Answer
Slope interpretation: if the temperature increases $1°F$, it is expected that the number of chirps per second will increase by 0.2119.
The interpretation for $o°F$ does not make sense.
Work Step by Step
Notice that the lowest temperature is $69.4°F$ and the themperature range is $93.3°F-69.4°F=23.9°F$. So, $0°F$ is far from the smallest observed temperature and we can not use this regression model to predict the number of chirps per second for $0°F$.