YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.25 | c | 90.70 | 77.84 | 64.53 | 63.57 | a | 78.38 | g | |||
1923 | 64.61 | 55.18 | 65.52 | 73.83 | 85.13 | 93.10 | 95.94 | 94.42 | 86.53 | 70.29 | 60.50 | 55.35 | 75.03 | |||||||||||||
1924 | 54.77 | 59.86 | 62.68 | 76.82 | h | 82.97 | 98.60 | 95.68 | 97.06 | 89.07 | a | 80.32 | 71.43 | 56.81 | 77.20 | a | ||||||||||
1925 | 56.50 | e | 73.71 | 79.13 | 83.87 | 85.40 | a | 96.97 | 99.42 | 90.37 | a | 85.57 | 75.07 | b | 68.17 | 57.30 | a | 79.29 | ||||||||
1926 | 58.54 | c | 70.28 | j | 64.90 | 72.55 | a | 86.10 | 91.97 | 89.19 | 87.07 | a | 86.10 | 76.72 | b | ----- | z | ----- | z | 79.24 | c | |||||
1927 | ----- | z | ----- | z | 66.64 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | 87.63 | l | 94.00 | 94.68 | 86.11 | c | 83.43 | 81.35 | 63.73 | d | 61.86 | c | 80.74 | e | ||||
1929 | 60.50 | a | 60.00 | a | 69.57 | a | 79.31 | a | 83.14 | c | 93.20 | 93.33 | a | ----- | z | 89.48 | a | ----- | z | ----- | z | ----- | z | 78.57 | d | |
1930 | ----- | z | ----- | z | 66.42 | l | 82.20 | 83.32 | 89.34 | a | 94.26 | 93.86 | b | 92.17 | 73.35 | 61.63 | 54.39 | 80.50 | c | |||||||
1931 | 55.77 | 59.89 | 66.10 | 72.57 | 80.74 | 93.47 | 94.03 | 92.42 | 92.60 | 80.90 | 67.50 | 48.71 | 75.39 | |||||||||||||
1932 | 50.77 | 59.59 | 63.61 | 79.63 | 80.81 | 90.30 | 93.26 | 91.81 | 78.63 | 74.19 | 66.43 | 50.23 | 73.27 | |||||||||||||
1933 | 59.97 | 59.32 | 71.65 | 77.33 | 85.61 | 93.63 | 95.74 | 90.84 | 87.97 | 81.68 | 70.20 | 66.90 | 78.40 | |||||||||||||
1934 | 60.74 | 65.00 | 70.77 | 78.97 | a | 88.87 | 96.20 | 98.45 | 95.71 | 89.47 | 84.23 | 69.37 | 60.87 | 79.89 | ||||||||||||
1935 | 64.80 | a | 62.93 | 71.80 | f | 81.37 | 80.77 | 88.70 | 92.74 | 93.77 | 80.77 | 79.03 | 64.97 | 55.39 | 76.84 | a | ||||||||||
1936 | 58.48 | 64.41 | 73.32 | 80.60 | 84.48 | 94.60 | 95.19 | 97.26 | 82.97 | 73.55 | 62.90 | 59.35 | 77.26 | |||||||||||||
1937 | 52.94 | 62.32 | 62.32 | 80.63 | 86.74 | 93.60 | 97.13 | 94.71 | 86.07 | 74.26 | h | 69.40 | y | 56.65 | 77.31 | b | ||||||||||
1938 | 58.81 | 63.96 | 75.10 | a | 78.57 | 88.90 | 92.30 | 92.48 | 95.13 | 90.20 | 81.29 | 67.60 | 60.84 | 78.77 | ||||||||||||
1939 | 58.77 | 59.64 | 73.32 | 80.63 | 90.54 | c | 97.97 | 95.42 | 92.74 | 92.13 | 80.06 | 63.47 | 63.68 | 79.03 | ||||||||||||
