It’s not documented in Github README, but you find the needed config in the implementation here So…try the following and add the windUnits property. { module: "MMM-OneCallWeather", position: "top_right", header: "xxxxxx, // OPDATERET HEADER config: { latitude: "xxxxxx", // OPDATERET LATITUDE longitude: "xxxxx", // OPDATERET LONGITUDE apikey: "xxxxxxx", iconset: "4a", iconsetFormat: "png", units: "metric", // Styrer at vindhastighed er i m/s fade: false, windUnits: "ms" //ADD THIS PROPERTY } }