The yearly average temperature of USA has stayed constant in 120 years

10.5 11.0 11.5 12.0 12.5 13.0 1900.0 1910.0 1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0 2010.0 2020.0

Table of plotted data

YearNumber of stationsYearly mean
1900 370 12.06
1901 372 11.48
1902 388 11.54
1903 430 11.38
1904 445 11.05
1905 468 11.45
1906 476 11.84
1907 464 11.48
1908 502 12.31
1909 536 11.75
1910 553 12.12
1911 600 12.32
1912 597 10.99
1913 612 11.94
1914 618 11.70
1915 639 11.62
1916 644 11.29
1917 662 10.62
1918 639 11.90
1919 629 11.79
1920 622 11.41
1921 653 12.73
1922 662 11.98
1923 674 11.48
1924 710 10.79
1925 694 12.08
1926 712 11.59
1927 717 11.69
1928 743 11.59
1929 747 11.04
1930 752 11.89
1931 801 12.78
1932 817 11.68
1933 828 12.32
1934 826 12.75
1935 834 11.73
1936 814 11.81
1937 814 11.42
1938 848 12.59
1939 861 12.51
1940 865 11.46
1941 881 12.28
1942 847 11.73
1943 859 11.81
1944 864 11.87
1945 862 11.62
1946 850 12.31
1947 827 11.60
1948 803 11.32
1949 809 11.96
1950 851 11.36
1951 894 11.24
1952 892 12.14
1953 889 12.59
1954 904 12.43
1955 911 11.72
1956 913 11.82
1957 923 11.75
1958 922 11.67
1959 923 11.89
1960 959 11.37
1961 947 11.68
1962 981 11.61
1963 979 11.69
1964 952 11.72
1965 965 11.62
1966 988 11.51
1967 1000 11.56
1968 957 11.40
1969 991 11.38
1970 1013 11.57
1971 999 11.59
1972 961 11.38
1973 879 11.95
1974 959 11.74
1975 963 11.44
1976 944 11.24
1977 947 11.93
1978 900 11.01
1979 914 11.10
1980 918 11.82
1981 957 12.05
1982 966 11.24
1983 980 11.58
1984 975 11.69
1985 963 11.23
1986 967 12.21
1987 975 12.24
1988 983 11.71
1989 983 11.23
1990 1000 12.47
1991 1006 12.19
1992 971 11.54
1993 978 11.05
1994 954 11.78
1995 957 11.73
1996 955 11.18
1997 933 11.45
1998 913 12.74
1999 920 12.24
2000 862 11.76
2001 864 12.14
2002 855 11.94
2003 859 11.79
2004 829 11.71
2005 769 12.03
2006 807 12.45
2007 783 11.95
2008 759 11.05
2009 722 11.18
2010 744 11.68
2011 757 11.74
2012 725 13.04
2013 715 11.25
2014 700 11.22
2015 700 12.15
2016 679 12.49
2017 664 12.22
2018 652 11.78

 

For each year those stations are used for which nowhere more then 4 consecutive days are missing in the data reporting

Computations by Mats Rosengren (Twitter:@stamcose)