Madrid July 2 High Temperature: Will 35°C Win?

Madrid’s daily high temperature is one of the most tradeable weather outcomes in prediction markets, and right now the market is split nearly down the middle. The 35°C outcome sits at 48.5% implied probability, making it the modal outcome in an eleven-way market, but just barely below even-money. That tension is the story here: one city, one afternoon, eleven possible outcomes, and a forecast window that could shift everything before tomorrow noon.

The market question asks for the highest temperature in Madrid on July 2, 2026, resolving at 12:00 UTC. The 35°C outcome trades at $0.49 YES and $0.52 NO. Total volume across the market stands at $57,651, with $51,254 of that moving in the last 24 hours alone. The resolution date is July 2, 2026.

How the Thirty-Five Degree Contract Works

This contract pays out if and only if Madrid’s official peak temperature on July 2 lands exactly at 35°C. AEMET, Spain’s national weather agency, provides the authoritative temperature records for Madrid. Resolution depends on the confirmed daily maximum from AEMET’s Madrid observation network.

• YES at $0.49 (48.5%): Madrid’s highest reading on July 2 reaches exactly 35°C.
• NO at $0.52 (51.5%): Madrid’s peak temperature lands at any other value: 34°C, 36°C, or any of the nine other outcomes in this market.

A NO outcome here does not mean cooler weather wins. The temperature could finish at 36°C or 37°C and NO still pays. The 35°C contract loses any time the actual high lands in a different bucket, whether hotter or cooler. In a multi-outcome structure like this, NO is always the mathematical favorite for any single outcome, even the most likely one.

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Momentum and Market Signals: Late-Breaking Forecast Moves

The composite momentum signal is weakly bearish for the 35°C outcome. A 3% one-hour decline combined with a 1% 24-hour decline and a trend score of 46.82 (below neutral 50) all point in the same direction: traders are moving probability away from exactly 35°C. The driver appears to be updated forecast data. AEMET and European models typically refresh their 72-hour Madrid forecasts in the late afternoon, and the June 30 price action shows a sharp 12.5% drop followed by a partial 6% recovery, a classic pattern when new model output shifts the temperature distribution toward an adjacent bucket.

Total volume of $57,651 is thin. At this level, a single large trade can move the price meaningfully. The $51,254 that traded in the last 24 hours represents nearly 89% of all volume in this market, which tells you this market came alive only recently, likely as the forecast window tightened. Liquidity stands at $40,346, which is substantial relative to total volume and means the order book has real depth. Still, with total volume well below $1 million, price can shift sharply on any new AEMET bulletin or model update before resolution tomorrow.

• 1h change of -3% and 24h change of -1% confirm the current drift is away from the 35°C bucket, likely reflecting a forecast nudge toward 34°C or 36°C.
• AEMET’s Madrid station records the official daily maximum, and any afternoon forecast update could reprice this market before the July 2 window closes.
• The June 30 volatility pattern (sharp drop then partial recovery) suggests the market is actively repricing as European ensemble models update their Madrid projections.
• Trader sentiment is nearly split at 48.5% YES versus 51.5% NO, confirming no strong directional conviction at current prices.
• Open interest at $0 means no unresolved positions are carrying overnight risk in the traditional sense, and the market is entirely driven by recent spot trading.

Lines Analysis: What the Forecast Distribution Is Saying

Madrid’s early July climatology anchors the base case near 33°C to 36°C for typical years, with the distribution skewing hotter during active heat ridge patterns over Iberia. The 35°C outcome captures the center of that climatological range, which explains why it holds the plurality of probability across eleven outcomes. AEMET’s synoptic forecasts for early July 2026 will determine whether the European ridge is positioned to push Madrid above or below that central bucket. If the 500hPa ridge sits directly over the Iberian Peninsula on July 2, the distribution shifts toward 36°C, 37°C, and higher. If Atlantic troughing keeps the ridge displaced westward, 33°C or 34°C becomes more likely.

The risk to the 35°C position is not a cool day. It is a hot one. Madrid hit 42°C during the June 2019 heat wave and has recorded multiple July events above 40°C in recent years. A ridge intensification scenario would pull probability from the 35°C bucket toward higher outcomes. The current momentum signal suggests that is exactly what some traders are pricing in: the 3% one-hour drop implies money is flowing toward adjacent buckets, not toward cooler outcomes.

• AEMET’s next forecast bulletin for Madrid, expected before resolution, is the single most important data point. Any shift in the predicted daily maximum changes the probability distribution across all eleven outcomes simultaneously.
• European Centre for Medium-Range Weather Forecasts ensemble output for July 2 will show whether the Iberian heat ridge is strengthening or weakening through tomorrow afternoon.
• If AEMET issues a heat warning for Madrid on July 1 or July 2, probability mass will shift quickly toward the 37°C, 38°C, and higher buckets.
• A cooling scenario driven by Atlantic advection would move probability toward the 33°C and 34°C outcomes, also away from 35°C.

Total volume of $57,651 tells you this is a short-duration weather market with active but limited participation. The data right now slightly favors the NO side for the 35°C contract, but that reflects the math of multi-outcome markets as much as any strong directional call. The next AEMET forecast update is the catalyst that will settle this.

LINES VERDICT

NARROW MODAL OUTCOME IN A CROWDED FIELD

The 35°C bucket holds the most probability of any single outcome in this market, but in an eleven-way race, that still means NO is the marginal favorite. The recent momentum shift suggests traders are repricing toward adjacent temperature buckets as the forecast window tightens.

What the market says: At 48.5% implied probability, the market treats 35°C as the single most likely outcome but not a confident bet. With resolution less than 24 hours away and thin total volume, any updated AEMET forecast or model shift could swing this price by five to ten percentage points before the July 2 window closes.

Key unknown: The AEMET official forecast for Madrid’s July 2 daily maximum, expected to update within the next 12 hours, is the single data release that will reprice this contract. If it lands squarely at 35°C, expect YES to recover toward 55%. If it points to 36°C or higher, the adjacent buckets will absorb the probability mass.