ɔnðɪ ˈʌðɚ hˈænd, ɐ ɹᵻvjˈuː ʌv kjˈuː ɡˈɑːɹdənz dˈeɪɾə fɹʌm nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wˈʌn tə nˈaɪntiːnhˈʌndɹɪd sˈɪksti nˈaɪn ʃˈoʊd ðæt θˈɜːtiːn mˈeɪ wʌz jˈuːʒuːəli ðə wˈɔːɹmɪst dˈeɪ ʌvðə mˈʌnθ, ænd wʌz fˈɑːloʊd baɪ ɐ ʃˈɑːɹp dɹˈɑːp ɪn tˈɛmpɹɪtʃɚ.
On the other hand, a review of Kew Gardens data from 1941 to 1969 showed that 13 May was usually the warmest day of the month, and was followed by a sharp drop in temperature.