YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | 84.50 | k | 90.40 | 96.47 | l | 88.90 | 90.10 | 79.81 | 59.37 | 54.65 | 77.20 | f | ||||||
1948 | 57.06 | 57.72 | 60.19 | 78.83 | 86.03 | 92.20 | 94.55 | 94.06 | 87.87 | 75.19 | 60.67 | 54.90 | 74.94 | |||||||||||||
1949 | 44.00 | a | 56.50 | 66.06 | 73.83 | 82.81 | 89.70 | 91.52 | 90.45 | 85.33 | 72.29 | 70.73 | 53.94 | 73.10 | ||||||||||||
1950 | 56.58 | 63.07 | 67.39 | 76.63 | 82.58 | 89.37 | 89.87 | 93.00 | 85.23 | 83.71 | 71.80 | 64.77 | 77.00 | |||||||||||||
1951 | 56.68 | 59.68 | 64.74 | 71.80 | 84.13 | 92.47 | 96.97 | 91.97 | 91.73 | 77.81 | 63.33 | 54.52 | 75.48 | |||||||||||||
1952 | 57.03 | 57.66 | 59.10 | 72.30 | 83.55 | 91.93 | 93.71 | 93.84 | 89.20 | 82.48 | 61.63 | 53.52 | 74.66 | |||||||||||||
1953 | 61.45 | 59.50 | 66.13 | 72.83 | 78.06 | 94.63 | 93.45 | 92.68 | 91.00 | 77.42 | 68.20 | 54.55 | 75.83 | |||||||||||||
1954 | 59.00 | 67.11 | 63.71 | 80.80 | 84.81 | 92.70 | 94.03 | 88.48 | 88.80 | 80.48 | 70.03 | 59.73 | a | 77.47 | ||||||||||||
1955 | 51.19 | 58.11 | 66.42 | 74.21 | a | 80.93 | a | 91.57 | 89.90 | 88.10 | 89.53 | 80.58 | 66.07 | 61.10 | 74.81 | |||||||||||
1956 | 59.87 | 54.28 | 70.13 | 72.70 | 86.81 | 95.40 | 92.39 | 90.55 | 92.00 | 78.68 | 63.07 | 55.10 | 75.91 | |||||||||||||
1957 | 55.39 | 67.46 | 64.32 | 72.45 | a | 77.71 | 92.97 | 94.13 | 85.94 | 86.83 | 69.55 | 59.20 | 59.40 | a | 73.78 | |||||||||||
1958 | 54.16 | 60.82 | 56.58 | 72.03 | 86.35 | 95.77 | 96.16 | 92.10 | 83.73 | 72.61 | 64.70 | 63.39 | 74.87 | |||||||||||||
1959 | 61.03 | 59.71 | 68.03 | 77.37 | 83.19 | 95.17 | 93.74 | 88.48 | 87.90 | 78.94 | 63.90 | a | 55.61 | 76.09 | ||||||||||||
1960 | 48.68 | 55.10 | 70.94 | 76.90 | 83.61 | 96.57 | 93.06 | 94.06 | 89.37 | 74.61 | 68.07 | 53.13 | a | 75.34 | ||||||||||||
1961 | 54.93 | b | 61.64 | 66.16 | 76.77 | 84.94 | 94.10 | 94.58 | 90.81 | 83.70 | 76.45 | 58.67 | 53.97 | 74.73 | ||||||||||||
1962 | 51.65 | 62.57 | 60.45 | 78.37 | 82.71 | 91.60 | 90.06 | 94.61 | 85.63 | 77.32 | 67.70 | 54.81 | 74.79 | |||||||||||||
1963 | 52.87 | 63.54 | 67.06 | 74.73 | 86.68 | 91.77 | 95.06 | 86.42 | 86.80 | 79.68 | 65.47 | 56.97 | 75.59 | |||||||||||||
