Highest temperature in Denver on Sep 12, 2026?

📊 Market Summary

🌦️ Highest temperature in Denver on Sep 12, 2026?

6 options total

🎯 Best Trade

• Action: 82° to 83° — YES @ 61%

• Confidence: 🔴 LOW · Uncertainty: MEDIUM

• Why:

• ECMWF (85.7°F) is the warmest model member for Sep 12 and lands squarely in this band.
• The station has already hit 84°F at 06:53Z, so this bucket is partially realized and the market may be slow to reflect that.
• Denver's warm bias at KDEN plus a slight chance of afternoon storms that could cap the high just above 83°F keeps this band live.

📈 Where the Market Stands

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.

🔬 9-Pillar Analysis (Meteorological Method)

🌡️ 1. Forecast Consensus

My Vegas Line reads 82-83° as the clear favorite at 61%, and the NWS point forecast for Sep 12 (83°F) sits exactly inside that band, so the market's lean is confirmed rather than challenged.

📊 2. Ensemble Spread

Raw model spread for Sep 12 is only 2.8°F (GFS 83.5, ECMWF 85.7, ICON 82.9), which is tight relative to the 2°F band width — the market's confidence is broadly justified, though ECMWF's 85.7°F is the one member leaning into the 84-85° bucket.

⏳ 3. Forecast Skill Decay

This is a same-day/near-term market with the station already reporting 84°F at 06:53Z, so skill decay is minimal — the forecast horizon is short and the NWS point forecast is the authoritative input.

📈 4. Historical Base Rate

Denver mid-September climatology centers highs in the low-to-mid 80s, making 82-83° a plausible modal outcome and the 79°-or-below and 88°-or-above tails genuinely low-probability.

🔀 5. Model Divergence

If ECMWF (85.7°F) is the outlier that verifies, the 84-85° bucket wins and the 82-83° favorite dies — that is the single scenario that kills the priced-in band.

📍 6. Micro-Climate Bias

KDEN is the settling station and runs warmer than a city-wide read; the NWS point forecast of 83°F is already station-specific, so no micro-climate adjustment is needed beyond trusting that number.

🌀 7. Storm Track

Not a tropical or severe-weather contract — no storm track applies; the only 'track' risk is a late-afternoon thunderstorm shading the station before the daily max is set.

💰 8. Market Pricing

MEDIUM - the market is liquid enough (6,797 volume) and the NWS point forecast lands squarely in the favorite band, so there is no cross-platform doubt to exploit; the pricing looks internally consistent.

⚡ 9. Contrarian Check

The main contrarian risk is that the station has ALREADY hit 84°F today, meaning if the daily max is set early the 82-83° band could be dead and the 84-85° bucket (23%) is the real winner — the market may be underpricing that already-observed 84°F.

⚠️ 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.