{"title":"Records on 12-21 in past years","description":"Record events on 12-21 across the years in the data.","dataAsOf":"2026-10-17T00:00:00Z","lastRevised":"2026-10-18","source":"Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products.","licence":"US Government open data (NOAA NCEI)","page":"https://worldextremeweathermonitor.com/on-this-day/12-21/","columns":[{"name":"id","description":"Stable record id: station, date, type and timescale."},{"name":"station_id","description":"GHCN-Daily station id."},{"name":"station_name","description":"Station name."},{"name":"country","description":"ISO 3166 alpha-2 country code."},{"name":"type","description":"Record type: tmax_high, tmax_low, tmin_high, tmin_low, prcp_high, snow_high or snwd_high."},{"name":"timescale","description":"daily, monthly or all-time."},{"name":"date","description":"Date the record was set, YYYY-MM-DD."},{"name":"value","description":"Record value in degrees Celsius or millimetres."},{"name":"unit","description":"c for degrees Celsius, mm for millimetres."},{"name":"previous_value","description":"The record it replaced, in the same unit. Empty for a first record."},{"name":"previous_date","description":"Date of the replaced record."},{"name":"margin","description":"How far the new value beat the old record, a non negative magnitude in the same unit. Zero for a tie."},{"name":"years_stood","description":"Whole years the replaced record had stood."},{"name":"significance","description":"Record Significance Score from 0 to 100 (see /methodology/)."},{"name":"tie","description":"True when the value tied the record."},{"name":"provisional","description":"True while the record is inside the 60 day provisional window."},{"name":"lat","description":"Station latitude in decimal degrees."},{"name":"lon","description":"Station longitude in decimal degrees."}],"rows":[{"id":"USC00481730-2006-12-21-prcp_high-monthly","station_id":"USC00481730","station_name":"Chugwater","country":"US","type":"prcp_high","timescale":"monthly","date":"2006-12-21","value":46,"unit":"mm","previous_value":26.4,"previous_date":"1913-12-05","margin":19.6,"years_stood":93,"significance":87,"tie":false,"provisional":false,"lat":41.7589,"lon":-104.8228},{"id":"USC00481730-2006-12-21-snow_high-monthly","station_id":"USC00481730","station_name":"Chugwater","country":"US","type":"snow_high","timescale":"monthly","date":"2006-12-21","value":584,"unit":"mm","previous_value":279,"previous_date":"1913-12-05","margin":305,"years_stood":93,"significance":87,"tie":false,"provisional":false,"lat":41.7589,"lon":-104.8228},{"id":"ASN00081020-1992-12-21-prcp_high-all-time","station_id":"ASN00081020","station_name":"Inglewood (Post 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S","country":"US","type":"snwd_high","timescale":"daily","date":"2020-12-21","value":584,"unit":"mm","previous_value":305,"previous_date":"1914-12-21","margin":279,"years_stood":106,"significance":80,"tie":false,"provisional":false,"lat":41.7511,"lon":-76.4431},{"id":"USC00284229-2009-12-21-snwd_high-daily","station_id":"USC00284229","station_name":"Indian Mills 2 W","country":"US","type":"snwd_high","timescale":"daily","date":"2009-12-21","value":559,"unit":"mm","previous_value":279,"previous_date":"1904-12-21","margin":280,"years_stood":104,"significance":79,"tie":false,"provisional":false,"lat":39.7994,"lon":-74.7806},{"id":"ASN00056017-1973-12-21-prcp_high-monthly","station_id":"ASN00056017","station_name":"Inverell 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