All values are given in inches
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1832 | 4.70 | 1.75 | 0.30 | ||||||||||
| 1833 | 2.20 | 1.50 | 0.50 | 0.85 | 3.35 | 1.90 | 4.30 | 3.10 | 4.45 | 1.03 | 2.08 | 2.30 | 27.56 |
| 1834 | 0.33 | 0.00 | 1.97 | 1.75 | 11.46 | 0.10 | 2.70 | 3.46 | 3.80 | 8.85 | 1.68 | 0.01 | 36.11 |
| 1835 | 2.40 | 0.00 | 0.05 | 1.15 | 3.61 | 3.15 | 3.26 | 5.93 | 5.90 | 0.43 | 1.43 | 2.78 | 30.09 |
| 1836 | 2.35 | 1.18 | 1.45 | 0.60 | 6.95 | 4.40 | 1.10 | 0.70 | 3.25 | 1.65 | 0.53 | 0.25 | 24.41 |
| 1837 | 1.83 | 0.92 | 0.75 | 2.42 | 5.35 | 1.68 | 1.65 | 7.50 | 5.80 | 6.05 | 3.35 | 1.65 | 38.95 |
| 1838 | 0.05 | 0.05 | 0.00 | 0.02 | 0.82 | 4.86 | 1.15 | 3.05 | 3.47 | 0.40 | 5.75 | 0.87 | 20.49 |
| 1839 | |||||||||||||
| 1840 | |||||||||||||
| 1841 | |||||||||||||
| 1842 | |||||||||||||
| 1843 | 1.03 | 1.85 | 1.20 | 2.99 | 4.65 | 6.83 | 0.90 | 1.31 | |||||
| 1844 | 0.32 | 1.23 | 0.13 | 0.05 | 1.36 | 7.13 | 1.26 | 2.63 | 8.50 | 14.07 | 0.44 | 1.28 | 38.40 |
| 1845 | |||||||||||||
| 1846 | |||||||||||||
| 1847 | |||||||||||||
| 1848 | |||||||||||||
| 1849 | 14.60 | 3.26 | 10.18 | ||||||||||
| 1850 | 2.02 | 3.38 | 3.93 | 4.18 | 0.01 | 2.10 | |||||||
| 1851 | 2.40 | 0.88 | 1.50 | 1.80 | 3.89 | 8.19 | 2.78 | 6.78 | 12.37 | 9.23 | 1.55 | 2.32 | 53.69 |
| 1852 | 1.47 | 2.46 | 6.80 | 1.93 | 0.23 | 6.87 | 5.83 | 5.81 | 5.03 | 4.19 | 2.63 | 3.16 | 46.41 |
| 1853 | 2.23 | 0.43 | 10.23 | 0.13 | 0.62 | 17.06 | 2.61 | 4.58 | 4.23 | 1.43 | 1.34 | 0.85 | 45.74 |
| 1854 | 1.76 | 2.85 | 0.77 | 2.68 | 2.05 | 4.91 | 3.70 | 4.86 | 9.27 | 3.12 | 0.23 | 8.45 | 44.65 |
| 1855 | 4.03 | 1.16 | 2.15 | 0.25 | 3.02 | 4.06 | 4.22 | 6.08 | 7.62 | 5.62 | 3.92 | 2.51 | 44.64 |
| 1856 | 5.05 | 3.74 | 1.65 | 0.42 | 2.66 | 2.15 | 7.59 | 3.00 | 6.30 | 6.08 | 1.28 | 0.36 | 40.28 |
| 1857 | 0.65 | 0.86 | 2.73 | 1.69 | 0.71 | 2.08 | 11.00 | 3.84 | 9.11 | 4.29 | 1.10 | 0.81 | 38.87 |
| 1858 | 1.77 | 2.43 | 1.70 | 0.25 | 3.45 | 7.29 | 3.39 | 1.95 | 8.49 | 1.22 | 2.90 | 0.91 | 35.75 |
| 1859 | 2.39 | 0.76 | 0.06 | 0.19 | 2.21 | 3.99 | 3.37 | 4.07 | 2.34 | 6.55 | 4.85 | 0.78 | 31.56 |
| 1860 | 0.54 | 1.12 | 2.55 | 2.53 | 0.28 | 0.44 | 2.09 | 5.35 | 10.48 | 5.27 | 1.93 | 1.97 | 34.55 |
| 1861 | 0.32 | 0.74 | 0.58 | 1.38 | 2.90 | 9.38 | 2.70 | 3.26 | 2.74 | 3.48 | 0.38 | 2.68 | 30.54 |
