Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
Sri Lanka - 0.67
± 0.16
0.65
± 0.20
0.80
± 0.12
1.37
± 0.28
1.65
± 0.59
Southern Asia - 0.73
± 0.19
0.80
± 0.18
1.16
± 0.12
2.29
± 0.25
3.70
± 0.38
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
± 0.95 ± 0.43 ± 0.29 ± 0.25 ± 0.21

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.73 0.90 0.95 0.96 0.97

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

Jan Feb Mar Apr May Jun
± 0.91 ± 1.00 ± 0.89 ± 0.83 ± 0.95 ± 0.84
Jul Aug Sep Oct Nov Dec
± 0.76 ± 0.67 ± 0.88 ± 0.76 ± 0.65 ± 0.81

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature