0 Celsius = 32 degrees Fahrenheit
6.1 Celsius = 42.98 Fahrenheit
12.7 Celsius = 54.86 Fahrenheit
19.2 Celsius = 66.56 Fahrenheit
25.7 Celsius = 78.26 Fahrenheit
Hurricanes need above 79 degrees for fuel. Judging by the cooling Earth past 6 months with Sea and Land temps cooling, the waters need to warm up quick for hurricanes.