Local Climate Change: 39.38 N, 76.99 W

Country:	United States
Latitude:	39.3836 N
Longitude:	76.9942 W
Nearby Cities:	Baltimore, Washington, Arlington, Alexandria, Columbia, Silver Spring

Climate Stripes

Mean Rate of Change ( °C / Century )

Since:	1760	1810	1860	1910	1960	1990
Current Location	0.43 ± 0.23	0.72 ± 0.25	0.92 ± 0.18	0.92 ± 0.09	2.62 ± 0.20	3.03 ± 0.45
District of Columbia	0.43 ± 0.23	0.72 ± 0.25	0.92 ± 0.18	0.92 ± 0.09	2.62 ± 0.20	3.03 ± 0.45
Maryland	0.43 ± 0.24	0.71 ± 0.26	0.90 ± 0.18	0.90 ± 0.09	2.65 ± 0.16	2.97 ± 0.46
West Virginia	0.35 ± 0.23	0.58 ± 0.31	0.84 ± 0.20	0.78 ± 0.10	2.64 ± 0.17	2.52 ± 0.43
Virginia	0.36 ± 0.25	0.58 ± 0.33	0.79 ± 0.22	0.74 ± 0.08	2.62 ± 0.16	2.38 ± 0.55
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
	± 3.03	± 1.04	± 0.50	± 0.35	± 0.24

Correlation to Global Land Average (R value)

Smoothing	Monthly	Annual	Five-year	Ten-year	Twenty-year
	0.38	0.67	0.86	0.91	0.94

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

Jan	Feb	Mar	Apr	May	Jun
± 4.40	± 4.18	± 3.66	± 2.57	± 2.51	± 2.21
Jul	Aug	Sep	Oct	Nov	Dec
± 2.17	± 1.89	± 2.37	± 2.73	± 2.85	± 3.80

History of Temperature Stations

Evolution of Climate Extremes

Mean of Daily High Temperature

Mean of Daily Low Temperature

Change in Diurnal Range