YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.19 | i | 81.97 | 69.69 | a | 59.90 | 70.52 | i | ||
1938 | 59.45 | 53.82 | 58.23 | a | 70.87 | 81.35 | 89.80 | 96.45 | 94.84 | 89.59 | a | 75.06 | 59.80 | 56.84 | 73.84 | |||||||||||
1939 | 54.23 | 50.77 | b | 63.06 | 75.13 | 82.20 | a | 90.47 | 98.06 | 97.87 | ----- | z | 74.65 | 70.10 | 61.71 | 74.39 | a | |||||||||
1940 | 55.83 | a | 56.68 | a | 65.48 | 73.53 | 86.35 | 96.00 | 95.52 | 98.00 | 84.10 | 78.35 | 60.73 | 58.00 | 75.72 | |||||||||||
1941 | 54.87 | 57.57 | 62.06 | 62.47 | ----- | z | ----- | z | ----- | z | ----- | z | 86.55 | a | 70.13 | 65.85 | c | 52.06 | 63.95 | d | ||||||
1942 | 55.13 | a | 56.19 | a | 65.55 | 70.40 | 79.87 | 92.17 | 102.71 | 98.93 | d | 88.97 | a | 80.38 | e | 65.64 | b | 59.84 | 76.31 | |||||||
1943 | 55.97 | 61.67 | a | 66.16 | 75.03 | 82.84 | 86.53 | 99.58 | 96.97 | 93.77 | 78.16 | 65.53 | 51.81 | 76.17 | ||||||||||||
1944 | 51.90 | 51.66 | 62.39 | 69.93 | a | 81.00 | 84.37 | 97.33 | a | 98.77 | 92.10 | 79.58 | 57.93 | 56.58 | 73.63 | |||||||||||
1945 | ----- | z | 52.18 | f | ----- | z | ----- | z | ----- | z | 90.77 | 102.13 | 95.26 | 90.33 | 76.23 | 63.10 | 52.61 | 81.49 | e | |||||||
1946 | 55.84 | 57.54 | 63.60 | a | 77.03 | 82.06 | 90.97 | 98.00 | 98.55 | 89.87 | 70.48 | 51.70 | 54.39 | 74.17 | ||||||||||||
1947 | 54.16 | 62.54 | 67.00 | 73.53 | 87.32 | 89.13 | 98.10 | 94.45 | 93.17 | 77.48 | 58.70 | 51.94 | 75.63 | |||||||||||||
1948 | 60.06 | 56.21 | 58.10 | 71.07 | 79.94 | 90.43 | 97.16 | f | 97.45 | 91.10 | 77.29 | 62.47 | 50.77 | 72.26 | a | |||||||||||
1949 | 39.81 | 52.86 | 60.61 | 77.80 | 80.32 | 93.77 | 99.13 | 95.74 | 92.73 | 75.39 | 72.30 | 52.97 | a | 74.45 | ||||||||||||
1950 | 49.35 | 63.18 | 66.45 | 77.83 | 83.35 | 91.63 | 99.42 | 98.77 | 86.80 | 82.00 | 69.07 | 62.57 | j | 78.90 | a | |||||||||||
1951 | 55.39 | 57.71 | 65.39 | 73.23 | 83.71 | 93.10 | 100.68 | 96.90 | 95.10 | 75.71 | 61.63 | 51.43 | a | 75.83 | ||||||||||||
1952 | 47.45 | 57.28 | 54.81 | 72.20 | 85.74 | 86.57 | 98.87 | 99.00 | 90.70 | 84.84 | 58.57 | 51.94 | 74.00 | |||||||||||||
1953 | 60.61 | 58.96 | 65.61 | 69.96 | f | 72.35 | 87.90 | 101.71 | 95.90 | a | 93.20 | 75.93 | c | 64.90 | 56.16 | 75.75 | a | |||||||||
1954 | 54.81 | 64.61 | 59.20 | a | 77.73 | 87.26 | 88.57 | 100.10 | 93.61 | 89.87 | 78.65 | 66.28 | a | 52.84 | 76.13 | |||||||||||
1955 | 47.81 | 53.29 | 64.97 | 68.60 | 79.65 | 90.53 | 95.87 | 99.26 | 90.87 | 80.42 | 63.90 | 56.73 | a | 74.32 | ||||||||||||
