YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.52 | i | 87.16 | f | 83.52 | b | 80.19 | c | 63.34 | b | 46.93 | b | 48.43 | c | 64.48 | g |
1958 | 43.96 | c | 50.96 | c | 47.54 | e | 59.62 | d | 78.75 | g | 87.61 | l | 91.55 | i | 89.57 | j | 82.29 | i | 69.91 | i | 58.11 | l | 56.19 | j | 50.52 | h |
1959 | 47.95 | j | 47.21 | i | 56.36 | i | 64.91 | h | 75.43 | j | 86.95 | h | 91.25 | s | 85.41 | n | 82.87 | g | 68.96 | e | 56.75 | f | 49.82 | i | 68.96 | k |
1960 | 39.71 | j | 42.56 | b | 57.31 | b | 68.15 | d | 72.61 | m | 83.62 | f | 89.84 | l | 90.61 | h | 84.10 | i | 70.00 | j | 57.16 | k | 41.56 | m | 56.01 | i |
1961 | 47.05 | j | 51.11 | i | 55.13 | h | 63.85 | j | 78.09 | i | 88.67 | f | 91.36 | i | 85.61 | h | 76.84 | k | 70.57 | h | 49.79 | k | 41.70 | k | ----- | z |
1962 | 40.41 | i | 51.11 | i | 52.41 | i | 72.33 | i | 76.09 | i | 85.73 | h | 89.29 | j | 90.65 | h | 80.40 | j | 71.39 | h | 58.70 | g | 53.00 | l | ----- | z |
1963 | 43.18 | i | 51.00 | i | 50.33 | j | 63.72 | a | 77.77 | 82.53 | 90.42 | 84.52 | b | 82.65 | j | 73.65 | h | 58.67 | l | 47.19 | j | 79.79 | g | |||
1964 | 42.18 | i | 37.26 | j | 47.09 | i | 61.04 | b | 73.61 | 81.75 | b | 89.52 | f | 84.13 | h | 77.24 | e | 73.23 | i | 53.95 | k | 42.59 | i | 73.41 | h | |
1965 | 38.65 | k | 45.21 | i | 50.22 | h | 65.82 | h | 72.08 | e | 79.93 | 85.35 | 84.35 | 73.53 | 71.10 | 57.41 | a | 45.50 | e | 71.16 | d | |||||
1966 | 40.62 | j | 40.58 | i | 58.83 | h | 67.57 | b | 77.32 | 81.87 | 88.52 | 85.71 | 79.30 | 69.10 | 58.63 | 46.12 | e | 72.68 | c | |||||||
1967 | 45.75 | o | 51.26 | i | 63.22 | h | 65.86 | b | 72.77 | 80.20 | 87.68 | 82.29 | 76.86 | a | 71.00 | 58.10 | 39.26 | l | 74.35 | d | ||||||
1968 | 44.18 | i | 48.20 | i | 53.10 | j | 58.67 | 70.19 | 84.50 | 85.06 | 79.65 | 76.70 | 67.81 | 50.53 | 41.83 | h | 71.64 | d | ||||||||
1969 | 46.64 | i | 45.53 | i | 47.62 | j | 63.86 | a | 73.87 | 78.33 | 86.61 | 86.32 | 76.50 | 59.86 | b | 51.21 | a | 44.00 | f | 72.07 | d | |||||
1970 | 41.62 | j | 51.84 | i | 47.86 | c | 58.17 | 73.38 | e | 78.97 | 86.00 | 85.52 | 74.43 | 59.68 | 52.67 | 45.04 | f | 68.52 | c | |||||||
1971 | 41.05 | l | 48.32 | i | 55.04 | h | 62.69 | d | 70.72 | b | 84.43 | 87.96 | d | 83.54 | c | 77.04 | c | 63.68 | 52.16 | e | 36.48 | j | 72.78 | d | ||
1972 | 42.28 | f | 51.00 | 62.61 | 65.07 | 73.16 | 81.87 | 87.16 | 82.81 | 76.17 | 64.70 | d | 42.73 | d | 40.97 | b | 66.20 | a | ||||||||
