Answer
${{13}^{\circ }}\text{F}$
Work Step by Step
Consider the given table.
From the table, the temperature at a wind speed of $5\,\text{mph}$ for air temperature ${{10}^{\circ }}\text{F}$is ${{1}^{\circ }}\text{F}$.
And, the temperature at a wind speed of $30\,\text{mph}$for air temperature ${{10}^{\circ }}\text{F}$is $-{{12}^{\circ }}\text{F}$.
Difference between the temperatures is,
$\begin{align}
& \text{diff}=1-\left( -12 \right) \\
& =1+12 \\
& =13
\end{align}$
