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Highest temperature in Chengdu on July 31?

"Highest temperature in Chengdu on July 31?" on Polymarket, Kalshi and Is Kalshi Legal in California — what traders need to know about platform choice, KYC and tax law.

27°C 98% 28°C 4% 23°C or below 0% 24°C 0% Volume: $105K Liquidity: $89K Closes: 31 Jul 2026
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Highest temperature in Chengdu on July 31?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Is Kalshi Legal in California) Pick
polygram.ink (preferred broker)
98% 2% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Go to the live market →
Polymarket (direct)
polymarket.com
98% 2% 0% Geo-blocked in US/UK/EU USDC, on-chain Go to the live market →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Go to the live market →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Go to the live market →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Go to the live market →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
27°C98%
28°C4%
23°C or below0%
24°C0%
25°C0%
26°C0%
29°C0%
30°C0%
31°C0%
32°C0%
33°C or higher0%

Market context

The real-world event is the **highest temperature recorded at Chengdu Shuangliu International Airport Station on 31 July 2026**, as published by Wunderground for that day. Seasonal climatology makes the market sensitive to whether Chengdu gets a standard hot, humid summer afternoon or cloud and rain that cap the daily maximum; July forecasts in the results cluster around the low- to mid-30s Celsius, with some sources allowing brief spikes higher, but the resolution source will be the station’s observed maximum, not a city average or nearby forecast[3][4][6][15].

The current **0% YES** implies the crowd is assigning essentially no chance to the relevant temperature band, which is consistent only if the contract’s range is unusually high or if participants are pricing in a cooler day than most July norms suggest. Comparable Chengdu summer cases often settle around the low 30s Celsius because the city is warm, humid and rainy in July, but afternoon thunderstorms and persistent cloud can suppress the peak; that is why the market should be read against the station observation rather than broad weather summaries[6][12][19].

For accessibility, the key frictions are regulatory rather than meteorological. Under Germany’s **GlüStV**, prediction markets can fall within gambling rules and may be restricted or require local compliance depending on the operator’s licensing model, while the US **CFTC** can assert jurisdiction where a contract is treated as a derivative or event contract touching US persons or markets. A “**no-KYC up to $1,500**” policy usually means small accounts can trade or withdraw within that limit without full identity verification, which widens access for casual users but does not remove geoblocking, jurisdictional screening, or operator-side limits on participation in this specific market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Chengdu on July 31? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.

FAQ

Do I need to KYC for Is Kalshi Legal in California?
Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
Can I trade anonymously?
Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
What happens during a tax audit?
You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
Are prediction markets gambling?
Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
Is there a withdrawal cap?
No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
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