Highest temperature in Madrid on May 22?

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Market context

Madrid’s airport temperature later today will depend on whether the city gets another notably warm May afternoon or tops out closer to seasonal norms. The market is currently priced at 0% for the opening range, which suggests traders see little chance of an extreme outcome at Adolfo Suárez Madrid-Barajas by the noon settlement window. That is consistent with Madrid’s usual May profile: the month is generally warm but not midsummer-hot, with average highs around the low 20s °C and typical daily highs often sitting well below the levels seen in July and August.

Comparable cases point to why single-day temperature markets can shift quickly but still usually resolve within a fairly tight band. WeatherSpark’s long-run Madrid data shows May highs commonly rising from the high teens into the upper 20s °C, with only occasional spikes into the 30s. The city’s all-time record of 40.7°C, set in July 2022, is a reminder that Madrid can run very hot, but that kind of heat is not the base case in late spring. For a midday airport reading, the key question is whether sunshine and dry inland air are enough to push the day’s peak materially above the recent May average.

The catalyst to watch is the final Wunderground observation for Madrid-Barajas as the day progresses, rather than any political-style event schedule. Traders are effectively leaning on the latest forecast guidance and the airport’s hourly temperature path, especially whether the warmest reading lands before the 12:00 UTC settlement cut-off. AccuWeather’s May outlook for Madrid still points to highs mostly in the 20s °C, while recent observations from the Met Office can help judge whether the air mass over central Spain is running warmer or cooler than normal.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Madrid on May 22? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. PolyGram routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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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.

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Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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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.