YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.03 | b | 90.77 | 80.47 | 74.84 | 61.13 | 52.97 | 75.87 | f | |||||
1935 | ----- | z | 54.82 | 64.58 | 69.07 | 70.48 | 89.70 | 92.68 | 90.06 | 79.14 | a | 72.47 | a | 56.83 | 48.35 | 71.65 | a | |||||||||
1936 | 45.94 | 49.17 | 63.58 | 72.45 | a | 76.58 | 87.17 | 83.19 | e | 92.58 | ----- | z | 67.65 | 52.62 | a | 49.90 | 67.35 | a | ||||||||
1937 | 42.16 | 53.41 | a | 54.87 | 69.97 | 78.10 | a | 84.83 | 93.81 | 94.10 | a | ----- | z | 70.80 | f | 59.69 | a | 48.16 | 67.91 | b | ||||||
1938 | 51.06 | 51.89 | 63.87 | a | 68.10 | 76.70 | a | 86.73 | 90.81 | 94.55 | 81.77 | 73.06 | 56.97 | 48.39 | 70.32 | |||||||||||
1939 | 49.10 | 42.61 | 62.29 | 72.30 | 79.84 | 87.87 | 92.10 | a | 90.19 | 87.14 | a | 73.57 | a | 58.47 | 54.97 | 70.87 | ||||||||||
1940 | 38.23 | 49.24 | 64.10 | 69.43 | 81.13 | a | 87.73 | 95.52 | 86.27 | a | 84.59 | a | 75.87 | a | 53.17 | 51.74 | 69.75 | |||||||||
1941 | 49.77 | 54.46 | 54.52 | 63.80 | 74.77 | 80.87 | 85.42 | 87.71 | 78.47 | 67.03 | 61.77 | 50.35 | 67.41 | |||||||||||||
1942 | 52.80 | a | 50.25 | 57.48 | h | 67.83 | a | 78.26 | 85.45 | a | 89.77 | 86.87 | 77.93 | 68.48 | 67.53 | 55.65 | 70.98 | a | ||||||||
1943 | 52.03 | 61.96 | 63.58 | 73.57 | 78.23 | a | 89.38 | a | 93.06 | 94.65 | 84.77 | 72.16 | 60.13 | 43.16 | 72.22 | |||||||||||
1944 | 44.06 | 51.86 | 60.90 | 65.83 | 77.61 | 87.43 | 87.84 | 88.26 | 82.53 | 72.03 | a | 60.21 | b | 49.36 | c | 69.00 | ||||||||||
1945 | 50.23 | a | 56.89 | a | 67.31 | b | 66.96 | b | 80.48 | 87.93 | b | 90.80 | a | 91.17 | b | 87.30 | c | 74.13 | a | 64.73 | 52.10 | 72.50 | ||||
1946 | 52.52 | 57.89 | a | 65.84 | 79.87 | 76.10 | a | 90.17 | 95.90 | 90.87 | a | 84.63 | c | 72.35 | 57.21 | a | 60.77 | 73.68 | ||||||||
1947 | 50.70 | a | 53.12 | c | 58.48 | 69.27 | 77.39 | 87.37 | 93.55 | 90.55 | 89.10 | 79.19 | 54.93 | a | 49.87 | 71.13 | ||||||||||
1948 | 46.50 | a | 46.17 | 52.32 | 76.17 | 77.44 | d | 87.97 | 93.13 | 86.48 | 78.13 | ----- | z | 57.30 | 55.16 | 68.80 | a | |||||||||
1949 | 40.10 | a | 51.11 | 63.58 | 67.72 | a | 78.41 | b | 84.87 | 90.42 | 89.19 | 82.37 | 73.81 | 73.39 | b | 52.81 | 70.65 | |||||||||
1950 | 58.97 | 62.79 | 64.74 | 75.03 | 80.58 | 90.67 | 87.87 | 89.13 | a | 78.93 | 81.30 | a | 64.62 | a | 57.87 | 74.38 | ||||||||||
1951 | 50.58 | 58.52 | a | 60.90 | 70.57 | 79.35 | 84.83 | 92.35 | 91.26 | 86.03 | 74.26 | 58.53 | 51.94 | 71.59 | ||||||||||||
1952 | 54.70 | a | 56.28 | 58.23 | 70.13 | 77.45 | b | 93.43 | 92.33 | a | 92.39 | 81.59 | a | 73.58 | 53.17 | 48.45 | 70.98 | |||||||||