1964 | 53.03 | 55.38 | 62.45 | 71.43 | 83.81 | 90.60 | 94.03 | 91.52 | 82.53 | 79.03 | 63.57 | 54.90 | 73.52 | |||||||||||||
1965 | 57.90 | 58.64 | 62.68 | 73.73 | 80.58 | 88.60 | 93.58 | 91.00 | 82.47 | 79.81 | 67.33 | 53.77 | 74.17 | |||||||||||||
1966 | 50.84 | 53.00 | 68.58 | 75.83 | 85.23 | 91.40 | 95.48 | 89.19 | 83.93 | 76.19 | 67.90 | 56.16 | 74.48 | |||||||||||||
1967 | 59.06 | 63.75 | 71.68 | 74.10 | 81.23 | 89.70 | 93.97 | 88.94 | 83.07 | 78.97 | 67.30 | 48.55 | 75.03 | |||||||||||||
1968 | 55.42 | 62.21 | 62.90 | 69.43 | 82.35 | 93.47 | 90.94 | 86.32 | 85.70 | 80.77 | 63.47 | 55.48 | 74.04 | |||||||||||||
1969 | 59.07 | a | 58.86 | 63.23 | 77.20 | 85.06 | 91.70 | 92.10 | 93.06 | 86.77 | 74.97 | 63.33 | 56.45 | 75.15 | ||||||||||||
1970 | 54.87 | 61.71 | 62.61 | 70.57 | 84.32 | 91.83 | 93.65 | 92.19 | 85.57 | 71.61 | 66.90 | 59.45 | 74.61 | |||||||||||||
1971 | 57.65 | 60.36 | 70.39 | 73.20 | 80.97 | 93.07 | 95.48 | 88.55 | 86.40 | 71.45 | 63.77 | 52.13 | 74.45 | |||||||||||||
1972 | 59.16 | 63.83 | 75.42 | 77.73 | 82.65 | 90.57 | 94.16 | 88.81 | 84.00 | 73.19 | 59.23 | 56.23 | 75.41 | |||||||||||||
1973 | 51.19 | 54.96 | 59.42 | 68.77 | 81.52 | 91.57 | 91.87 | 92.23 | 88.77 | 79.90 | 67.57 | 59.39 | 73.93 | |||||||||||||
1974 | 57.48 | 61.07 | 70.35 | 75.53 | 86.13 | 97.30 | 90.97 | 88.65 | 83.70 | 72.52 | 64.17 | 53.71 | 75.13 | |||||||||||||
1975 | 55.39 | 57.93 | 63.94 | 69.13 | 80.13 | 92.33 | 89.81 | 92.19 | 81.03 | 76.81 | 65.90 | 57.13 | 73.48 | |||||||||||||
1976 | 56.42 | 62.90 | 66.13 | 73.00 | 81.65 | 92.37 | 90.00 | 91.35 | 82.77 | 71.06 | 63.20 | 56.45 | 73.94 | |||||||||||||
1977 | 52.48 | 62.21 | ----- | z | 74.60 | 80.87 | 92.57 | 92.68 | 92.52 | 86.93 | 77.77 | 68.80 | 60.87 | 76.57 | a | |||||||||||
1978 | 54.87 | 56.93 | 66.71 | 75.43 | 83.32 | 95.63 | 97.68 | 90.52 | 83.47 | 78.32 | 63.27 | 51.13 | 74.77 | |||||||||||||
1979 | 49.10 | 58.54 | 64.19 | 74.73 | 80.00 | 88.67 | 95.48 | 89.13 | 87.03 | 82.10 | 62.50 | 60.65 | 74.34 | |||||||||||||
1980 | 57.06 | 60.66 | 62.68 | 73.43 | 80.42 | 98.20 | 97.35 | 90.97 | 87.20 | 74.61 | 65.97 | 64.32 | 76.07 | |||||||||||||
1981 | 58.48 | 64.93 | 63.77 | 78.23 | 82.94 | 95.63 | 92.45 | 89.71 | 87.07 | 75.93 | a | 69.67 | 62.42 | 76.77 | ||||||||||||