1940 | 51.90 | 61.45 | 73.65 | 78.90 | 85.38 | b | 87.48 | g | 94.45 | b | 90.70 | a | 88.47 | 78.03 | 63.53 | 60.21 | c | 75.15 | a | |||||||
1941 | 57.42 | 59.04 | 63.26 | 72.20 | 79.71 | 85.23 | 91.65 | 92.61 | 84.63 | 76.71 | 67.90 | 60.29 | 74.22 | |||||||||||||
1942 | 56.48 | 62.82 | 69.05 | k | 75.57 | 86.03 | 93.36 | b | 94.60 | a | 89.65 | 84.68 | b | 77.89 | c | 73.75 | b | 62.77 | 77.96 | a | ||||||
1943 | 59.62 | b | 68.89 | a | 71.35 | 85.18 | b | 85.35 | 93.87 | 96.00 | 100.61 | c | 89.84 | e | 78.48 | 66.90 | 55.13 | 79.27 | ||||||||
1944 | 57.26 | 62.66 | 71.55 | b | 79.54 | b | 85.23 | 93.48 | a | 94.18 | t | 94.62 | b | 84.00 | t | 77.91 | i | 67.19 | d | 54.29 | 73.98 | c | ||||
1945 | 60.13 | 66.26 | e | 74.92 | f | 76.69 | d | 92.17 | a | 96.63 | 92.13 | 96.21 | b | 90.96 | e | 75.71 | 73.65 | m | 57.74 | h | 82.99 | c | ||||
1946 | 51.73 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.73 | k |
1947 | ----- | z | ----- | z | 69.41 | d | 82.63 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.41 | k |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | 88.42 | 97.00 | 95.16 | 93.18 | i | 88.93 | 77.13 | 66.97 | 65.06 | 82.67 | e | |||||||
1949 | 45.90 | a | 62.25 | 73.06 | 73.40 | 84.58 | 90.50 | 94.55 | 92.19 | 84.54 | b | 73.59 | b | 73.93 | 60.90 | 75.78 | ||||||||||
1950 | 64.61 | 69.79 | 74.06 | 80.73 | 86.10 | 91.70 | 89.94 | 92.03 | 85.57 | 84.52 | 72.40 | 64.23 | 79.64 | |||||||||||||
1951 | 58.97 | 66.39 | 69.97 | a | 79.33 | 87.71 | 95.80 | 97.29 | 95.58 | 89.70 | 80.90 | 66.27 | 62.90 | 79.23 | ||||||||||||
1952 | 64.26 | 65.31 | 67.73 | a | 74.77 | 87.13 | 94.90 | 91.00 | 97.55 | 85.90 | a | 81.45 | 61.50 | 60.32 | c | 77.65 | ||||||||||
1953 | 67.93 | a | 60.93 | 74.48 | 80.30 | 86.68 | 99.47 | 97.90 | 95.55 | 92.33 | 77.13 | 66.70 | 54.97 | 79.53 | ||||||||||||
1954 | 63.06 | 71.68 | 69.16 | 82.77 | 81.26 | 90.55 | j | 97.23 | 93.42 | 92.47 | 79.68 | 70.47 | 62.81 | 78.54 | a | |||||||||||
1955 | 54.61 | 62.82 | 72.32 | 82.37 | 86.71 | 94.03 | 91.10 | 92.10 | 88.23 | 79.13 | 67.10 | 64.45 | 77.91 | |||||||||||||
1956 | 60.94 | 58.62 | 75.03 | 78.10 | 90.26 | 96.83 | 96.77 | 95.39 | 92.40 | 81.55 | 66.63 | 62.68 | 79.60 | |||||||||||||
