{"title":"Chicago: Days with min at or below -20 C, days by year","description":"Days by year for Days with min at or below -20 C in Chicago.","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/cities/chicago/days-below-minus-20c/","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":"tmin_le_m20c","year":1959,"days":6,"first":"1959-01-04","last":"1959-02-06","longest_streak":2},{"threshold":"tmin_le_m20c","year":1960,"days":3,"first":"1960-12-21","last":"1960-12-23","longest_streak":3},{"threshold":"tmin_le_m20c","year":1961,"days":6,"first":"1961-01-22","last":"1961-12-28","longest_streak":2},{"threshold":"tmin_le_m20c","year":1962,"days":11,"first":"1962-01-09","last":"1962-12-26","longest_streak":3},{"threshold":"tmin_le_m20c","year":1963,"days":36,"first":"1963-01-13","last":"1963-12-31","longest_streak":10},{"threshold":"tmin_le_m20c","year":1964,"days":1,"first":"1964-01-01","last":"1964-01-01","longest_streak":0},{"threshold":"tmin_le_m20c","year":1965,"days":9,"first":"1965-01-14","last":"1965-02-04","longest_streak":8},{"threshold":"tmin_le_m20c","year":1966,"days":10,"first":"1966-01-17","last":"1966-02-20","longest_streak":4},{"threshold":"tmin_le_m20c","year":1967,"days":6,"first":"1967-01-17","last":"1967-12-31","longest_streak":2},{"threshold":"tmin_le_m20c","year":1968,"days":5,"first":"1968-01-01","last":"1968-12-31","longest_streak":2},{"threshold":"tmin_le_m20c","year":1969,"days":6,"first":"1969-01-01","last":"1969-01-12","longest_streak":3},{"threshold":"tmin_le_m20c","year":1970,"days":9,"first":"1970-01-06","last":"1970-02-03","longest_streak":4},{"threshold":"tmin_le_m20c","year":1971,"days":4,"first":"1971-01-06","last":"1971-02-02","longest_streak":3},{"threshold":"tmin_le_m20c","year":1972,"days":11,"first":"1972-01-05","last":"1972-12-17","longest_streak":3},{"threshold":"tmin_le_m20c","year":1974,"days":1,"first":"1974-01-12","last":"1974-01-12","longest_streak":1},{"threshold":"tmin_le_m20c","year":1975,"days":1,"first":"1975-02-09","last":"1975-02-09","longest_streak":1},{"threshold":"tmin_le_m20c","year":1976,"days":6,"first":"1976-01-08","last":"1976-12-31","longest_streak":2},{"threshold":"tmin_le_m20c","year":1977,"days":11,"first":"1977-01-11","last":"1977-12-11","longest_streak":3},{"threshold":"tmin_le_m20c","year":1978,"days":9,"first":"1978-01-02","last":"1978-12-10","longest_streak":3},{"threshold":"tmin_le_m20c","year":1979,"days":15,"first":"1979-01-02","last":"1979-02-19","longest_streak":5},{"threshold":"tmin_le_m20c","year":1980,"days":2,"first":"1980-02-17","last":"1980-12-25","longest_streak":1},{"threshold":"tmin_le_m20c","year":1981,"days":6,"first":"1981-01-03","last":"1981-02-12","longest_streak":2},{"threshold":"tmin_le_m20c","year":1982,"days":12,"first":"1982-01-07","last":"1982-02-10","longest_streak":4},{"threshold":"tmin_le_m20c","year":1983,"days":9,"first":"1983-12-18","last":"1983-12-30","longest_streak":5},{"threshold":"tmin_le_m20c","year":1984,"days":6,"first":"1984-01-10","last":"1984-01-21","longest_streak":4},{"threshold":"tmin_le_m20c","year":1985,"days":18,"first":"1985-01-03","last":"1985-12-25","longest_streak":5},{"threshold":"tmin_le_m20c","year":1986,"days":5,"first":"1986-01-07","last":"1986-02-13","longest_streak":2},{"threshold":"tmin_le_m20c","year":1987,"days":2,"first":"1987-01-23","last":"