YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | 55.86 | i | 60.29 | 75.33 | j | 78.70 | 89.50 | m | 99.26 | k | 96.05 | l | 95.45 | 93.31 | a | 79.97 | a | 67.00 | 63.16 | 76.84 | e | |||||
1940 | 53.97 | 63.14 | a | 71.47 | a | 80.34 | a | 88.42 | 94.48 | a | 97.86 | b | 95.35 | 90.60 | 79.97 | 62.17 | 62.10 | b | 78.32 | |||||||
1941 | 56.55 | 64.26 | a | 65.45 | 72.55 | a | 86.16 | 92.63 | 95.10 | 93.16 | 86.73 | 75.48 | 65.17 | 58.10 | 75.95 | |||||||||||
1942 | 57.52 | 60.71 | 68.27 | a | 76.60 | 87.10 | 98.50 | 99.77 | 92.58 | 87.23 | 77.26 | 72.83 | 62.26 | 78.39 | ||||||||||||
1943 | 58.87 | 68.70 | a | 72.27 | a | 85.47 | 89.94 | 95.07 | 96.55 | 100.13 | 89.50 | 78.87 | 68.57 | b | 55.81 | 79.98 | ||||||||||
1944 | 55.39 | 62.48 | b | 69.35 | 78.03 | 86.68 | 95.50 | 98.42 | 95.68 | 88.37 | 80.87 | 64.77 | 59.40 | a | 77.91 | |||||||||||
1945 | 59.13 | 68.48 | a | 72.00 | 80.21 | b | 90.32 | 95.90 | 97.35 | 97.94 | 93.93 | a | 78.83 | a | 71.40 | 59.16 | 80.39 | |||||||||
1946 | 53.97 | 66.89 | 71.97 | a | 83.83 | 86.26 | 97.77 | 96.19 | 94.71 | 89.53 | 78.71 | 62.97 | a | 58.71 | 78.46 | |||||||||||
1947 | 51.84 | 63.25 | 69.94 | 76.62 | a | 89.61 | 96.87 | 97.87 | 93.77 | 91.83 | ----- | z | ----- | z | 54.04 | e | 78.56 | b | ||||||||
1948 | 52.04 | h | 61.97 | 65.42 | 82.77 | 88.97 | 95.60 | 97.77 | 96.32 | 89.60 | 75.77 | a | 62.50 | 58.77 | 79.59 | a | ||||||||||
1949 | 46.68 | 60.50 | 71.13 | 76.70 | 87.61 | 95.03 | 95.35 | 93.52 | 87.30 | 75.13 | a | 70.00 | 55.13 | 76.17 | ||||||||||||
1950 | 61.13 | 67.73 | b | 72.68 | 81.63 | 87.03 | 98.10 | 94.55 | 95.77 | 88.07 | 84.90 | 70.03 | 63.45 | 80.42 | ||||||||||||
1951 | 58.16 | 61.54 | 69.20 | a | 78.73 | 89.42 | 96.93 | 101.77 | 97.29 | 94.70 | 81.26 | 64.82 | b | 58.00 | 79.32 | |||||||||||
1952 | 62.74 | 60.41 | 65.16 | 77.00 | a | 88.18 | c | 97.43 | b | 96.82 | c | 98.69 | b | 91.86 | b | 84.12 | g | 67.70 | g | 56.87 | 79.52 | b | ||||
1953 | 65.25 | g | 61.09 | f | 72.42 | g | 78.68 | b | 84.19 | 100.28 | e | 97.80 | a | 96.32 | 93.03 | 78.94 | 67.15 | c | 52.06 | 83.16 | c | |||||
1954 | 60.55 | 69.57 | 69.00 | a | 83.93 | 87.94 | 96.17 | f | 99.26 | 93.52 | 91.13 | 80.32 | 68.23 | 59.45 | 78.45 | a | ||||||||||
1955 | 51.29 | 59.19 | a | 70.77 | 79.10 | a | 86.19 | 94.47 | 92.87 | 93.55 | 93.60 | j | 81.05 | l | 67.90 | 61.87 | 75.72 | b | ||||||||
1956 | 62.48 | 61.03 | 74.65 | 77.87 | 92.13 | 99.60 | 96.71 | 94.74 | 94.48 | a | 82.53 | a | 64.67 | 56.90 | 79.82 | |||||||||||
