To find the difference in temperature between 37 degrees Fahrenheit during the day and -14 degrees Fahrenheit at night, you can use the formula:
\[ \text{Difference} = \text{Day Temperature} - \text{Night Temperature} \]
Substituting in the values:
\[ \text{Difference} = 37 - (-14) \]
This simplifies to:
\[ \text{Difference} = 37 + 14 = 51 \text{ degrees F} \]
Thus, the difference in temperature is 51 degrees F.