1953 | 60.19 | 52.11 | 64.87 | 70.13 | 77.68 | 96.67 | 93.03 | 89.03 | 89.90 | 74.47 | a | 63.66 | a | 48.58 | 73.36 | |||||||||||
1954 | 53.94 | 65.22 | a | 61.32 | 79.73 | 75.13 | 91.27 | 95.30 | a | 90.68 | 87.07 | a | 73.60 | a | 65.47 | 58.52 | 74.77 | |||||||||
1955 | 50.52 | 52.44 | a | 64.35 | 70.97 | a | 76.23 | 86.37 | 91.13 | 91.90 | 86.97 | a | 76.57 | a | 60.63 | 59.03 | 72.26 | |||||||||
1956 | 55.80 | a | 54.00 | 67.35 | 70.83 | a | 85.97 | 92.72 | a | 92.29 | 91.16 | 89.83 | 78.03 | 60.17 | 57.77 | 74.66 | ||||||||||
1957 | 52.81 | 62.32 | 59.45 | 65.41 | a | 74.39 | 88.50 | 96.13 | 89.48 | 83.86 | a | 67.90 | 50.67 | 60.23 | a | 70.93 | ||||||||||
1958 | 50.43 | a | 53.79 | 47.27 | a | 65.79 | a | 81.35 | 91.30 | 88.74 | 93.52 | 82.73 | 71.52 | 64.87 | 53.26 | 70.38 | ||||||||||
1959 | 47.93 | a | 53.04 | 60.69 | b | 70.03 | 79.61 | 90.53 | 91.58 | 90.97 | 86.07 | 70.47 | a | 61.73 | 52.58 | 71.27 | ||||||||||
1960 | 44.62 | b | 44.41 | 63.03 | a | 74.50 | 81.19 | 89.03 | 86.58 | 91.35 | 83.70 | 71.27 | a | 61.23 | 45.87 | 69.73 | ||||||||||
1961 | 53.48 | 55.79 | 60.45 | 70.47 | 80.77 | 89.79 | a | 91.94 | 89.19 | 79.90 | a | 71.24 | b | 51.38 | a | 48.43 | a | 70.24 | ||||||||
1962 | 47.23 | 59.33 | a | 61.10 | a | 74.28 | a | 86.23 | 85.03 | 90.71 | 92.87 | 83.69 | a | 76.19 | 62.17 | 53.97 | 72.73 | |||||||||
1963 | 46.97 | 58.21 | 65.77 | 76.40 | 83.58 | 88.37 | 96.03 | 89.68 | 84.70 | 79.13 | 63.03 | a | 48.35 | 73.35 | ||||||||||||
1964 | 52.45 | 44.66 | 61.10 | 72.23 | 83.94 | 90.93 | 97.50 | a | 91.10 | a | 81.41 | a | 75.19 | 58.24 | a | 49.50 | a | 71.52 | ||||||||
1965 | 56.00 | 54.37 | a | 54.13 | 75.62 | a | 80.00 | a | 83.57 | 91.48 | 89.70 | a | 81.03 | 76.00 | a | 68.07 | 55.45 | 72.12 | ||||||||
1966 | 45.72 | b | 51.61 | 68.67 | a | 74.53 | 85.71 | 88.67 | 96.45 | 86.57 | a | 83.83 | 74.65 | 66.30 | 50.65 | 72.78 | ||||||||||
1967 | 56.16 | 58.50 | 72.65 | 76.37 | 80.60 | a | 86.97 | a | 90.26 | 88.10 | 82.50 | 80.43 | a | 63.03 | 49.03 | 73.72 | ||||||||||
1968 | 54.26 | 54.48 | 63.23 | 71.24 | a | 79.94 | 92.53 | 90.55 | 89.87 | 86.47 | 78.97 | 56.80 | 52.00 | 72.53 | ||||||||||||
1969 | 58.03 | 54.25 | 51.87 | 73.73 | 81.68 | 85.70 | 94.13 | 92.32 | 81.93 | 67.32 | 61.97 | 54.06 | 71.42 | |||||||||||||
1970 | 50.45 | 60.89 | 58.94 | 69.77 | 83.17 | a | 89.87 | 91.90 | 92.80 | a | 84.70 | 67.10 | 62.20 | 58.29 | 72.51 | |||||||||||
1971 | 53.94 | 53.43 | 66.45 | 71.53 | 80.19 | 92.07 | 90.77 | 85.35 | 81.24 | a | 72.77 | 60.03 | 50.00 | 71.48 | ||||||||||||
