{"title":"Chicago: Days with min at or above 25 C, days by year","description":"Days by year for Days with min at or above 25 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/nights-above-25c/","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_ge_25c","year":1959,"days":1,"first":"1959-06-28","last":"1959-06-28","longest_streak":1},{"threshold":"tmin_ge_25c","year":1968,"days":3,"first":"1968-08-06","last":"1968-08-23","longest_streak":1},{"threshold":"tmin_ge_25c","year":1970,"days":2,"first":"1970-06-30","last":"1970-07-02","longest_streak":1},{"threshold":"tmin_ge_25c","year":1972,"days":5,"first":"1972-07-20","last":"1972-08-17","longest_streak":4},{"threshold":"tmin_ge_25c","year":1975,"days":1,"first":"1975-08-24","last":"1975-08-24","longest_streak":1},{"threshold":"tmin_ge_25c","year":1977,"days":6,"first":"1977-07-04","last":"1977-08-27","longest_streak":3},{"threshold":"tmin_ge_25c","year":1980,"days":1,"first":"1980-07-15","last":"1980-07-15","longest_streak":1},{"threshold":"tmin_ge_25c","year":1981,"days":1,"first":"1981-07-08","last":"1981-07-08","longest_streak":1},{"threshold":"tmin_ge_25c","year":1982,"days":1,"first":"1982-07-17","last":"1982-07-17","longest_streak":1},{"threshold":"tmin_ge_25c","year":1983,"days":1,"first":"1983-07-28","last":"1983-07-28","longest_streak":1},{"threshold":"tmin_ge_25c","year":1984,"days":1,"first":"1984-06-17","last":"1984-06-17","longest_streak":1},{"threshold":"tmin_ge_25c","year":1987,"days":1,"first":"1987-08-01","last":"1987-08-01","longest_streak":1},{"threshold":"tmin_ge_25c","year":1988,"days":6,"first":"1988-08-01","last":"1988-08-17","longest_streak":4},{"threshold":"tmin_ge_25c","year":1990,"days":1,"first":"1990-07-04","last":"1990-07-04","longest_streak":1},{"threshold":"tmin_ge_25c","year":1994,"days":2,"first":"1994-06-15","last":"1994-07-05","longest_streak":1},{"threshold":"tmin_ge_25c","year":1995,"days":4,"first":"1995-07-13","last":"1995-08-14","longest_streak":2},{"threshold":"tmin_ge_25c","year":1999,"days":3,"first":"1999-07-04","last":"1999-07-30","longest_streak":2},{"threshold":"tmin_ge_25c","year":2002,"days":1,"first":"2002-07-21","last":"2002-07-21","longest_streak":1},{"threshold":"tmin_ge_25c","year":2005,"days":1,"first":"2005-07-24","last":"2005-07-24","longest_streak":1},{"threshold":"tmin_ge_25c","year":2006,"days":3,"first":"2006-07-30","last":"2006-08-02","longest_streak":2},{"threshold":"tmin_ge_25c","year":2009,"days":1,"first":"2009-08-09","last":"2009-08-09","longest_streak":1},{"threshold":"tmin_ge_25c","year":2010,"days":1,"first":"2010-07-05","last":"2010-07-05","longest_streak":1},{"threshold":"tmin_ge_25c","year":2011,"days":2,"first":"2011-07-18","last":"2011-07-19","longest_streak":2},{"threshold":"tmin_ge_25c","year":2012,"days":9,"first":"2012-05-28","last":"2012-07-23","longest_streak":4},{"threshold":"tmin_ge_25c","year":2013,"days":3,"first":"2013-07-18","last":"2013-09-10","longest_streak":1},{"threshold":"tmin_ge_25c","year":2014,"days":1,"first":"2014-06-17","last":"2014-06-17","longest_streak":1},{"threshold":"tmin_ge_25c","year":2018,"days":3,"first":"2018-06-17","last":"2018-08-27","longest_streak":1},{"threshold":"tmin_ge_25c","year":2019,"days":1,"first":"2019-07-19","last":"2019-07-19","longest_streak":1},{"threshold":"tmin_ge_25c","year":2020,"days":3,"first":"2020-07-18","last":"2020-08-28","longest_streak":2},{"threshold":"tmin_ge_25c","year":2021,"days":1,"first":"2021-07-06","last":"2021-07-06","longest_streak":1},{"threshold":"tmin_ge_25c","year":2023,"days":1,"first":"2023-08-23","last":"2023-08-23","longest_streak":1},{"threshold":"tmin_ge_25c","year":2024,"days":3,"first":"2024-06-17","last":"2024-08-26","longest_streak":2},{"threshold":"tmin_ge_25c","year":2025,"days":5,"first":"2025-06-21","last":"2025-08-10","longest_streak":3},{"threshold":"tmin_ge_25c","year":2026,"days":5,"first":"2026-06-30","last":"2026-09-03","longest_streak":3}]}