This is the code and data associated with the paper titled: "Enhancing PM2.5 Prediction Using NARX-Based Combined CNN and LSTM Hybrid Model" The paper is published in Sensors Journal available at https://www.mdpi.com/1424-8220/22/12/4418 DOI: 10.3390/s22124418 Please cite the paper if you use the code. If you have any questions, please post it in the Discussions Section.