Plot time series data

[schniefen]

I have a long list of data looking like this:

   

Minute and Second are always zero since the data is the 1 hour average of a measurement, which is the last column. I would like to plot this data. If there was only two columns, date and measurement, then I would simply do:

import pandas as pd
import matplotlib.pyplot as plt
df=pd.read_csv('data.csv')
plt.plot(df)

So I am considering to rewrite the dataframe, however, I am unsure if this approach will work. Appreciate any feedback.