Highest temperature in Wellington on July 7?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 7 July 2026, with current crowd-implied probability of 0% for a specific outcome. Historical data confirms July is Wellington’s coldest month, averaging a high of 54°F (14°C) and a low of 47°F (8°C)[5]. Recent observations on 7 July 2026 show light rain, strong south-westerly winds at 24 mph, and a high of exactly 14°C, matching the seasonal norm[2][4]. A similar market on 5 July 2026 resolved to 14°C, reinforcing that 14°C is the statistically dominant peak for early July in this location[1].

Traders should monitor Wunderground’s hourly updates for 7 July, as the resolution source is the station’s daily maximum temperature from that platform[3]. No major weather announcements are scheduled, but the persistent light rain and cloud cover seen today suggest temperatures will remain capped near 14°C, with little chance of exceeding it[4][10]. Platforms diverge significantly here: Polymarket uses decimal odds and lower fees with minimal KYC, while Kalshi and Betfair rely on implied probability, enforce stricter KYC, and charge higher fees, affecting liquidity on this niche weather contract. Smarkets offers a middle ground with competitive fees but still requires identity verification. These structural differences mean the same 0% probability may reflect varying risk premiums across books.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Wellington on July 7? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative UK has a different geo footprint and routes to Polymarket's order book at 0% fees.