YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.27 | 75.23 | 61.17 | 56.77 | 69.11 | h | ||||
1937 | 52.45 | 60.61 | 64.29 | 77.67 | 86.68 | 94.23 | 97.29 | 96.29 | 88.67 | 79.16 | 69.50 | 57.16 | 77.00 | |||||||||||||
1938 | 57.03 | 62.11 | 69.06 | 76.70 | 85.71 | 93.60 | 92.83 | a | 94.39 | 85.27 | 79.30 | a | 62.63 | 59.53 | a | 76.51 | ||||||||||
1939 | 53.03 | 54.36 | 68.52 | 77.83 | 87.26 | 97.30 | 96.97 | 94.06 | 89.20 | 77.20 | a | 63.47 | 62.63 | a | 76.82 | |||||||||||
1940 | 56.00 | a | 62.38 | 71.10 | a | 78.00 | 87.33 | a | 93.39 | b | 97.45 | 94.23 | a | 88.31 | a | 79.68 | 63.33 | 60.97 | 77.68 | |||||||
1941 | 55.37 | a | 62.96 | 65.13 | 71.86 | a | 85.97 | 91.63 | 94.58 | 91.81 | 87.24 | a | 75.03 | 65.93 | 57.29 | 75.40 | ||||||||||
1942 | 57.32 | 59.11 | 66.74 | 76.27 | 87.65 | 98.93 | 98.03 | 90.35 | 84.87 | 75.65 | 71.40 | 61.81 | 77.34 | |||||||||||||
1943 | 59.16 | 67.36 | 71.55 | 83.50 | 89.10 | a | 94.07 | 95.06 | 97.48 | 87.79 | a | 77.94 | 66.87 | 53.30 | a | 78.60 | ||||||||||
1944 | 54.65 | 61.45 | 68.06 | 75.80 | 85.72 | b | 94.87 | 95.94 | 94.68 | 86.60 | 77.19 | 60.03 | 55.65 | 75.89 | ||||||||||||
1945 | 56.16 | 64.46 | 66.35 | 75.57 | 87.32 | 93.80 | 95.45 | 95.35 | 90.07 | 77.16 | 69.07 | 56.45 | 77.27 | |||||||||||||
1946 | 53.48 | 64.57 | 72.10 | 84.00 | 86.90 | 98.93 | 96.87 | 94.23 | 89.07 | 78.55 | 63.50 | 61.03 | 78.60 | |||||||||||||
1947 | 53.52 | 65.82 | 71.60 | a | 77.97 | 88.84 | 94.87 | 98.42 | 92.40 | a | 91.93 | 82.42 | 61.07 | 55.42 | 77.86 | |||||||||||
1948 | 50.87 | a | 53.18 | a | 63.35 | 81.70 | 88.45 | 95.77 | 97.42 | 96.35 | 89.87 | 76.52 | 62.50 | 58.29 | 76.19 | |||||||||||
1949 | 44.55 | 60.75 | 70.85 | k | 76.80 | 86.20 | a | 93.97 | 94.81 | 94.48 | 87.73 | 75.52 | 72.93 | 55.84 | 76.69 | a | ||||||||||
1950 | 60.32 | 66.82 | 72.10 | 81.13 | 86.00 | 97.23 | 92.19 | 94.13 | 88.27 | 85.10 | 71.60 | 65.93 | a | 80.07 | ||||||||||||
1951 | 59.55 | 60.75 | 67.39 | 75.70 | 86.52 | 95.77 | 99.87 | 93.90 | 93.10 | 80.90 | 63.80 | 56.81 | 77.84 | |||||||||||||
1952 | 60.42 | 60.54 | a | 62.32 | 75.17 | 85.16 | 95.13 | 94.52 | 95.77 | 90.10 | 82.19 | 62.70 | 54.48 | 76.54 | ||||||||||||
1953 | 63.52 | 60.36 | 68.29 | 75.73 | 80.45 | 97.17 | 96.74 | 93.74 | 92.10 | 78.32 | 67.97 | 51.55 | 77.16 | |||||||||||||
1954 | 59.06 | 68.64 | 66.35 | 82.43 | 85.68 | 94.40 | 97.03 | 91.35 | 89.77 | 80.23 | 70.00 | 58.74 | 78.64 | |||||||||||||