1956 | 57.77 | 55.00 | 66.61 | 69.37 | 80.61 | 93.53 | 96.19 | 94.65 | 92.97 | 73.84 | 65.50 | 58.00 | 75.34 | |||||||||||||
1957 | 47.19 | 62.75 | 64.58 | 71.40 | 77.81 | 94.27 | 98.19 | 95.32 | 88.33 | 70.03 | a | 58.37 | 57.23 | 73.79 | ||||||||||||
1958 | 56.81 | 59.14 | 55.77 | 69.03 | 85.63 | a | 89.52 | a | 96.29 | 99.55 | 90.27 | 79.74 | 63.87 | 62.65 | 75.69 | |||||||||||
1959 | 57.77 | 54.04 | a | 69.71 | 79.77 | 79.42 | 95.80 | 102.90 | 95.71 | 85.80 | 79.77 | 67.37 | 56.19 | 77.02 | ||||||||||||
1960 | 48.48 | 54.59 | 69.16 | 74.03 | 82.52 | 97.73 | 101.03 | 98.19 | 92.80 | 75.84 | 60.93 | 54.84 | 75.85 | |||||||||||||
1961 | 57.40 | k | 62.41 | a | 64.61 | 76.27 | 78.47 | a | 96.83 | 101.39 | 95.68 | 85.67 | 75.81 | 59.37 | 51.94 | 77.13 | a | |||||||||
1962 | 54.29 | 53.96 | 59.16 | 79.10 | a | 78.20 | a | 92.40 | 97.77 | 98.20 | a | 91.83 | 78.23 | 66.93 | 59.35 | 75.79 | ||||||||||
1963 | 54.16 | 66.54 | b | 61.87 | 65.70 | 83.39 | 86.07 | a | 97.58 | 94.57 | a | 89.27 | 76.55 | b | 62.67 | 57.45 | 74.65 | |||||||||
1964 | 52.32 | 58.66 | 62.16 | 70.77 | 78.58 | 88.83 | 98.48 | 96.77 | 87.47 | 83.45 | 57.07 | 55.73 | a | 74.19 | ||||||||||||
1965 | 57.48 | 61.04 | 61.53 | a | 66.20 | 77.29 | 86.14 | a | 96.19 | 95.68 | 83.17 | 83.39 | 61.33 | 50.90 | 73.36 | |||||||||||
1966 | 51.55 | 54.36 | 67.65 | 77.33 | 86.19 | 93.48 | a | 97.29 | 99.00 | a | 88.87 | 76.37 | a | 62.14 | b | 54.71 | 75.74 | |||||||||
1967 | 56.27 | a | 63.41 | a | 64.35 | 58.53 | 80.10 | 88.17 | 100.97 | 100.19 | 87.76 | a | 81.16 | 67.03 | 48.61 | 74.71 | ||||||||||
1968 | 54.23 | a | 62.72 | 64.71 | 71.23 | 81.65 | 93.28 | a | 98.74 | 91.52 | 89.87 | 77.00 | 62.57 | 51.00 | 74.88 | |||||||||||
1969 | 55.58 | 50.64 | 61.71 | 71.83 | 84.84 | 87.47 | 97.90 | 100.93 | b | 90.54 | f | 72.13 | a | 63.27 | 57.26 | 73.05 | a | |||||||||
1970 | 54.23 | 60.26 | a | 62.74 | 66.87 | 82.97 | a | 92.20 | 99.97 | a | 99.68 | 88.07 | a | 74.00 | c | 63.13 | 48.68 | 74.40 | ||||||||
1971 | 54.77 | 59.39 | 65.19 | 69.90 | 75.23 | 89.90 | 99.45 | 98.90 | 88.73 | 72.03 | 62.40 | 47.48 | 73.62 | |||||||||||||
1972 | 52.65 | 62.48 | 74.42 | 72.87 | 83.58 | 92.77 | 100.65 | 95.42 | 86.63 | 69.42 | 57.43 | 49.65 | 74.83 | |||||||||||||
1973 | 49.13 | 54.54 | 56.39 | 69.69 | a | 85.32 | 94.87 | 100.50 | a | 97.56 | f | 87.62 | a | 76.71 | 60.90 | 57.61 | 72.12 | a | ||||||||
1974 | 49.47 | a | 59.46 | 65.39 | 70.59 | a | 82.94 | 95.63 | 96.74 | 95.58 | 93.20 | 75.10 | 62.80 | 51.71 | 74.88 | |||||||||||
