Jupiter’s moon Io is well known for its active observed surface volcanoes. Recently, NASA’s Juno mission orbiting Jupiter performed two close flybys of Io, during which its Microwave Radiometer (MWR) measured thermal emission from Io at 6 microwave wavelengths. Since attenuation of electromagnetic radiation through a medium is wavelength dependent, longer wavelength channels receive radiation from deeper beneath the surface, thus allowing MWR to probe the subsurface thermal structure of Io. We present spatially variable maps of microwave emission over Io’s surface derived from the MWR measurements. We show that MWR is sensitive to volcanic hot spots as observed by Juno’s infrared instrument. With the derived microwave emission maps at different wavelengths, we are currently working on modeling the lava cooling and radiative transfer at notable volcanic units such as Io’s largest lava lake, Loki Patera. We will discuss the implications of our models on the structure of these features, as well as Io’s interior and thermodynamics more broadly. This work demonstrates the usefulness of microwave radiometry in studying volcanic features and has potential applications for future missions exploring volcanism on the Earth and Moon.