| 1862 | 2.84 | 1.30 | 0.55 | 2.38 | 2.50 | 4.66 | 3.75 | 6.38 | 3.23 | 4.81 | 0.95 | 0.17 | 33.52 |
| 1863 | 0.90 | 0.67 | 0.02 | 0.70 | 4.06 | 1.47 | 2.30 | 2.17 | 6.05 | 2.85 | 1.50 | 7.92 | 30.61 |
| 1864 | 5.45 | 3.80 | 1.84 | 2.75 | 0.45 | 3.85 | 5.93 | 8.08 | 2.05 | 5.27 | 0.15 | 4.45 | 44.07 |
| 1865 | 2.20 | 6.10 | 3.02 | 0.01 | 0.71 | 2.42 | 4.00 | 9.83 | 7.51 | 4.41 | 0.60 | 0.60 | 41.41 |
| 1866 | |||||||||||||
| 1867 | |||||||||||||
| 1868 | |||||||||||||
| 1869 | |||||||||||||
| 1870 | 3.20 | 2.06 | 3.00 | 0.00 | 0.64 | 15.94 | 7.42 | 13.00 | 9.22 | 8.22 | 3.06 | 3.93 | 69.69 |
| 1871 | 0.39 | 0.39 | 0.08 | 0.02 | 7.22 | 2.62 | 5.76 | 3.43 | 6.30 | 3.25 | 1.90 | 3.32 | 34.68 |
| 1872 | 1.60 | 7.19 | 1.04 | 0.08 | 1.01 | 2.24 | 6.92 | 4.82 | 3.15 | 2.09 | 0.98 | 0.65 | 31.77 |
| 1873 | 3.91 | 0.16 | 0.04 | 2.06 | 1.02 | 3.86 | 4.95 | 3.67 | 6.23 | 1.13 | 2.30 | 3.42 | 32.75 |
| 1874 | 2.90 | 1.73 | 0.11 | 1.55 | 2.78 | 4.54 | 3.03 | 3.78 | 7.42 | 3.43 | 1.21 | 0.27 | 32.75 |
| 1875 | 1.34 | 0.38 | 0.07 | 2.29 | 4.27 | 1.24 | 2.15 | 9.20 | 10.67 | 2.95 | 1.13 | 0.66 | 36.35 |
| 1876 | 0.51 | 1.65 | 0.42 | 0.60 | 3.32 | 5.97 | 5.48 | 4.38 | 3.13 | 9.27 | 2.50 | 0.72 | 37.95 |
| 1877 | 0.91 | 2.61 | 1.17 | 0.46 | 4.53 | 3.92 | 2.14 | 5.51 | 5.04 | 5.17 | 5.00 | 1.69 | 38.15 |
| 1878 | 5.26 | 4.74 | 2.95 | 1.02 | 2.66 | 5.12 | 7.06 | 4.63 | 8.04 | 5.46 | 1.03 | 1.06 | 49.03 |
| 1879 | 4.28 | 3.13 | 0.45 | 0.65 | 5.11 | 7.20 | 1.46 | 5.61 | 9.71 | 14.20 | 2.24 | 4.50 | 58.54 |
| 1880 | 1.20 | 0.33 | 0.93 | 0.33 | 7.84 | 1.81 | 4.61 | 7.30 | 3.59 | 2.81 | 1.95 | 0.71 | 33.41 |
| 1881 | 3.65 | 0.35 | 0.46 | 4.99 | 4.01 | 7.47 | 5.97 | 6.91 | 10.71 | 1.99 | 4.62 | 1.97 | 53.10 |
| 1882 | 1.33 | 0.40 | 0.01 | 3.93 | 7.46 | 3.48 | 4.45 | 4.97 | 6.16 | 4.81 | 2.94 | 1.92 | 41.86 |
| 1883 | 2.82 | 0.80 | 0.87 | 0.54 | 5.58 | 3.29 | 1.51 | 6.08 | 5.17 | 19.77 | 0.84 | 0.97 | 48.24 |
| 1884 | 1.82 | 1.70 | 0.16 | 0.98 | 0.35 | 4.56 | 2.36 | 3.16 | 7.08 | 3.17 | 6.03 | 1.68 | 33.05 |
| 1885 | 4.09 | 4.07 | 1.19 | 0.47 | 2.48 | 3.58 | 3.15 | 2.55 | 5.23 | 5.07 | 0.43 | 1.72 | 34.03 |
| 1886 | 1.45 | 0.13 | 1.30 | 1.99 | 0.11 | 2.51 | 6.72 | 4.54 | 7.10 | 3.32 | 0.13 | 0.83 | 30.13 |
