The highest is  in Fort Yukon (which is just  inside the arctic circle) on June 27, 1915, making Alaska tied with Hawaii as the state with the lowest high temperature in the United States.
ðə hˈaɪɪst ɪz ɪn fˈɔːɹt jˈuːkən wˌɪtʃ ɪz dʒˈʌst ɪnsˈaɪd ðɪ ˈɑːɹktɪk sˈɜːkəl ˌɔn dʒˈuːn twˈɛnti sˈɛvən, nˈaɪntiːnhˈʌndɹɪd fˈɪftiːn, mˌeɪkɪŋ ɐlˈæskə tˈaɪd wɪð həwˈaɪiː æz ðə stˈeɪt wɪððə lˈoʊɪst hˈaɪ tˈɛmpɹɪtʃɚɹ ɪnðə juːnˈaɪɾᵻd stˈeɪts.