Highest temperature in Wellington on July 23?

Platform comparison

Market context

The highest temperature at Wellington International Airport on 23 July will be set by a cool, showery winter airmass rather than anything remotely hot. Live forecasts early in the day were clustering around 10°C with patchy light rain, while other public forecasts showed similar readings near 10°C, steady pressure and a northerly breeze, which keeps the ceiling for the day firmly in single digits to low teens rather than in the upper ranges that would matter for a higher band settlement.[1][2]

That makes the current 0% implied probability on the top-end band consistent with Wellington’s July climatology: average highs around 12°C, lows near 9°C, frequent rain and breezy conditions are normal for the month.[3] For a market settled on the day’s maximum at Wellington Intl Airport Station, the relevant comparison is not whether it is cold, but whether an unexpected north-westerly surge or sunshine break could lift the airport reading above the usual July envelope; based on the available forecasts, that looks unlikely.[1][2][3]

For traders, the main catalysts are the intraday updates from the airport station itself and any late-shifting weather band crossing the lower North Island, because those can move the recorded maximum even after the morning starts cool. In prediction-market terms, settlement is in USDC and the on-chain price is effectively a consensus view on a single printed temperature, so the only real drivers are the final Wunderground history reading and any short-lived spike in local warmth before midday UTC closes the window.[1][2]

Sources: 1 · 2 · 3 · 4

Methodology

This page reads Highest temperature in Wellington on July 23? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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.

FAQ

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.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.