YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1893 | 29.14 | c | 35.96 | a | 38.35 | 41.53 | 45.32 | 47.50 | 48.77 | 48.87 | 48.07 | 40.68 | 38.38 | a | 39.43 | a | 41.83 | |||||||||
1894 | 36.73 | a | 33.29 | 36.77 | a | 41.43 | 43.97 | 49.73 | 50.97 | 51.58 | 48.72 | a | ----- | z | 40.07 | 33.52 | b | 42.43 | a | |||||||
1895 | 32.79 | b | 36.04 | 34.43 | a | 40.43 | 45.10 | 48.53 | 50.87 | 49.03 | 45.13 | 39.58 | 36.10 | 36.87 | a | 41.24 | ||||||||||
1896 | 37.28 | b | 37.57 | a | 37.16 | 39.27 | 44.52 | 47.43 | 52.00 | 53.03 | ----- | z | ----- | z | ----- | z | ----- | z | 43.53 | d | ||||||
1897 | 35.45 | b | 37.32 | 35.19 | 42.00 | 48.06 | 50.72 | a | 52.48 | 55.52 | 48.43 | 42.39 | 38.46 | b | 39.16 | 43.77 | ||||||||||
1898 | 35.32 | 39.96 | 35.06 | 41.47 | 44.35 | 49.37 | 53.26 | 53.00 | 51.41 | a | 42.06 | 37.33 | 32.81 | 42.95 | ||||||||||||
1899 | 38.35 | 33.27 | b | 34.74 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.46 | i | ||
1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | ----- | z | ----- | z | ----- | z | 46.13 | 47.83 | 54.48 | 50.45 | 47.25 | b | 43.00 | 38.00 | d | 35.45 | 45.32 | d | ||||||
1907 | 29.59 | b | 37.19 | a | 35.87 | 40.30 | 44.00 | a | 48.95 | k | 52.06 | 50.04 | e | 47.00 | 46.18 | i | 38.07 | 37.61 | 41.17 | b | ||||||
1908 | 35.87 | a | 35.43 | a | 36.10 | 41.21 | a | 43.29 | 49.50 | 53.74 | 49.84 | 43.97 | 39.63 | a | 40.43 | 33.47 | a | 41.87 | ||||||||
1909 | 28.45 | 38.00 | 36.19 | 37.14 | h | 40.65 | 47.03 | 49.61 | 46.71 | 47.00 | 43.48 | 40.37 | 28.87 | 40.58 | a | |||||||||||
1910 | 31.55 | 32.43 | 39.77 | 40.03 | 46.19 | 46.67 | 50.35 | 46.52 | 45.20 | 44.16 | 38.60 | 36.48 | 41.50 | |||||||||||||
1911 | 32.00 | 31.04 | 35.00 | 35.23 | ----- | z | ----- | z | 50.48 | 48.77 | 45.93 | 39.19 | 36.60 | 34.10 | 38.84 | b | ||||||||||
1912 | 35.04 | f | 35.66 | 33.74 | 37.57 | 44.61 | ----- | z | ----- | z | 51.97 | 45.93 | 36.94 | 38.27 | 34.10 | 39.86 | c | |||||||||
1913 | 31.79 | b | 29.39 | 35.23 | 38.97 | 44.00 | 49.43 | 52.10 | 52.68 | 45.23 | 40.35 | 37.83 | 33.61 | 40.89 | ||||||||||||
1914 | 37.55 | 33.61 | 39.81 | 41.37 | 44.81 | 46.93 | 50.90 | 49.68 | 47.20 | 45.13 | 37.36 | b | 27.77 | 41.84 | ||||||||||||
1915 | 30.74 | 35.04 | 38.71 | 41.37 | 44.39 | 47.93 | 53.71 | 51.97 | 46.40 | 40.61 | 38.13 | 33.84 | 41.90 | |||||||||||||