1973 | 38.19 | d | 42.86 | 48.16 | 55.90 | 69.19 | 82.43 | 85.94 | 86.13 | 75.50 | 69.16 | 54.48 | e | 46.45 | k | 64.36 | a | |||||||||
1974 | 38.00 | i | 45.47 | i | 59.00 | j | 65.27 | h | 79.41 | b | 88.10 | 86.55 | 83.13 | 78.13 | 65.42 | 53.45 | a | 39.39 | h | 76.31 | e | |||||
1975 | 38.80 | k | 44.32 | i | 50.57 | c | 58.93 | a | 71.00 | a | 82.33 | 84.58 | 84.35 | 74.67 | 69.69 | b | 55.59 | a | 46.68 | f | 70.19 | c | ||||
1976 | 46.71 | j | 55.32 | j | 58.09 | h | 63.78 | c | 73.74 | 83.52 | a | 87.23 | 83.74 | 77.18 | b | 64.45 | k | 55.08 | e | 37.47 | a | 70.22 | d | |||
1977 | 35.00 | a | 46.36 | 52.55 | 64.93 | 72.81 | 85.83 | 85.45 | 84.97 | 78.10 | 70.19 | 57.03 | a | 50.19 | e | 65.28 | ||||||||||
1978 | 43.10 | k | 46.33 | j | 58.17 | h | 68.11 | b | 71.35 | 85.83 | 90.19 | 85.55 | 79.52 | a | 69.77 | a | 51.83 | 38.90 | 71.23 | c | ||||||
1979 | 33.61 | 44.04 | a | 52.70 | a | 61.97 | 70.00 | 82.52 | a | 88.42 | 83.03 | 81.87 | 72.52 | b | 45.93 | b | 47.68 | 63.69 | ||||||||
1980 | 44.10 | 49.31 | 51.06 | 61.70 | 69.97 | a | 87.20 | 91.35 | 85.48 | 79.73 | 65.45 | 54.23 | 49.81 | d | 65.78 | |||||||||||
1981 | 49.67 | a | 51.14 | 49.87 | 66.33 | 69.71 | 84.37 | 85.35 | 82.13 | 74.83 | 62.74 | 57.89 | b | 47.75 | c | 65.15 | ||||||||||
1982 | 40.13 | 41.61 | 53.48 | f | 62.10 | a | 68.87 | a | 80.87 | 85.45 | b | 82.87 | 76.20 | e | 63.76 | j | 51.60 | j | 39.91 | h | 67.26 | d | ||||
1983 | 43.19 | j | 45.37 | i | 51.70 | h | 56.43 | i | 68.97 | b | 78.11 | b | 86.77 | 84.29 | 82.23 | d | 66.37 | l | 55.75 | j | 39.12 | f | 80.07 | g | ||
1984 | 38.97 | b | 45.72 | 50.77 | 58.07 | 76.16 | 79.80 | 87.23 | 84.34 | b | 78.93 | 55.29 | 51.33 | 39.71 | 62.19 | |||||||||||
1985 | 37.19 | 41.11 | 51.03 | 63.53 | 70.77 | 83.00 | 86.03 | 84.19 | 73.63 | 64.13 | 51.37 | 45.55 | 62.63 | |||||||||||||
1986 | 50.39 | 45.71 | 58.13 | 63.37 | 72.48 | 78.83 | 81.84 | 84.84 | 73.70 | 62.39 | 48.33 | 41.55 | 63.46 | |||||||||||||
1987 | 38.77 | 43.89 | 50.84 | 61.73 | 67.71 | 83.07 | 85.80 | a | 81.90 | 77.27 | 68.84 | 48.62 | a | 41.16 | 62.47 | |||||||||||
1988 | 34.58 | 46.66 | 50.90 | 59.27 | 67.26 | 81.47 | 87.58 | 82.42 | 75.37 | 72.87 | 58.23 | 50.87 | 63.96 | |||||||||||||
1989 | 40.45 | 45.39 | 62.29 | 68.57 | 75.26 | 80.23 | 82.81 | 76.23 | 73.43 | 62.06 | 56.77 | 46.81 | 64.19 | |||||||||||||
1990 | 41.00 | 46.21 | 54.55 | 63.70 | 70.68 | 86.40 | 82.90 | 82.94 | 79.37 | 68.90 | 54.67 | 39.82 | c | 64.26 | ||||||||||||
1991 | 34.48 | 50.18 | 51.61 | 62.70 | 72.77 | 80.57 | 85.52 | 83.65 | 76.03 | 72.39 | 50.93 | 41.26 | 63.51 | |||||||||||||
