{"title":"Records on 09-21 in past years","description":"Record events on 09-21 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/09-21/","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":"USC00425892-2004-09-21-prcp_high-all-time","station_id":"USC00425892","station_name":"Mtn Dell Dam","country":"US","type":"prcp_high","timescale":"all-time","date":"2004-09-21","value":127.3,"unit":"mm","previous_value":61.5,"previous_date":"1926-09-30","margin":65.8,"years_stood":77,"significance":91,"tie":false,"provisional":false,"lat":40.7486,"lon":-111.7233},{"id":"USC00051179-1995-09-21-snow_high-daily","station_id":"USC00051179","station_name":"Byers 5 ENE","country":"US","type":"snow_high","timescale":"daily","date":"1995-09-21","value":305,"unit":"mm","previous_value":0,"previous_date":"1895-09-21","margin":305,"years_stood":99,"significance":79,"tie":false,"provisional":false,"lat":39.7406,"lon":-104.1275},{"id":"ASN00024013-2022-09-21-prcp_high-daily","station_id":"ASN00024013","station_name":"Loxton (Pyap)","country":"AU","type":"prcp_high","timescale":"daily","date":"2022-09-21","value":33.6,"unit":"mm","previous_value":7.6,"previous_date":"1923-09-21","margin":26,"years_stood":99,"significance":79,"tie":false,"provisional":false,"lat":-34.4442,"lon":140.4958},{"id":"ASN00025014-2022-09-21-prcp_high-daily","station_id":"ASN00025014","station_name":"Paruna","country":"AU","type":"prcp_high","timescale":"daily","date":"2022-09-21","value":32.4,"unit":"mm","previous_value":7.9,"previous_date":"1923-09-21","margin":24.5,"years_stood":99,"significance":79,"tie":false,"provisional":false,"lat":-34.7169,"lon":140.7352},{"id":"SF001437840-1987-09-21-prcp_high-daily","station_id":"SF001437840","station_name":"Hanover (Pol)","country":"ZA","type":"prcp_high","timescale":"daily","date":"1987-09-21","value":55,"unit":"mm","previous_value":16.3,"previous_date":"1888-09-21","margin":38.7,"years_stood":98,"significance":79,"tie":false,"provisional":false,"lat":-31.07,"lon":24.45},{"id":"GME00125662-1967-09-21-prcp_high-monthly","station_id":"GME00125662","station_name":"Mainz-Lerchenberg (Zdf)","country":"DE","type":"prcp_high","timescale":"monthly","date":"1967-09-21","value":47.1,"unit":"mm","previous_value":29.6,"previous_date":"1897-09-05","margin":17.5,"years_stood":70,"significance":78,"tie":false,"provisional":false,"lat":49.9681,"lon":8.2117},{"id":"ASN00019046-2022-09-21-prcp_high-daily","station_id":"ASN00019046","station_name":"Hawker (Warcowie)","country":"AU","type":"prcp_high","timescale":"daily","date":"2022-09-21","value":35.2,"unit":"mm","previous_value":9.1,"previous_date":"1886-09-21","margin":26.1,"years_stood":135,"significance":77,"tie":false,"provisional":false,"lat":-31.775,"lon":138.6529},{"id":"ASN00024003-2022-09-21-prcp_high-daily","station_id":"ASN00024003","station_name":"Renmark Irrigation","country":"AU","type":"prcp_high","timescale":"daily","date":"2022-09-21","value":38.2,"unit":"mm","previous_value":16.5,"previous_date":"1886-09-21","margin":21.7,"years_stood":135,"significance":77,"tie":false,"provisional":false,"lat":-34.1658,"lon":140.7541},{"id":"ASN00033082-1996-09-21-prcp_high-daily","station_id":"ASN00033082","station_name":"Strathmore","country":"AU","type":"prcp_high","timescale":"daily","date":"1996-09-21","value":50,"unit":"mm","previous_value":0,"previous_date":"1893-09-21","margin":50,"years_stood":102,"significance":77,"tie":false,"provisional":false,"lat":-20.4992,"lon":147.6278},{"id":"ASN00048079-1998-09-21-prcp_high-daily","station_id":"ASN00048079","station_name":"Wanaaring Post Office","country":"AU","type":"prcp_high","timescale":"daily","date":"1998-09-21","value":40.6,"unit":"mm","previous_value":13,"previous_date":"1890-09-21","margin":27.6,"years_stood":107,"significance":76,"tie":false,"provisional":false,"lat":-29.7029,"lon":144.1482},{"id":"ASN00060015-1982-09-21-prcp_high-daily","station_id":"ASN00060015","station_name":"Gloucester Post Office","country":"AU","type":"prcp_high","timescale":"daily","date":"1982-09-21","value":87.2,"unit":"mm","previous_value":29.7,"previous_date":"1891-09-21","margin":57.5,"years_stood":90,"significance":76,"tie":false,"provisional":false,"lat":-32.0063,"lon":151.9597},{"id":"ASN00010655-2017-09-21-prcp_high-daily","station_id":"ASN00010655","station_name":"Williams","country":"AU","type":"prcp_high","timescale":"daily","date":"2017-09-21","value":35.2,"unit":"mm","previous_value":12.7,"previous_date":"1928-09-21","margin":22.5,"years_stood":88,"significance":76,"tie":false,"provisional":false,"lat":-33.0269,"lon":116.8792},{"id":"USC00127935-2009-09-21-prcp_high-daily","station_id":"USC00127935","station_name":"Seymour 1 WSW","country":"US","type":"prcp_high","timescale":"daily","date":"2009-09-21","value":74.2,"unit":"mm","previous_value":19.1,"previous_date":"1921-09-21","margin":55.1,"years_stood":88,"significance":76,"tie":false,"provisional":false,"lat":38.9542,"lon":-85.9044},{"id":"USC00388887-2009-09-21-prcp_high-daily","station_id":"USC00388887","station_name":"Walhalla","country":"US","type":"prcp_high","timescale":"daily","date":"2009-09-21","value":212.9,"unit":"mm","previous_value":40.6,"previous_date":"1921-09-21","margin":172.3,"years_stood":88,"significance":76,"tie":false,"provisional":false,"lat":34.7544,"lon":-83.075},{"id":"USC00015537-1998-09-21-prcp_high-monthly","station_id":"USC00015537","station_name":"Montevallo","country":"US","type":"prcp_high","timescale":"monthly","date":"1998-09-21","value":152.9,"unit":"mm","previous_value":88.1,"previous_date":"1942-09-27","margin":64.8,"years_stood":55,"significance":76,"tie":false,"provisional":false,"lat":33.0981,"lon":-86.8658},{"id":"MXN00003031-2003-09-21-prcp_high-all-time","station_id":"MXN00003031","station_name":"La Soledad Nte","country":"MX","type":"prcp_high","timescale":"all-time","date":"2003-09-21","value":359.9,"unit":"mm","previous_value":220,"previous_date":"1962-09-21","margin":139.9,"years_stood":40,"significance":76,"tie":false,"provisional":false,"lat":24.8,"lon":-110.9667},{"id":"SF000175820-1993-09-21-prcp_high-daily","station_id":"SF000175820","station_name":"Cape St. 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