This data publication contains 30-minute meteorological data collected from 2006 - ongoing at the Marcell Experimental Forest (MEF) in Itasca County, Minnesota, which is operated and maintained by the USDA Forest Service, Northern Research Station. Air temperature, relative humidity, wind speed and direction, photosynthetic photon flux density, soil temperature, and soil volumetric water content were measured at three meteorological monitoring stations. One station is in an upland clearing, one is under an upland forest canopy, and the third is in a peatland.