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Highest temperature in Madrid on August 19?

Weather · Polymarket · Called NO, verified LOSS · Aug 19, 2026
View the original Polymarket market →
Verified Outcome
LOSS
PillarLab called 36°C will NOT win (NO @ 26%).
Result: 36°C won. The call was wrong.
Analyzed: Aug 19, 2026, 12:25 PM UTC
Market resolved: Aug 19, 2026, 10:27 PM UTC
Called 10h before resolution. The call was made before the outcome was known.

https://polymarket.com/es/event/highest-temperature-in-madrid-on-august-19-2026

PillarLab
📡 Fetching Polymarket data...
PillarLab
✅ Got data from Polymarket API!0.3s
PillarLab
🔍 Step 1: Detecting market type and category...
PillarLab
✅ Category: 🌦️ WEATHER ✅ Type: MULTI_CANDIDATE 📊 Market: Highest temperature in Madrid on August 19? 📅 Date: 2026-08-19T12:00:00Z 💰 Volume: $59,558 Current Odds: • 36°C: 74% • 37°C: 18% • 35°C: 8% • 38°C: 1% • 34°C: 0.5% • 39°C: 0.5% • 32°C or below: 0.1% • 33°C: 0.1%1.3s
PillarLab
⏳ Step 2: Gathering intelligence (parallel)...
PillarLab
✅ Intelligence gathered: Forecast Models (GFS/ECMWF/NWS) · Historical Base Rate (NOAA) · Forecast Uncertainty / Ensemble · Storm Tracking (NHC) · Candidate Dossiers (case for + case against, every candidate ≥2%)32.1s
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🧠 Step 3: Deep Analysing across all 9 pillars — hang tight, ~20s...
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📊 Market Summary

🌦️ Highest temperature in Madrid on August 19?

OutcomeCurrent Odds
36°C74%
37°C18%
35°C8%
38°C1%
34°C0.5%
39°C0.5%
32°C or below0.1%
33°C0.1%

8 options total

PillarLab

🎯 Best Trade

  • Action: 36°C — NO @ 26%

  • Confidence: 🔴 LOW · Uncertainty: MEDIUM

  • Why — the case against 36°C:

  • Forecast consensus from AEMET and other sources converges on 36°C for Madrid on August 19, but some sources predict 38-40°C, introducing upside risk.
  • The airport station (Barajas) tends to run cooler than the urban heat island, so the recorded high may fall below the forecast peak.
  • The market's 74% implies a narrow distribution, but medium-range forecast skill for exact max temps is limited, suggesting the true probability is lower.
PillarLab

📈 Where the Market Stands

OptionMarketRead
36°C74%🔴 OVERPRICED
37°C18%🟢 UNDERPRICED
35°C8%🟢 UNDERPRICED

Verdicts compare my own read against the market price — 🟢 UNDERPRICED (market has it too low) · 🔴 OVERPRICED (market has it too high). The analysis below is the why.

PillarLab

🔬 9-Pillar Analysis (Meteorological Method)

🌡️ 1. Forecast Consensus

My Vegas Line reads 36°C as the clear favorite at 74%, with 37°C at 18% and 35°C at 8%, reflecting a tight distribution around the forecast consensus.

📊 2. Ensemble Spread

Ensemble spread data is not published for this niche single-city temperature market, but the market's own probability spread (74/18/8) implies a narrow distribution, which may understate the true uncertainty in a 5-day forecast.

⏳ 3. Forecast Skill Decay

The market prices 36°C at 74% for a date several days out, but medium-range forecasts (5+ days) have historically lower skill for exact maximum temperatures, suggesting the market may be overconfident.

📈 4. Historical Base Rate

Historical base rate data for Madrid on August 19 is not available in the intelligence, but climatologically, Madrid's August highs typically range 32-38°C, with 36°C being a plausible but not dominant outcome.

🔀 5. Model Divergence

Model divergence is evident: some sources forecast 38°C or 40°C for Madrid on August 19, while others converge on 36°C; if the warmer outlier is right, 36°C becomes less likely.

📍 6. Micro-Climate Bias

The station is Adolfo Suárez Madrid-Barajas Airport, which is slightly cooler than the urban heat island of central Madrid; this could bias the recorded high lower than city-center forecasts.

🌀 7. Storm Track

No storm track applies here; the main risk is a heat plume shift that could push temperatures higher or lower than the consensus, but the forecast cone is stable around 36°C.

💰 8. Market Pricing

MEDIUM - The market is liquid (59k volume) and prices align with the forecast consensus, but the 74% on 36°C may be slightly overpriced given model spread and the airport's cooling bias.

⚡ 9. Contrarian Check

The main contrarian risk is that the market is overpricing 36°C; if the warmer outlier (38-40°C) verifies, 36°C loses, and the trailing 37°C or 35°C could be underpriced.

PillarLab

⚠️ Disclaimer: AI can make mistakes. This is not financial advice, and not a meteorological forecast — verify against NWS/NOAA and current model output before placing any trades.

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