Iterating over a list parsed over from a cvs. column

I am trying to iterate over a list that contains temperatures. Appending the data/temperatures from a csv file to a list data structure was a not an issue. The problem occures when i want to count the occurences of temperatures above 6. I was print-testing.

I get an error due to the first element in the csv.column is a variable "SDK", which denotes the temperatures. How can 'bypass' the first value ("SDK") in that column? As I only want/need to iterate over the integers.

The code:

def sunshine(file):
    with open(file,'r') as csv_file:
        lines = csv_file.readlines()

    temperaturesDays = []
    for line in lines:
        data = line.split(',')
        temperaturesDays.append(data[8])
    return temperaturesDays

    #print(temperaturesDays)


daily_sunshine_duration = sunshine('berlin.csv')
#print(daily_sunshine_duration) #works, print temps

for i in daily_sunshine_duration:
    if i < 6:
        print(i)

Within data[8] you do not only have integer values. You could either go for try...except as in:

temperaturesDays = []
for line in lines:
    data = line.split(',')
    try:
        temperaturesDays.append(int(data[8]))
    except:
        pass
return temperaturesDays

... or check/cast it elsewhere (e.g. float(...), isinstance(...)).
Without real sample values it is hard to guess though.