Final answer:
The temperature in the afternoon was 32 degrees Fahrenheit.
Step-by-step explanation:
To find the temperature in the afternoon, we need to add the change in temperature to the low temperature recorded in the morning. The change in temperature is given as 42 degrees higher, which means we add 42 to -10.
Therefore, the temperature in the afternoon is -10 + 42 = 32 degrees Fahrenheit.