text: import json
  
  f = open('wbb.json', 'r')
  wbb_json = f.read()
  f.close()
  
  wbb = json.loads(wbb_json)
  
  print(wbb.keys())
  
  dates = wbb['STATION'][0]['OBSERVATIONS']['date_time']
  air_temps = wbb['STATION'][0]['OBSERVATIONS']['air_temp_set_1']
  
  #find min temp
  
  import numpy as np
  
  t = np.array(air_temps, dtype=np.float)
  min_temp = t.min()
  
  print('min temp is', min_temp)
  
  idx = np.argmin(t)
  
  print('min temp is %s at %s' % (t[idx], dates[idx] ) )
  
  