Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
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
± 1.14 ± 0.51 ± 0.33 ± 0.27 ± 0.22

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.58 0.85 0.93 0.95 0.97

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

Jan Feb Mar Apr May Jun
± 1.36 ± 1.17 ± 1.12 ± 0.93 ± 0.86 ± 0.85
Jul Aug Sep Oct Nov Dec
± 0.81 ± 0.71 ± 0.72 ± 0.81 ± 1.06 ± 1.35

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature