Highest temperature in Sao Paulo on May 22?

Platform comparison

Active sub-markets

Market context

São Paulo’s temperature on 22 May will be set by late-autumn conditions at Guarulhos airport rather than by any political event, with the market resolved from the day’s highest reading in Celsius. Long-run climate references for the city point to cool, fairly settled May weather: averages cluster around 17-23°C, with overnight lows near 14°C and monthly rainfall typically modest. That makes mid-20s a plausible ceiling in ordinary conditions, while anything materially above that would usually require an unusually warm air mass and limited cloud cover.

For comparison, the broader May pattern in south-eastern Brazil is usually benign enough that forecasts often sit in a narrow band, not far from climatological normals. Weather services quoted in recent monthly outlooks put São Paulo’s May highs around 22-23°C, which is broadly consistent with the city’s seasonal profile. In practical terms, the market is leaning on whether the day behaves like a standard dry-season shoulder-month session or whether warmth briefly spikes above average; the 0% implied chance of a very high outcome suggests traders expect little departure from normal.

The main catalyst to watch is the short-range forecast in the 48-72 hours before settlement, especially the position of cloud cover, rain bands and any passing frontal system over south-eastern Brazil. Recent national weather coverage has highlighted active rain and storm risk in other regions of Brazil, but São Paulo itself is more likely to be driven by local cloud and air-mass changes than by countrywide headlines. Traders should focus on official and commercial forecasts for the Guarulhos station, then on the day’s actual hourly readings, since the winning range will turn on the single highest printed temperature before the window closes at noon UTC.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Sao Paulo on May 22? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.