YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.00 | r | 60.35 | 57.58 | 46.77 | 36.84 | 32.40 | 22.96 | c | 42.82 | f | |||||
1966 | 14.55 | 16.29 | 28.74 | 35.72 | a | 46.13 | 56.03 | 62.81 | 59.16 | 50.43 | 37.61 | 30.60 | 18.45 | 38.04 | ||||||||||||
1967 | 10.90 | 23.46 | 33.81 | 34.97 | 42.00 | 52.93 | 62.06 | 60.45 | 51.83 | 38.65 | 27.03 | 14.26 | 37.70 | |||||||||||||
1968 | 9.06 | 25.93 | 28.35 | 34.27 | 44.10 | 55.13 | 62.42 | 55.90 | 46.70 | 37.60 | a | 27.17 | 11.90 | 36.54 | ||||||||||||
1969 | 21.77 | 23.25 | 23.52 | 35.33 | 47.41 | d | 51.83 | 62.90 | 62.81 | 52.93 | 35.16 | 24.37 | 21.67 | a | 38.58 | |||||||||||
1970 | 18.19 | 23.61 | 28.13 | a | 32.77 | 44.74 | 52.57 | 60.40 | a | 61.04 | c | 47.87 | 33.90 | b | 28.66 | a | 19.71 | 37.63 | ||||||||
1971 | 15.52 | 19.96 | 25.53 | a | 35.21 | b | 45.13 | a | 54.53 | 63.20 | a | 62.63 | a | 46.46 | d | 37.60 | a | 24.43 | 15.90 | 37.18 | ||||||
1972 | 16.71 | 20.71 | a | 30.00 | d | 38.24 | e | 44.10 | a | 56.22 | c | 59.53 | a | 59.12 | e | 51.72 | a | 42.71 | 27.47 | 13.70 | a | 38.35 | ||||
1973 | 0.80 | a | 19.39 | 30.33 | a | 33.96 | c | ----- | z | 53.17 | a | 59.97 | 61.07 | b | 49.50 | 38.86 | c | 30.17 | a | 20.08 | f | 37.72 | b | |||
1974 | 11.61 | c | 13.50 | b | 33.50 | a | 32.69 | d | 48.24 | b | 56.00 | b | 63.93 | b | 57.68 | c | 48.62 | a | 40.96 | c | 27.73 | 16.31 | e | 37.56 | ||
1975 | 11.88 | g | 20.85 | a | 29.00 | a | 32.55 | a | 41.60 | a | 49.68 | b | 62.83 | b | 57.04 | f | 48.37 | 34.00 | b | 23.07 | 15.50 | a | 35.74 | b | ||
1976 | 8.32 | 25.34 | 24.80 | a | 36.67 | 46.00 | a | 52.31 | a | 63.17 | a | 59.00 | 51.40 | 33.10 | 22.80 | 9.55 | 36.04 | |||||||||
1977 | 12.65 | 18.67 | a | 24.10 | 37.14 | a | 46.14 | b | 58.40 | 62.32 | 62.16 | 55.43 | 37.60 | f | 26.25 | b | 23.77 | 38.82 | a | |||||||
1978 | 23.35 | 26.32 | 33.68 | 38.12 | d | 44.47 | a | 57.67 | 61.06 | 58.68 | 47.60 | 39.03 | b | 29.55 | a | 9.42 | 39.08 | |||||||||
1979 | 11.68 | 13.57 | 29.12 | e | 37.80 | 45.84 | 50.77 | 59.58 | 56.86 | b | 48.57 | 38.17 | b | 20.03 | a | 13.47 | a | 35.45 | ||||||||
1980 | 28.72 | b | 32.74 | b | 30.22 | d | 36.31 | a | 42.93 | c | 52.77 | 58.21 | b | 56.54 | c | 46.72 | a | 34.53 | a | 26.10 | 21.77 | 38.96 | ||||
1981 | 17.90 | 19.68 | 27.81 | 39.27 | 43.74 | 56.57 | 61.71 | 56.68 | 52.20 | 38.97 | 28.17 | 20.52 | 38.60 | |||||||||||||
