{"title":"Alliston Nelson: threshold days by year","description":"Days at or beyond each fixed threshold at Alliston Nelson, 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/CA006110218/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":1978,"days":23,"first":"1978-05-26","last":"1978-08-19","longest_streak":5},{"threshold":"tmax_ge_30c","year":1979,"days":16,"first":"1979-05-09","last":"1979-09-01","longest_streak":4},{"threshold":"tmax_ge_30c","year":1980,"days":14,"first":"1980-05-22","last":"1980-08-27","longest_streak":4},{"threshold":"tmax_ge_30c","year":1981,"days":6,"first":"1981-06-15","last":"1981-07-13","longest_streak":2},{"threshold":"tmax_ge_30c","year":1982,"days":8,"first":"1982-07-06","last":"1982-09-13","longest_streak":2},{"threshold":"tmax_ge_30c","year":1983,"days":34,"first":"1983-06-12","last":"1983-09-10","longest_streak":7},{"threshold":"tmax_ge_35c","year":1983,"days":1,"first":"1983-07-01","last":"1983-07-01","longest_streak":1},{"threshold":"tmax_ge_90f","year":1978,"days":4,"first":"1978-07-07","last":"1978-08-14","longest_streak":2},{"threshold":"tmax_ge_90f","year":1981,"days":1,"first":"1981-06-15","last":"1981-06-15","longest_streak":1},{"threshold":"tmax_ge_90f","year":1983,"days":5,"first":"1983-06-26","last":"1983-09-10","longest_streak":1},{"threshold":"tmax_le_0c","year":1978,"days":89,"first":"1978-01-01","last":"1978-12-29","longest_streak":28},{"threshold":"tmax_le_0c","year":1979,"days":66,"first":"1979-01-01","last":"1979-12-26","longest_streak":23},{"threshold":"tmax_le_0c","year":1980,"days":82,"first":"1980-01-02","last":"1980-12-31","longest_streak":27},{"threshold":"tmax_le_0c","year":1981,"days":62,"first":"1981-01-01","last":"1981-12-30","longest_streak":6},{"threshold":"tmax_le_0c","year":1982,"days":72,"first":"1982-01-02","last":"1982-12-31","longest_streak":16},{"threshold":"tmax_le_0c","year":1983,"days":58,"first":"1983-01-02","last":"1983-12-31","longest_streak":10},{"threshold":"tmin_le_0c","year":1978,"days":169,"first":"1978-01-01","last":"1978-12-31","longest_streak":62},{"threshold":"tmin_le_0c","year":1979,"days":154,"first":"1979-01-01","last":"1979-12-31","longest_streak":34},{"threshold":"tmin_le_0c","year":1980,"days":160,"first":"1980-01-01","last":"1980-12-31","longest_streak":70},{"threshold":"tmin_le_0c","year":1981,"days":160,"first":"1981-01-01","last":"1981-12-31","longest_streak":32},{"threshold":"tmin_le_0c","year":1982,"days":152,"first":"1982-01-01","last":"1982-12-31","longest_streak":66},{"threshold":"tmin_le_0c","year":1983,"days":156,"first":"1983-01-01","last":"1983-12-31","longest_streak":35},{"threshold":"tmin_le_m10c","year":1978,"days":74,"first":"1978-01-01","last":"1978-12-29","longest_streak":16},{"threshold":"tmin_le_m10c","year":1979,"days":51,"first":"1979-01-03","last":"1979-12-21","longest_streak":18},{"threshold":"tmin_le_m10c","year":1980,"days":62,"first":"1980-01-03","last":"1980-12-31","longest_streak":23},{"threshold":"tmin_le_m10c","year":1981,"days":51,"first":"1981-01-01","last":"1981-12-25","longest_streak":5},{"threshold":"tmin_le_m10c","year":1982,"days":63,"first":"1982-01-02","last":"1982-12-18","longest_streak":20},{"threshold":"tmin_le_m10c","year":1983,"days":41,"first":"1983-01-04","last":"1983-12-31","longest_streak":7},{"threshold":"tmin_le_m20c","year":1978,"days":15,"first":"1978-01-09","last":"1978-12-29","longest_streak":3},{"threshold":"tmin_le_m20c","year":1979,"days":16,"first":"1979-01-11","last":"1979-12-17","longest_streak":11},{"threshold":"tmin_le_m20c","year":1980,"days":11,"first":"1980-02-02","last":"1980-12-31","longest_streak":4},{"threshold":"tmin_le_m20c","year":1981,"days":10,"first":"1981-01-02","last":"1981-12-20","longest_streak":3},{"threshold":"tmin_le_m20c","year":1982,"days":16,"first":"1982-01-10","last":"1982-12-13","longest_streak":3},{"threshold":"tmin_le_m20c","year":1983,"days":8,"first":"1983-01-19","last":"1983-12-26","longest_streak":3},{"threshold":"tmin_le_m30c","year":1979,"days":1,"first":"1979-02-18","last":"1979-02-18","longest_streak":1},{"threshold":"tmin_le_m30c","year":1980,"days":1,"first":"1980-12-25","last":"1980-12-25","longest_streak":1},{"threshold":"tmin_le_m30c","year":1981,"days":2,"first":"1981-01-04","last":"1981-01-12","longest_streak":1},{"threshold":"tmin_le_m30c","year":1982,"days":1,"first":"1982-01-12","last":"1982-01-12","longest_streak":1},{"threshold":"tmin_ge_20c","year":1978,"days":6,"first":"1978-06-27","last":"1978-08-15","longest_streak":2},{"threshold":"tmin_ge_20c","year":1979,"days":2,"first":"1979-07-15","last":"1979-07-25","longest_streak":1},{"threshold":"tmin_ge_20c","year":1980,"days":5,"first":"1980-07-11","last":"1980-08-31","longest_streak":1},{"threshold":"tmin_ge_20c","year":1981,"days":4,"first":"1981-06-15","last":"1981-07-09","longest_streak":2},{"threshold":"tmin_ge_20c","year":1982,"days":2,"first":"1982-07-07","last":"1982-07-18","longest_streak":1},{"threshold":"tmin_ge_20c","year":1983,"days":10,"first":"1983-07-04","last":"1983-09-10","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1974,"days":19,"first":"1974-01-26","last":"1974-11-20","longest_streak":2},{"threshold":"prcp_ge_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