1975 | 56.74 | 56.61 | 60.52 | 62.63 | 82.97 | 91.43 | 97.39 | 94.90 | 90.17 | 73.61 | 62.23 | 58.90 | a | 74.01 | ||||||||||||
1976 | 58.80 | a | 62.42 | q | 62.42 | 69.27 | 85.42 | 90.67 | 97.71 | 91.48 | 83.90 | 75.80 | a | 67.83 | 57.73 | a | 76.46 | a | ||||||||
1977 | 52.74 | 63.36 | 59.16 | 75.67 | 71.20 | a | 94.53 | 98.52 | 95.67 | a | 87.60 | 79.60 | a | 66.62 | a | 59.32 | 75.33 | |||||||||
1978 | 52.35 | 57.04 | 63.77 | 65.83 | a | 81.61 | 91.40 | 98.45 | 96.06 | 85.45 | a | 81.33 | a | 59.97 | 50.00 | 73.61 | ||||||||||
1979 | 47.16 | 54.27 | b | 61.45 | 72.41 | a | 82.71 | 92.82 | b | 99.17 | a | 94.14 | b | 93.77 | 78.00 | a | 61.07 | 58.58 | 74.63 | |||||||
1980 | 57.07 | a | 60.28 | 59.42 | 72.17 | a | 75.97 | 88.47 | 98.94 | 95.84 | 89.87 | 78.29 | 67.43 | 62.47 | a | 75.52 | ||||||||||
1981 | 57.19 | 63.11 | 61.93 | a | 76.30 | 82.87 | 97.07 | 100.55 | 100.29 | 91.07 | a | 71.23 | 64.33 | 58.23 | 77.01 | |||||||||||
1982 | 51.47 | a | 60.12 | b | 58.10 | 69.00 | a | 83.10 | b | 88.50 | b | 97.03 | 96.47 | a | ----- | z | 73.15 | e | 56.97 | a | 50.87 | 71.34 | a | |||
1983 | 55.43 | a | 56.04 | a | 59.87 | a | 63.64 | b | 81.69 | b | 90.37 | 96.03 | b | 93.07 | b | 90.93 | b | 75.66 | b | 61.46 | b | 55.13 | 73.28 | |||
1984 | 57.45 | 60.69 | 67.90 | b | 71.21 | a | 89.62 | b | 90.76 | a | 98.16 | 95.47 | a | 91.32 | b | 70.13 | a | 58.57 | 45.97 | 74.77 | ||||||
1985 | 52.07 | a | 58.79 | 62.03 | a | 78.14 | a | 81.87 | 97.27 | d | 99.17 | a | 96.45 | 81.88 | d | 76.50 | c | 58.03 | 55.76 | b | 74.83 | |||||
1986 | 60.76 | b | 60.14 | 68.07 | c | 71.29 | b | 83.48 | 92.96 | e | 93.58 | l | 98.43 | a | 80.59 | c | 73.75 | c | 63.97 | a | 54.52 | 73.45 | a | |||
1987 | 51.27 | a | 58.36 | 61.86 | c | 79.77 | d | 80.30 | d | 94.19 | c | 93.89 | c | 96.30 | a | 89.85 | c | 80.81 | e | 59.90 | a | 46.17 | a | 74.39 | ||
1988 | 52.50 | a | 61.61 | a | 67.52 | b | 72.67 | c | 81.44 | d | 89.90 | 100.43 | a | 95.57 | a | 88.86 | b | 84.29 | 63.50 | b | 53.03 | b | 75.94 | |||
1989 | 52.94 | 55.37 | a | 68.39 | 81.41 | c | 82.04 | d | 91.19 | c | 100.24 | b | 93.63 | d | 87.92 | d | 75.03 | 67.20 | 59.33 | a | 76.22 | |||||
1990 | 53.80 | a | 55.64 | 68.40 | a | 75.93 | 79.61 | 92.24 | a | 98.13 | 94.03 | 88.53 | 79.81 | 63.90 | 49.48 | 74.96 | ||||||||||
1991 | 52.74 | 65.85 | a | 55.72 | b | 69.79 | a | 77.00 | 88.14 | a | 97.29 | 94.79 | c | 90.33 | 81.23 | 65.34 | a | 54.65 | 74.41 | |||||||