1955 | 51.42 | 57.68 | 68.35 | e | 77.43 | 82.58 | 93.20 | 91.87 | 92.68 | 91.23 | 81.06 | 67.67 | 62.16 | 76.44 | ||||||||||||
1956 | 61.32 | 57.28 | 71.94 | 75.77 | 89.77 | 98.03 | 94.48 | 92.52 | 92.77 | 80.61 | 63.30 | 57.26 | 77.92 | |||||||||||||
1957 | 59.81 | 69.39 | 67.68 | 75.53 | 80.39 | 94.28 | a | 97.06 | 89.77 | 87.86 | a | 71.87 | 61.20 | 59.58 | 76.20 | |||||||||||
1958 | 54.45 | 63.75 | 60.32 | 73.97 | 86.45 | 97.90 | 97.87 | 95.00 | 84.07 | 73.19 | 65.23 | 63.13 | 76.28 | |||||||||||||
1959 | 60.13 | 61.00 | 68.35 | 78.27 | 85.94 | 96.60 | 96.03 | 91.16 | 90.13 | 79.90 | 63.67 | 55.35 | 77.21 | |||||||||||||
1960 | 52.13 | 57.24 | 73.29 | 79.67 | 85.26 | 97.67 | 92.77 | 95.74 | 89.37 | 76.16 | 67.93 | 46.00 | 76.10 | |||||||||||||
1961 | 52.61 | 63.46 | 68.52 | 78.10 | 87.65 | 95.90 | 96.10 | 91.81 | 82.93 | 78.97 | 57.70 | 56.16 | 75.83 | |||||||||||||
1962 | 52.10 | 66.61 | 62.94 | 79.93 | 85.71 | 93.73 | 92.32 | 96.16 | 85.83 | 78.13 | 68.90 | 56.68 | 76.59 | |||||||||||||
1963 | 53.42 | 64.00 | 68.65 | 78.97 | 89.35 | 94.60 | 98.74 | 91.87 | 88.33 | 81.94 | 67.67 | 57.61 | 77.93 | |||||||||||||
1964 | 53.03 | 55.07 | 64.81 | 74.70 | 86.58 | 93.47 | 96.16 | 94.61 | 85.80 | 80.06 | 66.40 | 56.77 | 75.62 | |||||||||||||
1965 | 58.58 | 60.21 | 64.55 | 77.13 | 84.23 | 90.33 | 97.10 | 93.71 | 85.13 | 79.97 | 70.63 | 55.48 | 76.42 | |||||||||||||
1966 | 51.55 | 54.79 | 70.32 | 78.23 | 87.87 | 93.80 | 97.68 | 92.29 | 87.30 | 77.19 | 69.83 | 57.84 | 76.56 | |||||||||||||
1967 | 59.03 | 64.00 | 74.58 | 78.50 | 83.81 | 90.97 | 96.13 | 90.13 | 83.87 | 79.77 | 67.93 | 49.58 | 76.52 | |||||||||||||
1968 | 54.77 | 62.93 | 64.26 | 72.80 | 85.07 | a | 96.20 | 93.32 | 90.77 | 87.53 | 81.71 | 65.87 | 53.84 | 75.76 | ||||||||||||
1969 | 61.81 | 61.68 | 63.29 | 80.20 | 86.23 | 94.13 | 95.13 | 96.94 | 87.37 | 77.06 | 63.10 | 57.71 | 77.05 | |||||||||||||
1970 | 57.10 | 61.50 | 63.48 | 74.40 | 85.90 | 92.53 | 95.32 | 93.16 | 86.13 | 70.39 | 67.80 | 60.90 | 75.72 | |||||||||||||
1971 | 59.65 | 63.32 | 71.27 | a | 74.47 | 83.65 | 94.83 | 97.26 | 91.29 | 88.28 | a | 72.42 | 63.93 | 53.90 | 76.19 | |||||||||||
1972 | 60.35 | 64.28 | 77.65 | 80.63 | 86.06 | 91.53 | 95.13 | 89.45 | 85.14 | i | 77.94 | 60.63 | 56.77 | 76.40 | a | |||||||||||
1973 | 50.68 | 55.18 | 63.32 | 71.10 | 83.16 | 92.43 | 92.77 | 93.03 | 89.20 | 80.61 | 70.50 | 60.35 | 75.20 | |||||||||||||
1974 | 57.39 | 60.71 | 74.55 | 77.73 | 88.35 | 97.77 | 91.06 | 88.61 | 82.97 | 73.55 | 64.07 | 50.35 | 75.59 | |||||||||||||