1916 | 25.29 | 35.93 | 37.06 | 39.00 | 41.90 | 47.93 | 49.97 | 50.90 | 46.77 | 34.84 | 31.08 | f | 32.10 | 40.15 | a | |||||||||||
1917 | 30.29 | 32.29 | 31.74 | 38.03 | 43.16 | 45.80 | 51.39 | 49.84 | 49.17 | 38.48 | 37.07 | 40.03 | a | 40.61 | ||||||||||||
1918 | 38.03 | a | 32.61 | 35.74 | 35.77 | 40.61 | 48.77 | 48.45 | 49.87 | 48.43 | 43.23 | a | 35.40 | 32.52 | 40.79 | |||||||||||
1919 | 31.55 | 34.61 | 35.77 | 38.30 | 41.13 | 43.90 | 49.26 | 48.90 | 45.57 | 37.94 | 37.21 | a | 29.29 | c | 39.45 | |||||||||||
1920 | 33.48 | 31.83 | 35.71 | 37.77 | 39.74 | 48.20 | 51.81 | 52.81 | 48.87 | 43.55 | 36.50 | 37.13 | 41.45 | |||||||||||||
1921 | 34.13 | a | 38.11 | a | 38.10 | 38.83 | 44.13 | 51.40 | 49.55 | 51.23 | 45.50 | 43.61 | 41.10 | 32.61 | 42.36 | |||||||||||
1922 | 30.23 | 32.22 | a | 35.65 | 38.00 | 44.19 | 49.87 | 51.65 | 51.97 | 48.73 | 45.19 | 34.23 | 34.42 | 41.36 | ||||||||||||
1923 | 36.94 | 30.96 | 35.00 | 40.73 | 44.42 | 49.43 | 54.97 | 54.00 | 48.50 | 42.19 | 37.47 | 33.87 | a | 42.37 | ||||||||||||
1924 | 30.00 | 38.48 | 35.71 | 39.93 | 45.03 | 48.93 | 50.58 | 52.13 | 46.13 | 43.86 | j | 37.77 | 25.31 | b | 40.91 | a | ||||||||||
1925 | 39.19 | 39.75 | 37.58 | 43.00 | 47.81 | 50.20 | 54.39 | 51.94 | 49.60 | 41.16 | 39.55 | a | 37.37 | a | 44.29 | |||||||||||
1926 | 34.74 | 40.68 | 39.77 | 45.33 | 47.68 | 51.67 | 53.58 | 54.10 | 47.00 | 46.32 | 42.77 | 36.75 | k | 45.79 | a | |||||||||||
1927 | 34.79 | b | 37.07 | 39.39 | 40.10 | 44.79 | b | 53.05 | h | 52.93 | a | 53.32 | 49.70 | 44.74 | 42.71 | b | 32.63 | a | 42.93 | a | ||||||
1928 | 35.19 | 34.48 | 42.00 | a | 42.23 | 46.39 | 50.97 | 53.90 | 51.74 | 47.83 | 44.32 | 39.47 | 32.97 | a | 43.46 | |||||||||||
1929 | 29.21 | b | 28.89 | 38.23 | 38.43 | 45.06 | 49.43 | 52.06 | 51.81 | 47.47 | 43.48 | 32.90 | 37.83 | a | 41.23 | |||||||||||
1930 | 23.00 | 39.00 | a | 38.32 | 43.20 | 43.32 | 47.77 | 51.29 | 53.43 | a | 50.10 | 40.48 | 36.77 | 33.45 | 41.68 | |||||||||||
1931 | 36.90 | 34.61 | 39.94 | 42.47 | 47.19 | 50.33 | 53.61 | 52.10 | 49.60 | 43.58 | 35.87 | 34.58 | 43.40 | |||||||||||||
1932 | 34.10 | a | 34.93 | 40.97 | 42.00 | 45.65 | 51.03 | 50.81 | 53.35 | 46.97 | 45.16 | 41.50 | 31.03 | a | 43.12 | |||||||||||
