How to parse .stat file to csv or json?

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I am doing some data analytics on weather data. At first I wanted to process epw files but then I realized that it is already done and available as .stat files. The problem though is to extract data from these files. I used regex for a few variables, but it is just too much time consuming. Does anyone have a better solution to parse these files preferably to csv or json? If the source code for the weather.exe is available somewhere, I could modify it to save the output as csv or json format.