1975 | 51.84 | 59.46 | 66.29 | 71.67 | 81.90 | 94.37 | 91.42 | 93.55 | 82.10 | 77.68 | 66.73 | 55.61 | 74.39 | |||||||||||||
1976 | 56.19 | ----- | z | 68.52 | 75.50 | 82.87 | 94.13 | 92.29 | 93.29 | 84.60 | 71.74 | 60.63 | 54.29 | 75.82 | a | |||||||||||
1977 | 53.55 | 61.04 | 64.29 | 75.90 | a | 84.32 | 93.70 | 93.16 | 95.29 | 89.57 | 79.52 | 70.37 | 63.03 | 76.98 | ||||||||||||
1978 | ----- | z | 59.14 | 70.94 | 79.93 | 84.94 | 97.83 | 98.23 | 92.84 | 82.47 | 78.63 | a | 62.83 | a | 53.06 | 78.26 | a | |||||||||
1979 | 51.61 | 60.79 | 68.26 | ----- | z | 81.29 | 90.43 | 95.69 | b | 94.57 | a | 87.41 | a | 82.35 | 62.40 | 57.77 | 75.69 | a | ||||||||
1980 | 58.35 | 63.32 | a | 65.73 | a | 72.76 | a | 81.13 | 99.27 | 99.13 | a | 91.21 | g | 87.48 | e | 74.97 | b | 65.57 | b | 61.74 | 75.41 | a | ||||
1981 | 55.87 | a | 66.75 | 65.17 | b | 78.28 | a | ----- | z | 95.83 | 95.34 | b | 91.00 | 85.83 | 77.73 | a | 71.57 | 63.26 | 76.97 | a | ||||||
1982 | 58.06 | 61.04 | 69.60 | a | 76.87 | 81.48 | 93.60 | 96.14 | b | 93.00 | 86.72 | a | 75.48 | 61.77 | 53.33 | a | 75.59 | |||||||||
1983 | 54.10 | 60.75 | 66.53 | a | 68.53 | 83.74 | ----- | z | 96.94 | 94.03 | 90.50 | 76.97 | 67.70 | 59.47 | a | 74.48 | a | |||||||||
1984 | 57.10 | a | 62.52 | 70.23 | 77.43 | 91.97 | 90.86 | b | 93.26 | 88.29 | 87.20 | 69.70 | a | 67.23 | 56.06 | 75.99 | ||||||||||
1985 | 52.14 | c | 59.29 | 67.70 | d | 79.23 | d | 85.62 | b | 96.47 | 96.82 | c | 92.93 | a | 84.13 | ----- | z | ----- | z | 59.13 | 77.35 | b | ||||
1986 | 63.29 | 67.18 | 72.52 | 80.00 | c | 85.39 | 91.70 | 91.71 | 92.42 | 85.80 | 74.10 | 62.47 | 52.17 | a | 76.56 | |||||||||||
1987 | 54.90 | a | 60.00 | 65.26 | 73.83 | 82.03 | 92.80 | 95.39 | 91.00 | 85.23 | 80.65 | 65.03 | 52.85 | d | 74.91 | |||||||||||
1988 | 53.61 | 62.38 | 69.45 | 74.33 | 85.35 | 92.87 | 93.94 | 88.42 | 85.80 | 81.19 | 70.43 | 55.10 | 76.07 | |||||||||||||
1989 | 55.63 | d | 63.79 | 75.29 | 83.59 | a | 90.10 | a | 96.76 | a | 96.87 | a | 90.87 | 86.93 | 80.22 | d | 68.90 | a | 56.72 | b | 78.81 | |||||
1990 | 58.59 | b | 61.08 | b | 69.61 | 80.44 | c | 84.12 | g | 99.71 | f | 92.10 | a | 88.00 | b | 85.37 | c | 79.69 | e | 65.63 | 54.61 | 73.51 | b | |||
1991 | 55.28 | b | 63.58 | d | 66.08 | g | 76.17 | f | 80.44 | f | 94.07 | b | 91.27 | a | 90.57 | a | 83.50 | 80.35 | 63.36 | b | 54.34 | b | 75.15 | c | ||
1992 | 51.52 | b | 59.61 | a | 68.70 | a | 79.48 | c | 80.69 | b | 92.04 | d | 96.10 | 93.00 | a | 90.43 | b | 82.42 | 62.10 | 53.80 | f | 77.83 | a | |||
