Highest temperature in Taipei on August 10?

Platform comparison

Market context

Taipei’s daytime peak on 10 August will be judged by the highest Celsius reading logged at Songshan Airport on Weather Underground’s Daily Observations table, so the key question is whether the city reaches the mid-30s rather than where the forecast screen initially sits. The market is currently priced at 0% YES, but that looks detached from the seasonal baseline: Taipei’s August average high is around 32.5–33°C, with typical 10 August highs near 33°C and a recorded record high of 38°C for the date.[2][8][12]

Comparable August cases suggest the distribution is usually concentrated around 33–35°C, with hotter outcomes dependent on sun before cloud build-up and whether showers arrive early enough to cap the afternoon maximum. Forecast services currently point to roughly 32.6–34°C for today, with overcast conditions and a t-storm risk later in the day, which matters because the resolution uses the single highest observed reading, not the day’s summary high/low panel.[2][4][5][7]

For traders, the main catalysts are the timing of Taipei’s morning warming cycle, any afternoon convection, and the first published observations at Songshan Airport, since revisions can still matter until the next day’s first datapoint appears. On-chain, settlement is in USDC, so the main market risk is not Bitcoin or Ethereum direction itself but wider crypto risk appetite affecting secondary pricing; if BTC and ETH funding stays elevated or whales rotate into event-driven alts, that can tighten spreads and move the implied probabilities even when the weather signal is unchanged.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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%.