Actual years

1909 to 2015 = 1.34 °C

1940 to 2015 = 0.79 °C = 59%

1909 to 1940 = 0.55 °C = 41%

 

LOESS version

1909 to 2015 = 1.05 °C

1940 to 2015 = 0.78 °C = 75%

1909 to 1940 = 0.26 °C = 25%