Mean Rate of Change ( °C / Century )

Since: 1760 1810 1860 1910 1960 1990
Tonga - - - 0.98
± 0.24
1.34
± 0.43
1.88
± 0.85

Regional Climate Variability

Difference from Global Land Average ( °C, 95% range )

Smoothing Monthly Annual Five-year Ten-year Twenty-year
± 1.14 ± 0.59 ± 0.34 ± 0.25 ± 0.16

Correlation to Global Land Average (R value)

Smoothing Monthly Annual Five-year Ten-year Twenty-year
0.53 0.78 0.91 0.94 0.97

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

Jan Feb Mar Apr May Jun
± 0.79 ± 0.88 ± 0.78 ± 0.82 ± 0.92 ± 1.10
Jul Aug Sep Oct Nov Dec
± 1.11 ± 1.01 ± 1.19 ± 1.13 ± 0.99 ± 0.91

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature