Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
Mexico - - 0.58
± 0.17
0.68
± 0.15
1.58
± 0.29
1.98
± 0.55
Central America - - 0.63
± 0.16
0.72
± 0.13
1.55
± 0.25
1.49
± 0.44
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
± 1.32 ± 0.58 ± 0.38 ± 0.32 ± 0.27

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.51 0.80 0.91 0.93 0.94

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

Jan Feb Mar Apr May Jun
± 1.61 ± 1.42 ± 1.34 ± 1.13 ± 1.01 ± 0.97
Jul Aug Sep Oct Nov Dec
± 0.91 ± 0.83 ± 0.82 ± 0.92 ± 1.26 ± 1.57

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature