Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
Syria - 0.78
± 0.19
0.85
± 0.15
1.11
± 0.13
1.95
± 0.19
5.45
± 0.62
Asia - 0.82
± 0.18
1.00
± 0.15
1.35
± 0.09
2.57
± 0.24
3.13
± 0.25
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
± 2.19 ± 0.90 ± 0.37 ± 0.26 ± 0.19

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.50 0.75 0.93 0.96 0.97

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

Jan Feb Mar Apr May Jun
± 2.81 ± 2.86 ± 2.87 ± 2.25 ± 2.02 ± 1.50
Jul Aug Sep Oct Nov Dec
± 1.42 ± 1.47 ± 1.75 ± 2.19 ± 2.53 ± 2.72

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature