«وَتَجِدُّ فِي تَمُّوزَ مَسَّ الْبَرْدِ»
It feels the touch of cold even in the heat of Tammūz.
Tammūz evokes the summer heat. The surprising opposition of heat and cold deepens the riddle. Its point is not a weather report but an imaginative way of describing the implement.