1957 | 58.14 | b | 64.82 | 69.65 | 77.27 | 82.16 | 92.87 | 98.03 | 94.84 | 87.70 | 72.94 | 56.97 | 63.45 | 76.57 | ||||||||||||
1958 | 53.13 | 58.93 | 58.94 | 72.87 | 87.84 | 97.67 | 98.71 | 96.29 | 86.40 | 73.10 | 67.33 | 60.26 | 75.95 | |||||||||||||
1959 | 59.13 | 59.33 | a | 70.32 | 76.20 | 85.65 | 93.57 | 93.32 | 96.13 | 91.63 | 77.42 | 62.90 | 58.55 | 77.01 | ||||||||||||
1960 | 55.19 | 57.24 | 67.32 | 83.30 | 89.29 | 98.77 | 92.03 | 93.16 | 91.33 | 80.55 | 69.27 | 51.03 | 77.37 | |||||||||||||
1961 | 55.94 | 63.43 | 70.74 | 81.50 | 89.32 | 92.43 | 90.74 | 92.81 | 89.27 | 82.58 | 60.50 | 58.32 | 77.30 | |||||||||||||
1962 | 54.00 | 71.39 | 67.45 | 80.00 | 92.94 | 91.67 | 93.55 | 96.16 | 84.97 | 80.48 | 69.23 | 60.58 | 78.54 | |||||||||||||
1963 | 57.90 | 66.50 | 74.32 | 83.60 | 88.68 | 90.70 | 93.87 | 92.39 | 87.80 | 83.84 | 68.80 | 52.19 | 78.38 | |||||||||||||
1964 | 57.42 | 56.52 | 69.52 | 80.73 | 88.42 | 94.47 | 97.42 | 95.87 | 82.63 | 78.23 | 66.40 | 56.97 | 77.05 | |||||||||||||
1965 | 60.58 | 55.89 | 61.32 | 79.57 | 83.58 | 90.17 | 94.87 | 90.10 | 86.77 | 78.97 | 72.33 | 59.84 | 76.17 | |||||||||||||
1966 | 49.68 | 55.25 | 69.94 | 73.33 | 81.32 | 89.50 | 96.39 | 88.35 | 84.10 | 75.19 | 72.57 | 57.03 | 74.39 | |||||||||||||
1967 | 60.16 | 62.18 | 75.77 | 81.27 | 86.58 | 91.53 | 92.06 | 90.77 | 82.00 | 79.19 | 64.97 | 52.68 | 76.60 | |||||||||||||
1968 | 53.29 | 55.59 | 63.58 | 72.87 | 82.39 | 90.93 | 88.71 | 89.06 | 85.27 | 80.48 | 63.10 | 59.00 | 73.69 | |||||||||||||
1969 | 61.26 | 60.54 | 57.26 | 77.57 | 83.19 | 91.30 | 96.19 | 94.52 | 84.33 | 70.65 | 63.77 | 60.39 | 75.08 | |||||||||||||
1970 | 55.19 | 60.68 | 60.90 | 75.60 | 84.87 | 89.50 | 94.16 | 94.26 | 85.33 | 71.94 | 65.23 | 64.45 | 75.18 | |||||||||||||
1971 | 59.35 | 59.18 | 69.90 | 75.80 | 84.58 | 92.50 | 94.16 | 84.29 | 84.77 | 76.55 | 68.40 | 58.29 | 75.65 | |||||||||||||
1972 | 60.42 | 64.90 | 77.90 | 84.30 | 84.84 | 95.37 | 92.84 | 89.87 | 86.73 | 76.84 | 58.87 | 56.84 | 77.48 | |||||||||||||
1973 | 48.48 | 54.82 | 65.90 | 71.73 | 83.19 | 93.53 | 93.32 | 93.94 | 86.87 | 83.03 | 72.77 | 62.65 | 75.85 | |||||||||||||
1974 | 58.29 | 64.96 | 78.39 | 81.00 | 90.90 | 95.17 | 97.13 | 90.32 | 76.37 | 73.68 | 62.80 | 54.77 | 76.98 | |||||||||||||
1975 | 56.65 | 58.61 | 66.55 | 76.07 | 83.45 | 93.33 | 87.90 | 90.32 | 81.63 | 80.74 | 69.20 | 60.06 | 75.38 | |||||||||||||
