import csv
import itertools


def setup_temperature_csv(csv_location):
    """Return a list of CSV values containing day & temperature data. The index
of the list represents the day of the year, and the value at that index represents
the temperature at that day.
    """
    with open(csv_location) as csvfile:
        reader = csv.DictReader(csvfile)
        rows = [list(itertools.repeat(float(row['Celsius']), 24)) for row in reader]
    return rows