1982 | 56.23 | a | 60.63 | a | 65.80 | a | 74.83 | 81.71 | 93.13 | 94.00 | 91.32 | 86.33 | 77.43 | a | 61.29 | b | 52.34 | b | 74.59 | |||||||
1983 | 57.48 | 58.75 | 62.30 | a | 66.62 | f | 82.71 | c | 91.14 | a | 93.70 | a | 90.58 | 87.37 | 74.42 | 62.13 | 55.48 | 74.19 | a | |||||||
1984 | 57.06 | 60.93 | 68.13 | 73.13 | 88.97 | 90.20 | 90.77 | 86.60 | a | 87.97 | 70.39 | 65.97 | 57.42 | 74.79 | ||||||||||||
1985 | 52.68 | 61.48 | a | 68.53 | a | 78.67 | 84.71 | 96.57 | 96.52 | 93.52 | 84.43 | 73.97 | 64.77 | 59.16 | 76.25 | |||||||||||
1986 | 65.42 | 63.32 | 70.45 | 79.00 | 86.90 | 92.27 | 90.87 | 91.23 | 84.93 | 73.74 | 58.69 | a | 49.54 | e | 75.53 | |||||||||||
1987 | 54.50 | a | 56.74 | a | 62.20 | a | 73.80 | 78.06 | 89.77 | 90.00 | a | 85.35 | 81.03 | 77.34 | b | 62.13 | 51.37 | a | 71.86 | |||||||
1988 | 53.10 | a | 60.85 | b | 65.26 | 70.20 | 80.29 | 89.37 | 88.33 | d | 83.59 | b | 81.00 | b | 76.97 | 64.83 | a | 53.63 | a | 72.28 | ||||||
1989 | 53.87 | a | 62.90 | g | 71.94 | 81.13 | 84.58 | 91.63 | 92.68 | 87.87 | a | 85.43 | 74.81 | 66.62 | a | 55.47 | a | 76.91 | a | |||||||
1990 | 55.97 | 57.00 | 65.23 | 74.90 | 79.71 | 95.34 | a | 87.03 | 85.17 | a | 84.77 | 76.50 | a | 63.40 | 49.32 | 72.86 | ||||||||||
1991 | 52.59 | b | 62.07 | a | 60.00 | a | 71.57 | 80.21 | c | 86.27 | 87.77 | a | 85.42 | 80.55 | a | 77.32 | 61.07 | 50.50 | k | 73.17 | a | |||||
1992 | 50.71 | 57.83 | 63.39 | 74.87 | 75.65 | 86.70 | 90.87 | 87.37 | a | 86.43 | 77.30 | a | 59.27 | 51.48 | 71.82 | |||||||||||
1993 | 53.97 | a | 56.93 | a | 67.13 | a | 74.03 | 81.90 | 90.63 | 90.53 | a | 86.10 | b | 85.40 | 73.81 | 62.40 | 55.83 | a | 73.22 | |||||||
1994 | 58.43 | a | 59.18 | 67.42 | 74.37 | 81.90 | 95.10 | 94.06 | 93.39 | 85.90 | 74.23 | 60.10 | a | 56.16 | 75.02 | |||||||||||
1995 | 53.29 | 63.30 | a | 64.65 | 71.10 | a | 78.03 | 88.63 | 93.39 | 92.73 | a | 85.27 | 79.48 | b | 68.67 | 57.17 | a | 74.64 | ||||||||
1996 | 58.94 | 62.69 | 67.14 | b | 75.13 | 85.74 | 92.53 | 90.45 | b | 86.84 | 79.34 | a | 73.48 | 63.86 | a | 57.10 | 74.44 | |||||||||
1997 | 51.90 | 58.18 | 69.77 | a | 69.77 | 82.48 | 88.97 | 91.67 | a | 88.17 | a | 86.19 | c | 73.13 | 63.03 | 49.45 | 72.72 | |||||||||