1976 | 58.65 | 70.66 | 71.26 | 79.10 | 81.13 | 92.90 | 88.29 | 94.26 | 84.17 | 71.13 | 57.70 | 58.48 | 75.64 | |||||||||||||
1977 | 50.55 | 63.11 | 68.39 | 75.93 | 86.16 | 95.57 | 96.58 | 96.94 | 95.77 | 79.39 | 70.13 | 62.00 | 78.38 | |||||||||||||
1978 | 49.84 | 51.07 | 69.87 | 85.57 | 87.32 | 94.47 | 98.16 | 94.65 | 83.33 | 77.48 | 61.97 | 54.77 | 75.71 | |||||||||||||
1979 | 46.52 | 59.96 | 66.45 | 79.37 | 83.19 | 87.93 | 95.48 | 91.52 | 89.37 | 84.58 | 62.70 | 59.61 | 75.56 | |||||||||||||
1980 | 56.53 | a | 60.17 | 69.32 | 77.67 | 84.42 | 98.57 | 100.48 | 94.48 | 86.30 | 75.61 | 61.07 | 61.65 | 77.19 | ||||||||||||
1981 | 55.48 | 63.71 | 64.61 | 78.60 | 83.74 | 93.03 | 96.06 | 89.68 | 86.40 | 75.26 | 71.70 | 62.90 | 76.77 | |||||||||||||
1982 | 58.00 | a | 58.04 | 70.97 | 75.73 | 83.35 | 91.73 | 96.16 | 96.45 | 90.07 | b | 77.39 | 63.47 | 52.61 | 76.16 | |||||||||||
1983 | 52.77 | 59.14 | 69.39 | 72.53 | 87.13 | 92.27 | 97.55 | 98.10 | 91.87 | 78.06 | 66.00 | 47.00 | 75.98 | |||||||||||||
1984 | 51.42 | 63.59 | 67.90 | 77.77 | 87.00 | 88.70 | 92.29 | 90.23 | 84.53 | 70.42 | 63.27 | 56.77 | 74.49 | |||||||||||||
1985 | 50.84 | 55.11 | 68.90 | 80.20 | 88.03 | 88.73 | 93.55 | 95.65 | 84.87 | 72.29 | 67.93 | 55.42 | 75.13 | |||||||||||||
1986 | 61.26 | 63.04 | 72.77 | 82.73 | 87.73 | a | 85.77 | 92.06 | 90.77 | 83.00 | 72.52 | 62.33 | 51.77 | 75.48 | ||||||||||||
1987 | 54.16 | 58.11 | 63.42 | 75.63 | 83.00 | 88.17 | 92.87 | 94.00 | a | 84.20 | 80.26 | 66.43 | 55.55 | 74.65 | ||||||||||||
1988 | 50.45 | 59.72 | 71.26 | 77.59 | a | 83.94 | 90.83 | 88.81 | 89.52 | 85.27 | 78.23 | 71.10 | 56.52 | 75.27 | ||||||||||||
1989 | 59.26 | 56.71 | 71.84 | 80.87 | 89.23 | 90.63 | 94.42 | 91.19 | 83.97 | 81.48 | 68.67 | 50.71 | 76.58 | |||||||||||||
1990 | 59.19 | 64.50 | 65.16 | 76.03 | 84.23 | 100.00 | 88.42 | 88.39 | 85.13 | 77.23 | 68.37 | 55.42 | 76.01 | |||||||||||||
1991 | 49.45 | 63.57 | 71.10 | 80.17 | 90.26 | 92.50 | 89.19 | 88.48 | 77.90 | 78.71 | 57.50 | 53.81 | 74.39 | |||||||||||||
1992 | 50.65 | 62.59 | 71.10 | 75.83 | 79.13 | 88.10 | 92.77 | 88.52 | 88.53 | 80.61 | 61.13 | 56.26 | 74.60 | |||||||||||||
1993 | 52.13 | 56.43 | 66.90 | 76.57 | 82.90 | 92.03 | 94.10 | 93.35 | 84.80 | 75.61 | 60.60 | 59.23 | 74.55 | |||||||||||||