1957 | 62.03 | 71.79 | 70.32 | 77.90 | 84.13 | 96.66 | a | 98.13 | a | 93.43 | a | 89.47 | 72.32 | 59.62 | a | 58.87 | 77.89 | |||||||||
1958 | 52.94 | 64.32 | 62.06 | 76.77 | 89.55 | 99.21 | b | 100.60 | a | 98.11 | d | 87.43 | 73.19 | 66.77 | 61.48 | 77.70 | ||||||||||
1959 | 62.27 | a | 62.89 | 71.10 | 80.50 | 88.07 | a | 98.47 | 98.35 | 94.42 | 92.40 | 80.19 | 64.57 | 57.35 | 79.21 | |||||||||||
1960 | 53.03 | 58.18 | a | 74.42 | 81.47 | 87.87 | 100.03 | 94.00 | 95.94 | 91.43 | 77.81 | 67.67 | 46.58 | 77.37 | ||||||||||||
1961 | 53.00 | 63.64 | 70.55 | 80.03 | 90.48 | 97.43 | 97.80 | a | 94.58 | 87.33 | 82.03 | b | 62.40 | 57.87 | 78.10 | |||||||||||
1962 | 53.61 | 67.50 | 64.97 | 81.67 | 90.47 | a | 95.93 | 93.00 | 98.19 | 86.43 | 78.43 | a | 68.14 | b | 57.45 | 77.98 | ||||||||||
1963 | 54.90 | 65.11 | 71.74 | 81.53 | 91.40 | a | 97.43 | b | 99.97 | 92.67 | d | 89.70 | 82.68 | 72.73 | o | 56.63 | a | 80.34 | a | |||||||
1964 | 53.81 | 54.81 | c | 67.75 | k | 77.28 | e | 88.71 | c | 96.08 | d | 97.50 | a | 96.10 | b | 89.10 | a | 82.21 | b | 67.50 | 56.00 | a | 78.10 | a | ||
1965 | 59.77 | 59.86 | 65.81 | 79.53 | 87.10 | 93.87 | 98.55 | 94.35 | 86.70 | 80.00 | c | 70.50 | 56.90 | 77.75 | ||||||||||||
1966 | 52.13 | 55.85 | b | 72.06 | 79.83 | 88.65 | 93.10 | 98.71 | 92.23 | a | 87.70 | 78.45 | 70.03 | 57.52 | 77.19 | |||||||||||
1967 | 58.39 | 64.71 | 76.32 | 81.53 | 86.61 | 93.90 | a | 97.65 | 92.35 | 87.40 | 80.67 | a | 66.80 | 50.48 | 78.07 | |||||||||||
1968 | 53.94 | 63.52 | d | 66.16 | 75.37 | 88.21 | c | 97.87 | 94.10 | 92.30 | a | 89.48 | a | 82.80 | a | 65.47 | 56.68 | 77.16 | ||||||||
1969 | 63.39 | 63.00 | 68.00 | a | 82.97 | 90.06 | 96.77 | 98.00 | 98.26 | 88.40 | 78.61 | 64.40 | 58.77 | 79.22 | ||||||||||||
1970 | 58.71 | 64.04 | 66.94 | 78.52 | a | 89.58 | 95.30 | 97.74 | 95.61 | 90.00 | 75.10 | b | 68.29 | b | 62.13 | 78.50 | ||||||||||
1971 | 60.39 | 63.71 | 73.43 | a | 77.59 | a | 87.13 | a | 97.41 | a | 98.10 | 91.77 | a | 89.97 | 76.20 | a | 64.23 | 55.55 | 77.96 | |||||||
1972 | 59.94 | 66.36 | a | 78.03 | 83.30 | 87.94 | 94.37 | 97.53 | a | 92.23 | 86.34 | a | 78.94 | 60.17 | 56.55 | 78.47 | ||||||||||
1973 | 52.48 | 57.25 | 66.47 | a | 74.38 | a | 86.35 | 95.13 | 95.97 | 96.03 | 91.73 | 82.65 | 71.17 | 60.19 | 77.48 | |||||||||||
1974 | 59.81 | 64.04 | 77.87 | 81.23 | 92.43 | a | 99.83 | 94.97 | 91.16 | 86.17 | 76.73 | a | 64.10 | 53.41 | b | 78.48 | ||||||||||
