YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.23 | 60.92 | a | 45.50 | a | 37.66 | b | 52.83 | h | |
1901 | 35.88 | b | 31.08 | c | 42.29 | 51.77 | 61.10 | 73.50 | 80.48 | 77.27 | 67.13 | 57.08 | 45.68 | 33.71 | 54.75 | |||||||||||
1902 | 33.40 | a | 36.59 | a | 42.50 | 53.16 | a | 66.02 | 72.16 | b | 76.12 | a | 79.76 | 65.96 | b | 56.85 | 43.98 | 31.82 | a | 54.86 | ||||||
1903 | 36.06 | 24.86 | 40.63 | 51.52 | 58.47 | b | 65.95 | 81.53 | 77.94 | 67.77 | 58.13 | a | 43.38 | 36.77 | a | 53.58 | ||||||||||
1904 | 31.07 | c | 38.93 | a | 45.03 | 49.91 | b | 61.48 | 69.17 | a | 74.61 | 73.15 | 67.48 | a | 55.91 | d | 43.70 | 33.89 | c | 53.70 | ||||||
1905 | 26.88 | a | 23.44 | a | 47.88 | b | 49.66 | a | 59.25 | a | 74.45 | 77.63 | 77.98 | b | 68.00 | b | 51.50 | b | 44.90 | ----- | z | 54.69 | a | |||
1906 | 33.76 | 37.38 | 34.38 | b | 48.05 | b | 61.08 | 68.54 | e | 70.13 | 72.24 | 65.15 | 53.32 | q | 37.82 | 39.85 | e | 51.67 | a | |||||||
1907 | 34.38 | a | 37.89 | f | 49.46 | g | 50.30 | c | 55.97 | 67.16 | a | 75.91 | i | 74.40 | f | 70.12 | d | 54.00 | k | 40.98 | d | 35.84 | i | 53.15 | f | |
1908 | 35.25 | q | 37.23 | a | 46.63 | 53.20 | 59.12 | a | 70.98 | 73.58 | a | 76.98 | a | 70.98 | 57.43 | c | 44.88 | 34.13 | 56.83 | a | ||||||
1909 | 35.22 | a | 35.96 | 40.61 | c | 50.10 | 59.12 | b | 72.15 | 78.45 | 79.15 | d | 66.52 | 54.15 | 46.38 | 24.25 | a | 53.50 | ||||||||
1910 | 33.53 | a | 32.28 | a | 52.61 | 53.31 | a | 58.73 | a | 73.41 | a | 78.78 | d | 76.27 | 67.05 | 57.81 | 45.91 | a | 34.77 | 55.37 | ||||||
1911 | 39.77 | c | 37.31 | g | 45.85 | d | 52.63 | 64.29 | b | 75.13 | 76.71 | 71.90 | k | 71.98 | d | 54.32 | a | 39.33 | a | 26.02 | a | 54.60 | b | |||
1912 | 21.37 | 33.36 | a | 31.25 | e | 52.87 | 66.85 | e | 67.00 | c | 75.44 | 73.32 | ----- | z | 57.28 | a | 45.38 | a | 32.97 | a | 50.64 | a | ||||
1913 | 30.25 | c | 24.19 | a | 40.32 | c | 52.63 | 66.18 | a | 69.17 | 77.77 | 77.85 | 61.90 | 53.17 | a | 44.88 | a | 24.47 | 51.90 | |||||||
1914 | 35.47 | a | 33.04 | 41.55 | a | 50.95 | a | 60.03 | 71.95 | a | ----- | z | 74.00 | 69.93 | 54.65 | a | 45.92 | 26.02 | c | 51.23 | a | |||||
1915 | 26.92 | 34.07 | a | 33.09 | c | 53.69 | a | 54.93 | c | 64.80 | 70.29 | 68.43 | a | 66.32 | 55.53 | 45.89 | b | 35.34 | 50.78 | |||||||
1916 | 23.39 | 37.50 | 47.55 | 48.80 | 60.71 | 70.27 | 78.10 | 74.73 | a | 64.64 | a | 54.13 | 38.98 | 25.47 | 52.02 | |||||||||||
1917 | 26.52 | e | 38.21 | b | 39.61 | c | 43.66 | b | 51.67 | d | 71.37 | c | 78.82 | a | 72.32 | 66.53 | 51.00 | 41.79 | b | 32.13 | 51.14 | |||||
