Weather report: What's that 61 and 63 doing in there?

What's that 63 and 61 doing in there? Here's the past week's high and low temperatures, plus precipitation and snowfall, according to Guy Verhoff, Icon weather observer.
                High   Low    Prec.    Snow
March 5      35     28     0.38     3.1
March 6      37     27     0.04     0.8
March 7      40     29                 trace
March 8      43     24
March 9      49     29
March 10    63     45
March 11    61     36     0.26