparable summers, outcomes above the upper 80s are rare enough to stand out, while highs in the 70s and low 80s are the default case.[1] That framing explains why the market is effectively leaning on a “normal July day” catalyst rather than a heatwave scenario.

Traders should watch for any late-season Pacific Northwest heat advisories or model shifts that push inland warmth towards the coast, because the market will move on the expectation of the day’s maximum at Sea-Tac, not on broader Seattle weather commentary. Recent Seattle reporting has shown how quickly forecasts can reprice when high pressure intensifies, with one heat event pushing the region into the 80s and 90s and triggering advisories.[4] For this contract, the key catalyst is whether forecast guidance starts to favour a brief warm-up that can lift the airport high into a higher settlement bucket; absent that, the market is leaning on seasonality and the station’s usual July ceiling.[1][4]

Sources: 1 · 2 · 3 · 4

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Seattle on July 23? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.