DatasetWeatherTokyoMeanAirTemperatureLibrary   "DatasetWeatherTokyoMeanAirTemperature" 
Provides a data set of the monthly mean air temperature (°C) for the city of Tokyo in Japan.
this was just for fun, no financial implications in this.
reference:
www.data.jma.go.jp
TOKYO   WMO Station ID:47662 Lat 35o41.5'N  Lon 139o45.0'E
 year_() 
  the years of the data set.
  Returns: array : year values.
 january() 
  the january values of the dataset
  Returns: array\ : data values for january.
 february() 
  the february values of the dataset
  Returns: array\ : data values for february.
 march() 
  the march values of the dataset
  Returns: array\ : data values for march.
 april() 
  the april values of the dataset
  Returns: array\ : data values for april.
 may() 
  the may values of the dataset
  Returns: array\ : data values for may.
 june() 
  the june values of the dataset
  Returns: array\ : data values for june.
 july() 
  the july values of the dataset
  Returns: array\ : data values for july.
 august() 
  the august values of the dataset
  Returns: array\ : data values for august.
 september() 
  the september values of the dataset
  Returns: array\ : data values for september.
 october() 
  the october values of the dataset
  Returns: array\ : data values for october.
 november() 
  the november values of the dataset
  Returns: array\ : data values for november.
 december() 
  the december values of the dataset
  Returns: array\ : data values for december.
 annual() 
  the annual values of the dataset
  Returns: array\ : data values for annual.
 select_month(idx) 
  get the temperature values for a specific month.
  Parameters:
     idx : int, month index (1 -> 12 | any other value returns annual average values).
  Returns: array\ : data values for selected month.
 select_value(year_, month_) 
  get the temperature value of a specified year and month.
  Parameters:
     year_ : int, year value.
     month_ : int, month index (1 -> 12 | any other value returns annual average values).
  Returns: float : value of specified year and month.
 diff_to_median(month_) 
  the difference of the month air temperature (ºC) to the median of the sample.
  Parameters:
     month_ : int, month index (1 -> 12 | any other value returns annual average values).
  Returns: float : difference of current month to median in (Cº)
