{"title":"Charleston NAS: threshold days by year","description":"Days at or beyond each fixed threshold at Charleston NAS, by year.","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/stations/USW00013758/thresholds/","columns":[{"name":"threshold","description":"Threshold id, for example tmax_ge_40c."},{"name":"year","description":"Calendar year."},{"name":"days","description":"Days in the year at or beyond the threshold."},{"name":"first","description":"First qualifying date of the year."},{"name":"last","description":"Last qualifying date of the year."},{"name":"longest_streak","description":"Longest run of consecutive qualifying days inside the year."}],"rows":[{"threshold":"tmax_ge_30c","year":1973,"days":98,"first":"1973-05-10","last":"1973-10-05","longest_streak":18},{"threshold":"tmax_ge_30c","year":1974,"days":61,"first":"1974-05-01","last":"1974-09-29","longest_streak":6},{"threshold":"tmax_ge_30c","year":1975,"days":87,"first":"1975-05-17","last":"1975-09-23","longest_streak":20},{"threshold":"tmax_ge_30c","year":1976,"days":49,"first":"1976-05-12","last":"1976-09-28","longest_streak":14},{"threshold":"tmax_ge_30c","year":1977,"days":95,"first":"1977-03-16","last":"1977-10-02","longest_streak":39},{"threshold":"tmax_ge_30c","year":2025,"days":99,"first":"2025-05-15","last":"2025-10-08","longest_streak":27},{"threshold":"tmax_ge_35c","year":1973,"days":2,"first":"1973-07-05","last":"1973-08-13","longest_streak":1},{"threshold":"tmax_ge_35c","year":1975,"days":2,"first":"1975-08-17","last":"1975-08-18","longest_streak":2},{"threshold":"tmax_ge_35c","year":1976,"days":3,"first":"1976-07-15","last":"1976-07-25","longest_streak":2},{"threshold":"tmax_ge_35c","year":1977,"days":16,"first":"1977-06-21","last":"1977-09-17","longest_streak":6},{"threshold":"tmax_ge_35c","year":2025,"days":9,"first":"2025-05-20","last":"2025-07-31","longest_streak":3},{"threshold":"tmax_ge_90f","year":1973,"days":33,"first":"1973-05-11","last":"1973-09-23","longest_streak":7},{"threshold":"tmax_ge_90f","year":1974,"days":20,"first":"1974-05-30","last":"1974-09-15","longest_streak":3},{"threshold":"tmax_ge_90f","year":1975,"days":42,"first":"1975-05-22","last":"1975-09-05","longest_streak":8},{"threshold":"tmax_ge_90f","year":1976,"days":21,"first":"1976-06-12","last":"1976-08-29","longest_streak":7},{"threshold":"tmax_ge_90f","year":1977,"days":46,"first":"1977-05-06","last":"1977-09-21","longest_streak":9},{"threshold":"tmax_ge_90f","year":2025,"days":63,"first":"2025-05-15","last":"2025-09-26","longest_streak":17},{"threshold":"tmax_ge_100f","year":1977,"days":1,"first":"1977-07-22","last":"1977-07-22","longest_streak":1},{"threshold":"tmax_le_0c","year":1973,"days":1,"first":"1973-02-10","last":"1973-02-10","longest_streak":1},{"threshold":"tmax_le_0c","year":1977,"days":1,"first":"1977-01-17","last":"1977-01-17","longest_streak":1},{"threshold":"tmin_le_0c","year":1973,"days":13,"first":"1973-02-09","last":"1973-12-23","longest_streak":5},{"threshold":"tmin_le_0c","year":1974,"days":3,"first":"1974-02-26","last":"1974-12-18","longest_streak":1},{"threshold":"tmin_le_0c","year":1975,"days":7,"first":"1975-01-14","last":"1975-12-23","longest_streak":2},{"threshold":"tmin_le_0c","year":1976,"days":11,"first":"1976-01-05","last":"1976-12-22","longest_streak":3},{"threshold":"tmin_le_0c","year":1977,"days":28,"first":"1977-01-01","last":"1977-12-29","longest_streak":8},{"threshold":"tmin_le_0c","year":2025,"days":28,"first":"2025-01-03","last":"2025-12-31","longest_streak":7},{"threshold":"tmin_ge_20c","year":1973,"days":147,"first":"1973-03-16","last":"1973-10-28","longest_streak":88},{"threshold":"tmin_ge_20c","year":1974,"days":131,"first":"1974-04-04","last":"1974-11-05","longest_streak":27},{"threshold":"tmin_ge_20c","year":1975,"days":137,"first":"1975-04-19","last":"1975-11-12","longest_streak":123},{"threshold":"tmin_ge_20c","year":1976,"days":122,"first":"1976-04-22","last":"1976-10-08","longest_streak":70},{"threshold":"tmin_ge_20c","year":1977,"days":148,"first":"1977-03-30","last":"1977-11-05","longest_streak":103},{"threshold":"tmin_ge_20c","year":2025,"days":121,"first":"2025-04-03","last":"2025-10-08","longest_streak":84},{"threshold":"tmin_ge_25c","year":1973,"days":13,"first":"1973-07-04","last":"1973-08-15","longest_streak":4},{"threshold":"tmin_ge_25c","year":1974,"days":10,"first":"1974-06-01","last":"1974-08-30","longest_streak":3},{"threshold":"tmin_ge_25c","year":1975,"days":23,"first":"1975-06-06","last":"1975-09-07","longest_streak":5},{"threshold":"tmin_ge_25c","year":1976,"days":23,"first":"1976-07-10","last":"1976-09-27","longest_streak":6},{"threshold":"tmin_ge_25c","year":1977,"days":51,"first":"1977-06-13","last":"1977-09-21","longest_streak":17},{"threshold":"tmin_ge_25c","year":2025,"days":25,"first":"2025-05-21","last":"2025-08-15","longest_streak":6},{"threshold":"prcp_ge_10mm","year":1974,"days":32,"first":"1974-02-16","last":"1974-12-20","longest_streak":4},{"threshold":"prcp_ge_10mm","year":1975,"days":39,"first":"1975-01-08","last":"1975-12-25","longest_streak":6},{"threshold":"prcp_ge_10mm","year":1976,"days":32,"first":"1976-02-01","last":"1976-12-26","longest_streak":2},{"threshold":"prcp_ge_10mm","year":1977,"days":32,"first":"1977-01-03","last":"1977-12-30","longest_streak":3},{"threshold":"prcp_ge_25mm","year":1974,"days":17,"first":"1974-03-12","last":"1974-12-15","longest_streak":2},{"threshold":"prcp_ge_25mm","year":1975,"days":10,"first":"1975-01-23","last":"1975-08-28","longest_streak":2},{"threshold":"prcp_ge_25mm","year":1976,"days":13,"first":"1976-03-09","last":"1976-12-12","longest_streak":1},{"threshold":"prcp_ge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