| St. Louis, MO - ANNUAL TOTAL PRECIPITATION | |||||||
| YEAR | TOTAL | YEAR | TOTAL | YEAR | TOTAL | YEAR | TOTAL |
| 1837 | 27.01 | 1870 | 27.08 | 1920 | 31.53 | 1970 | 36.20 |
| 1838 | 31.51 | 1871 | 23.38 | 1921 | 41.10 | 1971 | 33.73 |
| 1839 | 47.44 | 1872 | 30.47 | 1922 | 32.34 | 1972 | 33.74 |
| 1840 | 41.65 | 1873 | 45.50 | 1923 | 41.69 | 1973 | 39.82 |
| 1841 | 42.73 | 1874 | 37.88 | 1924 | 36.51 | 1974 | 36.83 |
| 1842 | 32.31 | 1875 | 43.00 | 1925 | 32.23 | 1975 | 40.21 |
| 1843 | 34.79 | 1876 | 48.46 | 1926 | 33.35 | 1976 | 23.46 |
| 1844 | 45.81 | 1877 | 41.43 | 1927 | 50.83 | 1977 | 43.41 |
| 1845 | 37.99 | 1878 | 40.83 | 1928 | 38.61 | 1978 | 37.71 |
| 1846 | 45.45 | 1879 | 25.70 | 1929 | 46.30 | 1979 | 29.48 |
| 1847 | 52.72 | 1880 | 34.66 | 1930 | 23.23 | 1980 | 27.48 |
| 1848 | 65.36 | 1881 | 37.37 | 1931 | 37.39 | 1981 | 45.52 |
| 1849 | 45.71 | 1882 | 43.15 | 1932 | 38.01 | 1982 | 54.97 |
| 1850 | 50.50 | 1883 | 40.10 | 1933 | 34.77 | 1983 | 44.80 |
| 1851 | 46.84 | 1884 | 40.64 | 1934 | 30.22 | 1984 | 51.65 |
| 1852 | 46.96 | 1885 | 45.59 | 1935 | 39.36 | 1985 | 50.73 |
| 1853 | 30.89 | 1886 | 44.35 | 1936 | 25.74 | 1986 | 34.88 |
| 1854 | 40.63 | 1887 | 35.30 | 1937 | 36.85 | 1987 | 38.38 |
| 1855 | 50.37 | 1888 | 41.17 | 1938 | 37.49 | 1988 | 33.93 |
| 1856 | 42.58 | 1889 | 33.16 | 1939 | 36.56 | 1989 | 28.60 |
| 1857 | 39.03 | 1890 | 37.69 | 1940 | 24.73 | 1990 | 45.09 |
| 1858 | 68.83 | 1891 | 30.53 | 1941 | 31.37 | 1991 | 33.48 |
| 1859 | 61.40 | 1892 | 41.62 | 1942 | 41.64 | 1992 | 33.49 |
| 1860 | 29.79 | 1893 | 39.28 | 1943 | 37.53 | 1993 | 54.76 |
| 1861 | 38.03 | 1894 | 27.44 | 1944 | 34.90 | 1994 | 34.70 |
| 1862 | 44.00 | 1895 | 31.20 | 1945 | 47.55 | 1995 | 41.68 |
| 1863 | 40.45 | 1896 | 37.55 | 1946 | 50.31 | 1996 | 43.67 |
| 1864 | 37.61 | 1897 | 40.17 | 1947 | 35.78 | 1997 | 31.23 |
| 1865 | 46.87 | 1898 | 49.20 | 1948 | 42.26 | 1998 | 43.62 |
| 1866 | 43.20 | 1899 | 34.69 | 1949 | 45.76 | 1999 | 34.06 |
| 1867 | 37.76 | 1900 | 29.51 | 1950 | 37.63 | 2000 | 37.37 |
| 1868 | 45.59 | 1901 | 24.80 | 1951 | 36.37 | 2001 | 35.29 |
| 1869 | 46.97 | 1902 | 38.63 | 1952 | 25.67 | 2002 | 40.95 |
| 1903 | 33.81 | 1953 | 20.69 | 2003 | 46.06 | ||
| Above records | 1904 | 33.71 | 1954 | 27.61 | 2004 | 42.27 | |
| (1837 -1869) | 1905 | 38.54 | 1955 | 31.33 | 2005 | 37.85 | |
| are considered | 1906 | 35.52 | 1956 | 34.43 | |||
| unofficial | 1907 | 41.39 | 1957 | 47.16 | |||
| 1908 | 34.19 | 1958 | 37.38 | ||||
| 1909 | 47.50 | 1959 | 28.31 | ||||
| 1910 | 37.31 | 1960 | 31.78 | ||||
| 1911 | 36.13 | 1961 | 41.20 | ||||
| 1912 | 44.59 | 1962 | 34.63 | ||||
| 1913 | 38.68 | 1963 | 28.62 | ||||
| 1914 | 35.63 | 1964 | 32.16 | ||||
| 1915 | 49.28 | 1965 | 28.26 | ||||
| 1916 | 41.80 | 1966 | 32.34 | ||||
| 1917 | 25.00 | 1967 | 41.30 | ||||
| 1918 | 35.91 | 1968 | 32.49 | ||||
| 1919 | 40.79 | 1969 | 43.72 | ||||
| Average over the entire period of record: | 38.93 | ||||||