1998 | 56.48 | 53.93 | 61.97 | 67.53 | 80.16 | 88.48 | a | 89.68 | 90.03 | 87.60 | 74.23 | 65.07 | 57.19 | 72.70 | ||||||||||||
1999 | 60.35 | 65.29 | 68.67 | a | 71.23 | 81.55 | 88.17 | 87.10 | b | 87.55 | 83.97 | 77.66 | b | 69.92 | d | 54.77 | 74.69 | |||||||||
2000 | 60.60 | a | 64.34 | 65.93 | a | 77.93 | a | 87.37 | a | 89.60 | 91.52 | 88.07 | a | 88.86 | a | 70.41 | b | 55.67 | 56.83 | b | 74.76 | |||||
2001 | 51.26 | 58.00 | c | 65.27 | a | 73.28 | a | 84.58 | 91.34 | a | 90.20 | a | 87.87 | 84.97 | 78.19 | 64.60 | 53.39 | 73.58 | ||||||||
2002 | 55.81 | 59.52 | a | 66.40 | a | 78.34 | a | 83.20 | a | 94.07 | b | 91.00 | a | 90.13 | a | 83.20 | 71.61 | 64.63 | 50.71 | 74.05 | ||||||
2003 | 61.53 | a | 57.18 | 64.26 | 71.90 | 83.45 | 90.30 | 94.68 | 91.39 | 87.50 | 80.26 | 63.70 | 54.97 | 75.09 | ||||||||||||
2004 | 53.71 | 54.31 | 69.39 | 69.00 | a | 82.43 | a | 89.61 | b | 90.84 | 85.81 | 80.80 | 71.40 | a | 58.47 | 53.97 | 71.64 | |||||||||
2005 | 56.39 | 54.21 | 61.87 | 73.17 | 82.97 | 90.07 | 94.00 | 88.57 | a | 85.40 | 74.35 | 68.07 | b | 58.58 | 73.97 | |||||||||||
2006 | 60.10 | a | 63.43 | 65.96 | d | 76.40 | 85.20 | a | 92.40 | 88.77 | 82.81 | 78.93 | b | 72.30 | a | 66.73 | 55.61 | 74.05 | ||||||||
2007 | 50.10 | 59.93 | 69.32 | 74.03 | 80.75 | s | 90.59 | a | 90.55 | 89.77 | 83.69 | a | 77.32 | 68.30 | 53.39 | 73.36 | a | |||||||||
2008 | 53.37 | a | 60.93 | b | 68.13 | 74.34 | a | 80.19 | 91.67 | 87.50 | c | 86.52 | d | 82.00 | b | 77.42 | 65.59 | a | 55.48 | b | 73.59 | |||||
2009 | 59.61 | 64.93 | 68.00 | a | 73.57 | 84.04 | c | 86.70 | c | 94.29 | 93.48 | h | 83.79 | b | 72.58 | 67.60 | 51.40 | a | 73.32 | a | ||||||
2010 | 51.97 | 55.36 | 62.86 | b | 72.27 | 80.19 | 90.30 | 87.15 | d | 87.71 | 87.37 | 76.32 | 62.23 | 59.94 | 72.81 | |||||||||||
2011 | 54.65 | 57.96 | 72.00 | 76.27 | 79.90 | 93.03 | a | 92.90 | 95.33 | s | 87.40 | 78.33 | a | 62.40 | 50.20 | a | 73.19 | a | ||||||||
2012 | 58.97 | 59.07 | 68.34 | b | 78.47 | 84.94 | 94.67 | 90.93 | a | 91.39 | 85.61 | b | 79.42 | 67.90 | 55.61 | 76.28 | ||||||||||
2013 | 52.10 | 56.54 | 70.48 | 75.77 | 81.97 | 95.13 | 87.71 | 88.61 | 83.00 | 74.61 | 63.27 | 53.58 | 73.56 | |||||||||||||
