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

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

Local Climate Variabiity

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