1993 | 57.90 | a | 61.57 | 69.90 | 78.89 | b | 86.23 | 90.10 | t | 96.09 | h | 92.79 | b | 87.90 | a | 77.26 | 65.07 | 57.84 | 73.53 | b | ||||||
1994 | 60.73 | a | 61.64 | 71.00 | 78.77 | 86.97 | 100.53 | 99.52 | 97.48 | 87.37 | 78.42 | 64.63 | 57.94 | 78.75 | ||||||||||||
1995 | 55.94 | 67.46 | 71.00 | 75.87 | 76.94 | 94.19 | d | 96.26 | 96.19 | 87.73 | 80.68 | 72.10 | 60.97 | 77.94 | ||||||||||||
1996 | 62.55 | 67.79 | 69.90 | 78.77 | 93.87 | 97.07 | 96.65 | 93.03 | 84.90 | 78.03 | a | 68.03 | a | 61.61 | 79.35 | |||||||||||
1997 | 56.06 | 61.46 | 73.06 | 73.53 | 88.29 | 95.03 | a | 97.32 | 93.32 | 90.24 | a | 78.30 | a | 67.27 | 53.10 | 77.25 | ||||||||||
1998 | 61.68 | 60.89 | a | 68.13 | a | 73.33 | 88.19 | 96.12 | e | 96.87 | a | 93.87 | 93.40 | 77.94 | 70.13 | 60.81 | 78.45 | |||||||||
1999 | 64.48 | 69.61 | 73.90 | 77.50 | 86.71 | 92.87 | 93.00 | a | 91.97 | 88.79 | a | 81.00 | 73.77 | 56.53 | a | 79.18 | ||||||||||
2000 | 65.29 | 69.31 | 69.87 | 82.17 | 93.03 | 94.60 | 97.63 | a | 95.17 | a | 93.67 | 75.68 | 59.17 | 60.16 | 79.65 | |||||||||||
2001 | 52.97 | 63.32 | 69.65 | 79.77 | 89.40 | a | 97.77 | 98.90 | 93.42 | 90.30 | ----- | z | 69.07 | 58.84 | 78.49 | a | ||||||||||
2002 | 60.77 | a | 62.25 | 71.97 | 84.97 | 90.06 | 101.24 | a | 96.77 | 98.35 | 90.10 | 76.87 | a | 65.87 | 55.52 | 79.56 | ||||||||||
2003 | 65.48 | 63.29 | g | 70.00 | b | 78.87 | 89.81 | 95.50 | 101.77 | 96.68 | 91.97 | 84.00 | 67.76 | a | 60.87 | 82.06 | a | |||||||||
2004 | 57.55 | 60.11 | a | 72.77 | 75.63 | 88.39 | 95.97 | a | 94.38 | r | 92.45 | 87.83 | 77.81 | 61.27 | 55.58 | 75.03 | a | |||||||||
2005 | 60.03 | b | 57.25 | 66.13 | 76.30 | 86.81 | 96.27 | 101.58 | 93.81 | 92.57 | 78.74 | 71.53 | 63.74 | 78.73 | ||||||||||||
2006 | 63.06 | 66.75 | 70.61 | 82.97 | 92.29 | 97.96 | b | 96.97 | a | 90.13 | 83.10 | 76.55 | 71.80 | 57.29 | 79.12 | |||||||||||
2007 | 52.00 | 64.79 | 73.16 | 79.37 | 85.03 | 97.67 | 97.61 | 96.26 | 91.13 | 85.80 | u | 71.93 | 58.03 | 78.82 | a | |||||||||||
2008 | 57.35 | 66.83 | 72.83 | b | 78.93 | 85.59 | b | 99.03 | 91.68 | 93.48 | 85.97 | a | 80.94 | 69.31 | a | 61.39 | 78.61 | |||||||||
2009 | 63.87 | 68.54 | 73.87 | a | 78.17 | 90.68 | 93.11 | b | 99.97 | a | 96.74 | 86.55 | a | 79.29 | 69.87 | 54.48 | 79.59 | |||||||||
2010 | 54.71 | 60.25 | 67.10 | 78.30 | 86.61 | 99.43 | 95.55 | 95.00 | 93.13 | 82.81 | 68.57 | 65.55 | 78.92 | |||||||||||||