1987-01-24","longest_streak":2},{"threshold":"tmin_le_m20c","year":1988,"days":8,"first":"1988-01-04","last":"1988-02-13","longest_streak":4},{"threshold":"tmin_le_m20c","year":1989,"days":9,"first":"1989-02-06","last":"1989-12-24","longest_streak":5},{"threshold":"tmin_le_m20c","year":1990,"days":1,"first":"1990-12-26","last":"1990-12-26","longest_streak":1},{"threshold":"tmin_le_m20c","year":1992,"days":3,"first":"1992-01-15","last":"1992-01-19","longest_streak":2},{"threshold":"tmin_le_m20c","year":1993,"days":1,"first":"1993-02-24","last":"1993-02-24","longest_streak":1},{"threshold":"tmin_le_m20c","year":1994,"days":16,"first":"1994-01-07","last":"1994-02-27","longest_streak":8},{"threshold":"tmin_le_m20c","year":1995,"days":1,"first":"1995-12-09","last":"1995-12-09","longest_streak":1},{"threshold":"tmin_le_m20c","year":1996,"days":6,"first":"1996-01-30","last":"1996-02-04","longest_streak":6},{"threshold":"tmin_le_m20c","year":1997,"days":8,"first":"1997-01-11","last":"1997-01-29","longest_streak":3},{"threshold":"tmin_le_m20c","year":1999,"days":4,"first":"1999-01-04","last":"1999-01-09","longest_streak":2},{"threshold":"tmin_le_m20c","year":2000,"days":7,"first":"2000-12-12","last":"2000-12-25","longest_streak":4},{"threshold":"tmin_le_m20c","year":2002,"days":1,"first":"2002-03-04","last":"2002-03-04","longest_streak":1},{"threshold":"tmin_le_m20c","year":2003,"days":2,"first":"2003-01-23","last":"2003-01-27","longest_streak":1},{"threshold":"tmin_le_m20c","year":2004,"days":2,"first":"2004-01-30","last":"2004-01-31","longest_streak":2},{"threshold":"tmin_le_m20c","year":2006,"days":1,"first":"2006-02-18","last":"2006-02-18","longest_streak":1},{"threshold":"tmin_le_m20c","year":2007,"days":6,"first":"2007-02-03","last":"2007-02-16","longest_streak":4},{"threshold":"tmin_le_m20c","year":2008,"days":6,"first":"2008-01-20","last":"2008-12-22","longest_streak":2},{"threshold":"tmin_le_m20c","year":2009,"days":3,"first":"2009-01-15","last":"2009-02-05","longest_streak":2},{"threshold":"tmin_le_m20c","year":2011,"days":3,"first":"2011-01-21","last":"2011-02-10","longest_streak":1},{"threshold":"tmin_le_m20c","year":2013,"days":1,"first":"2013-12-10","last":"2013-12-10","longest_streak":1},{"threshold":"tmin_le_m20c","year":2014,"days":11,"first":"2014-01-03","last":"2014-02-12","longest_streak":3},{"threshold":"tmin_le_m20c","year":2015,"days":6,"first":"2015-01-06","last":"2015-02-28","longest_streak":3},{"threshold":"tmin_le_m20c","year":2016,"days":2,"first":"2016-12-18","last":"2016-12-19","longest_streak":2},{"threshold":"tmin_le_m20c","year":2018,"days":2,"first":"2018-01-01","last":"2018-01-02","longest_streak":2},{"threshold":"tmin_le_m20c","year":2019,"days":6,"first":"2019-01-25","last":"2019-01-31","longest_streak":3},{"threshold":"tmin_le_m20c","year":2021,"days":2,"first":"2021-02-07","last":"2021-02-14","longest_streak":1},{"threshold":"tmin_le_m20c","year":2022,"days":3,"first":"2022-01-26","last":"2022-12-23","longest_streak":2},{"threshold":"tmin_le_m20c","year":2024,"days":3,"first":"2024-01-14","last":"2024-01-16","longest_streak":3},{"threshold":"tmin_le_m20c","year":2025,"days":2,"first":"2025-01-21","last":"2025-02-18","longest_streak":1},{"threshold":"tmin_le_m20c","year":2026,"days":2,"first":"2026-01-23","last":"2026-01-24","longest_streak":2}]}