下面是完整代码:
```python
# Import the matplotlib.pyplot submodule and name it plt
import matplotlib.pyplot as plt
# Create a Figure and an Axes with plt.subplots
fig, ax = plt.subplots()
# Plot MLY-PRCP-NORMAL from seattle_weather against the MONTH
ax.plot(seattle_weather["MONTH"], seattle_weather["MLY-PRCP-NORMAL"])
# Plot MLY-PRCP-NORMAL from austin_weather against MONTH
ax.plot(austin_weather["MONTH"], austin_weather["MLY-PRCP-NORMAL"])
# Call the show function
plt.show()
```