1918 | 24.04 | e | 34.27 | b | 43.22 | b | 43.40 | d | 60.75 | e | 78.16 | a | 76.18 | 79.05 | b | 66.12 | b | 54.74 | 38.80 | b | 32.27 | a | 52.58 | |||
1919 | 24.02 | a | 27.78 | a | 47.00 | a | 51.26 | a | 59.70 | a | 67.28 | a | 74.58 | 74.63 | a | 67.62 | 50.43 | a | 37.90 | a | 26.88 | a | 50.76 | |||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | 44.35 | 48.47 | 60.13 | 70.52 | 75.77 | 75.58 | 68.90 | 59.13 | a | 45.47 | 35.15 | 58.35 | b | |||||||||
1922 | 26.90 | 34.09 | a | 41.93 | a | 50.18 | 60.24 | 71.63 | 75.92 | 77.26 | 71.52 | 55.84 | 41.83 | 32.98 | a | 53.36 | ||||||||||
1923 | 40.90 | a | 28.00 | b | 38.91 | b | 53.24 | a | 59.77 | a | 74.45 | 84.80 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.30 | e | |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.39 | c | 65.40 | a | 59.39 | c | 45.75 | 21.69 | 54.13 | g | ||
1925 | 30.88 | a | 41.74 | a | 51.02 | b | 57.45 | b | 67.16 | ----- | z | 79.36 | b | 74.98 | 68.98 | a | 46.13 | a | 37.46 | b | ----- | z | 55.52 | b | ||
1926 | ----- | z | 44.20 | ----- | z | ----- | z | ----- | z | 71.98 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.09 | j | ||
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.76 | ----- | z | ----- | z | 58.76 | k | |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.85 | c | 75.71 | c | 75.67 | g | 67.28 | a | 54.39 | 41.68 | b | 34.05 | a | 56.49 | f | |
1929 | 28.16 | c | 27.09 | 42.84 | 52.90 | 59.03 | 71.57 | 77.90 | 76.07 | a | 64.22 | 51.62 | c | 36.34 | a | 37.62 | b | 52.11 | ||||||||
1930 | 16.53 | 44.48 | 40.91 | d | 56.07 | 59.95 | a | 71.48 | 76.57 | b | 76.21 | 69.65 | j | ----- | z | 43.82 | h | 23.18 | 51.71 | c | ||||||
1931 | 34.20 | a | 41.50 | ----- | z | 48.50 | c | 56.47 | a | 74.09 | a | 78.31 | 74.48 | 74.13 | 59.90 | a | 40.90 | 36.42 | a | 56.26 | a | |||||
1932 | 27.56 | ----- | z | 34.08 | 52.29 | a | 64.27 | 67.20 | 80.02 | 76.60 | 64.85 | 52.40 | b | 41.47 | 24.95 | 53.24 | a | |||||||||
1933 | 43.63 | a | ----- | z | 45.85 | a | 50.30 | 59.98 | 76.17 | 79.40 | 73.83 | a | 72.87 | 57.02 | 46.29 | a | 42.45 | 58.89 | a | |||||||
1934 | 39.23 | 38.00 | 43.56 | 54.13 | 67.90 | 76.40 | 83.75 | c | 78.74 | 65.91 | a | 60.02 | 46.00 | 36.98 | a | 57.55 | ||||||||||
1935 | 39.21 | 39.09 | 47.66 | 53.68 | 57.07 | a | 74.42 | 82.07 | a | 77.21 | 67.97 | 57.06 | 40.98 | 34.77 | 55.93 | |||||||||||
1936 | 31.70 | a | 27.00 | 47.55 | 52.27 | 62.90 | 68.00 | x | 80.20 | h | 77.13 | h | 66.93 | 52.10 | 42.70 | 37.03 | 46.69 | c | ||||||||
1937 | 23.63 | 34.66 | 39.15 | 52.02 | 64.16 | 70.72 | 78.90 | 79.65 | 68.88 | 55.34 | 41.10 | a | 31.57 | a | 53.31 | |||||||||||
