To find the difference in temperature between the average high and average low in Glendale, Arizona, you subtract the average low temperature from the average high temperature:
\[ \text{Difference} = \text{Average High} - \text{Average Low} = 67^\circ F - 43^\circ F \]
Calculating this gives:
\[ \text{Difference} = 67 - 43 = 24 \]
So, the difference in temperature is 24°F.