Meridian is in the humid subtropical climate zone . The average high temperature during summer ( June through August ) is around 90 ° F ( 32 ° C ) and the average low is around 70 ° F ( 21 ° C ) . In winter ( December through February ) the average maximum is around 60 ° F ( 16 ° C ) and minimum 35 ° F ( 2 ° C ) . The warmest month is July , with an average high of 92 @.@ 9 ° F ( 33 @.@ 8 ° C ) , and the coldest month of the year is January with an average low of 34 @.@ 7 ° F ( 1 @.@ 5 ° C ) .