1938 | 33.89 | 36.18 | 46.17 | j | 51.63 | 61.29 | 72.65 | 77.24 | 77.79 | 68.72 | 59.21 | 38.57 | 35.10 | 55.66 | a | |||||||||||
1939 | 35.37 | 29.50 | 42.18 | 53.05 | 60.62 | a | 69.76 | e | 78.02 | c | 74.60 | 71.00 | 56.97 | 41.37 | 38.08 | 54.21 | ||||||||||
1940 | 19.74 | 36.86 | 43.42 | 50.60 | 62.00 | 70.35 | 79.13 | 73.24 | 69.22 | 59.65 | 39.50 | d | 34.52 | h | 54.88 | a | ||||||||||
1941 | 34.77 | 38.57 | a | 41.44 | 52.10 | a | 64.55 | 69.65 | 78.10 | j | 74.00 | m | 65.80 | h | 55.97 | 46.57 | 37.03 | 48.96 | c | |||||||
1942 | 32.12 | a | 31.70 | 41.50 | 54.87 | 63.73 | 70.91 | a | 77.87 | a | 76.57 | a | 67.83 | a | 53.69 | 42.29 | i | 32.48 | 54.84 | a | ||||||
1943 | 32.68 | 39.43 | 40.28 | a | 57.00 | 57.69 | 73.15 | 77.47 | 78.45 | 66.00 | 54.10 | 41.57 | 31.73 | 54.13 | ||||||||||||
1944 | 31.66 | 36.14 | 39.92 | 45.95 | 61.58 | 70.67 | 73.63 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.36 | e | ||||||
1945 | ----- | z | ----- | z | ----- | z | 52.30 | b | ----- | z | 72.87 | d | ----- | z | ----- | z | 57.40 | d | 58.12 | a | ----- | z | ----- | z | 60.17 | h |
1946 | 27.71 | b | 33.96 | 47.56 | d | 58.70 | 56.65 | a | ----- | z | ----- | z | 69.56 | 65.17 | 56.71 | 32.57 | a | 34.82 | a | 48.34 | b | |||||
1947 | 32.23 | 32.62 | 40.73 | a | 52.74 | a | 60.34 | b | ----- | z | ----- | z | ----- | z | 68.83 | a | ----- | z | ----- | z | ----- | z | 47.92 | f | ||
1948 | ----- | z | 27.07 | 32.77 | a | 57.23 | 62.00 | 70.47 | 75.85 | 73.77 | a | 69.10 | 55.24 | 38.52 | 35.32 | 54.30 | a | |||||||||
1949 | 23.43 | b | ----- | z | 43.10 | ----- | z | 62.92 | m | 69.25 | 74.61 | 72.40 | 65.36 | a | 53.32 | 48.48 | 33.71 | 53.74 | c | |||||||
1950 | 31.90 | 39.21 | 41.83 | j | 50.93 | 60.45 | 71.95 | 72.52 | 70.50 | 63.97 | 61.40 | 40.97 | 36.13 | 54.54 | a | |||||||||||
1951 | 29.42 | 37.12 | 40.11 | 48.80 | 60.58 | 64.45 | 76.02 | 75.56 | 65.23 | 53.34 | 38.47 | a | 31.32 | a | 51.70 | |||||||||||
1952 | 36.19 | 36.36 | 37.85 | 50.77 | 61.37 | 79.35 | 78.05 | 77.71 | 67.72 | 54.35 | 45.36 | p | 33.15 | a | 55.72 | a | ||||||||||
1953 | 41.21 | 36.41 | 46.31 | 49.00 | 58.85 | 77.18 | 77.87 | 74.76 | 69.82 | 56.26 | 43.35 | 31.45 | 55.21 | |||||||||||||
1954 | 33.77 | a | 44.61 | 39.42 | 57.00 | 59.46 | c | 74.37 | 79.45 | a | 74.89 | 71.47 | 54.87 | 44.60 | 37.55 | a | 55.95 | |||||||||
1955 | 31.87 | 31.29 | 41.27 | 53.52 | 61.19 | e | 67.12 | 77.94 | 75.81 | 67.52 | 57.48 | 40.42 | 35.26 | 53.39 | ||||||||||||
1956 | 33.56 | 30.66 | a | 52.12 | w | 49.35 | 65.55 | 75.47 | a | 74.34 | 72.55 | 66.92 | 57.74 | 40.60 | a | 38.05 | 54.98 | a | ||||||||
