India Meteorological Department observations at Chaudhary Charan Singh International Airport in Lucknow recorded a maximum temperature of 39.8°C on April 17, 2026, by late afternoon amid clear skies, low humidity around 26% at 1730 IST, and hazy conditions—driving trader consensus to 100% on the 39°C outcome, as this falls within the market's bin for that integer value. This aligns with IMD's pre-day forecast of around 39–40°C and recent model runs anticipating stable high pressure with minimal cloud cover preventing higher peaks, consistent with climatological norms for mid-April where daily highs average 38–39°C amid emerging heatwave patterns across Uttar Pradesh. Realistic challenges would require a late-day data revision or an overlooked higher reading from supplementary stations, though the airport's automated observations provide authoritative ground truth; final confirmation awaits IMD's evening bulletin.