Coldest White Sox games at first pitch per baseball reference.com:
TEMP—-DATE, W/L (PITCHER OF RECORD)
31—April 4, 2007, L (Thornton)
31—April 7, 2007, W (Vazquez)
32—April 7, 1977, L (Brett)
32—April 5, 2003, W (Buehrle)
32—April 9, 2016, W (Sale)
32—April 7, 2018, L (Giolito)