YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | 71.00 | 80.30 | 83.45 | 80.16 | 77.53 | 62.00 | a | 42.55 | a | 29.90 | a | 65.86 | d | |||||
1957 | 24.81 | d | 35.85 | a | 49.90 | 55.93 | 63.90 | b | 76.03 | 81.06 | 78.52 | b | 72.59 | c | 58.29 | 39.90 | 38.10 | a | 56.24 | |||||||
1958 | 34.57 | a | 45.86 | 44.03 | 57.70 | 71.77 | 79.83 | 81.65 | 84.93 | a | 74.37 | 64.47 | a | 46.67 | 43.21 | b | 60.75 | |||||||||
1959 | 36.81 | 38.70 | a | 49.52 | 59.71 | b | 67.87 | 82.00 | 85.96 | c | 80.73 | a | 70.13 | 63.19 | 47.59 | a | 36.16 | 59.87 | ||||||||
1960 | 26.06 | 29.93 | a | 50.97 | 65.17 | 68.63 | a | 80.24 | a | 86.57 | c | 83.55 | 75.03 | 60.48 | 44.83 | a | 34.03 | 58.79 | ||||||||
1961 | 36.07 | a | 43.79 | 49.42 | 59.07 | 69.68 | 82.67 | 84.68 | 82.59 | b | 65.33 | 58.81 | 41.13 | 28.81 | 58.50 | |||||||||||
1962 | 24.48 | 35.46 | 39.58 | 63.83 | a | 68.97 | 76.83 | 82.20 | a | 82.48 | 74.60 | 63.94 | 50.00 | a | 36.77 | a | 58.26 | |||||||||
1963 | 26.28 | b | 46.86 | 48.42 | 55.32 | b | 73.23 | 76.13 | 86.74 | 81.10 | b | 76.77 | d | 67.65 | h | 52.42 | r | 35.96 | d | 60.68 | b | |||||
1964 | 33.48 | b | 39.07 | b | 42.69 | b | 56.63 | c | 69.63 | d | 72.16 | e | 86.81 | d | 81.04 | c | 73.95 | i | 66.55 | b | 39.80 | 28.81 | 56.06 | a | ||
1965 | 29.55 | 33.64 | 40.71 | 56.70 | 62.58 | 72.70 | 80.16 | 79.10 | 64.07 | 64.90 | 49.87 | 33.61 | 55.63 | |||||||||||||
1966 | 29.97 | 34.07 | 50.84 | 61.33 | 71.29 | 80.75 | n | 88.00 | i | 83.94 | n | 75.24 | i | 60.50 | i | 52.05 | j | 28.04 | g | 49.50 | g | |||||
1967 | 31.83 | b | 36.58 | b | 52.72 | f | 58.32 | e | 64.81 | 72.59 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.82 | g | |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 68.53 | n | 77.83 | 83.77 | 75.77 | 71.50 | 61.87 | 44.17 | 30.42 | 63.62 | e | |||||||
1969 | 35.55 | 33.89 | 41.19 | 60.79 | a | 75.32 | 72.60 | 84.84 | 85.37 | d | 75.79 | a | 52.87 | 45.77 | 38.65 | 58.55 | ||||||||||
1970 | 31.55 | 45.79 | 46.45 | 52.33 | 69.52 | 75.97 | a | 83.53 | a | 84.39 | 70.53 | 57.00 | 45.87 | 34.03 | 58.08 | |||||||||||
1971 | 32.81 | 39.46 | 49.42 | 58.17 | 65.93 | a | 79.17 | 85.16 | 85.06 | 70.60 | 57.93 | b | 35.93 | 28.13 | 57.31 | |||||||||||
1972 | 34.74 | 44.83 | 57.77 | 61.07 | 70.03 | 78.04 | b | 84.61 | 82.79 | c | 72.00 | 58.32 | 39.13 | 25.10 | 59.04 | |||||||||||
1973 | 19.19 | 26.43 | 42.00 | 52.90 | 68.87 | a | 76.90 | a | 80.81 | 81.77 | 70.53 | 62.26 | 39.91 | h | 32.03 | 55.79 | a | |||||||||
1974 | 22.00 | 30.54 | 54.10 | 57.59 | a | 71.84 | 82.00 | 85.33 | a | 83.06 | 77.82 | b | 62.74 | 46.62 | a | 33.03 | a | 58.89 | ||||||||