| 1887 | 0.77 | 0.90 | 1.99 | 0.78 | 2.48 | 8.22 | 5.52 | 2.14 | 7.30 | 9.40 | 1.33 | 2.79 | 43.62 |
| 1888 | 0.37 | 0.51 | 0.91 | 1.15 | 2.65 | 0.88 | 9.04 | 2.00 | 5.45 | 3.42 | 4.74 | 4.46 | 35.58 |
| 1889 | 2.42 | 1.05 | 6.89 | 1.15 | 1.08 | 6.48 | 1.51 | 9.40 | 13.87 | 3.16 | 5.38 | 0.28 | 52.67 |
| 1890 | 1.06 | 2.38 | 2.17 | 1.11 | 3.84 | 3.33 | 3.70 | 2.25 | 16.14 | 1.86 | 4.67 | 0.36 | 42.87 |
| 1891 | 2.22 | 0.74 | 1.93 | 0.81 | 0.24 | 2.76 | 0.88 | 10.13 | 10.39 | 6.42 | 2.02 | 1.21 | 39.75 |
| 1892 | 0.58 | 1.71 | 2.15 | 0.72 | 0.84 | 6.10 | 1.69 | 1.59 | 4.05 | 3.67 | 0.95 | 0.86 | 24.91 |
| 1893 | 2.86 | 0.94 | 0.00 | 0.56 | 2.28 | 2.69 | 3.09 | 1.94 | 2.23 | 3.75 | 0.48 | 1.18 | 22.00 |
| 1894 | 1.21 | 0.02 | 1.13 | 0.03 | 4.53 | 3.27 | 2.30 | 4.35 | 17.29 | 6.91 | 1.04 | 0.26 | 42.34 |
| 1895 | 3.26 | 2.62 | 1.34 | 1.87 | 1.41 | 2.92 | 0.62 | 4.92 | 4.41 | 4.77 | 0.24 | 0.81 | 29.19 |
| 1896 | 0.90 | 2.11 | 1.61 | 0.08 | 0.54 | 3.10 | 3.18 | 2.37 | 4.22 | 1.93 | 3.47 | 2.21 | 25.72 |
| 1897 | 3.90 | 1.06 | 0.38 | 4.45 | 4.38 | 2.10 | 3.98 | 6.55 | 9.11 | 7.08 | 1.40 | 2.07 | 46.46 |
| 1898 | 0.34 | 0.22 | 0.70 | 0.61 | 3.26 | 2.44 | 2.28 | 5.73 | 5.33 | 16.99 | 2.24 | 3.25 | 43.39 |
| 1899 | 4.12 | 2.89 | 0.14 | 1.47 | 0.64 | 2.47 | 3.61 | 3.80 | 3.27 | 4.66 | 0.95 | 1.53 | 29.55 |
| 1900 | 2.32 | 1.34 | 2.58 | 1.18 | 9.55 | 8.68 | 3.23 | 3.02 | 10.00 | 5.85 | 0.37 | 0.69 | 48.81 |
| 1901 | 0.33 | 0.47 | 2.68 | 0.46 | 2.74 | 5.65 | 5.58 | 5.75 | 7.15 | 0.79 | 0.25 | 5.17 | 37.02 |
| 1902 | 0.15 | 3.88 | 0.22 | 0.82 | 0.28 | 9.59 | 1.57 | 5.35 | 3.37 | 6.36 | 4.90 | 2.12 | 38.61 |
| 1903 | 3.43 | 1.97 | 3.23 | 0.55 | 0.76 | 4.74 | 2.87 | 4.24 | 3.00 | 4.10 | 0.76 | 0.71 | 30.36 |
| 1904 | 1.42 | 1.08 | 1.94 | 1.51 | 13.01 | 1.70 | 1.40 | 4.24 | 3.55 | 1.57 | 6.22 | 0.34 | 37.98 |
| 1905 | 0.69 | 0.30 | 6.13 | 3.71 | 0.54 | 2.40 | 3.58 | 3.14 | 7.03 | 4.09 | 0.20 | 10.03 | 41.84 |
| 1906 | 3.52 | 3.78 | 3.30 | 0.54 | 5.23 | 6.51 | 1.92 | 3.00 | 5.09 | 4.53 | 10.82 | 0.29 | 48.53 |
| 1907 | 0.11 | 0.20 | 0.00 | 0.46 | 3.52 | 5.96 | 0.68 | 2.16 | 8.17 | 2.10 | 1.49 | 1.80 | 26.65 |
| 1908 | 0.63 | 1.73 | 0.48 | 0.18 | 0.60 | 11.43 | 1.25 | 7.74 | 7.14 | 6.29 | 0.66 | 0.70 | 38.83 |