1992 | 39.55 | 46.79 | 55.65 | 68.60 | 72.74 | 81.07 | 84.61 | 83.58 | 79.63 | 70.97 | 47.93 | 36.16 | 63.94 | |||||||||||||
1993 | 40.39 | 45.46 | 56.77 | a | 63.67 | 71.87 | a | 82.47 | 87.48 | 81.97 | 77.17 | 65.00 | 50.86 | a | 45.48 | 64.05 | ||||||||||
1994 | 46.84 | 46.21 | 58.65 | 62.90 | 72.77 | 87.23 | 89.16 | 87.97 | 78.53 | 64.77 | a | 51.33 | 47.52 | 66.16 | ||||||||||||
1995 | 41.61 | 54.46 | 56.33 | a | 58.13 | 68.65 | 80.37 | 86.58 | 88.45 | 78.23 | 70.13 | 58.33 | 48.84 | 65.84 | ||||||||||||
1996 | 45.87 | 53.45 | 56.97 | 66.04 | c | 80.26 | 86.13 | 88.71 | 86.97 | 74.53 | 65.26 | 54.24 | a | 43.10 | 66.79 | |||||||||||
1997 | 39.40 | a | 45.96 | 61.58 | 59.57 | 72.97 | a | 82.80 | 86.74 | 84.94 | 80.00 | 67.81 | 53.32 | b | 40.10 | 64.60 | ||||||||||
1998 | 45.42 | 44.25 | 54.00 | 59.03 | 75.10 | 82.70 | 87.74 | 87.06 | 82.55 | a | 64.71 | 54.63 | 47.77 | 65.41 | ||||||||||||
1999 | 50.00 | 53.57 | 59.90 | 59.53 | 69.61 | 81.83 | 85.26 | 81.10 | 76.80 | 72.26 | 63.53 | 45.45 | 66.57 | |||||||||||||
2000 | 47.45 | 52.93 | 55.65 | 66.87 | 79.87 | 86.53 | 90.90 | a | 89.70 | a | 87.00 | v | 64.39 | 45.47 | 45.58 | 65.94 | a | |||||||||
2001 | 41.81 | 48.79 | 55.84 | 67.90 | 77.29 | 87.13 | 88.81 | 86.26 | 83.60 | 71.84 | 57.50 | 45.23 | 67.67 | |||||||||||||
2002 | 44.45 | 47.68 | 59.03 | 71.37 | 77.26 | 90.90 | 90.87 | 88.61 | 78.20 | 65.39 | 54.33 | 43.19 | 67.61 | |||||||||||||
2003 | 52.26 | 48.86 | 54.77 | 65.37 | 75.87 | 84.90 | 94.68 | 88.55 | 80.57 | 73.39 | 53.93 | 46.13 | 68.27 | |||||||||||||
2004 | 44.16 | 43.79 | 62.39 | 62.67 | 76.06 | 86.40 | 88.55 | 86.19 | 78.67 | 63.94 | 51.20 | 44.52 | 65.71 | |||||||||||||
2005 | 47.55 | 46.29 | 52.13 | 63.40 | 74.52 | 79.76 | m | 92.74 | 84.71 | 79.90 | 68.60 | a | 55.40 | 46.90 | 64.74 | a | ||||||||||
2006 | 47.29 | 51.39 | 53.87 | 66.80 | 78.55 | 84.87 | 88.42 | 82.19 | 73.20 | 64.29 | 57.53 | 42.27 | a | 65.89 | ||||||||||||
2007 | 36.80 | a | 45.11 | 57.39 | 62.93 | 71.19 | 84.40 | 90.29 | 88.84 | 80.50 | 68.55 | 58.80 | 41.37 | a | 65.51 | |||||||||||
2008 | 35.94 | 44.34 | 55.13 | 62.59 | a | 72.00 | 84.30 | 87.26 | 86.58 | 78.10 | 68.19 | 56.77 | 44.52 | 64.64 | ||||||||||||
2009 | 43.10 | 50.36 | 55.68 | 60.67 | 74.45 | 77.60 | 90.00 | 86.10 | 77.97 | 61.71 | 57.93 | 37.97 | 64.46 | |||||||||||||
2010 | 39.81 | 42.04 | 52.48 | 64.53 | 71.32 | 86.97 | 88.65 | 85.00 | 83.30 | 70.00 | 53.10 | 49.55 | 65.56 | |||||||||||||