1994 | 56.26 | 58.75 | 68.68 | 77.57 | 80.94 | 97.97 | 96.06 | 93.10 | 86.37 | 77.26 | 65.93 | 59.94 | 76.57 | |||||||||||||
1995 | 55.55 | 64.36 | 65.71 | 77.17 | 83.39 | 90.70 | 96.00 | 91.71 | 82.63 | 78.17 | a | 67.40 | 57.97 | 75.90 | ||||||||||||
1996 | 57.87 | 63.86 | 65.77 | 77.53 | 94.48 | 92.97 | 92.58 | 88.97 | 82.00 | 77.74 | 66.70 | 60.81 | 76.77 | |||||||||||||
1997 | 51.61 | 53.50 | 71.84 | 69.73 | 82.23 | 88.73 | 94.65 | 92.71 | 89.13 | 76.29 | 61.77 | 51.71 | 73.66 | |||||||||||||
1998 | 60.74 | 59.57 | 65.48 | 76.10 | 93.03 | 100.10 | 99.26 | 90.84 | 91.03 | 79.32 | 66.30 | 57.55 | 78.28 | |||||||||||||
1999 | 61.84 | 68.54 | 66.65 | 77.30 | 82.87 | 89.90 | 94.61 | 94.77 | 84.50 | 79.06 | 73.07 | 57.35 | 77.54 | |||||||||||||
2000 | 60.94 | 69.52 | 71.61 | 79.43 | 91.83 | a | 88.67 | 96.55 | 95.45 | 91.93 | 74.13 | 55.13 | 50.29 | 77.12 | ||||||||||||
2001 | 49.87 | 60.54 | 60.35 | 79.83 | 88.58 | 95.87 | 98.23 | 93.48 | 86.57 | 78.68 | 64.67 | 57.90 | 76.21 | |||||||||||||
2002 | 57.94 | 56.93 | 65.68 | 77.73 | 86.26 | 93.87 | 91.87 | 95.13 | 87.63 | 71.16 | 59.83 | 54.13 | 74.85 | |||||||||||||
2003 | 58.71 | 56.89 | 69.68 | 81.30 | 87.81 | 89.20 | 93.68 | 95.16 | 84.10 | 79.58 | 64.37 | 59.90 | 76.70 | |||||||||||||
2004 | 55.94 | 55.55 | 68.23 | 73.03 | 87.26 | 92.40 | 92.61 | 89.68 | 82.80 | 76.00 | 59.07 | 55.58 | 74.01 | |||||||||||||
2005 | 58.06 | 56.39 | 65.68 | 76.93 | 80.77 | 93.63 | 93.84 | 90.29 | 91.27 | 74.65 | 68.53 | 57.03 | 75.59 | |||||||||||||
2006 | 63.71 | 61.64 | 68.42 | 82.10 | 91.16 | 95.30 | 95.10 | 91.10 | 81.00 | 75.35 | 68.33 | 54.52 | 77.31 | |||||||||||||
2007 | 46.58 | 58.93 | 70.87 | 71.83 | 77.03 | 87.43 | 89.16 | 92.13 | 86.53 | 81.94 | 65.43 | 57.45 | 73.78 | |||||||||||||
2008 | 54.29 | 64.97 | 69.39 | 78.10 | 86.39 | 97.10 | 91.16 | 90.26 | 80.77 | 75.52 | 66.30 | 57.32 | 75.96 | |||||||||||||
2009 | 58.84 | 66.71 | 70.94 | 77.40 | 84.35 | 92.63 | 91.68 | 94.48 | 83.13 | 75.03 | 69.57 | 51.07 | d | 76.32 | ||||||||||||
2010 | 53.93 | a | 51.68 | 65.74 | 76.81 | d | 82.29 | 96.17 | 86.52 | 94.45 | 87.93 | 78.97 | 67.30 | 60.35 | 75.18 | |||||||||||
2011 | 56.35 | 59.93 | 76.71 | 85.23 | 87.26 | 100.97 | 98.03 | 99.45 | 87.83 | 80.03 | 67.73 | 48.84 | 79.03 | |||||||||||||
