Version 4.9.4 contains new features focused on de-interleaving time coordinates and per-record weighting for ncra, high-freqency (e.g., diurnally-resolved) climatologies and new defaults for ncclimo, a new distance-weight extrapolation algorithm for ncremap, per-file weights for nces. New NCO-wide features include: support for unbuffered I/O that can speed-up I/O for large record variables, more precise quantization than Bit Grooming, and faster arithmetic that takes advantage of SIMD directives on OpenMP-enabled builds. Overall release is packed with interesting new features.