Highest temperature in Atlanta on July 13?

Platform comparison

Market context

On 13 July 2026, the highest temperature recorded at Atlanta's Hartsfield-Jackson International Airport will fall into one of several defined ranges. The settlement hinges on data from Weather Underground's historical records for that specific station, which serves as the official observation point for the metropolitan area. The 0% crowd probability suggests traders are either uncertain about range definitions or awaiting clarity on which temperature bracket the market operator has listed as the primary outcome.

Atlanta's July climate is consistently hot and humid, with historical highs typically ranging from 88°F to 92°F. The National Weather Service records show that 13 July has seen temperatures between 85°F and 94°F over recent decades, making mid-range outcomes (88–92°F) statistically most probable. Kalshi and Polymarket may diverge on how they've structured the temperature bands—Kalshi's binary YES/NO format differs from Polymarket's multi-outcome approach, affecting how traders express conviction. Betfair's decimal odds presentation can obscure implied probabilities for weather markets compared to Smarkets' fractional display, potentially explaining why the crowd hasn't yet priced meaningful probability into any specific range.

Traders should monitor the National Weather Service's 10-day forecast as mid-July approaches, particularly any heat advisories or ridge-building patterns that could push temperatures above seasonal norms. Atmospheric conditions in late June will signal whether tropical moisture or dry continental air dominates the Southeast. The settlement window closes at 12:00 UTC on 13 July, requiring traders to account for the afternoon peak temperature window when Atlanta typically records its daily high.

Methodology

We read Highest temperature in Atlanta on July 13? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.