2014 | 60.03 | 66.15 | a | 68.48 | 74.79 | a | 81.59 | b | 92.63 | 90.65 | 85.30 | a | 82.41 | a | 76.84 | 62.67 | c | 55.10 | 74.72 | |||||||
2015 | 53.43 | a | 65.86 | 69.71 | 72.60 | 78.21 | b | 90.93 | 87.96 | c | 92.29 | 85.93 | 76.10 | 62.57 | 53.13 | 74.06 | ||||||||||
2016 | 53.31 | b | 67.00 | 71.23 | a | 73.70 | 79.72 | b | 93.13 | 94.26 | 86.97 | 82.41 | a | 78.71 | 64.72 | a | 57.37 | a | 75.21 | |||||||
2017 | 53.81 | 61.89 | 73.90 | a | 75.86 | a | 81.48 | b | 93.25 | b | 90.30 | a | 88.27 | a | 84.53 | 78.48 | 71.79 | a | 57.71 | 75.94 | ||||||
2018 | 59.47 | a | 61.07 | a | 67.97 | 79.03 | 84.61 | 93.25 | b | 91.07 | b | 90.10 | b | 88.21 | a | 69.52 | b | 62.17 | a | 53.97 | a | 75.04 | ||||
2019 | 54.68 | 54.89 | 65.68 | 74.55 | a | 76.53 | a | 89.73 | 94.06 | 94.27 | a | 85.40 | 74.48 | 63.43 | 53.23 | a | 73.41 | |||||||||
2020 | 56.03 | 58.70 | b | 64.87 | a | 74.76 | a | 85.77 | a | 90.63 | 95.21 | c | 96.15 | d | 86.20 | 82.17 | b | 68.37 | 55.81 | 76.22 | ||||||
2021 | 55.13 | 60.04 | b | 65.23 | 75.67 | 83.00 | 93.14 | a | 87.66 | b | 86.69 | b | 84.07 | a | 73.29 | 67.57 | 58.50 | a | 74.16 | |||||||
2022 | 55.55 | 59.11 | 66.81 | 78.21 | a | 85.35 | 90.23 | 90.63 | a | 86.13 | a | 83.38 | a | 68.97 | 60.15 | c | 54.74 | 73.27 | ||||||||
2023 | 53.26 | 56.96 | 63.37 | a | 76.33 | 82.57 | a | 89.50 | b | 99.50 | a | 93.55 | 88.55 | a | 79.47 | a | 66.27 | 58.84 | 75.68 | |||||||
2024 | 54.97 | 61.21 | 63.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.93 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.50 | 60.00 | 66.10 | 74.46 | 82.57 | 91.87 | 92.21 | 89.63 | 85.46 | 76.12 | 64.53 | 55.63 | 74.52 | |||||||||||||
S.D. | 3.55 | 3.45 | 3.61 | 2.91 | 2.67 | 2.51 | 2.75 | 2.89 | 2.76 | 3.39 | 3.40 | 3.41 | 1.23 | |||||||||||||
SKEW | -0.15 | 0.13 | 0.01 | -0.02 | -0.18 | 0.20 | 0.09 | -0.05 | -0.01 | -0.10 | -0.06 | 0.41 | -0.16 | |||||||||||||
MAX | 65.42 | 67.46 | 75.42 | 81.13 | 88.97 | 98.20 | 99.50 | 96.15 | 92.00 | 83.71 | 71.80 | 64.77 | 77.47 | |||||||||||||
MIN | 44.00 | 53.00 | 56.58 | 67.53 | 75.65 | 86.27 | 87.03 | 82.81 | 78.93 | 68.97 | 55.67 | 48.55 | 71.64 | |||||||||||||
YRS | 77 | 76 | 76 | 75 | 75 | 77 | 76 | 75 | 77 | 77 | 77 | 76 | 69 |