Jacksonville has a humid subtropical
climate, with mild weather during winters and hot weather during summers. High
temperatures average 64 to 92 °F (18 to 33 °C) throughout the year.
High heat indices are not uncommon for the summer months in the area, with
indices above 110 °F (43.3 °C) possible. The highest temperature
recorded in was 104 °F (40 °C) on July 11, 1879 and July 28, 1872. It
is common for thunderstorms to erupt during a typical summer afternoon. These
are caused by the rapid heating of the land relative to the water, combined
with extremely high
