YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | 50.11 | d | 52.31 | 59.32 | 79.67 | 84.13 | 92.07 | a | 93.73 | a | 93.63 | a | 87.60 | 74.68 | 61.43 | 57.83 | a | 73.88 | ||||||||
1949 | 40.74 | 55.11 | 68.45 | b | 71.80 | 82.26 | 89.27 | 91.90 | 91.23 | a | 83.96 | c | 73.32 | 71.13 | 54.13 | a | 72.78 | |||||||||
1950 | 60.33 | a | 65.75 | 69.00 | b | 76.33 | 83.13 | 91.87 | 88.39 | c | 91.36 | c | 81.76 | a | 82.16 | 68.40 | 63.96 | e | 76.87 | |||||||
1951 | 55.90 | a | 61.04 | 64.26 | 73.57 | 83.58 | 90.96 | c | 97.13 | 93.55 | b | 90.00 | 83.52 | 66.00 | d | 56.77 | 76.36 | |||||||||
1952 | 61.16 | 60.00 | 61.33 | a | 71.50 | 83.41 | i | 95.69 | a | 91.58 | 94.37 | a | 89.10 | j | 76.70 | h | 57.27 | 54.16 | 71.90 | c | ||||||
1953 | 63.42 | 57.68 | 69.23 | 75.00 | 80.39 | 98.13 | 94.48 | 92.58 | 89.07 | 73.16 | l | 64.83 | 51.97 | 76.07 | a | |||||||||||
1954 | 58.35 | 68.29 | 65.48 | 79.93 | a | 81.06 | 93.87 | 96.58 | 92.68 | 87.87 | 75.32 | 67.55 | a | 59.81 | 77.23 | |||||||||||
1955 | 52.42 | 55.62 | d | 66.93 | c | 74.83 | 81.35 | 90.37 | 89.71 | 91.23 | 87.93 | 77.37 | a | 63.77 | 61.16 | 74.39 | ||||||||||
1956 | 59.26 | 52.92 | d | 72.42 | 75.73 | 89.42 | 95.48 | a | 94.10 | 91.61 | 91.20 | 78.71 | 64.33 | c | 58.97 | 77.01 | ||||||||||
1957 | 57.42 | 64.57 | 63.23 | 70.43 | 76.71 | 92.03 | 95.19 | 90.19 | 86.00 | 68.90 | 56.59 | a | 61.29 | 73.55 | ||||||||||||
1958 | 49.58 | 58.54 | 55.97 | 69.50 | 83.39 | 93.90 | 95.61 | 92.42 | 82.07 | a | 71.87 | 67.72 | a | 61.26 | 73.49 | |||||||||||
1959 | 55.68 | 56.25 | 69.00 | 73.43 | 82.94 | 91.73 | 91.94 | 91.23 | 88.70 | 73.70 | a | 61.60 | 55.27 | a | 74.29 | |||||||||||
1960 | 49.31 | b | 51.72 | 63.96 | c | 78.00 | a | 83.97 | 92.03 | 88.19 | 90.61 | 85.13 | 74.00 | 62.97 | 44.87 | 72.06 | ||||||||||
1961 | 52.29 | 58.75 | 63.55 | 73.93 | 84.10 | 91.10 | 91.10 | 89.74 | 81.83 | 77.29 | 56.13 | 50.97 | 72.57 | |||||||||||||
1962 | 50.61 | 64.18 | 60.65 | 76.20 | 87.23 | 89.37 | 89.13 | 94.84 | 83.53 | 76.26 | 63.63 | 55.39 | 74.25 | |||||||||||||
1963 | 50.23 | 58.21 | 66.90 | 76.50 | 83.94 | 88.67 | 95.55 | 90.87 | 85.33 | 79.68 | 64.60 | 52.83 | a | 74.44 | ||||||||||||
1964 | 53.29 | 48.52 | 62.90 | 75.03 | 84.61 | 92.67 | 95.00 | 92.68 | 83.30 | 79.13 | 62.83 | 55.45 | 73.78 | |||||||||||||
1965 | 59.87 | 57.21 | 59.06 | 75.77 | 79.97 | 88.03 | 93.81 | 89.16 | 83.07 | 76.52 | 68.60 | 57.26 | 74.03 | |||||||||||||
1966 | 46.97 | 54.54 | 69.42 | 75.53 | 85.10 | 87.57 | 96.29 | 86.03 | 84.60 | 74.45 | 66.97 | 54.73 | a | 73.52 | ||||||||||||
1967 | 57.55 | 59.57 | 71.97 | 77.77 | 83.13 | 88.67 | 92.52 | 85.55 | 82.23 | 79.81 | 63.38 | a | 46.74 | 74.07 | ||||||||||||