1975 | 56.67 | a | 62.25 | 70.45 | 76.53 | 86.29 | 97.86 | a | 94.23 | 95.63 | a | 87.30 | 81.07 | b | 67.62 | a | 58.58 | 77.87 | ||||||||
1976 | 57.69 | e | 68.14 | 71.68 | 79.67 | 85.19 | 96.60 | 95.65 | n | 94.36 | f | 86.67 | 72.33 | a | 58.33 | 53.06 | 72.94 | b | ||||||||
1977 | 55.03 | 62.79 | 66.68 | 77.87 | 87.42 | 97.21 | a | 96.65 | 97.77 | 92.97 | 80.29 | 69.80 | 62.58 | 78.92 | ||||||||||||
1978 | 56.93 | a | 59.64 | 72.58 | 81.77 | 87.74 | 99.93 | 101.00 | 95.03 | a | 84.66 | a | 80.21 | b | 64.53 | 54.39 | 78.20 | |||||||||
1979 | 52.26 | 62.32 | 69.87 | 79.97 | 85.40 | a | 94.73 | 99.19 | 91.61 | 89.28 | a | 84.10 | 62.60 | j | 57.30 | a | 78.73 | a | ||||||||
1980 | 60.00 | a | 63.89 | a | 69.52 | 78.53 | 85.23 | 101.27 | 100.55 | 94.35 | 88.17 | 74.94 | 64.90 | 62.39 | 78.64 | |||||||||||
1981 | 57.23 | 65.96 | 68.35 | 82.72 | a | 87.29 | 100.11 | b | 98.60 | a | 91.87 | 87.77 | 77.90 | 70.27 | 62.55 | 79.22 | ||||||||||
1982 | 60.24 | b | 64.00 | 72.40 | a | 79.47 | 86.23 | a | 98.50 | b | 98.84 | 96.71 | 88.79 | a | 78.77 | a | 62.39 | b | 52.42 | 78.23 | ||||||
1983 | 53.45 | 62.39 | 69.79 | c | 70.69 | a | 85.48 | 96.30 | 98.71 | 96.74 | 91.83 | 78.13 | 65.00 | 56.61 | 77.09 | |||||||||||
1984 | 57.55 | 62.90 | 72.10 | 78.80 | 91.55 | 92.43 | 96.06 | 90.42 | 89.37 | 68.93 | a | 62.83 | 55.86 | b | 76.57 | |||||||||||
1985 | 52.35 | 61.71 | 70.58 | 81.83 | 88.87 | 96.67 | 96.97 | 95.13 | 87.63 | 75.71 | 66.97 | 58.68 | 77.76 | |||||||||||||
1986 | 62.42 | 65.93 | 72.52 | 82.47 | 88.35 | 92.63 | 94.58 | 94.42 | 87.83 | 75.65 | 61.60 | 52.45 | 77.57 | |||||||||||||
1987 | 55.97 | 60.43 | 67.14 | b | 77.33 | 84.58 | 94.17 | 97.29 | 93.00 | 86.87 | 82.23 | 65.57 | 53.37 | a | 76.49 | |||||||||||
1988 | 54.39 | 63.83 | 72.84 | 80.53 | 87.26 | 94.50 | 94.10 | 88.77 | 86.93 | 81.58 | 69.33 | 54.23 | 77.36 | |||||||||||||
1989 | 57.48 | 63.93 | 76.19 | 85.90 | 90.85 | d | 97.07 | 95.81 | 92.30 | d | 88.30 | 80.71 | 68.20 | 56.45 | 79.43 | |||||||||||
1990 | 58.46 | c | 62.68 | 70.73 | a | 81.00 | a | 87.07 | b | 101.90 | a | 93.30 | a | 90.37 | a | 86.90 | 78.46 | c | 66.53 | 57.00 | 77.87 | |||||
1991 | ----- | z | 63.50 | 67.41 | b | 78.87 | 89.03 | 94.73 | 92.16 | 91.00 | 82.90 | 81.90 | a | 60.27 | 52.87 | 77.69 | a | |||||||||
1992 | 49.77 | 60.00 | 69.87 | a | 80.27 | 82.13 | a | 93.30 | 96.55 | 94.77 | 91.27 | 81.74 | 61.70 | 52.23 | a | 76.13 | ||||||||||
1993 | 55.58 | 62.32 | 70.70 | a | 79.23 | 86.40 | a | 97.00 | 97.17 | a | 93.94 | 89.10 | 79.03 | 64.47 | 58.13 | a | 77.76 | |||||||||
