Highest temperature in Guangzhou on July 4?

Platform comparison

Market context

On 4 July 2026, the highest temperature recorded at Guangzhou Baiyun International Airport will determine the outcome of a prediction market focused on extreme summer heat in southern China. Historical data shows that July is Guangzhou’s hottest month, with average daily highs near 33°C and temperatures rarely dipping below 29°C [2][4]. Recent reports from Reddit confirm that current conditions in Guangzhou already exceed 30°C, with intense heat causing significant discomfort even indoors [7]. Despite this, the crowd-implied probability for a 31°C outcome sits at 0%, suggesting the market may be underweighting climatology in favour of short-term weather signals like monsoon positioning [8].

Traders should monitor upcoming meteorological announcements and monsoon forecasts, as these are the primary catalysts that could shift temperature expectations. The Met Office currently predicts an 80% chance of rain and a maximum “feels like” temperature of 32°C for Guangzhou, which could suppress peak highs if sustained [9]. Additionally, AccuWeather’s 2026 forecast indicates daily highs ranging from 87°F to 100°F (30.5°C to 37.8°C), reinforcing the likelihood of hotter outcomes than the market currently prices [3]. The market’s book depth is closely tied to funding flows from payment rails such as Klarna and SEPA; increased deposit activity via these channels often correlates with sharper price adjustments as liquidity enters the book.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Guangzhou on July 4? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

How fast is SEPA deposit?

SEPA Instant: under 10 seconds. SEPA Standard: 1-2 business days. Both accepted fee-free; the internal USDC conversion runs automatically once EUR lands in the platform account.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

What's the minimum deposit?

10 EUR / 10 USD equivalent. No upper limit, but deposits over $1,500 lifetime volume trigger a quick KYC flow (typically 5-10 minutes).

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).