2012 | 61.23 | a | 61.17 | 75.48 | b | 82.48 | e | 90.62 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.09 | h | |
2013 | ----- | z | 59.75 | 69.52 | 76.50 | 85.84 | 94.63 | 89.39 | 93.35 | 86.10 | 75.81 | 60.43 | 51.47 | a | 76.62 | a | ||||||||||
2014 | 55.97 | 60.07 | 69.00 | 77.20 | 83.97 | a | 92.71 | b | 92.65 | 93.35 | 79.40 | 78.90 | 59.00 | 57.30 | a | 74.96 | ||||||||||
2015 | 48.71 | 58.32 | 65.42 | 76.37 | 81.70 | a | 89.97 | a | 94.71 | 94.85 | d | 90.44 | c | 75.00 | a | 64.10 | 59.59 | b | 74.93 | |||||||
2016 | 59.52 | d | 63.83 | 69.62 | b | 75.03 | 81.71 | 90.17 | 96.68 | 88.06 | 78.61 | b | 77.97 | 65.52 | a | 56.97 | 75.31 | |||||||||
2017 | 56.39 | 69.44 | a | 76.03 | 77.80 | 82.23 | 90.97 | 91.57 | a | 88.29 | 86.23 | 75.61 | 69.87 | 57.52 | 76.83 | |||||||||||
2018 | 56.55 | 63.96 | 72.81 | 78.60 | 93.97 | 96.67 | 94.35 | 92.58 | 82.00 | 71.29 | 59.53 | 55.23 | 76.46 | |||||||||||||
2019 | 56.42 | 62.93 | 63.45 | 78.67 | 82.45 | 90.97 | 93.90 | 97.77 | 91.00 | 74.60 | a | 62.73 | 60.39 | 76.27 | ||||||||||||
2020 | 60.07 | a | 56.79 | 68.52 | 77.00 | 90.10 | 94.28 | a | 98.71 | 97.94 | 84.60 | 77.52 | 72.20 | 59.06 | 78.06 | |||||||||||
2021 | 54.13 | 52.36 | 70.68 | 72.63 | 82.90 | a | 92.63 | 89.50 | a | 90.35 | 89.63 | 81.80 | a | 69.70 | 69.23 | 76.30 | ||||||||||
2022 | 56.13 | 57.14 | 69.94 | 82.34 | a | 93.16 | 95.46 | q | 99.69 | e | 93.48 | 89.03 | 77.97 | 61.90 | 58.43 | a | 76.29 | a | ||||||||
2023 | 59.96 | c | 59.21 | 73.77 | 76.55 | a | 86.87 | 95.80 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.36 | f | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.59 | 61.25 | 69.15 | 78.11 | 85.67 | 93.09 | 94.13 | 92.94 | 86.48 | 77.55 | 65.74 | 57.83 | 76.45 | |||||||||||||
S.D. | 4.46 | 4.57 | 4.32 | 3.41 | 3.57 | 3.29 | 3.02 | 3.05 | 3.78 | 3.39 | 4.20 | 4.27 | 1.62 | |||||||||||||
SKEW | -0.24 | 0.34 | -0.20 | -0.04 | 0.34 | 0.14 | -0.25 | -0.17 | -0.17 | -0.17 | -0.19 | -0.13 | 0.31 | |||||||||||||
MAX | 67.93 | 73.71 | 79.13 | 85.57 | 94.48 | 100.97 | 100.48 | 100.61 | 95.77 | 84.58 | 73.93 | 69.23 | 79.89 | |||||||||||||
MIN | 45.90 | 51.07 | 57.26 | 69.73 | 77.03 | 85.23 | 86.52 | 84.29 | 76.37 | 70.29 | 55.13 | 47.00 | 73.27 | |||||||||||||
YRS | 95 | 94 | 93 | 95 | 96 | 94 | 95 | 95 | 96 | 94 | 93 | 94 | 81 |