1994 | 60.65 | 61.54 | 71.48 | b | 79.41 | a | 87.68 | 101.60 | 100.00 | 98.16 | 89.53 | 78.74 | 64.73 | 59.00 | d | 79.38 | ||||||||||
1995 | 56.90 | b | 67.75 | 70.97 | 75.14 | a | 86.77 | 95.30 | 97.87 | 96.65 | 87.50 | 82.32 | 70.30 | 61.56 | d | 79.09 | ||||||||||
1996 | 59.71 | 67.93 | 68.87 | 79.13 | 95.32 | 98.03 | 95.26 | 92.90 | 85.43 | 78.06 | 67.83 | 59.00 | 78.96 | |||||||||||||
1997 | 54.03 | 60.96 | 73.03 | 74.20 | 87.83 | b | 95.10 | a | 96.65 | 94.74 | 91.60 | 78.87 | 65.60 | 51.00 | a | 76.97 | ||||||||||
1998 | 59.58 | 59.59 | a | 68.29 | 74.43 | 89.39 | 96.93 | 97.17 | a | 95.50 | a | 94.47 | 78.16 | 68.73 | 57.73 | a | 78.33 | |||||||||
1999 | 62.23 | 67.61 | 71.90 | 77.40 | 88.17 | a | 93.90 | 95.39 | 94.71 | 87.48 | a | 79.87 | 72.52 | a | 55.90 | a | 78.92 | |||||||||
2000 | 63.06 | 68.21 | 70.42 | 82.55 | a | 93.13 | a | 94.17 | 98.16 | 94.97 | 93.77 | 76.77 | 58.43 | 56.67 | a | 79.19 | ||||||||||
2001 | 53.35 | 63.21 | 68.48 | 80.73 | 89.94 | 96.80 | 99.19 | 94.94 | 89.93 | 81.39 | 67.57 | 56.90 | a | 78.54 | ||||||||||||
2002 | 58.26 | 58.79 | 70.55 | 84.10 | 89.23 | 101.33 | 95.90 | 97.50 | a | 90.00 | 75.52 | 63.67 | 53.76 | b | 78.22 | |||||||||||
2003 | 62.39 | 61.54 | 68.35 | 78.93 | 89.94 | 96.20 | 100.21 | b | 96.77 | 90.73 | 82.65 | 67.47 | 58.13 | 79.44 | ||||||||||||
2004 | 57.81 | 58.45 | 71.74 | 75.03 | 88.80 | a | 95.66 | a | 96.41 | b | 92.61 | 87.00 | c | 76.00 | b | 60.86 | a | 55.13 | h | 78.22 | a | |||||
2005 | 60.26 | 57.75 | 67.16 | 77.77 | 87.87 | 97.57 | 100.35 | 92.16 | 92.80 | 76.90 | 70.07 | 61.07 | a | 78.48 | ||||||||||||
2006 | 61.81 | 64.68 | 71.16 | 83.67 | 92.35 | 98.53 | 96.97 | 88.48 | 81.67 | 74.74 | 69.93 | 55.26 | 78.27 | |||||||||||||
2007 | 50.45 | 63.39 | 72.71 | 78.97 | a | 85.52 | 96.80 | 96.00 | a | 96.94 | 90.47 | 82.29 | 69.37 | 56.97 | 78.32 | |||||||||||
2008 | 55.93 | a | 64.79 | 71.00 | 79.27 | 86.84 | 99.30 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.19 | f | |||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 98.10 | a | 97.00 | 86.47 | 77.89 | c | 70.00 | 54.68 | 80.69 | f | ||||
2010 | 56.07 | a | 59.07 | a | 69.29 | 78.17 | 87.26 | 99.83 | 95.84 | 96.90 | 91.83 | 81.57 | a | 69.04 | c | 63.32 | 79.02 | |||||||||
2011 | 57.81 | 63.96 | d | 76.61 | 82.73 | 86.87 | 101.50 | 99.71 | 99.10 | 92.53 | 81.19 | 65.30 | 48.43 | c | 79.65 | |||||||||||
2012 | 60.55 | 62.24 | 73.84 | 85.30 | 88.55 | 101.03 | 96.45 | 98.26 | 88.90 | 82.23 | 71.63 | 59.65 | 80.72 | |||||||||||||