1975 | 32.23 | a | 35.18 | 45.48 | 52.03 | 64.90 | 73.27 | 83.97 | 79.81 | 73.90 | 59.84 | 44.30 | 32.68 | 56.47 | ||||||||||||
1976 | 30.32 | 39.38 | 44.06 | 58.24 | a | 69.87 | 76.80 | 85.61 | 81.10 | 73.87 | 61.13 | 49.07 | 37.52 | 58.91 | ||||||||||||
1977 | 34.06 | 44.18 | 47.26 | 65.07 | 66.19 | 84.67 | 84.48 | 82.45 | 75.03 | 63.70 | a | 45.90 | 39.50 | a | 61.04 | |||||||||||
1978 | 32.26 | 36.18 | 51.45 | 58.50 | 67.06 | 78.20 | 84.97 | 80.84 | 73.63 | 64.73 | a | 37.00 | 21.03 | 57.15 | ||||||||||||
1979 | 19.87 | 32.11 | 43.39 | 58.73 | 67.52 | b | 78.93 | 85.16 | 81.48 | 80.23 | 64.39 | 38.72 | a | 33.13 | 56.97 | |||||||||||
1980 | 29.94 | 37.14 | 45.84 | 59.00 | 64.23 | 78.79 | a | 85.00 | 81.90 | 73.83 | 59.32 | 46.50 | 43.87 | 58.78 | ||||||||||||
1981 | 41.77 | 46.18 | 50.00 | 64.77 | 65.03 | a | 80.93 | a | 84.40 | a | 83.65 | 76.69 | d | 55.61 | 47.07 | a | 38.71 | 61.23 | ||||||||
1982 | 31.29 | 37.78 | a | 47.40 | a | 55.33 | 67.31 | b | ----- | z | 82.52 | d | 83.50 | a | 72.46 | d | 56.45 | 40.52 | a | 31.45 | 55.09 | a | ||||
1983 | 33.45 | 37.32 | 47.50 | a | 51.38 | a | 62.90 | 74.40 | 81.90 | 83.50 | a | 74.72 | a | 61.55 | b | 41.44 | c | 26.30 | d | 56.36 | ||||||
1984 | 20.86 | b | 29.90 | 42.00 | 54.15 | d | ----- | z | 73.92 | f | 84.00 | k | 80.84 | 71.64 | b | 52.52 | d | 44.83 | f | 29.60 | a | 47.69 | d | |||
1985 | 24.10 | a | 27.12 | b | 44.40 | a | 64.10 | 69.97 | a | 79.10 | i | 84.84 | f | ----- | z | 69.06 | l | 57.44 | f | 41.33 | 27.92 | e | 42.71 | e | ||
1986 | 32.61 | ----- | z | 56.00 | 56.61 | b | 67.00 | d | 80.53 | 82.00 | r | 83.66 | b | 67.15 | d | 57.20 | a | 46.48 | a | 34.24 | j | 60.81 | c | |||
1987 | 34.62 | e | 42.35 | e | 46.73 | a | 64.52 | a | 66.64 | c | 79.70 | c | 81.24 | j | 78.71 | 73.46 | f | 62.81 | 44.67 | c | 31.29 | g | 57.86 | c | ||
1988 | 24.87 | a | 34.15 | b | 45.48 | 61.69 | d | 68.56 | d | 81.46 | b | 85.53 | l | 83.96 | g | 70.04 | d | 68.16 | 45.72 | a | 29.74 | h | 55.57 | c | ||
1989 | 27.58 | 28.14 | 51.70 | d | 64.71 | f | 69.48 | h | 76.39 | b | 88.52 | f | 80.04 | d | 74.55 | h | 62.11 | c | 49.93 | b | 36.90 | b | 51.60 | d | ||
1990 | 37.13 | 36.27 | b | 52.07 | a | 65.65 | d | 69.11 | c | 83.21 | b | 85.59 | b | 84.43 | a | 79.11 | b | 62.55 | b | 45.00 | a | 26.66 | b | 60.56 | ||
1991 | 24.32 | 39.57 | 48.31 | b | 56.85 | c | 68.89 | c | 77.48 | a | 84.63 | a | 83.21 | c | 74.24 | e | 64.50 | c | 42.10 | a | 29.60 | a | 57.81 | |||
