Extracting specific months of multiple years in DataFrames

Hello, I have a DataFrame with weather data for every day over a span of 10 years. I’m trying to calculate the monthly average temperature for the month of June of each year, so that I end up with 10 temperature values I can plot in a diagram. I have already converted the given date format into DateTime yyyy-mm-dd so that it is easier to work with. I’ll try to replicate the code so far here: using GLMakie using DataFrames, CSV, Statistics using Dates #generate example dataset (not sure if t...