Minnesota. Department of Natural ResourcesMNDNR processing of precipitation data gathered by a variety of entities over 30 year period, from . Data sources include National Weather Service, DNR Forestry, Soil and Water Conservation Districts, and others.Climatic analyses and forecasting; hydrologic modeling; and forestry / agricultural analysesData is maintained and up-to-date. Time Period of Content Date indicates when the last major revisions were made. 300 to 1400 precipitation observers gathered data over 30 year period (seasonally varying), 1971-2000.Filesatmos-1971-2000-mn-precip-avgengPublicNormal Annual Precipitation Average, 1971-2000 [Minnesota]DatasetsMinnesota2003-07-01Minnesota Geospatial Commons