code: def get_weather_forecast_days(self, latitude, longitude,
              days=1, frequency=1, reading_type=None):
          
          params = {}
  
          # Can get data from NWS1 or NWS3 representing 1-hr and 3-hr
          # intervals.
          if frequency not in [1, 3]:
              raise ValueError("Reading frequency must be 1 or 3")
  
          params['days'] = days
          params['source'] = 'NWS' + str(frequency)
          params['latitude'] = latitude
          params['longitude'] = longitude
  
          if reading_type:
              # url encoding will make spaces a + instead of %20, which service
              # interprets as an "and" search which is undesirable
              reading_type = reading_type.replace(' ', '%20')
              params['reading_type'] = urllib.quote_plus(reading_type)
  
          url = self.uri + '/v1/weather-forecast-days/'
          return self.service._get(url, params=params)
docs: Return the weather forecast for a given location.
  
          ::
  
              results = ws.get_weather_forecast_days(lat, long)
              for w in results['hits']:
                  print w['start_datetime_local']
                  print w['reading_type'], w['reading_value']
  
          For description of reading types:
          https://graphical.weather.gov/xml/docs/elementInputNames.php