Highest temperature in Manila on August 17?

Platform comparison

Market context

Manila's daily high temperature on 17 August 2026 will be measured at Ninoy Aquino International Airport and resolved against Weather Underground's Daily Observations table rather than the summary high-low display. The distinction matters: the granular observations record captures readings at specific intervals throughout the day, whereas summary sections sometimes smooth or round figures. For automated resolution workflows, this means querying Wunderground's historical data API directly rather than relying on parsed summary cards.

August sits within Manila's southwest monsoon season, when afternoon convection regularly pushes temperatures into the 30–34°C range. Historical August highs at the airport station typically cluster between 31 and 33°C, with excursions above 34°C occurring roughly once per decade during particularly intense heat episodes. The current 0% crowd probability suggests traders expect the market's upper threshold to fall well below historical norms—a positioning that warrants scrutiny against seasonal baselines and any anomalous atmospheric patterns developing in the weeks prior.

Traders monitoring this market should track Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) seasonal outlooks and any tropical cyclone activity in the western Pacific, as storm systems can suppress daytime highs significantly. Real-time feeds from Wunderground's API allow conditional orders to trigger on threshold breaches, though the 12:00 UTC settlement window (20:00 Manila time) means the final reading occurs after typical peak heating. Cross-referencing multiple station sources beforehand identifies whether Wunderground's airport sensor exhibits known drift or calibration quirks relative to other Metro Manila observations.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.