2011 | 41.55 | 45.32 | 59.87 | 64.70 | 69.42 | 86.60 | 90.35 | 88.77 | 77.87 | 67.65 | 53.20 | 38.94 | 65.35 | |||||||||||||
2012 | 48.03 | 46.69 | 60.68 | 70.40 | 77.52 | 90.80 | 89.35 | 89.16 | 84.37 | 72.00 | 62.30 | 44.29 | 69.63 | |||||||||||||
2013 | 37.74 | 46.50 | 59.55 | 65.07 | 76.87 | 88.90 | 88.17 | a | 85.94 | 79.93 | 66.84 | 53.37 | 45.63 | a | 66.21 | |||||||||||
2014 | 48.38 | b | 51.88 | b | 59.23 | 67.17 | 72.74 | 86.60 | 89.55 | 84.55 | 83.77 | 70.71 | 55.07 | b | 48.39 | c | 68.17 | |||||||||
2015 | 45.93 | b | 51.46 | 61.06 | 67.03 | 69.52 | 87.77 | 85.90 | 87.45 | 82.33 | 69.39 | 54.45 | a | 42.29 | 67.05 | |||||||||||
2016 | 41.16 | 53.07 | 59.65 | 63.27 | 72.39 | 89.20 | 90.94 | 80.74 | 81.70 | 73.39 | 56.93 | 44.03 | 67.20 | |||||||||||||
2017 | 42.81 | 53.50 | 65.19 | 65.33 | 72.39 | 88.00 | 88.55 | 84.55 | 79.63 | 68.94 | 60.47 | 51.74 | 68.42 | |||||||||||||
2018 | 50.97 | 49.00 | 56.60 | a | 68.53 | 77.97 | 87.57 | 89.68 | 85.97 | 81.47 | 64.48 | 52.20 | 43.55 | 67.33 | ||||||||||||
2019 | 39.03 | 43.57 | 54.55 | 63.97 | 66.26 | 81.23 | 88.26 | 86.84 | 80.47 | 66.13 | a | 57.43 | 45.13 | 64.41 | ||||||||||||
2020 | 41.06 | 46.90 | 54.61 | 65.57 | 78.61 | 85.20 | 87.16 | 90.90 | 82.04 | c | 71.35 | 57.27 | 41.90 | a | 66.88 | |||||||||||
2021 | 42.26 | 45.68 | 53.58 | 64.77 | 74.39 | 85.21 | a | 86.74 | 87.07 | a | 86.03 | a | 66.61 | 60.43 | 48.74 | 66.79 | ||||||||||
2022 | 45.42 | 46.32 | 56.23 | 65.10 | 75.45 | 81.97 | ----- | z | ----- | z | 81.73 | 64.42 | 56.17 | f | 45.47 | a | 62.46 | c | ||||||||
2023 | 40.48 | b | 46.54 | 51.29 | 68.25 | b | 73.81 | 81.93 | 94.65 | 89.65 | 82.83 | a | 74.65 | 56.40 | 46.34 | b | 67.23 | |||||||||
2024 | 43.52 | 51.50 | a | 52.61 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.51 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.47 | 47.49 | 55.53 | 63.85 | 73.16 | 83.81 | 87.77 | 85.01 | 78.65 | 67.39 | 54.24 | 44.55 | 65.61 | |||||||||||||
S.D. | 4.71 | 3.54 | 4.24 | 3.38 | 3.34 | 3.23 | 2.56 | 2.69 | 3.07 | 3.97 | 4.16 | 3.72 | 1.75 | |||||||||||||
SKEW | 0.14 | 0.28 | 0.12 | -0.13 | 0.24 | 0.15 | 0.38 | -0.32 | 0.14 | -0.49 | -0.39 | -0.25 | 0.08 | |||||||||||||
MAX | 52.26 | 54.46 | 65.19 | 71.37 | 80.26 | 90.90 | 94.68 | 90.90 | 86.03 | 74.65 | 63.53 | 51.74 | 69.63 | |||||||||||||
MIN | 33.61 | 41.11 | 47.54 | 55.90 | 66.26 | 77.60 | 81.84 | 76.23 | 73.20 | 55.29 | 42.73 | 36.16 | 62.19 | |||||||||||||
YRS | 48 | 50 | 50 | 60 | 61 | 60 | 59 | 60 | 60 | 58 | 57 | 50 | 41 |