temperature.py

# coding: utf-8
import csv
from collections import Counter
from pprint import pprint

with open('./440801.csv') as f:
  # data from 
    obs = []
    csv = csv.DictReader(f)
    for line in csv:
        obs.append(line)

temps = Counter()

for date in obs:
    mint = .18*int(date.get('TMIN'))+32
    maxt = .18*int(date.get('TMAX'))+32

    for temp in range(0,100):
        if mint < temp < maxt:
            temps[temp] += 1

print temps.most_common(1)[0][1]/float(len(obs))