| 1909 | 1.82 | 0.10 | 0.35 | 3.01 | 6.70 | 9.71 | 1.21 | 8.56 | 6.35 | 16.87 | 0.06 | 1.61 | 56.35 |
| 1910 | 0.62 | 0.83 | 0.35 | 0.03 | 0.86 | 1.06 | 2.57 | 3.21 | 6.42 | 10.95 | 1.35 | 0.18 | 28.43 |
| 1911 | 0.64 | 0.01 | 1.84 | 1.49 | 2.88 | 3.89 | 3.04 | 7.89 | 2.05 | 5.32 | 6.00 | 0.62 | 35.67 |
| 1912 | 4.05 | 3.35 | 1.80 | 0.25 | 6.96 | 9.04 | 2.36 | 1.69 | 4.35 | 6.17 | 1.17 | 2.26 | 43.45 |
| 1913 | 1.62 | 1.57 | 0.34 | 0.56 | 3.46 | 3.13 | 1.00 | 5.18 | 6.22 | 5.23 | 1.36 | 0.29 | 29.96 |
| 1914 | 1.67 | 0.96 | 0.50 | 1.94 | 3.41 | 1.04 | 1.99 | 1.29 | 4.62 | 9.20 | 2.33 | 6.17 | 35.12 |
| 1915 | 7.65 | 2.59 | 2.25 | 1.52 | 7.61 | 3.05 | 3.84 | 0.92 | 7.32 | 4.27 | 1.78 | 2.14 | 44.94 |
| 1916 | 1.37 | 0.42 | 0.63 | 0.24 | 2.69 | 1.86 | 10.89 | 5.04 | 4.38 | 3.38 | 2.01 | 0.10 | 33.01 |
| 1917 | 0.14 | 0.79 | 3.87 | 1.07 | 2.06 | 2.79 | 0.80 | 4.79 | 8.37 | 3.67 | 0.28 | 0.14 | 28.77 |
| 1918 | 1.05 | 0.12 | 2.65 | 2.80 | 5.19 | 0.43 | 1.72 | 1.85 | 3.53 | 7.94 | 0.38 | 2.11 | 29.77 |
| 1919 | 0.74 | 1.44 | 0.25 | 3.11 | 6.81 | 11.04 | 5.25 | 1.46 | 14.26 | 2.66 | 5.23 | 1.10 | 53.35 |
| 1920 | 0.07 | 1.38 | 0.58 | 3.36 | 3.18 | 3.41 | 0.54 | 5.15 | 11.89 | 2.25 | 1.97 | 0.92 | 34.79 |
| 1921 | 1.88 | 1.80 | 0.54 | 0.47 | 1.24 | 4.09 | 5.72 | 4.52 | 5.45 | 7.54 | 2.67 | 0.35 | 36.27 |
| 1922 | 2.60 | 1.44 | 0.08 | 0.08 | 5.01 | 3.78 | 6.90 | 3.51 | 5.56 | 8.31 | 3.36 | 3.02 | 43.65 |
| 1923 | 0.35 | 0.06 | 0.39 | 1.08 | 5.67 | 3.14 | 2.88 | 3.88 | 4.97 | 1.39 | 0.73 | 0.35 | 24.89 |
| 1924 | 3.23 | 0.47 | 0.98 | 0.19 | 2.12 | 3.18 | 2.02 | 3.85 | 5.10 | 12.55 | 0.07 | 0.56 | 34.32 |
| 1925 | 2.22 | 1.89 | 0.94 | 3.61 | 4.76 | 0.53 | 2.42 | 3.57 | 6.22 | 3.14 | 2.40 | 1.72 | 33.42 |
| 1926 | 2.51 | 0.19 | 0.42 | 0.37 | 5.75 | 3.37 | 5.68 | 15.83 | 2.17 | 9.84 | 0.80 | 0.65 | 47.58 |
| 1927 | 0.24 | 0.85 | 0.83 | 0.25 | 0.00 | 0.14 | 2.45 | 1.66 | 5.37 | 9.16 | 0.58 | 0.78 | 22.31 |
| 1928 | 0.20 | 0.07 | 0.34 | 1.74 | 1.50 | 2.61 | 1.73 | 5.25 | 8.13 | 4.55 | 2.34 | 2.26 | 30.72 |
| 1929 | 1.41 | 1.21 | 1.25 | 0.40 | 5.95 | 3.08 | 5.21 | 6.10 | 5.57 | 8.43 | 2.09 | 3.96 | 44.66 |
| 1930 | 4.28 | 2.86 | 3.71 | 4.39 | 3.23 | 12.97 | 2.53 | 4.09 | 2.19 | 7.81 | 0.42 | 4.26 | 52.74 |
| 1931 | 3.98 | 3.89 | 4.44 | 3.73 | 2.41 | 1.96 | 3.23 | 5.56 | 9.10 | 8.02 | 0.68 | 4.04 | 51.04 |
