To convert Fahrenheit to Celsius, you can use the formula:
\[ C = \frac{5}{9}(F - 32) \]
where \( F \) is the temperature in Fahrenheit and \( C \) is the temperature in Celsius.
Now, substituting the given value:
\[ F = 149°F \]
\[ C = \frac{5}{9}(149 - 32) \]
\[ C = \frac{5}{9}(117) \]
\[ C = \frac{585}{9} \]
\[ C = 65°C \]
So the equivalent temperature in Celsius of 149°F is 65°C.