Highest temperature in Wellington on July 20?

Platform comparison

Market context

Wellington International Airport recorded a peak of 15°C today, confirming the current 0% probability for any outcome above the frontrunner of 12°C on Polymarket. Historical July data for the region typically sees highs between 8°C and 14°C, with extreme outliers rarely exceeding 16°C due to the city’s maritime climate and persistent south-westerly flows. The current crowd-implied probability of 0% for higher ranges aligns with these seasonal norms, as the 15°C reading sits just above the market’s leading 12°C bracket, suggesting the settlement will likely resolve within the lower-mid range rather than the upper extremes.

Traders should monitor the overnight weather trajectory and the final Wunderground daily report, which settles the contract at 12:00:00Z on 20 July 2026. While no specific crypto announcements directly influence this weather event, the broader macro environment—particularly BTC and ETH funding rates and whale flows—could impact capital allocation into low-volatility weather contracts on btc-prediction.bet. Recent data from Coinglass shows elevated short-term funding rates in ETH, potentially diverting liquidity from niche weather markets toward higher-beta crypto derivatives, though USDC settlement mechanics ensure this contract remains insulated from on-chain volatility.

Sources: 1 · 2

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.

FAQ

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 does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.