1972 | 55.87 | 62.25 | a | 72.26 | 78.57 | 79.55 | 88.53 | 87.97 | 86.06 | 80.77 | 71.27 | a | 48.57 | 50.19 | 71.82 | |||||||||||
1973 | 46.81 | 53.32 | 59.16 | 64.47 | 77.03 | 89.50 | 91.03 | 93.68 | 82.37 | 77.97 | 65.83 | 52.84 | 71.17 | |||||||||||||
1974 | 51.19 | 60.61 | 71.29 | 74.33 | 89.03 | 93.10 | 94.68 | 85.90 | 77.63 | 73.23 | 58.70 | 49.06 | 73.23 | |||||||||||||
1975 | 50.13 | 51.04 | 62.90 | 69.63 | 79.48 | 88.40 | 88.81 | 92.68 | 81.07 | a | 77.45 | 60.53 | 56.35 | 71.54 | ||||||||||||
1976 | 53.03 | 62.66 | 63.16 | 74.63 | 77.69 | b | 89.30 | 90.29 | 89.58 | 82.97 | 68.65 | 58.10 | 54.16 | 72.02 | ||||||||||||
1977 | 46.71 | 59.96 | 62.61 | 71.43 | 82.00 | 94.66 | a | 95.10 | 91.39 | 86.28 | a | 77.03 | 63.57 | 56.45 | 73.93 | |||||||||||
1978 | 41.00 | 43.61 | 63.33 | a | 74.43 | 76.10 | 87.50 | 95.03 | 87.32 | 80.70 | 74.03 | b | 54.73 | 44.61 | 68.53 | |||||||||||
1979 | 37.21 | b | 53.14 | 60.26 | 68.27 | 73.06 | 84.00 | 90.45 | 86.77 | 84.40 | 75.68 | 53.07 | 55.10 | 68.45 | ||||||||||||
1980 | 48.45 | 53.45 | 59.29 | 67.80 | 73.00 | 92.77 | 97.65 | 90.23 | 81.50 | 71.68 | 58.20 | 58.90 | 71.08 | |||||||||||||
1981 | 53.97 | 57.93 | 58.45 | 75.86 | a | 75.94 | 90.40 | 91.68 | 84.03 | 79.52 | a | 67.81 | 63.03 | 53.23 | 70.99 | |||||||||||
1982 | 52.53 | a | 51.08 | c | 59.87 | a | 69.61 | b | 76.20 | a | 82.53 | 88.58 | 86.61 | 81.90 | 69.45 | b | 58.04 | d | 46.32 | c | 68.56 | |||||
1983 | 48.13 | 49.18 | 58.82 | c | 63.54 | b | 73.37 | a | 83.73 | 93.58 | 93.55 | 86.52 | a | 71.93 | c | 60.62 | a | 38.71 | c | 68.47 | ||||||
1984 | 46.38 | b | 57.96 | f | 59.15 | d | 65.48 | a | 79.41 | b | 87.00 | 90.94 | 86.71 | 82.43 | b | 64.33 | d | 59.18 | b | 50.63 | d | 70.15 | a | |||
1985 | 44.48 | d | 52.25 | d | 60.81 | d | 71.10 | 78.31 | b | 85.07 | a | 92.03 | 89.71 | 78.86 | a | 68.71 | 58.20 | 48.33 | a | 68.99 | ||||||
1986 | 58.77 | 52.46 | 65.77 | 72.62 | a | 79.39 | c | 83.50 | 93.00 | 88.77 | 80.79 | a | 66.77 | a | 55.14 | a | 46.70 | a | 70.31 | |||||||
1987 | 44.77 | 51.85 | a | 57.74 | 69.23 | 76.35 | 85.03 | 92.71 | q | 88.47 | a | 81.81 | c | 75.23 | 59.20 | 47.03 | 66.98 | a | ||||||||
1988 | 44.65 | 55.63 | b | 62.27 | a | 71.27 | 77.47 | a | 86.83 | a | 88.84 | 89.40 | f | 80.90 | 74.28 | b | 62.62 | a | 50.93 | c | 68.70 | a | ||||
1989 | 54.65 | 47.75 | d | 71.06 | 76.57 | 82.00 | c | 81.73 | 89.36 | c | 86.62 | e | 79.93 | b | 76.70 | a | 64.63 | 47.62 | j | 73.73 | a | |||||
1990 | 48.94 | 51.64 | 59.48 | 70.11 | c | 78.90 | a | 96.25 | b | 89.00 | a | 85.54 | e | 80.88 | f | 72.57 | c | 63.47 | 47.46 | e | 69.40 | a | ||||
