Raw and classified monsoon/Harmattan boundary geometries, annual boundary-position series (1981–2024), regional 4-channel ConvLSTM input data, statistical trend/variance/benchmark test result tables, publication figures, and the full set of analysis notebooks supporting the manuscript "Regional-Scale Detection of ITCZ Migration-Limit Shifts in Cameroon (1981–2024): A ConvLSTM and Classical Geostatistics Benchmark". Covers moisture-based boundary detection (August precipitation / January dewpoint temperature via a mask-gradient-vectorize procedure), three independent significance tests, and benchmarking of a regional ConvLSTM against Space-Time Kriging and Geographically Weighted Regression on deseasonalized anomalies.