The conversion

250°F = 121.11°C

°C = (°F − 32) × 5/9, so (250 − 32) × 5/9 = 121.11.

250 °F 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.

Fahrenheit to Celsius either side of 250 °F.
FahrenheitCelsius
245 °F118.33 °C
246 °F118.89 °C
247 °F119.44 °C
248 °F120 °C
249 °F120.56 °C
250 °F121.11 °C
251 °F121.67 °C
252 °F122.22 °C
253 °F122.78 °C
254 °F123.33 °C
255 °F123.89 °C

The other direction

121.11 °C converts back to 250 °F, which is the same relationship read the other way. Going from Celsius to Fahrenheit, multiply by 9/5 first and then add 32. Adding first is the usual mistake.

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