1968 | 52.90 | 58.03 | 61.68 | 70.27 | 81.55 | 92.97 | 89.83 | a | 87.94 | 84.13 | 79.55 | 61.83 | 56.45 | 73.09 | ||||||||||||
1969 | 60.90 | a | 56.82 | 57.23 | 74.43 | 82.13 | a | 88.50 | 95.19 | 91.87 | 81.57 | 68.35 | 61.23 | 55.81 | 72.84 | |||||||||||
1970 | 51.70 | a | 61.43 | 60.77 | 72.43 | 83.45 | 88.33 | 91.55 | 91.95 | k | 84.20 | 69.94 | 64.77 | 58.37 | a | 71.54 | a | |||||||||
1971 | 55.57 | a | 58.11 | 69.42 | 73.83 | a | 81.97 | 92.79 | a | 92.03 | 85.39 | 82.90 | 71.10 | 62.57 | 50.84 | 73.04 | ||||||||||
1972 | 57.55 | 63.83 | 73.67 | d | 79.60 | 82.26 | 91.07 | 88.55 | 87.13 | a | 81.14 | b | 73.06 | 51.93 | ----- | z | 75.44 | a | ||||||||
1973 | 49.82 | n | 53.12 | b | 59.87 | 66.28 | a | 78.81 | 88.00 | 89.71 | 91.29 | 82.80 | 76.87 | 68.57 | 59.96 | c | 74.12 | a | ||||||||
1974 | 56.48 | b | 59.32 | 71.97 | 74.70 | 88.28 | b | 92.07 | 93.03 | 87.03 | 75.80 | 72.00 | 61.11 | c | 49.09 | h | 75.62 | a | ||||||||
1975 | 52.54 | c | ----- | z | 66.39 | 70.80 | 80.29 | 91.33 | 87.03 | 90.39 | 81.10 | 77.48 | 65.80 | 55.90 | 74.46 | a | ||||||||||
1976 | 55.00 | 63.14 | 64.52 | 74.07 | 76.45 | 88.60 | 86.94 | 90.10 | a | 81.10 | 67.35 | 56.00 | 56.33 | d | 71.63 | |||||||||||
1977 | 47.19 | 57.36 | 61.03 | 71.73 | 81.16 | 92.87 | 93.26 | 90.71 | 85.97 | 74.32 | 64.73 | 59.00 | 73.28 | |||||||||||||
1978 | 46.84 | 49.00 | 63.97 | 76.80 | 80.65 | 89.10 | 92.68 | 88.81 | 80.70 | 72.74 | 56.77 | 47.55 | 70.47 | |||||||||||||
1979 | 41.32 | 54.57 | 62.00 | 71.47 | 77.84 | 84.27 | 93.06 | 88.74 | 83.37 | 79.63 | a | 55.33 | 54.58 | 70.52 | ||||||||||||
1980 | 52.45 | 55.83 | 63.45 | 70.00 | 77.45 | 95.70 | 97.90 | 90.42 | 82.63 | 70.58 | 59.30 | 61.06 | 73.07 | |||||||||||||
1981 | 54.87 | 60.71 | 60.84 | 75.67 | 78.90 | 93.80 | 92.35 | 87.61 | 82.83 | 71.19 | 66.27 | 58.58 | 73.64 | |||||||||||||
1982 | 51.55 | 53.57 | 65.29 | 71.47 | 82.10 | a | 88.87 | 92.52 | 91.81 | 84.14 | a | 71.32 | 57.57 | 47.35 | 71.46 | |||||||||||
1983 | 50.71 | 54.67 | a | 62.48 | 65.93 | 79.48 | 87.53 | 94.68 | 94.23 | 89.20 | 74.42 | 62.40 | 44.94 | 71.72 | ||||||||||||
1984 | 49.65 | 59.76 | 63.00 | 72.03 | 83.94 | 87.93 | 89.65 | 88.52 | 82.47 | 66.06 | 59.17 | a | 50.10 | 71.02 | ||||||||||||
1985 | 47.74 | 52.00 | 64.32 | 75.20 | 81.52 | 88.37 | 93.77 | 93.45 | 82.80 | 70.58 | 64.37 | 53.13 | 72.27 | |||||||||||||
1986 | 60.42 | 56.36 | 68.32 | 76.23 | 81.90 | a | 86.00 | 93.10 | 89.32 | 83.20 | 68.13 | 57.30 | 48.52 | 72.40 | ||||||||||||
1987 | 50.03 | a | 54.57 | 61.29 | 71.90 | 79.42 | 88.93 | 93.32 | 89.42 | 82.70 | 76.10 | 61.83 | 50.45 | 71.66 | ||||||||||||
1988 | 48.58 | 60.48 | 65.26 | 71.53 | 80.65 | 88.77 | 89.94 | 88.77 | 82.43 | 76.68 | 65.70 | 51.61 | 72.53 | |||||||||||||
