Contiguous U.S. 48-Month Period Ending in December Average Temperature
Degrees Fahrenheit
1901-1924
-99
189812
51.33
-0.22
189912
51.50
-0.05
190012
51.69
0.14
190112
51.77
0.22
190212
51.81
0.26
190312
51.72
0.17
190412
51.31
-0.24
190512
51.09
-0.46
190612
51.13
-0.42
190712
51.34
-0.21
190812
51.57
0.02
190912
51.68
0.13
191012
51.85
0.30
191112
51.99
0.44
191212
51.53
-0.02
191312
51.56
0.01
191412
51.41
-0.14
191512
51.27
-0.28
191612
51.42
-0.13
191712
51.05
-0.50
191812
51.06
-0.49
191912
51.08
-0.47
192012
51.14
-0.41
192112
52.07
0.52
192212
52.11
0.56
192312
52.14
0.59
192412
52.01
0.46