| 1932 | 3.57 | 2.07 | 0.92 | 0.93 | 5.96 | 5.14 | 1.23 | 6.63 | 3.29 | 7.48 | 2.77 | 0.43 | 40.42 |
| 1933 | 0.28 | 0.75 | 2.04 | 0.59 | 1.47 | 10.91 | 3.30 | 4.90 | 3.10 | 23.56 | 0.75 | 0.37 | 52.02 |
| 1934 | 1.10 | 0.95 | 1.45 | 0.93 | 4.70 | 2.84 | 5.03 | 2.24 | 6.72 | 3.01 | 2.12 | 0.41 | 31.50 |
| 1935 | 1.91 | 0.40 | 0.30 | 1.64 | 0.50 | 2.62 | 10.08 | 4.18 | 9.69 | 2.21 | 5.14 | 0.95 | 39.62 |
| 1936 | 2.09 | 5.45 | 4.36 | 1.02 | 3.51 | 10.45 | 4.02 | 7.52 | 5.19 | 3.80 | 1.38 | 1.67 | 50.46 |
| 1937 | 0.84 | 3.32 | 1.18 | 0.13 | 9.63 | 6.04 | 4.11 | 4.34 | 8.01 | 4.59 | 1.28 | 0.82 | 44.29 |
| 1938 | 0.30 | 0.25 | 1.50 | 0.81 | 1.24 | 3.33 | 3.25 | 2.16 | 3.72 | 2.63 | 3.13 | 0.26 | 22.58 |
| 1939 | 1.73 | 2.45 | 0.08 | 7.46 | 2.71 | 1.97 | 3.15 | 3.73 | 3.18 | 11.83 | 0.13 | 3.70 | 42.12 |
| 1940 | 0.62 | 1.56 | 2.72 | 2.48 | 1.93 | 1.10 | 4.59 | 5.75 | 11.88 | 1.86 | 0.76 | 6.25 | 41.50 |
| 1941 | 1.17 | 6.24 | 3.12 | 13.14 | 0.14 | 1.82 | 3.11 | 2.57 | 4.93 | 4.72 | 7.59 | 3.46 | 52.01 |
| 1942 | 2.38 | 1.46 | 2.74 | 4.15 | 1.07 | 9.10 | 0.33 | 1.53 | 2.79 | 0.95 | 1.74 | 0.79 | 29.03 |
| 1943 | 0.71 | 0.49 | 2.68 | 1.03 | 1.71 | 4.64 | 1.72 | 2.56 | 6.35 | 7.95 | 6.20 | 0.49 | 36.53 |
| 1944 | 1.69 | 0.00 | 2.01 | 0.75 | 3.24 | 1.34 | 3.38 | 3.25 | 4.60 | 9.50 | 0.29 | 1.88 | 31.93 |
| 1945 | 1.04 | 0.09 | 0.04 | 1.14 | 0.04 | 3.47 | 6.39 | 9.42 | 8.04 | 6.24 | 3.83 | 1.19 | 40.93 |
| 1946 | 0.88 | 1.29 | 0.84 | 1.37 | 2.05 | 6.70 | 5.82 | 2.94 | 3.44 | 4.02 | 1.02 | 1.31 | 31.68 |
| 1947 | 1.17 | 4.17 | 3.06 | 1.17 | 4.05 | 4.31 | 13.64 | 3.89 | 6.72 | 12.46 | 2.91 | 0.46 | 58.01 |
| 1948 | 1.12 | 0.07 | 1.89 | 12.83 | 0.88 | 0.90 | 5.61 | 2.73 | 13.84 | 5.74 | 0.51 | 3.05 | 49.17 |
| 1949 | 0.41 | 0.12 | 0.83 | 3.19 | 1.22 | 4.16 | 3.38 | 8.22 | 6.11 | 5.56 | 2.79 | 1.09 | 37.08 |
| 1950 | 0.50 | 1.33 | 0.81 | 4.28 | 1.81 | 2.32 | 5.00 | 3.97 | 8.37 | 6.05 | 0.28 | 2.53 | 37.25 |
| 1951 | 0.36 | 0.97 | 0.27 | 2.43 | 0.42 | 3.09 | 6.34 | 4.04 | 1.70 | 4.02 | 2.84 | 1.59 | 28.07 |
| 1952 | 0.53 | 2.62 | 0.69 | 2.06 | 0.34 | 3.38 | 6.93 | 5.20 | 9.67 | 4.78 | 0.73 | 0.94 | 37.87 |
| 1953 | 4.70 | 1.69 | 0.72 | 0.47 | 2.27 | 6.40 | 6.48 | 1.90 | 12.27 | 8.22 | 0.73 | 0.54 | 46.39 |
