Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
Canada - 0.98
± 0.26
1.31
± 0.26
1.50
± 0.18
3.64
± 0.24
6.50
± 0.43
North America - 0.82
± 0.23
1.02
± 0.18
1.11
± 0.11
2.90
± 0.19
4.72
± 0.28
Northern Hemisphere - 0.79
± 0.16
0.96
± 0.10
1.19
± 0.05
2.56
± 0.20
3.56
± 0.20
Global Land 0.43
± 0.18
0.79
± 0.13
0.91
± 0.08
1.11
± 0.03
2.16
± 0.11
2.78
± 0.13

Regional Climate Variability

Difference from Global Land Average ( °C, 95% range )

Smoothing Monthly Annual Five-year Ten-year Twenty-year
± 2.49 ± 1.00 ± 0.49 ± 0.37 ± 0.29

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.63 0.83 0.95 0.97 0.98

Variability in Monthly Means ( °C, 95% range )

Jan Feb Mar Apr May Jun
± 3.93 ± 4.03 ± 3.50 ± 2.92 ± 2.11 ± 1.78
Jul Aug Sep Oct Nov Dec
± 1.36 ± 1.40 ± 1.69 ± 2.36 ± 3.14 ± 3.89

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature