We share long term, continuous measurements of soil radon emanations in Italy acquired from 2009 to 2021 by the Italian Radon mOnitoring Network (IRON). The radon concentrations were measured at 62 stations and consist of 621 720 single measurements. Employed detectors are both in-house prototypes (LUCAS) and commercial devices (AER by Algade©), suitably calibrated at INGV radionuclide laboratory. In addiction to radon concentration, most stations acquire internal temperature, while a subset of them also record relative humidity. When available, all these data series are provided along with radon time series and consist of 1 320 710 local temperature and humidity data. The presented dataset allows monitoring variations in radon emissions on multiple time scales, using different analysis techniques. Potential investigations include the effect of environmental parameters/conditions on radon emissions, the study of the impact on such emissions of transient signals like those associated with seismic and volcanic preparation processes and fluid migration dynamics as well as analyses of risk for human health, related to prolonged exposure to radon gas accumulated in confined spaces.