Highest temperature in NYC on August 9?

Platform comparison

Market context

The key real-world event is the **daily high temperature at LaGuardia Airport** on 9 August, with settlement tied to Weather Underground’s Daily Observations rather than the summary high/low panel. Polymarket’s live pricing currently puts **90–91°F** well ahead at 73%, with **92–93°F** next at 20%, so the market is leaning on a moderately hot outcome rather than an extreme heat spike.[1]

That distribution fits the wider August pattern for New York, where highs in the upper 80s and low 90s are common, but 95°F-plus outcomes are much less frequent. Recent model and station data also point to a warm day rather than a cool one: WeatherSpark showed KLGA near 88°F in the afternoon on 9 August, while AccuWeather’s August calendar listed 90°F for that date and 91°F for the following day.[2][4] Against that backdrop, the current 0% implied chance for an outcome outside the listed bands is best read as a pricing call that the observed maximum should land near the forecast consensus rather than break materially higher or lower.[1][2]

The main catalyst traders have been leaning on is the short-range temperature trajectory into the afternoon observation window, especially whether LaGuardia can convert a warm morning into a peak in the low 90s before marine air or cloud cover trims the upside. The National Weather Service’s New York forecast product shows the latest update cycle around the event window, which is the kind of dependency that can shift confidence quickly if guidance is adjusted.[12] In practice, the market should react most to same-day forecast revisions and any late-day heat-strengthening or cooling signal from the official station feed that feeds Weather Underground’s daily observations.[1][12]

Sources: 1 · 2 · 3 · 4 · 5

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 NYC on August 9? 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.

UK Frequently Asked Questions

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.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

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.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.