Highest temperature in Wellington on August 4?

Platform comparison

Market context

Wellington has started the new week with a typical winter setup: temperatures near 10°C, cloud, and breezy conditions have been the dominant pattern in recent observations, with the local forecast also keeping daytime highs in the single digits to low teens. That matters for this market because the settlement looks at the *highest* temperature reached at Wellington International Airport, not the day’s average, so any brief afternoon clearing or downslope warmth is what can lift the reading into a higher bracket.[7][9]

August is usually one of Wellington’s cooler months, with long-run guides putting daytime highs around 11-12°C and lows near 8-9°C, plus regular rain and wind.[2][4][11] Recent August-era daily forecast examples for New Zealand’s lower North Island show outcomes mostly clustered in the low teens, with occasional clearer days pushing slightly higher, which makes the current 0% YES probability look like a signal that traders expect no unusual warmth at the airport site rather than a view that zero is meteorologically impossible.[3][8]

The main catalysts to watch are the short-range forecast updates and any change in wind direction, cloud cover, or rainfall timing, because these can change the afternoon maximum even when the morning starts cold.[7][9] For a station-based market, the crucial dependency is the final Wunderground airport observation for the day, so late shifts in local conditions matter more than broader city forecasts.[16]

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.