2011 | 60.10 | 61.57 | 78.06 | 83.03 | 86.55 | 100.93 | 100.00 | a | 99.32 | 92.17 | 81.90 | 66.07 | 49.19 | 79.91 | ||||||||||||
2012 | 63.58 | 64.69 | 74.13 | 83.83 | 89.90 | 101.13 | 97.10 | 96.45 | 88.27 | 79.61 | 72.37 | ----- | z | 82.82 | a | |||||||||||
2013 | 55.06 | 61.75 | 74.32 | 79.70 | 87.61 | 101.37 | ----- | z | 93.77 | 86.53 | 79.17 | a | 67.41 | c | 58.68 | c | 76.85 | a | ||||||||
2014 | 64.31 | b | 70.25 | 73.55 | 79.43 | 85.10 | 100.00 | 97.48 | 91.23 | 86.53 | 81.80 | a | 68.43 | 62.10 | 80.02 | |||||||||||
2015 | 55.03 | 68.93 | 72.58 | 77.93 | 84.35 | 97.10 | 95.39 | 97.55 | 91.07 | 78.42 | 66.03 | 56.10 | 78.37 | |||||||||||||
2016 | 57.71 | 69.59 | 75.68 | 77.47 | 84.32 | 97.80 | 100.42 | 90.55 | 87.27 | 84.13 | 66.97 | 60.10 | 79.33 | |||||||||||||
2017 | 58.29 | 68.29 | 77.13 | 81.53 | 86.23 | 98.23 | 95.00 | 90.84 | 87.90 | 81.16 | 75.50 | 61.65 | 80.15 | |||||||||||||
2018 | 61.06 | 65.11 | 71.87 | 81.63 | 90.87 | 98.27 | 94.77 | 95.13 | 89.23 | 71.71 | 64.40 | 55.71 | 78.31 | |||||||||||||
2019 | 56.35 | 59.64 | 70.61 | 78.80 | 82.58 | 93.47 | 98.16 | 97.16 | 88.80 | 75.81 | 64.30 | 54.10 | 76.65 | |||||||||||||
2020 | 59.32 | 60.54 | a | 66.90 | 77.63 | 88.84 | 94.20 | 98.06 | 98.32 | 87.63 | 83.71 | 71.20 | 57.58 | 78.66 | ||||||||||||
2021 | 57.61 | 63.18 | 67.26 | 78.67 | 86.74 | 95.90 | 92.65 | 90.58 | 89.33 | 78.77 | 70.80 | 63.77 | 77.94 | |||||||||||||
2022 | 58.16 | 59.61 | 69.10 | 82.33 | 90.60 | p | 95.63 | 97.77 | 90.47 | a | 88.60 | 71.84 | 62.97 | 56.81 | 75.75 | a | ||||||||||
2023 | 57.42 | 58.75 | 68.48 | 79.13 | 86.68 | 94.97 | 103.26 | 95.87 | 91.70 | 80.61 | 67.70 | 59.45 | 78.67 | |||||||||||||
2024 | 57.65 | 64.17 | 67.61 | 73.00 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.14 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.05 | 62.53 | 69.33 | 77.91 | 86.25 | 95.54 | 96.07 | 93.44 | 87.95 | 78.38 | 66.55 | 57.50 | 77.45 | |||||||||||||
S.D. | 4.03 | 3.80 | 3.74 | 3.19 | 3.02 | 2.64 | 2.59 | 2.52 | 2.78 | 3.24 | 3.78 | 3.75 | 1.46 | |||||||||||||
SKEW | -0.05 | 0.01 | 0.04 | -0.19 | -0.16 | 0.27 | 0.08 | 0.01 | 0.01 | -0.55 | -0.02 | -0.21 | 0.10 | |||||||||||||
MAX | 65.48 | 70.25 | 78.06 | 84.97 | 93.87 | 101.37 | 103.26 | 99.32 | 93.67 | 85.10 | 75.50 | 65.93 | 80.15 | |||||||||||||
MIN | 44.55 | 53.18 | 60.32 | 68.53 | 76.94 | 90.33 | 91.06 | 88.00 | 82.10 | 69.70 | 57.70 | 46.00 | 74.39 | |||||||||||||
YRS | 87 | 86 | 86 | 85 | 83 | 84 | 84 | 86 | 87 | 85 | 87 | 86 | 67 |