{"metadata":{"title":"Duluth, MN Monthly Climate Normals","page_url":"https://plainclimate.com/city/duluth-mn","primary_station_id":"USW00014913","source":"NOAA 1991-2020 U.S. Climate Normals","source_url":"https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals","vintage":"2026-08-04","license":"CC0 1.0","license_url":"https://creativecommons.org/publicdomain/zero/1.0/","citation":"PlainClimate, \"Duluth, MN Climate Normals\". 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