The conversion

125°C = 257°F

°F = (°C × 9/5) + 32, so (125 × 9/5) + 32 = 257.

125 °C is well outside the range outdoor air occupies on Earth, so there is no useful weather description for it — this page is arithmetic rather than a forecast.

Convert something else

68°F

The range either side

Neighbouring values, for when the number you actually wanted was a degree or two away.

Celsius to Fahrenheit either side of 125 °C.
CelsiusFahrenheit
120 °C248 °F
121 °C249.8 °F
122 °C251.6 °F
123 °C253.4 °F
124 °C255.2 °F
125 °C257 °F
126 °C258.8 °F
127 °C260.6 °F
128 °C262.4 °F
129 °C264.2 °F
130 °C266 °F

The other direction

257 °F converts back to 125 °C, which is the same relationship read the other way. Going from Fahrenheit to Celsius, subtract 32 first and then multiply by 5/9 — doing it in the other order is the usual mistake and produces a plausible-looking wrong answer.

The full converter handles any value, in either direction, including kelvin, and shows the formula as it works.