| 1954 | 0.33 | 4.29 | 2.90 | 5.63 | 2.94 | 5.28 | 1.43 | 5.12 | 5.75 | 1.39 | 20.98 | 0.81 | 56.85 |
| 1955 | 0.95 | 0.05 | 0.65 | 0.35 | 0.49 | 6.12 | 2.71 | 4.78 | 4.05 | 2.23 | 0.63 | 1.09 | 24.11 |
| 1956 | 0.27 | 1.50 | 0.01 | 0.12 | 2.42 | 1.85 | 0.62 | 1.24 | 11.19 | 0.87 | 0.22 | 0.15 | 20.46 |
| 1957 | 0.35 | 4.94 | 2.57 | 1.67 | 5.83 | 0.45 | 3.86 | 4.57 | 3.00 | 7.18 | 1.20 | 1.26 | 36.88 |
| 1958 | 9.26 | 1.94 | 4.41 | 1.37 | 2.65 | 2.76 | 3.81 | 4.20 | 7.55 | 4.05 | 1.19 | 3.90 | 47.09 |
| 1959 | 0.92 | 0.06 | 2.46 | 0.00 | 2.32 | 5.17 | 4.13 | 2.81 | 8.50 | 2.45 | 9.01 | 4.84 | 42.67 |
| 1960 | 0.03 | 1.94 | 1.21 | 1.02 | 12.90 | 2.18 | 3.79 | 9.21 | 9.12 | 3.78 | 0.65 | 0.93 | 46.76 |
| 1961 | 1.25 | 1.42 | 1.28 | 1.75 | 2.37 | 5.60 | 0.54 | 2.97 | 1.71 | 2.74 | 0.13 | 0.78 | 22.54 |
| 1962 | 0.95 | 0.49 | 0.90 | 0.92 | 1.41 | 2.86 | 1.30 | 8.03 | 5.12 | 3.66 | 1.16 | 3.65 | 30.45 |
| 1963 | 0.89 | 1.77 | 0.10 | 0.23 | 3.41 | 4.29 | 1.63 | 7.15 | 18.45 | 1.82 | 6.14 | 1.36 | 47.24 |
| 1964 | 0.06 | 1.38 | 1.67 | 0.85 | 0.96 | 5.42 | 1.63 | 3.42 | 4.10 | 5.19 | 1.09 | 3.59 | 29.36 |
| 1965 | 0.55 | 4.46 | 0.57 | 0.64 | 0.69 | 2.45 | 2.94 | 2.26 | 10.59 | 6.47 | 0.46 | 1.05 | 33.13 |
| 1966 | 4.01 | 3.04 | 1.33 | 2.15 | 2.77 | 13.67 | 5.63 | 3.50 | 8.34 | 7.12 | 0.71 | 1.35 | 53.62 |
| 1967 | 0.76 | 1.79 | 0.59 | 0.02 | 0.67 | 8.57 | 2.53 | 3.98 | 4.96 | 5.63 | 1.38 | 4.00 | 34.88 |
| 1968 | 0.07 | 3.46 | 4.36 | 0.25 | 8.00 | 9.36 | 3.81 | 4.77 | 6.90 | 6.80 | 3.92 | 0.18 | 51.88 |
| 1969 | 3.85 | 1.34 | 0.85 | 3.10 | 3.02 | 9.96 | 4.19 | 2.25 | 10.21 | 21.57 | 1.80 | 0.78 | 62.92 |
| 1970 | 8.21 | 2.10 | 2.20 | 0.11 | 2.63 | 1.96 | 11.69 | 4.03 | 5.35 | 8.03 | 0.15 | 0.36 | 46.82 |
| 1971 | 0.41 | 2.76 | 0.00 | 0.24 | 4.37 | 2.77 | 4.80 | 9.03 | 5.47 | 11.12 | 1.69 | 1.59 | 44.25 |
| 1972 | 2.75 | 2.08 | 0.59 | 0.76 | 2.64 | 14.43 | 4.86 | 3.53 | 8.70 | 0.74 | 2.04 | 3.16 | 46.28 |
| 1973 | 2.48 | 2.43 | 2.20 | 0.16 | 0.82 | 2.87 | 4.08 | 8.55 | 3.30 | 2.43 | 0.18 | 3.24 | 32.74 |
| 1974 | 0.57 | 0.41 | 0.30 | 0.21 | 3.45 | 2.99 | 2.38 | 4.13 | 3.05 | 0.95 | 1.22 | 0.33 | 19.99 |
| 1975 | 0.17 | 1.61 | 0.59 | 0.85 | 1.36 | 5.22 | 4.16 | 4.20 | 7.11 | 3.69 | 0.91 | 1.90 | 31.77 |
| 1976 | 0.97 | 2.18 | 0.05 | 4.79 | 2.65 | 10.23 | 0.81 | 7.10 | 3.38 | 3.22 | 0.50 | 1.91 | 37.79 |