1933 | 34.45 | 32.58 | b | 38.16 | 39.10 | 43.84 | 49.30 | 51.77 | 53.68 | 47.80 | 44.61 | 38.13 | 41.42 | 42.90 | ||||||||||||
1934 | 40.16 | 39.37 | a | 43.10 | 44.57 | 47.71 | 49.73 | 52.13 | 53.23 | 47.43 | 45.63 | a | 43.80 | 37.06 | 45.33 | |||||||||||
1935 | 32.39 | 35.96 | 35.29 | 40.77 | 42.39 | 50.73 | 51.90 | 51.81 | 49.63 | 41.74 | 33.72 | a | 32.77 | 41.59 | ||||||||||||
1936 | 36.45 | 30.03 | 36.26 | 43.10 | 48.00 | 52.47 | 53.81 | 53.29 | 48.40 | 42.39 | 30.80 | 36.97 | b | 42.66 | ||||||||||||
1937 | 23.93 | a | 34.39 | 39.45 | 39.73 | 45.35 | 52.07 | 54.32 | 51.81 | 49.90 | 46.32 | 43.30 | 36.87 | 43.12 | ||||||||||||
1938 | 34.23 | a | 34.54 | 37.74 | 41.70 | 45.32 | 50.60 | 54.81 | 50.81 | 52.70 | 44.19 | 35.47 | 35.20 | a | 43.11 | |||||||||||
1939 | 36.55 | 34.39 | 38.29 | 42.33 | 45.35 | 49.03 | 53.84 | 53.68 | 50.23 | 45.42 | 40.70 | 40.55 | 44.20 | |||||||||||||
1940 | 33.73 | a | 39.38 | 41.16 | 43.43 | 47.45 | 51.80 | 54.35 | 54.16 | 52.97 | 47.42 | 36.79 | a | 36.81 | 44.96 | |||||||||||
1941 | 37.06 | 36.50 | 39.84 | 41.93 | 46.52 | 51.17 | 56.71 | 54.26 | 49.13 | 43.81 | 40.03 | 37.83 | a | 44.57 | ||||||||||||
1942 | 29.55 | 35.25 | 35.42 | 41.07 | 45.68 | 48.93 | 56.00 | 54.42 | 47.87 | 41.90 | 38.87 | 38.87 | 42.82 | |||||||||||||
1943 | 28.29 | 34.04 | 35.81 | 42.17 | 44.13 | 49.23 | 52.26 | 51.61 | 48.63 | 43.23 | 35.60 | 31.00 | 41.33 | |||||||||||||
1944 | 30.87 | a | 33.52 | 33.35 | 39.53 | 42.97 | 47.63 | 50.06 | 49.19 | 45.60 | 42.40 | a | 36.20 | 30.84 | 40.18 | |||||||||||
1945 | 35.45 | 35.86 | 36.71 | 39.90 | 47.42 | 47.77 | 51.06 | 48.26 | 42.37 | 36.74 | 41.10 | 36.13 | a | 41.56 | ||||||||||||
1946 | 34.87 | 35.75 | 37.84 | 41.63 | 47.16 | 50.83 | 54.10 | 52.16 | 47.33 | 39.70 | a | 34.97 | 36.19 | 42.71 | ||||||||||||
1947 | 30.83 | a | 35.36 | 38.77 | 42.93 | 47.35 | 50.37 | 52.52 | 51.52 | 48.97 | a | 46.74 | 38.63 | 34.48 | 43.21 | |||||||||||
1948 | 30.48 | 32.34 | 35.39 | 39.40 | 45.45 | 52.41 | a | ----- | z | 51.74 | 46.43 | 40.45 | 35.60 | 30.10 | 39.98 | a | ||||||||||
1949 | 20.90 | 33.07 | 37.94 | 41.45 | a | 46.16 | 47.37 | 50.68 | 51.16 | 48.67 | 36.65 | 39.27 | 32.97 | 40.52 | ||||||||||||
1950 | 24.52 | 31.57 | 37.10 | 40.17 | 43.10 | 51.57 | 53.71 | 53.48 | 48.23 | 45.58 | 40.50 | 42.48 | 42.67 | |||||||||||||