1991 | 45.67 | d | 59.86 | 63.76 | b | 72.21 | b | 81.37 | d | 85.59 | a | 86.37 | a | ----- | z | 74.16 | k | 86.65 | k | 52.81 | c | 47.29 | 66.10 | c | ||
1992 | 50.61 | 58.04 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.71 | 51.79 | i | ||
1993 | 44.19 | 49.54 | 61.61 | 69.00 | 77.19 | 86.03 | 90.00 | 89.03 | 83.43 | 69.84 | 55.70 | ----- | z | 70.51 | a | |||||||||||
1994 | 52.00 | 53.82 | 61.13 | 68.93 | 76.06 | 94.37 | 93.06 | 90.58 | 84.23 | 71.26 | 58.50 | 55.71 | 71.64 | |||||||||||||
1995 | 49.32 | 59.32 | 59.90 | 67.27 | 73.70 | a | 83.13 | 90.13 | 92.16 | 81.57 | 74.19 | 63.50 | 50.35 | 70.38 | ||||||||||||
1996 | 52.17 | a | 57.34 | 58.83 | a | 71.27 | 85.61 | 87.00 | 85.35 | 84.35 | 75.90 | 69.50 | a | 58.57 | 47.65 | 69.46 | ||||||||||
1997 | 43.42 | 46.50 | 64.00 | 58.59 | a | 75.39 | 85.17 | 93.26 | 86.81 | 82.67 | 70.61 | 54.17 | 43.87 | 67.04 | ||||||||||||
1998 | 52.45 | 51.85 | a | 56.61 | 65.93 | b | 83.03 | a | 91.30 | 96.25 | w | ----- | z | 89.53 | 71.29 | 61.13 | 51.61 | 67.47 | b | |||||||
1999 | 53.39 | 60.86 | 59.26 | 66.90 | a | 74.39 | 85.11 | b | 91.65 | 90.74 | 79.77 | 72.77 | 67.53 | 51.07 | a | 71.12 | ||||||||||
2000 | 55.42 | 62.52 | 61.35 | 71.80 | 84.19 | 86.28 | a | 93.42 | 94.45 | 88.70 | 68.45 | 50.93 | 45.84 | 71.95 | ||||||||||||
2001 | 41.74 | 50.82 | 54.06 | 74.33 | 76.61 | 88.27 | 96.77 | 90.55 | 84.47 | 74.13 | 61.67 | 51.71 | 70.43 | |||||||||||||
2002 | 51.10 | 51.19 | a | 60.37 | a | 73.03 | 81.84 | 94.17 | a | 91.48 | 91.03 | 80.37 | 63.77 | 55.33 | 46.32 | 70.00 | ||||||||||
2003 | 53.23 | 49.57 | 62.55 | 71.70 | 80.48 | 81.73 | 96.66 | b | 92.70 | a | 81.53 | 75.71 | 57.97 | a | 54.71 | 71.54 | ||||||||||
2004 | 52.42 | 50.45 | 64.81 | 65.14 | a | 84.48 | f | 87.77 | 85.84 | 83.32 | 80.07 | 70.83 | g | 52.47 | 53.03 | 67.53 | b | |||||||||
2005 | 51.68 | 52.71 | 56.46 | c | 67.47 | 73.06 | 86.86 | a | 92.61 | 86.06 | 82.60 | 70.42 | 64.27 | 52.03 | 69.69 | |||||||||||
2006 | 58.16 | 56.32 | 60.93 | b | 75.76 | a | 83.16 | 92.83 | 92.73 | a | 85.13 | a | 76.00 | b | 70.10 | 62.80 | 47.77 | 71.81 | ||||||||
2007 | 39.03 | 51.44 | a | 65.48 | 64.70 | 75.73 | a | 86.33 | c | 91.35 | 94.50 | a | 84.68 | b | 76.13 | 63.86 | b | 47.52 | 70.06 | |||||||
2008 | 49.67 | a | 54.52 | 61.97 | 71.80 | 78.33 | a | 92.18 | b | 88.16 | 86.71 | 79.44 | c | 70.48 | 62.23 | 49.52 | b | 70.42 | ||||||||
2009 | 53.32 | 58.82 | f | 62.87 | 67.33 | 76.30 | a | 87.13 | 90.19 | 88.68 | 78.82 | b | 65.83 | b | 62.77 | 43.68 | 70.63 | a | ||||||||