1992 | 28.13 | a | 40.21 | a | 53.48 | 68.48 | c | 72.76 | b | 77.43 | b | 81.40 | a | 82.72 | b | 75.90 | a | 65.29 | 39.79 | a | 30.81 | 59.70 | ||||
1993 | 30.13 | 31.39 | 48.35 | 58.23 | 69.83 | a | 74.59 | c | 81.10 | b | 80.26 | 74.36 | b | 59.44 | m | 39.68 | b | 34.61 | 56.60 | a | ||||||
1994 | 39.97 | 37.84 | c | 56.17 | a | 61.17 | 74.07 | a | 84.00 | a | 87.70 | a | 85.74 | 77.07 | a | 57.48 | b | 40.93 | ----- | z | 63.83 | a | ||||
1995 | 34.10 | 48.11 | a | 52.39 | 56.96 | c | 60.71 | 73.40 | 82.41 | b | 83.90 | 74.73 | 62.21 | b | 51.62 | a | 41.32 | 60.16 | ||||||||
1996 | 35.81 | 40.36 | a | 51.83 | b | 60.17 | a | 70.29 | 80.79 | a | 86.90 | 85.29 | 71.80 | 59.62 | b | 46.13 | 35.19 | 60.35 | ||||||||
1997 | 31.42 | 34.18 | 51.21 | b | 53.71 | b | 71.23 | 78.72 | a | 82.74 | 81.71 | 71.45 | a | 59.23 | a | 41.63 | 31.16 | 57.37 | ||||||||
1998 | 40.42 | 39.86 | 49.47 | a | 56.43 | 68.61 | 73.23 | 86.93 | a | 84.29 | 76.90 | 59.90 | 47.33 | 32.33 | a | 59.64 | ||||||||||
1999 | 37.03 | a | 42.30 | a | 55.34 | b | 54.62 | a | 66.57 | c | 76.83 | 86.00 | c | 81.55 | 70.37 | 65.69 | b | 52.10 | 36.39 | 60.40 | ||||||
2000 | 38.81 | 40.59 | 50.84 | 64.43 | 73.55 | 82.17 | 89.13 | 86.00 | a | 73.97 | a | 60.29 | 38.07 | 37.20 | a | 61.25 | ||||||||||
2001 | 34.29 | 38.96 | a | 53.45 | 59.66 | a | 73.03 | 82.41 | a | 86.74 | 83.58 | 77.43 | 63.47 | a | 48.69 | a | 30.23 | 61.00 | ||||||||
2002 | ----- | z | 38.04 | a | 47.90 | 65.00 | 73.63 | a | 86.64 | b | 93.58 | 86.14 | j | 75.97 | a | 58.26 | 41.17 | 28.23 | 60.84 | b | ||||||
2003 | 31.55 | 35.71 | 52.00 | a | ----- | z | 71.35 | 80.29 | f | 91.83 | h | 86.78 | d | 75.27 | 69.10 | b | 38.97 | 33.03 | 54.86 | c | ||||||
2004 | 27.10 | 32.93 | a | 57.90 | 60.70 | 70.72 | b | 77.23 | 84.77 | 81.55 | 73.45 | a | 58.68 | 41.20 | 34.74 | 58.41 | ||||||||||
2005 | 35.13 | 39.21 | 50.43 | a | 59.45 | a | 68.50 | a | 73.57 | 87.71 | 80.87 | 73.83 | a | 61.74 | 46.67 | 34.32 | 59.29 | |||||||||
2006 | 35.87 | 41.11 | 45.90 | a | 62.30 | 72.03 | a | 82.97 | 86.80 | a | 80.90 | a | 69.83 | 56.21 | b | 46.67 | 31.63 | a | 59.35 | |||||||
2007 | 21.70 | a | 39.71 | 56.03 | 62.27 | 70.61 | 83.50 | 89.48 | 86.74 | 74.80 | 59.90 | a | 49.03 | 24.10 | 59.82 | |||||||||||
2008 | 21.68 | 32.62 | 43.03 | a | 55.53 | 65.77 | 77.50 | b | 86.55 | 82.42 | 73.72 | a | 60.23 | a | 49.62 | a | 30.77 | 56.62 | ||||||||
2009 | 31.71 | 40.29 | 51.74 | 58.07 | b | 70.29 | c | 71.45 | a | 84.77 | 82.47 | a | ----- | z | 55.68 | 47.77 | 21.26 | 55.95 | a | |||||||
2010 | 26.59 | b | 28.79 | 47.17 | a | 58.03 | 62.60 | a | 77.13 | 84.84 | 80.77 | 78.10 | 60.61 | 42.57 | 34.16 | 56.78 | ||||||||||