1992 | 53.77 | 57.59 | 60.76 | b | 76.28 | a | 85.97 | b | 88.83 | 93.52 | 96.94 | 89.97 | 78.75 | c | 60.43 | 48.52 | 74.28 | |||||||||
1993 | 48.90 | a | 52.77 | b | 66.90 | 73.93 | b | 81.77 | a | 87.59 | c | 94.14 | b | 94.26 | 88.87 | 76.67 | a | 61.24 | a | 54.19 | 73.44 | |||||
1994 | 57.87 | 53.86 | 68.90 | 73.33 | 81.00 | b | 95.73 | 99.48 | 98.90 | b | 87.77 | 73.39 | 54.13 | 53.90 | 74.86 | |||||||||||
1995 | 50.00 | 65.00 | 60.87 | 68.50 | 74.70 | a | 87.07 | 97.16 | 97.19 | 92.00 | 80.63 | a | 72.03 | 56.84 | 75.17 | |||||||||||
1996 | 58.53 | a | 59.45 | 64.97 | a | 73.70 | c | 82.54 | c | 92.50 | 99.50 | a | 98.39 | 87.41 | c | 74.13 | a | 64.15 | c | 55.13 | a | 75.87 | ||||
1997 | 53.96 | d | 59.07 | 72.90 | 72.24 | e | 88.06 | 88.60 | 95.97 | 96.94 | 87.79 | a | 74.90 | a | 62.20 | 50.93 | a | 75.30 | ||||||||
1998 | 55.65 | 51.21 | 61.60 | a | 66.07 | 70.40 | a | 84.67 | c | 98.10 | a | 98.14 | c | 84.75 | b | 71.97 | 61.89 | c | 55.03 | a | 71.62 | |||||
1999 | 58.37 | a | 59.11 | 64.31 | b | 65.34 | a | 79.87 | 89.07 | 94.13 | a | 93.13 | 89.53 | 81.79 | b | 67.77 | 57.29 | 74.98 | ||||||||
2000 | 57.42 | 59.33 | b | 64.69 | b | 77.21 | b | 85.28 | b | 93.83 | 96.13 | 95.81 | 88.43 | 75.13 | a | 58.43 | 59.68 | 75.95 | ||||||||
2001 | 52.06 | 51.75 | 66.58 | 68.83 | 90.06 | 93.37 | 94.83 | a | 98.61 | 91.30 | 81.10 | a | 63.17 | 51.81 | 75.29 | |||||||||||
2002 | 53.94 | 62.57 | 63.97 | 75.59 | a | 82.00 | 94.10 | 99.74 | 96.39 | 89.53 | 75.23 | a | 64.76 | a | 52.07 | a | 75.82 | |||||||||
2003 | 62.10 | 55.32 | 65.55 | 64.89 | c | 82.23 | a | 93.87 | 100.39 | 95.42 | 92.17 | a | 82.77 | 57.00 | 53.29 | 75.42 | ||||||||||
2004 | 55.03 | 53.83 | 73.00 | 74.38 | a | 83.84 | 93.13 | 98.06 | 95.52 | 87.27 | 71.42 | 58.30 | 53.77 | 74.80 | ||||||||||||
2005 | 53.39 | 54.61 | 62.87 | a | 70.87 | 83.42 | 87.66 | a | 101.26 | 95.87 | 84.77 | 74.61 | 65.57 | 57.26 | 74.34 | |||||||||||
2006 | 54.48 | 61.52 | a | 56.84 | 69.23 | 85.80 | a | 94.43 | 99.65 | 93.93 | a | 87.53 | 73.77 | 67.87 | 54.68 | 74.98 | ||||||||||
2007 | 54.00 | 60.68 | 71.61 | 76.37 | 83.74 | 92.57 | b | 99.29 | 97.35 | 85.20 | 73.45 | 69.00 | 50.61 | 76.16 | ||||||||||||
2008 | 49.50 | a | 58.41 | 67.06 | 72.93 | 78.65 | 92.04 | b | 97.47 | a | 97.93 | b | 91.53 | 78.96 | e | 67.20 | 51.97 | b | 75.30 | |||||||
2009 | 59.00 | 54.64 | 64.61 | 71.17 | 88.39 | 86.27 | 100.77 | 95.84 | 93.43 | 76.48 | h | 67.30 | 53.58 | 75.91 | a | |||||||||||
