Here's the updated code:
```python
plt.style.use("Solarize_Light2")
fig, ax = plt.subplots()
ax.plot(austin_weather["MONTH"], austin_weather["MLY-TAVG-NORMAL"])
plt.show()
```
We use `plt.style.use("Solarize_Light2")` to set the plot style to "Solarize_Light2". We then create a new figure and axis using `fig, ax = plt.subplots()`. Finally, we plot the