St. Johns County Profile

Geography

Area: 608 Square Miles
County Seat: St. Augustine
Nearest MSA: Jacksonville MSA
Time Zone: Eastern
Local Area Code(s): 904

 

Climate

Average Temperature: High Low
January: 66 45
July: 91 73
Florida Mean Annual Precipitation: 53
Average Annual Rain Days: 116

 

Population

1980 51,303
1990 83,829
2000 123,148
2010 190,039
2020 273,425
2027* 336,109
% Change 2010-2020 44%

SOURCE:US Census, ESRI 2021 Community Profile