Average monthly temperatures small test data
January 2006 through December 2007, n=24

-1.0    -0.5    1.0    10.0    10.0    20.0    20.0    20.0    20.0    10.0    0.0    1.0
-2.0    -3.0    2.0    10.0    15.0    20.0    20.0    20.0    20.0    10.0    0.0    1.0