| 1977 | 1.35 | 1.50 | 0.07 | 2.95 | 10.10 | 1.97 | 1.91 | 10.43 | 3.71 | 2.38 | 4.23 | 4.43 | 45.03 |
| 1978 | 2.13 | 1.81 | 2.43 | 1.97 | 9.45 | 5.06 | 1.40 | 2.69 | 3.03 | 4.19 | 1.83 | 0.43 | 36.42 |
| 1979 | 1.65 | 0.95 | 1.03 | 4.56 | 2.20 | 3.00 | 3.50 | 2.51 | 2.84 | 3.11 | 1.61 | 1.21 | 28.17 |
| 1980 | 0.98 | 0.92 | 0.83 | 2.84 | 2.14 | 2.58 | 6.65 | 6.38 | 6.01 | 2.95 | 27.67 | 0.47 | 60.42 |
| 1981 | 0.46 | 2.27 | 0.84 | 0.39 | 0.55 | 0.90 | 1.15 | 8.88 | 6.68 | 1.39 | 3.50 | 0.07 | 27.08 |
| 1982 | 0.38 | 1.68 | 3.44 | 1.74 | 5.78 | 8.95 | 1.94 | 2.61 | 6.36 | 2.27 | 1.20 | 0.30 | 36.65 |
| 1983 | 17.64 | 3.48 | 6.57 | 1.88 | 2.24 | 3.82 | 4.64 | 2.79 | 2.25 | 1.20 | 0.91 | 4.97 | 52.39 |
| 1984 | 0.10 | 4.07 | 2.18 | 4.16 | 5.79 | 7.09 | 3.29 | 2.59 | 8.11 | 1.32 | 1.15 | 0.10 | 39.95 |
| 1985 | 0.32 | 0.29 | 2.15 | 10.60 | 4.39 | 0.57 | 3.64 | 5.92 | 6.42 | 3.04 | 2.62 | 2.28 | 42.24 |
| 1986 | 1.26 | 2.02 | 0.99 | 0.93 | 0.91 | 5.37 | 4.48 | 5.66 | 4.58 | 2.52 | 0.92 | 11.18 | 40.82 |
| 1987 | 0.89 | 0.57 | 9.69 | 0.20 | 2.39 | 4.35 | 3.07 | 3.87 | 6.88 | 8.39 | 5.84 | 2.76 | 48.90 |
| 1988 | 4.78 | 0.46 | 1.68 | 0.64 | 8.12 | 3.60 | 5.78 | 6.29 | 3.48 | 0.76 | 0.78 | 0.19 | 36.56 |
| 1989 | 0.44 | 0.33 | 1.05 | 1.37 | 2.91 | 1.80 | 5.90 | 3.30 | 3.15 | 2.70 | 6.54 | 1.67 | 31.16 |
| 1990 | 0.00 | 1.05 | 0.75 | 1.37 | 5.54 | 0.94 | 4.09 | 8.01 | 5.29 | 5.14 | 2.93 | 1.32 | 36.43 |
| 1991 | 2.24 | 0.27 | 2.90 | 1.45 | 8.07 | 8.42 | 2.21 | 2.23 | 5.39 | 7.12 | 0.13 | 0.72 | 41.15 |
| 1992 | 0.28 | 1.22 | 2.81 | 1.42 | 1.60 | 11.77 | 1.07 | 3.82 | 7.15 | 2.04 | 3.83 | 0.08 | 37.09 |
| 1993 | 7.95 | 0.33 | 1.43 | 1.78 | 4.41 | 1.71 | 0.44 | 3.81 | 5.75 | 6.01 | 0.22 | 2.22 | 36.06 |
| 1994 | 2.32 | 2.28 | 0.34 | 2.44 | 3.13 | 0.33 | 1.91 | 8.97 | 13.00 | 6.29 | 1.30 | 4.52 | 46.83 |
| 1995 | 4.23 | 0.11 | 1.85 | 2.16 | 0.66 | 7.89 | 2.87 | 2.87 | 4.42 | 8.73 | 0.00 | 2.93 | 38.72 |
| 1996 | 0.88 | 0.24 | 1.85 | 2.81 | 2.60 | 3.21 | 3.18 | 6.48 | 6.55 | 11.87 | 0.12 | 1.44 | 41.23 |
| 1997 | 3.75 | 0.63 | 1.87 | 2.62 | 1.00 | 4.84 | 6.90 | 3.63 | 6.50 | 1.15 | 2.15 | 4.41 | 39.45 |
| 1998 | 2.42 | 4.87 | 3.13 | 1.01 | 0.86 | 0.86 | 1.12 | 3.37 | 3.25 | 4.78 | 2.29 | 1.60 | 29.56 |