1957 | 29.98 | a | 41.57 | 41.81 | 48.25 | 58.81 | 69.05 | 78.58 | a | 75.88 | a | 65.03 | 55.08 | 39.68 | 41.06 | 53.73 | ||||||||||
1958 | 34.03 | 36.35 | a | 32.42 | 49.38 | a | 64.26 | 72.17 | 74.34 | 76.18 | 68.72 | 55.76 | 42.91 | a | 35.19 | 53.48 | ||||||||||
1959 | 29.19 | 33.18 | 41.35 | 49.85 | 61.12 | a | 72.31 | a | 74.63 | a | 76.56 | 64.70 | 51.32 | 41.23 | 36.90 | a | 52.70 | |||||||||
1960 | 29.16 | 25.86 | a | 38.27 | 55.67 | 60.72 | a | 71.72 | 74.18 | 75.74 | 66.98 | 55.56 | 43.45 | b | 33.15 | a | 52.54 | |||||||||
1961 | 34.02 | 36.86 | 42.28 | a | 50.17 | 62.69 | 71.50 | 75.03 | 73.92 | a | 63.17 | a | 54.63 | 37.07 | a | 30.02 | 52.61 | |||||||||
1962 | 25.97 | 37.62 | 39.56 | 52.60 | 65.61 | 69.35 | 74.50 | 76.55 | 66.08 | 58.11 | 43.60 | 36.94 | 53.88 | |||||||||||||
1963 | 23.70 | a | 39.64 | 44.76 | 56.58 | 65.37 | 72.97 | 79.56 | 76.82 | 70.80 | 62.47 | 45.65 | 26.35 | 55.39 | ||||||||||||
1964 | 35.13 | 28.77 | a | 39.47 | a | 49.53 | 62.18 | 70.50 | 80.97 | 73.74 | ----- | z | 55.53 | 43.55 | 25.65 | n | 53.94 | b | ||||||||
1965 | 38.91 | b | 34.34 | 32.21 | 55.58 | 61.02 | 68.10 | 75.48 | 74.40 | 63.87 | 58.81 | 49.80 | 39.06 | 54.30 | ||||||||||||
1966 | 25.10 | a | 31.69 | a | 45.84 | 48.34 | a | 66.23 | 73.08 | 80.02 | h | 72.77 | e | 62.98 | ----- | z | 35.38 | 32.37 | a | 49.38 | b | |||||
1967 | 39.89 | h | 37.36 | 50.52 | b | 57.53 | 59.71 | b | 70.72 | g | 77.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.45 | g | |||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | 54.50 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | 65.31 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.17 | o | 55.15 | a | 42.36 | a | 35.29 | 44.27 | i | |
1972 | 33.10 | a | 37.65 | e | 48.32 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.37 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.28 | 34.71 | 41.90 | 51.83 | 61.17 | 71.35 | 77.13 | 75.46 | 67.24 | 55.85 | 42.24 | 33.30 | 53.56 | |||||||||||||
S.D. | 5.64 | 5.12 | 4.77 | 3.19 | 3.17 | 3.18 | 2.87 | 2.49 | 2.87 | 2.98 | 3.45 | 4.68 | 1.60 | |||||||||||||
SKEW | -0.26 | -0.31 | -0.23 | -0.12 | -0.09 | 0.08 | 0.09 | -0.54 | -0.33 | -0.40 | -0.33 | -0.71 | 0.27 | |||||||||||||
MAX | 43.63 | 44.61 | 52.61 | 58.70 | 67.90 | 79.35 | 84.80 | 79.76 | 74.13 | 62.47 | 49.80 | 42.45 | 57.55 | |||||||||||||
MIN | 16.53 | 23.44 | 31.25 | 43.40 | 51.67 | 64.45 | 70.13 | 68.43 | 57.40 | 46.13 | 32.57 | 21.69 | 50.76 | |||||||||||||
YRS | 58 | 57 | 56 | 61 | 60 | 59 | 55 | 54 | 58 | 59 | 58 | 56 | 31 |