1989 | 56.19 | 52.86 | 70.90 | 78.47 | 86.65 | 90.62 | a | 93.65 | 90.19 | 82.30 | 76.77 | 65.93 | 49.16 | 74.47 | ||||||||||||
1990 | 53.29 | 56.21 | 60.87 | 71.23 | 79.84 | 98.60 | 89.48 | 87.16 | 83.73 | 74.97 | 64.77 | 50.77 | 72.58 | |||||||||||||
1991 | 48.77 | 61.68 | 64.84 | 74.83 | 85.00 | 91.43 | 86.55 | 87.26 | 77.03 | 75.35 | 55.40 | 49.39 | 71.46 | |||||||||||||
1992 | 48.39 | 58.83 | 67.74 | 75.47 | 77.48 | 87.10 | 93.81 | 89.23 | 85.50 | 78.58 | 58.30 | 50.74 | 72.60 | |||||||||||||
1993 | 50.16 | 55.25 | 65.84 | 73.00 | 81.90 | 91.80 | 93.81 | 90.06 | 84.70 | 73.47 | a | 58.90 | 57.00 | 72.99 | ||||||||||||
1994 | 55.68 | 57.54 | 66.70 | a | 74.34 | a | 80.06 | 97.07 | 95.26 | 93.45 | 85.93 | 73.87 | 61.50 | 57.68 | 74.92 | |||||||||||
1995 | 52.16 | 64.04 | 63.06 | 70.50 | 79.77 | 88.70 | 95.13 | 93.35 | 82.60 | 77.26 | 67.13 | 54.74 | 74.04 | |||||||||||||
1996 | 55.68 | 59.34 | 63.16 | 75.10 | 91.42 | 92.80 | 92.19 | 89.00 | 80.00 | 73.33 | a | 63.13 | 58.00 | 74.43 | ||||||||||||
1997 | 46.35 | 50.29 | 69.23 | 64.73 | 78.77 | 87.93 | 93.32 | 89.52 | 85.80 | 73.48 | 59.37 | 46.65 | 70.45 | |||||||||||||
1998 | 54.13 | 55.61 | 61.16 | 69.13 | 87.29 | 94.93 | 95.81 | 88.90 | 90.47 | 73.16 | 64.03 | 55.43 | a | 74.17 | ||||||||||||
1999 | 58.68 | 64.29 | 64.45 | 70.17 | 77.90 | 88.10 | 91.81 | 91.55 | 82.53 | 78.73 | a | 71.23 | 54.29 | 74.48 | ||||||||||||
2000 | 59.32 | 65.62 | 67.58 | 75.97 | 89.10 | 90.13 | 96.06 | 96.23 | 90.87 | 69.65 | 53.73 | 52.10 | 75.53 | |||||||||||||
2001 | 47.16 | 58.21 | 60.39 | 76.63 | 83.84 | 94.23 | 97.87 | 93.84 | 88.37 | 76.13 | 69.00 | f | 55.00 | 75.61 | a | |||||||||||
2002 | 56.42 | 56.61 | 64.52 | 78.40 | 86.52 | 96.00 | 92.45 | 94.39 | 83.53 | 68.65 | 59.77 | 52.55 | 74.15 | |||||||||||||
2003 | 59.16 | 55.67 | a | 66.71 | 77.13 | 85.94 | 89.73 | 97.19 | 94.90 | 85.60 | 77.35 | 62.93 | 57.29 | 75.80 | ||||||||||||
2004 | 56.61 | 52.34 | 67.48 | 69.17 | 85.71 | 91.80 | 91.16 | 87.06 | 83.13 | 71.71 | 56.30 | 53.84 | 72.19 | |||||||||||||
2005 | 58.74 | 54.25 | 61.87 | 73.13 | 79.81 | ----- | z | 95.90 | 89.84 | 87.67 | 73.68 | 67.37 | 58.17 | a | 72.77 | a | ||||||||||
2006 | 61.10 | a | 60.61 | 65.06 | 79.07 | 88.68 | 95.93 | 93.97 | 88.00 | 79.60 | 72.90 | 67.10 | 52.84 | 75.40 | ||||||||||||
2007 | 44.55 | 59.75 | 67.73 | a | 69.77 | 78.65 | 90.70 | 93.32 | 95.23 | 87.40 | 80.16 | 66.07 | 54.42 | 73.98 | ||||||||||||
2008 | 52.71 | 61.31 | 67.03 | 75.14 | a | 83.10 | a | 96.21 | a | 89.77 | 90.23 | 83.57 | 75.00 | 66.13 | 55.94 | 74.68 | ||||||||||
2009 | 59.65 | 64.68 | 68.87 | a | 73.87 | 85.47 | a | 91.90 | 94.16 | 94.52 | 81.87 | 71.16 | 66.55 | a | 47.65 | 75.03 | ||||||||||
