Highest temperature in Istanbul on July 22?

Platform comparison

Market context

Istanbul Airport’s hottest reading on 22 July 2026 will be determined by the NOAA time-series table for LTFM, with the market settling on the temperature band that contains the single highest **Temp** value posted for the day. In practical terms, this is a late-day weather outcome, because the contract cannot resolve until NOAA publishes the first data point for the following date, so traders are still exposed to any late-afternoon or evening warming that makes the day’s maximum. The current crowd price of **0% YES** on the broader question is not a useful guide to the actual thermal outcome here; the relevant comparison is the band distribution, where Polymarket is already heavily concentrated on **31°C** at **90%**, with **32°C** at **10%**.[1]

For context, Istanbul’s July climate is typically warm rather than extreme, with an average daily high around **29°C** and clear or mostly clear conditions common across the month.[2] That makes a low-30s print plausible, but it also means the market is less about a rare heatwave than about whether the airport’s peak lands just above the seasonal mean. Compared with Betfair or Smarkets, where users usually read conventional decimal odds and may face different margin and fee treatment, Polymarket’s displayed probabilities map more directly to implied chances. Kalshi also quotes probabilities, but access, KYC reach and available market structure differ by venue, so the same weather view can trade at different prices across books even when the underlying NOAA resolution rule is identical.[1][2]

The main catalyst is simply the realised temperature profile at Istanbul Airport between now and NOAA’s final publication for the day. Any shift in local cloud cover, wind or afternoon sunshine could move the highest reading from 31°C to 32°C, which is the only meaningful dispute in the current book.[2] If you are comparing venues, the trader-facing differences matter most here: Polymarket shows the clearest probability split, while traditional books may embed vig differently and can reprice more slowly around a narrow, weather-specific band.

Sources: 1 · 2

Methodology

This page compares Highest temperature in Istanbul on July 22? 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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

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. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.