Climate Lower Merion straddles the boundary between a hot-summer humid continental climate (Dfa) and a humid subtropical climate (Cfa). The hardiness zone is 7b. Average monthly temperatures in Gladwyne range from 31.7 °F in January to 76.5 °F in July, in Bryn Mawr they range from 31.4 °F in January to 76.4 °F in July, and at the former location of NBC 10 studios in Bala Cynwyd they range from 32.6 °F in January to 77.4 °F in July.
Climate Lower Merion straddles the boundary between a hot-summer humid continental climate (Dfa) and a humid subtropical climate (Cfa) The hardiness zone is 7b Average monthly temperatures in Gladwyne range from 317 °F in January to 765 °F in July in Bryn Mawr they range from 314 °F in January to 764 °F in July and at the former location of NBC 10 studios in Bala Cynwyd they range from 326 °F in January to 774 °F in July