2010 | 52.90 | 51.21 | 62.00 | v | ----- | z | 87.70 | u | 96.43 | 92.71 | 93.52 | 90.43 | 78.20 | a | 68.10 | i | 58.92 | g | 79.34 | e | ||||||
2011 | 55.77 | 55.61 | 73.35 | 80.20 | 83.74 | 97.70 | 98.61 | 98.71 | 87.43 | 77.53 | a | 63.90 | 43.52 | 76.34 | ||||||||||||
2012 | 59.81 | 56.07 | a | 72.03 | 80.57 | 86.16 | 97.93 | 95.84 | 95.29 | 87.87 | 77.33 | a | ----- | z | 55.40 | a | 78.57 | a | ||||||||
2013 | 51.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.32 | 93.13 | 84.00 | 73.58 | 59.80 | 52.06 | 71.93 | e | |||||||
2014 | 55.81 | 57.64 | 65.16 | 74.03 | 81.39 | 92.40 | 90.87 | 89.42 | 80.83 | a | 77.61 | 59.83 | 54.87 | 73.32 | ||||||||||||
2015 | 48.13 | 57.82 | 64.29 | 73.87 | 77.71 | 90.03 | 94.61 | 92.87 | 90.17 | 73.65 | 62.47 | 56.27 | a | 73.49 | ||||||||||||
2016 | 53.52 | 64.31 | 70.50 | a | 74.69 | a | 79.74 | 95.62 | a | 100.85 | d | 100.85 | d | 86.33 | 82.84 | 66.37 | 55.90 | 77.63 | ||||||||
2017 | 54.35 | 67.68 | 75.26 | 75.90 | 82.81 | 95.43 | 97.06 | 89.42 | 86.17 | 76.35 | 70.73 | 58.68 | 77.49 | |||||||||||||
2018 | 56.19 | 61.79 | 70.03 | 76.43 | 90.81 | 96.80 | 96.00 | 93.29 | 85.17 | 70.90 | a | 59.47 | 53.87 | 75.90 | ||||||||||||
2019 | 55.42 | 60.11 | 63.71 | 75.37 | 81.87 | 92.30 | 97.61 | 100.00 | a | 92.73 | 72.83 | a | 62.67 | 58.23 | 76.07 | |||||||||||
2020 | 56.68 | 56.59 | 67.87 | 76.57 | 91.40 | a | 97.60 | 99.87 | 100.32 | 86.63 | 77.45 | 68.40 | 57.81 | 78.10 | ||||||||||||
2021 | 54.03 | 56.46 | 67.52 | 73.53 | 84.52 | 94.60 | 90.55 | 92.29 | 91.03 | 78.84 | 69.67 | 65.52 | 76.55 | |||||||||||||
2022 | 57.43 | a | 56.07 | 68.13 | 79.27 | 90.68 | 93.97 | 100.65 | 92.58 | 90.43 | 73.35 | 60.30 | 54.35 | 76.43 | ||||||||||||
2023 | 56.18 | c | 58.46 | 67.23 | 75.57 | 86.10 | 92.83 | 100.90 | 98.81 | 91.90 | 77.58 | 67.60 | 59.71 | 77.74 | ||||||||||||
2024 | 52.52 | 65.79 | 67.58 | 76.16 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.96 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.73 | 58.05 | 65.57 | 74.16 | 82.88 | 91.87 | 93.42 | 91.51 | 84.88 | 74.83 | 62.89 | 54.59 | 73.99 | |||||||||||||
S.D. | 4.75 | 4.39 | 4.02 | 3.36 | 3.64 | 3.31 | 3.26 | 3.34 | 3.50 | 3.71 | 4.39 | 4.53 | 1.91 | |||||||||||||
SKEW | -0.40 | 0.21 | 0.10 | -0.42 | 0.50 | 0.17 | 0.14 | 0.71 | 0.20 | -0.05 | -0.28 | -0.28 | 0.27 | |||||||||||||
MAX | 63.42 | 68.29 | 75.26 | 80.57 | 91.42 | 98.60 | 100.90 | 100.85 | 92.73 | 83.52 | 71.23 | 65.52 | 78.10 | |||||||||||||
MIN | 40.74 | 48.52 | 55.97 | 64.73 | 76.45 | 84.27 | 86.55 | 85.39 | 75.80 | 66.06 | 51.93 | 43.52 | 70.45 | |||||||||||||
YRS | 76 | 75 | 75 | 74 | 73 | 74 | 76 | 75 | 75 | 74 | 73 | 73 | 64 |