1951 | 34.74 | 35.86 | 33.74 | 40.47 | 44.87 | 49.43 | 51.90 | b | 49.90 | 46.37 | 43.45 | 37.67 | 32.67 | a | 41.76 | |||||||||||
1952 | 32.19 | 33.31 | 35.39 | 38.63 | 43.06 | 46.37 | 50.45 | 49.68 | 46.83 | 43.26 | 30.97 | 34.84 | 40.42 | |||||||||||||
1953 | 41.39 | 35.43 | 36.00 | 40.50 | 44.35 | 48.77 | 52.10 | 53.29 | 48.97 | 41.87 | 40.13 | 36.19 | 43.25 | |||||||||||||
1954 | 33.74 | 33.61 | 31.35 | 38.80 | 44.90 | 48.40 | 51.35 | 52.32 | 48.17 | 39.65 | 42.40 | 33.68 | 41.53 | |||||||||||||
1955 | 33.13 | 32.50 | 33.45 | 37.30 | 42.13 | 49.30 | 51.03 | 50.65 | 47.60 | 44.42 | 36.93 | 36.35 | 41.23 | |||||||||||||
1956 | 36.52 | 31.45 | 35.80 | a | 40.27 | 47.65 | 48.33 | 53.42 | 53.13 | 48.70 | 42.06 | 34.13 | 35.48 | 42.24 | ||||||||||||
1957 | 26.10 | 35.11 | 39.71 | 41.57 | 48.74 | 51.43 | 50.48 | 49.00 | 47.60 | 40.71 | 29.33 | 35.90 | 41.31 | |||||||||||||
1958 | 36.90 | 42.32 | 35.74 | 41.77 | 48.87 | 55.33 | 56.84 | 55.81 | 49.67 | 42.97 | 39.90 | 40.16 | 45.52 | |||||||||||||
1959 | 38.06 | 34.86 | 37.29 | 41.17 | 44.61 | 51.33 | 54.06 | 52.42 | 49.10 | 44.13 | 34.67 | 34.26 | 43.00 | |||||||||||||
1960 | 30.84 | 35.14 | 36.83 | a | 40.53 | 44.39 | 49.00 | 49.87 | a | 48.19 | 46.80 | 42.06 | 37.93 | 32.29 | 41.16 | |||||||||||
1961 | 36.23 | a | 40.11 | a | 39.03 | 40.43 | 45.61 | 50.70 | 52.84 | 53.52 | 44.67 | 40.37 | a | 32.97 | 36.06 | 42.71 | ||||||||||
1962 | 30.19 | 33.79 | 35.65 | 40.83 | 41.68 | 45.10 | 47.45 | 48.42 | 46.97 | 42.26 | 39.10 | 34.97 | 40.53 | |||||||||||||
1963 | 25.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.45 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.86 | 35.00 | 36.93 | 40.53 | 44.90 | 49.34 | 52.16 | 51.58 | 47.78 | 42.33 | 37.74 | 34.85 | 42.26 | |||||||||||||
S.D. | 4.36 | 2.85 | 2.35 | 1.94 | 2.06 | 1.99 | 1.98 | 2.06 | 1.92 | 2.70 | 3.02 | 3.30 | 1.35 | |||||||||||||
SKEW | -0.60 | 0.28 | 0.21 | -0.27 | -0.24 | -0.01 | 0.13 | -0.37 | 0.07 | -0.57 | -0.42 | -0.19 | 0.44 | |||||||||||||
MAX | 41.39 | 42.32 | 43.10 | 45.33 | 48.87 | 55.33 | 56.84 | 55.81 | 52.97 | 47.42 | 43.80 | 42.48 | 45.52 | |||||||||||||
MIN | 20.90 | 28.89 | 31.35 | 35.23 | 39.74 | 43.90 | 47.45 | 46.52 | 42.37 | 34.84 | 29.33 | 25.31 | 39.45 | |||||||||||||
YRS | 63 | 63 | 63 | 61 | 62 | 59 | 61 | 63 | 62 | 59 | 61 | 61 | 51 |