2011 | 24.10 | 28.48 | a | ----- | z | 54.76 | a | 61.20 | a | 76.40 | 82.42 | 84.32 | 76.37 | 58.43 | a | 44.10 | 29.50 | a | 56.37 | a | ||||||
2012 | 38.23 | 39.90 | 56.48 | 64.18 | b | 72.42 | 83.57 | 85.77 | 85.33 | a | 76.83 | a | 61.58 | 50.46 | d | 30.35 | 62.09 | |||||||||
2013 | 17.65 | 30.25 | 49.60 | a | 54.69 | a | 69.48 | 84.87 | 88.03 | 83.32 | 71.87 | 57.16 | 41.93 | 22.68 | 55.96 | |||||||||||
2014 | 32.35 | 43.07 | 53.23 | a | 59.76 | a | 67.74 | l | 78.67 | c | 86.55 | 77.26 | 74.03 | 63.39 | 44.80 | 35.52 | 58.97 | a | ||||||||
2015 | 34.77 | 47.36 | 56.74 | 60.80 | 62.87 | 82.43 | 81.00 | 81.45 | 76.97 | 64.74 | 43.03 | 27.97 | 60.01 | |||||||||||||
2016 | 26.03 | 39.61 | a | 52.26 | 59.62 | f | 66.38 | g | 83.57 | 84.77 | 81.52 | 72.13 | 62.48 | 50.33 | 32.84 | 58.55 | b | |||||||||
2017 | 26.42 | 40.39 | 56.00 | 57.33 | 67.45 | 81.27 | 85.74 | 81.94 | 71.00 | 60.63 | a | 53.13 | 40.03 | 60.11 | ||||||||||||
2018 | 38.32 | 42.46 | 50.35 | 62.75 | b | 72.90 | 83.80 | 88.13 | h | 84.28 | f | 80.38 | a | 56.83 | a | 43.76 | a | 33.81 | 56.54 | b | ||||||
2019 | 29.48 | 30.25 | 42.26 | 60.28 | a | 63.45 | 75.17 | 85.50 | c | 84.65 | 74.43 | 53.39 | 47.23 | 31.97 | 56.50 | |||||||||||
2020 | 29.06 | 37.62 | 50.94 | 60.50 | 71.06 | 76.27 | d | 86.74 | d | 88.00 | 74.83 | 63.68 | 46.40 | 30.84 | 59.66 | |||||||||||
2021 | 29.94 | 38.61 | 49.69 | b | 59.90 | 70.32 | 84.87 | 88.10 | 83.77 | 76.17 | 57.65 | 50.52 | a | 37.00 | 60.54 | |||||||||||
2022 | 37.55 | 38.61 | 50.65 | 59.53 | 66.84 | 78.87 | 86.48 | 84.65 | 77.90 | 61.35 | 40.17 | 27.00 | 59.13 | |||||||||||||
2023 | 26.74 | 26.50 | 36.19 | 55.97 | 70.32 | 74.17 | 87.06 | 81.29 | 74.45 | a | 61.94 | 45.37 | 37.71 | 56.48 | ||||||||||||
2024 | 37.06 | 41.45 | 48.65 | 62.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.30 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.76 | 37.43 | 49.14 | 59.17 | 68.64 | 78.67 | 85.06 | 82.53 | 73.97 | 60.78 | 44.71 | 32.59 | 58.80 | |||||||||||||
S.D. | 5.67 | 5.44 | 4.78 | 3.76 | 3.40 | 3.81 | 2.47 | 2.33 | 3.22 | 3.52 | 4.07 | 4.95 | 1.69 | |||||||||||||
SKEW | -0.31 | -0.18 | -0.31 | 0.12 | -0.42 | 0.01 | 0.38 | -0.23 | -0.64 | -0.15 | -0.04 | -0.11 | -0.17 | |||||||||||||
MAX | 41.77 | 48.11 | 57.90 | 68.48 | 75.32 | 86.64 | 93.58 | 88.00 | 80.38 | 69.10 | 53.13 | 43.87 | 62.09 | |||||||||||||
MIN | 17.65 | 26.43 | 36.19 | 51.38 | 60.71 | 71.45 | 80.16 | 75.77 | 64.07 | 52.52 | 35.93 | 21.03 | 55.63 | |||||||||||||
YRS | 66 | 66 | 65 | 64 | 63 | 63 | 58 | 62 | 61 | 63 | 63 | 62 | 45 |