Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
British Columbia - - 0.94
± 0.20
1.15
± 0.10
2.34
± 0.19
-0.04
± 0.32
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
± 3.25 ± 1.21 ± 0.57 ± 0.39 ± 0.25

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.41 0.67 0.86 0.92 0.96

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

Jan Feb Mar Apr May Jun
± 5.66 ± 4.90 ± 3.48 ± 2.40 ± 1.92 ± 1.79
Jul Aug Sep Oct Nov Dec
± 1.55 ± 1.65 ± 1.89 ± 2.13 ± 4.30 ± 4.82

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature