The conversion

110°F = 43.33°C

°C = (°F − 32) × 5/9, so (110 − 32) × 5/9 = 43.33.

As an outdoor air temperature, 110 °F sits in the hot band. The other scale is on the dial beside it in the app, so a reading like this needs no conversion at all.

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 110 °F.
FahrenheitCelsius
105 °F40.56 °C
106 °F41.11 °C
107 °F41.67 °C
108 °F42.22 °C
109 °F42.78 °C
110 °F43.33 °C
111 °F43.89 °C
112 °F44.44 °C
113 °F45 °C
114 °F45.56 °C
115 °F46.11 °C

The other direction

43.33 °C converts back to 110 °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.