2010 | 53.57 | c | 56.44 | a | 63.14 | c | 69.14 | b | 75.85 | d | 94.37 | c | 101.90 | k | 96.50 | k | 93.83 | 77.52 | f | 62.36 | b | 55.55 | b | 69.36 | c | |
2011 | 55.97 | b | 55.54 | b | 63.87 | h | 73.48 | e | 76.50 | e | 90.21 | a | 97.73 | a | 100.23 | 92.36 | e | 81.70 | a | 60.38 | a | 55.21 | l | 78.41 | b | |
2012 | 61.78 | v | 63.00 | o | 65.33 | j | 76.45 | j | 84.67 | p | 92.19 | c | 95.86 | c | 98.76 | b | 92.00 | 79.42 | 67.96 | b | 53.79 | b | 82.85 | e | ||
2013 | 52.10 | a | 59.33 | a | 72.03 | 76.67 | 82.97 | 94.87 | 99.29 | 95.13 | 88.27 | 74.52 | 64.60 | 56.77 | 76.38 | |||||||||||
2014 | 64.00 | 65.07 | 67.42 | 75.23 | 83.29 | 94.48 | a | 99.20 | a | 94.42 | e | 92.43 | 82.61 | 68.33 | l | 55.76 | f | 81.82 | b | |||||||
2015 | 60.72 | b | 68.74 | a | 72.32 | 76.32 | b | 81.76 | b | 95.04 | d | 94.37 | a | 100.00 | 92.93 | 81.10 | a | 61.43 | 53.68 | 78.20 | ||||||
2016 | 54.16 | 66.10 | 69.48 | 75.37 | 80.06 | 99.41 | a | 101.40 | a | 99.45 | 88.57 | 78.43 | a | 67.57 | 54.90 | 77.91 | ||||||||||
2017 | 50.87 | 59.39 | 70.73 | a | 75.44 | c | 83.94 | 97.67 | 102.73 | e | 99.65 | 90.30 | c | 82.23 | 72.31 | a | 64.50 | g | 80.48 | a | ||||||
2018 | 63.30 | a | 64.21 | d | 62.89 | d | 80.73 | d | 84.94 | 99.12 | d | 105.63 | l | 103.48 | j | 95.86 | i | 78.84 | f | 67.41 | a | 56.00 | l | 74.66 | e | |
2019 | 56.23 | e | 49.72 | j | 64.87 | a | 76.26 | c | 77.22 | d | 95.88 | n | 100.32 | f | 103.12 | e | 91.27 | o | 76.93 | a | 68.96 | b | 52.91 | i | 74.80 | e |
2020 | 58.48 | h | 67.73 | c | 60.69 | b | 76.44 | u | 90.00 | u | 91.82 | m | 98.79 | q | 100.57 | x | 96.70 | t | ----- | z | ----- | z | ----- | z | 64.21 | j |
2021 | ----- | z | 65.80 | w | ----- | z | ----- | z | ----- | z | ----- | z | 106.09 | t | 100.67 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | 60.00 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.41 | 58.59 | 64.18 | 72.32 | 81.74 | 91.70 | 98.46 | 96.74 | 89.34 | 77.09 | 63.37 | 54.48 | 75.06 | |||||||||||||
S.D. | 4.04 | 4.27 | 4.28 | 4.55 | 3.86 | 3.40 | 2.18 | 2.25 | 2.98 | 3.76 | 4.15 | 3.69 | 1.13 | |||||||||||||
SKEW | -0.39 | 0.21 | 0.11 | -0.45 | -0.56 | 0.03 | -0.18 | 0.12 | -0.54 | -0.02 | -0.09 | -0.05 | 0.10 | |||||||||||||
MAX | 64.00 | 68.74 | 74.42 | 81.41 | 90.06 | 99.41 | 102.90 | 103.12 | 95.10 | 84.84 | 72.31 | 62.65 | 78.20 | |||||||||||||
MIN | 39.81 | 50.64 | 54.81 | 58.53 | 70.40 | 84.37 | 93.52 | 91.48 | 80.59 | 69.42 | 51.70 | 45.97 | 71.62 | |||||||||||||
YRS | 79 | 79 | 80 | 79 | 79 | 80 | 76 | 78 | 77 | 80 | 82 | 77 | 62 |