Pennsylvania

Climate Stripes

Mean Rate of Change ( °C / Century )

Since:	1760	1810	1860	1910	1960	1990
Pennsylvania	0.47 ± 0.22	0.78 ± 0.22	1.00 ± 0.17	1.01 ± 0.11	2.79 ± 0.19	3.63 ± 0.41
Contiguous United States	-	0.66 ± 0.25	0.76 ± 0.18	0.87 ± 0.08	2.16 ± 0.16	2.76 ± 0.36
United States	-	0.69 ± 0.24	0.80 ± 0.16	0.89 ± 0.08	2.36 ± 0.13	2.42 ± 0.39
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
	± 3.11	± 1.08	± 0.52	± 0.35	± 0.24

Correlation to Global Land Average (R value)

Smoothing	Monthly	Annual	Five-year	Ten-year	Twenty-year
	0.39	0.68	0.86	0.92	0.95

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

Jan	Feb	Mar	Apr	May	Jun
± 4.51	± 4.25	± 3.87	± 2.66	± 2.68	± 2.30
Jul	Aug	Sep	Oct	Nov	Dec
± 2.18	± 1.94	± 2.35	± 2.80	± 2.90	± 3.95

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature

Change in Diurnal Range