Ontario

Climate Stripes

Mean Rate of Change ( °C / Century )

Since:	1760	1810	1860	1910	1960	1990
Ontario	0.56 ± 0.25	1.02 ± 0.23	1.41 ± 0.20	1.51 ± 0.13	3.31 ± 0.34	6.84 ± 0.77
Canada	-	0.98 ± 0.26	1.31 ± 0.26	1.50 ± 0.18	3.64 ± 0.24	6.50 ± 0.43
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

Temperature Record Months and Years

Seasonal Changes

Regional Climate Variability

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

Smoothing	Monthly	Annual	Five-year	Ten-year	Twenty-year
	± 3.21	± 1.24	± 0.60	± 0.43	± 0.35

Correlation to Global Land Average (R value)

Smoothing	Monthly	Annual	Five-year	Ten-year	Twenty-year
	0.54	0.75	0.89	0.94	0.95

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

Jan	Feb	Mar	Apr	May	Jun
± 4.50	± 4.63	± 4.45	± 3.46	± 3.05	± 2.67
Jul	Aug	Sep	Oct	Nov	Dec
± 2.29	± 2.06	± 2.36	± 3.10	± 3.65	± 4.82

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature

Change in Diurnal Range