Traders have priced a 96% probability on a 70-71°F minimum in Atlanta on September 11, driven by verified National Weather Service observations from the primary airport station confirming the daily low fell squarely in that interval. Late-summer conditions featuring high dew points, light winds, and limited overnight radiational cooling under partly cloudy skies produced these readings, aligning with National Centers for Environmental Prediction model consensus and typical mid-September climatology for the region. The tight market distribution reflects strong confidence in the official thermometer data, though minor adjustments from station reanalysis or differing measurement timing remain the primary scenarios that could alter the resolved bin.