2013 | 53.87 | 60.89 | 74.03 | b | 80.30 | 88.23 | 100.90 | 94.61 | 95.87 | a | 87.07 | 78.43 | a | 65.21 | b | 56.13 | 77.96 | |||||||||
2014 | 59.35 | 70.14 | f | 73.06 | 79.63 | 87.21 | b | 101.63 | 98.68 | 92.06 | 85.75 | b | 82.07 | a | 66.03 | a | 60.74 | 80.57 | a | |||||||
2015 | 53.00 | 66.11 | a | 72.42 | 77.81 | c | 86.13 | 98.63 | 99.61 | 100.70 | a | 94.46 | b | 81.93 | b | 65.40 | 56.73 | a | 79.41 | |||||||
2016 | 53.71 | 67.48 | 75.70 | a | 79.17 | 85.75 | c | 97.70 | 101.45 | b | 92.34 | b | 88.83 | a | 84.23 | 69.03 | 58.13 | 79.46 | ||||||||
2017 | 58.64 | c | 67.79 | 77.23 | 81.47 | 86.70 | a | 98.39 | b | 96.73 | a | 91.90 | 90.45 | a | 81.37 | a | 73.17 | 59.19 | 80.25 | |||||||
2018 | 58.07 | a | 65.54 | 73.00 | e | 82.03 | a | 92.52 | b | 100.27 | 97.17 | b | 95.84 | 90.28 | a | 74.16 | 65.47 | 59.33 | y | 81.30 | a | |||||
2019 | 63.33 | y | 62.70 | a | 71.13 | 78.00 | 85.07 | a | 95.28 | a | 98.87 | 99.42 | g | 91.50 | 76.52 | 65.03 | 56.57 | a | 78.07 | b | ||||||
2020 | 57.73 | a | 59.92 | c | 70.61 | ----- | z | 92.22 | d | 100.00 | o | 100.63 | a | ----- | z | 88.59 | c | 84.58 | 72.43 | b | 57.41 | b | 76.02 | c | ||
2021 | 56.30 | a | 62.63 | a | 71.10 | b | 78.21 | b | 89.29 | 99.07 | a | 93.10 | a | 92.70 | a | 91.00 | 79.68 | 71.13 | 65.25 | c | 79.12 | |||||
2022 | 58.70 | a | 60.96 | a | 68.43 | a | 82.85 | c | 92.82 | c | 95.76 | a | 99.00 | b | 92.35 | e | 88.77 | 74.57 | c | 63.09 | h | 59.57 | a | 79.43 | a | |
2023 | 59.93 | a | 62.76 | c | 69.41 | b | 80.00 | a | 89.48 | b | 98.38 | a | 104.82 | c | 99.62 | b | 93.64 | b | 83.52 | b | 68.00 | c | 59.97 | b | 80.79 | |
2024 | 56.97 | 65.61 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.29 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.07 | 63.17 | 70.72 | 79.52 | 88.19 | 97.10 | 97.38 | 94.74 | 89.34 | 79.11 | 66.53 | 57.38 | 78.42 | |||||||||||||
S.D. | 3.60 | 3.24 | 3.09 | 2.89 | 2.33 | 2.42 | 2.29 | 2.57 | 2.68 | 3.16 | 3.47 | 3.50 | 1.10 | |||||||||||||
SKEW | -0.31 | 0.06 | 0.01 | -0.26 | 0.44 | 0.15 | 0.14 | -0.00 | -0.02 | -0.57 | -0.27 | -0.39 | -0.03 | |||||||||||||
MAX | 63.39 | 71.79 | 78.03 | 85.90 | 95.32 | 101.90 | 104.82 | 100.70 | 94.70 | 84.90 | 73.17 | 65.25 | 80.79 | |||||||||||||
MIN | 46.68 | 54.81 | 62.06 | 70.69 | 82.13 | 92.43 | 92.16 | 88.48 | 81.67 | 68.93 | 58.33 | 46.58 | 75.95 | |||||||||||||
YRS | 80 | 83 | 81 | 83 | 83 | 81 | 82 | 81 | 83 | 81 | 79 | 82 | 65 |