Normal Water Temperatures for Kentucky Lake
Murray State University's Hancock Biological Station has a water quality monitoring station. These average water temperatures were gathered at Ledbetter Bay at about five feet under the surface. This data reflects a ten-year average.
| Time Period | Water Temp | Time Period | Water Temp |
| January | 44-46° | Late July | 85° |
| Late February | 45-47° | Early August | 86° |
| Early March | 47-50° | Mid August | 85-86° |
| Mid March | 50-54° | Late August | 83-84° |
| Late March | 54-56° | Early September | 81-83° |
| Early April | 57-60° | Mid September | 78-80° |
| Mid April | 61-64° | Late September | 76-78° |
| Late April | 64-67° | Early October | 73-75° |
| Early May | 67-70° | Mid October | 69-72° |
| Mid May | 70-72° | Late October | 63-67° |
| Late May | 72-76° | Early November | 60-62° |
| Early June | 77-79° | Mid November | 56-60° |
| Mid June | 79-82° | Late November | 53-56° |
| Late June | 83-84° | Early December | 49-52° |
| Early July | 84-85° | Mid December | 47-49° |
| Mid July | 85° | Late December | 46-47° |
