Highest temperature in Wellington on July 7?

Platform comparison

Market context

The 0% YES probability for a high temperature above typical ranges in Wellington on 7 July 2026 reflects the immediate reality of persistent light rain and southerly flow at Wellington International Airport, with current observations showing temperatures near 13°C and a moderate breeze. In the last 24 hours, cloud cover has remained thick, and light rain has continued through the night, suppressing any potential for a significant temperature spike as the day begins.

Historically, early July in Wellington sees daytime highs between 11°C and 15°C, with 6 July 2026 recorded as the warmest day in July at 17.8°C, while 22 July stands out as the coldest at 11.1°C. The current 0% probability aligns with these comparable cases, where outcomes above 16°C are rare and outcomes from 12°C to 16°C carry meaningful weight, making a high temperature above this range highly improbable under present conditions.

Traders should monitor NIWA’s seasonal climate outlook for May–July 2026, which indicates temperatures are about equally likely to be near or below average in the South Island, with occasional cold snaps possible under persistent high pressure. The outlook also notes a rapid transition toward El Niño conditions, which typically bring cooler, drier weather to the region, and forecast confidence for temperatures remains medium. Recent updates from the National Weather Service highlight heavy rainfall threats for the Mid-Atlantic and Northeast, but for Wellington, the focus remains on southerly-quarter flow anomalies and the likelihood of below-average temperatures as the season progresses.

Sources: 1 · 2 · 3 · 4 · 5

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.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.