The conversion

100°C = 212°F

°F = (°C × 9/5) + 32, so (100 × 9/5) + 32 = 212.

100 °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 100 °C.
CelsiusFahrenheit
95 °C203 °F
96 °C204.8 °F
97 °C206.6 °F
98 °C208.4 °F
99 °C210.2 °F
100 °C212 °F
101 °C213.8 °F
102 °C215.6 °F
103 °C217.4 °F
104 °C219.2 °F
105 °C221 °F

The other direction

212 °F converts back to 100 °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.