2010 | 47.84 | 36.37 | a | 55.97 | 68.87 | 75.03 | 89.27 | 88.61 | 89.23 | 87.30 | 73.61 | 60.63 | 52.71 | 68.79 | ||||||||||||
2011 | 50.16 | 49.00 | a | 65.26 | 73.77 | 78.65 | 94.48 | a | 96.87 | 93.00 | a | 81.47 | 72.03 | 59.67 | 37.55 | 70.99 | ||||||||||
2012 | 54.16 | ----- | z | 67.71 | 74.70 | 80.87 | 89.17 | 93.81 | 91.13 | 83.57 | 69.58 | ----- | z | ----- | z | 78.30 | c | |||||||||
2013 | 45.03 | 49.64 | ----- | z | 64.80 | 79.16 | 92.57 | 88.68 | 90.87 | 82.40 | 69.97 | 55.37 | 46.19 | 69.52 | a | |||||||||||
2014 | 50.16 | 49.57 | 61.23 | 69.97 | 77.71 | 86.07 | 89.00 | 90.42 | 79.31 | a | 72.61 | 55.47 | 49.16 | 69.22 | ||||||||||||
2015 | 42.77 | 51.54 | 60.29 | 70.30 | 71.65 | 86.70 | 91.00 | 87.97 | 87.20 | 70.00 | 58.37 | 48.97 | 68.90 | |||||||||||||
2016 | 50.13 | 57.86 | 64.58 | 67.70 | 74.39 | 89.70 | 96.29 | 86.84 | 84.50 | 79.60 | a | 63.27 | 47.61 | 71.87 | ||||||||||||
2017 | 47.55 | 61.32 | 68.35 | 66.63 | 75.13 | 89.80 | 92.55 | 81.94 | 80.00 | 70.26 | 65.60 | 52.90 | 71.00 | |||||||||||||
2018 | 52.29 | 54.50 | 64.74 | 66.93 | 84.32 | 91.30 | 91.48 | 87.45 | 82.70 | 65.97 | 53.73 | 48.61 | 70.34 | |||||||||||||
2019 | 48.71 | 53.57 | 56.90 | 69.63 | 72.90 | 86.17 | a | 92.97 | 91.77 | 86.50 | 64.29 | 57.30 | 52.42 | 69.43 | ||||||||||||
2020 | 50.35 | 49.14 | 63.97 | 69.33 | 82.58 | 92.57 | 92.94 | 93.00 | 79.63 | 70.13 | a | 61.93 | 50.45 | 71.34 | ||||||||||||
2021 | 47.48 | 43.68 | 58.87 | 67.07 | 75.10 | 88.03 | 88.90 | 90.55 | 87.60 | 72.61 | 63.97 | 59.55 | 70.28 | |||||||||||||
2022 | 49.77 | 47.86 | 60.45 | 73.37 | 82.45 | 86.93 | 94.45 | 87.32 | 87.17 | 68.60 | a | ----- | z | 50.55 | 71.72 | a | ||||||||||
2023 | 49.94 | 52.82 | 59.77 | 69.17 | 78.52 | 82.07 | 92.10 | 92.72 | b | 86.18 | b | 72.63 | a | 61.60 | 54.76 | j | 72.50 | a | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 49.81 | 53.59 | 61.72 | 70.52 | 78.68 | 88.30 | 91.71 | 89.62 | 82.89 | 72.35 | 59.80 | 50.90 | 71.06 | |||||||||||||
S.D. | 4.79 | 5.28 | 4.43 | 3.89 | 3.64 | 3.45 | 3.00 | 2.85 | 3.23 | 3.83 | 4.54 | 4.48 | 1.68 | |||||||||||||
SKEW | -0.37 | -0.24 | -0.18 | -0.01 | 0.30 | 0.19 | -0.23 | -0.31 | 0.21 | 0.04 | -0.08 | -0.09 | 0.03 | |||||||||||||
MAX | 60.19 | 65.22 | 72.65 | 79.87 | 89.03 | 96.67 | 97.65 | 94.65 | 89.90 | 81.30 | 73.39 | 60.77 | 74.77 | |||||||||||||
MIN | 37.21 | 36.37 | 47.27 | 58.59 | 70.48 | 80.87 | 83.19 | 81.94 | 75.90 | 63.77 | 48.57 | 37.55 | 67.04 | |||||||||||||
YRS | 88 | 86 | 86 | 88 | 87 | 88 | 87 | 86 | 85 | 85 | 87 | 86 | 69 |