| 1999 | 2.20 | 1.88 | 0.71 | 1.24 | 2.99 | 5.97 | 1.99 | 9.55 | 7.72 | 12.55 | 0.42 | 0.65 | 47.87 |
| 2000 | 0.50 | 0.66 | 1.48 | 2.22 | 1.27 | 3.47 | 3.87 | 8.84 | 4.02 | 6.04 | 0.57 | 1.96 | 34.90 |
| 2001 | 0.31 | 0.11 | 1.96 | 3.18 | 2.40 | 2.39 | 6.82 | 6.12 | 10.01 | 7.27 | 2.82 | 3.56 | 46.95 |
| 2002 | 0.09 | 2.06 | 1.19 | 0.11 | 5.16 | 4.94 | 4.96 | 6.71 | 8.30 | 2.92 | 1.00 | 4.06 | 41.50 |
| 2003 | 0.40 | 1.29 | 3.10 | 5.20 | 2.68 | 6.42 | 1.57 | 5.07 | 5.69 | 2.05 | 3.50 | 1.30 | 38.00 |
| 2004 | 2.50 | 2.71 | 0.47 | 2.69 | 0.83 | 2.33 | 3.50 | 4.25 | 6.09 | 1.72 | 2.27 | 0.75 | 30.11 |
| 2005 | 1.55 | 0.20 | 3.76 | 2.99 | 1.25 | 6.35 | 6.36 | 13.49 | 7.35 | 4.64 | 5.74 | 0.05 | 53.73 |
| 2006 | 0.23 | 0.71 | 0.05 | 0.01 | 4.30 | 6.04 | 6.46 | 4.04 | 6.86 | 2.92 | 3.21 | 4.82 | 39.65 |
| 2007 | 0.65 | 1.39 | 0.63 | 2.16 | 2.83 | 4.21 | 3.22 | 1.20 | 9.31 | 11.25 | 0.70 | 0.80 | 38.34 |
| 2008 | 0.51 | 2.23 | 1.56 | 1.49 | 0.86 | 0.63 | 1.85 | 6.52 | 8.12 | 12.12 | 2.60 | 0.89 | 39.38 |
| 2009 | 0.81 | 0.65 | 0.72 | 0.70 | 3.87 | 2.10 | 2.16 | 4.91 | 5.31 | 1.11 | 6.63 | 4.49 | 33.46 |
| 2010 | 1.15 | 4.63 | 0.34 | 0.62 | 0.49 | 2.08 | 6.00 | 5.01 | 8.92 | 6.58 | 2.93 | 0.58 | 39.33 |
| 2011 | 5.55 | 2.50 | 4.76 | 1.61 | 0.67 | 5.58 | 7.78 | 3.71 | 3.63 | 4.69 | 1.28 | 3.89 | 45.65 |
| 2012 | 2.68 | 2.96 | 4.37 | 0.62 | 3.03 | 18.61 | 1.84 | 9.65 | X | 2.08 | 0.28 | 3.99 | 50.11M |
| 2013 | 1.06 | 8.87 | 3.86 | 4.88 | 1.91 | 10.11 | 12.33 | 10.18 | X | 0.39 | 3.51 | 5.79 | 62.89M |
| 2014 | 5.85 | 4.67 | 9.68 | X | 4.96 | 4.94 | 5.61 | 4.21 | X | 1.06 | 5.68 | 4.66 | 51.32M |
| 2015 | 6.64 | 5.95 | 2.14 | 7.71 | 2.27 | 7.43 | 6.11 | 7.92 | 4.71 | 2.24 | 2.12 | 3.55 | 58.79 |
| 2016 | 4.42 | 3.37 | 4.93 | 4.92 | 1.25 | 4.82 | 4.78 | 3.52 | X | 4.00 | 0.00 | 3.74 | X |
| 2017 | 8.05 | 1.06 | X | X | X | X | X | X | X | X | X | X | X |
| 2018 | X | X | X | X | X | X | X | X | X | X | X | X | X |
| 2019 | X | X | X | X | X | X | X | X | X | X | X | X | X |
| 2020 | X | X | X | X | X | X | X | X | X | X | X | X | X |
| 2021 | X | X | X | X | X | X | X | X | X | X | X | X | X |
M = Monthly means or totals based on incomplete time series. 1 to 9 days are missing
X = Data not available
Last Updated on 01/06/21
By EP
