This program plots time series of monthly total precipitation,
or monthly average temperature, based on divisional climate data
for the U.S. The user selects the quantity (precipitation or
temperature) and the beginning and ending year (begins with
January of the beginning year and ends with December of the
ending year). Generally, periods of 10 years or less are
depicted the best. Longer periods tend to be difficult to
interpret. For plotting purposes, the data are plotted on the
ending year and month of the specified interval. The individual
months are shown by red X's and lines. The running mean is
simply the average of the selected number of months centered on
the plotted month. An odd number of months will be plotted
centered on an actual month, and an even number of months will
be plotted in between month values (for example, the 12-month
mean for points from January 1996 through December 1996 will be
plotted in mid-June 1996). Although individual months before
January of the beginning year aren't shown