Trader consensus around 3–6 inches for September 2026 NYC precipitation reflects substantial forecast uncertainty at this lead time. Long-range outlooks from the National Weather Service and Old Farmer’s Almanac point to a warmer early month with below-average rainfall potential across the Northeast, linked to a strengthening El Niño pattern that often suppresses Atlantic tropical activity and favors drier steering flows. However, September remains the peak of hurricane season, when remnants of tropical systems or enhanced moisture transport can produce extreme convective events capable of pushing totals above 6 inches. Historical Central Park data show high interannual variability around the 4.3-inch climatological mean, with model spread in jet-stream position and moisture convergence keeping probabilities clustered near the middle bins while allowing meaningful tail risk for both drier and wetter outcomes.