1982 | 16.55 | 21.29 | 29.97 | 32.93 | 43.94 | 50.93 | 60.77 | 60.35 | 51.48 | a | 32.48 | 25.10 | 19.58 | 37.12 | ||||||||||||
1983 | 18.10 | 25.82 | 31.13 | a | 33.07 | 44.10 | 52.73 | 62.29 | 61.61 | 50.23 | 37.74 | 28.83 | 22.58 | 39.02 | ||||||||||||
1984 | 9.19 | 16.69 | 27.00 | a | 31.37 | 45.90 | a | 52.23 | 61.58 | 60.48 | 51.57 | 36.68 | 23.93 | 20.32 | 36.41 | |||||||||||
1985 | 17.10 | 13.50 | b | 28.23 | 37.13 | 46.58 | 52.60 | 61.29 | 58.84 | 48.55 | a | 37.74 | 29.93 | 17.43 | a | 37.41 | ||||||||||
1986 | 18.52 | 27.14 | 32.55 | 37.03 | 42.97 | 55.63 | 59.84 | 60.48 | 50.17 | 34.47 | a | 27.80 | 18.57 | a | 38.76 | |||||||||||
1987 | 13.03 | 24.54 | 27.58 | 35.90 | a | 44.35 | ----- | z | 58.58 | 57.03 | a | 45.31 | a | 38.65 | 26.27 | 18.97 | a | 35.47 | a | |||||||
1988 | 10.07 | b | 20.07 | 25.29 | 34.17 | 42.81 | 57.70 | 60.10 | 59.10 | 46.00 | 38.48 | 26.60 | 12.73 | a | 36.09 | |||||||||||
1989 | 5.40 | a | 19.00 | a | 32.50 | a | 38.10 | 45.48 | 51.37 | c | 60.97 | 58.07 | a | 47.00 | c | 35.03 | a | 22.83 | a | 11.58 | 35.61 | |||||
1990 | 11.28 | b | 22.43 | 32.57 | a | 38.37 | 45.33 | d | 57.00 | 63.23 | 59.82 | c | 53.81 | c | 34.86 | c | 23.74 | c | 7.68 | 37.51 | ||||||
1991 | 9.70 | a | ----- | z | 28.57 | a | 32.34 | a | 41.41 | b | 52.86 | a | 59.03 | 58.90 | a | 47.63 | 35.13 | a | 24.41 | a | 18.73 | a | 37.16 | a | ||
1992 | 13.86 | b | 29.92 | c | 37.62 | e | 50.38 | a | 56.04 | e | 60.32 | b | 68.03 | a | 60.41 | d | 51.77 | d | 45.79 | g | 30.17 | 21.71 | g | 45.85 | b | |
1993 | 28.72 | b | 31.50 | b | 38.44 | d | 43.80 | e | 45.58 | g | 50.76 | e | 59.23 | e | 57.28 | f | 45.87 | g | 34.52 | f | 19.35 | d | 15.48 | 35.91 | d | |
1994 | 15.73 | a | 20.64 | c | 25.86 | c | 36.17 | a | 45.69 | e | 58.57 | b | 59.34 | b | 62.55 | b | 47.69 | d | 35.90 | b | 23.19 | c | 20.63 | a | 37.66 | |
1995 | 20.76 | b | 25.54 | 32.68 | 33.91 | h | 42.81 | 51.11 | b | 59.39 | 66.10 | a | 54.87 | 40.04 | c | 32.21 | b | 24.74 | 40.93 | a | ||||||
1996 | 21.71 | 27.74 | b | 32.89 | c | 37.53 | 53.85 | d | 64.31 | a | 68.53 | a | 66.65 | 52.69 | a | 40.93 | c | 31.18 | b | 24.57 | a | 43.55 | ||||
1997 | 23.66 | b | 25.04 | d | 33.37 | a | 36.37 | 50.73 | a | 62.72 | a | 63.61 | 63.45 | b | 56.53 | 40.42 | 30.55 | a | 21.23 | 42.31 | ||||||
1998 | 24.67 | a | 27.25 | 31.03 | b | 36.34 | a | 49.77 | a | 53.10 | a | 67.97 | 62.64 | c | 56.45 | a | 39.90 | b | 29.23 | 15.76 | b | 41.18 | ||||
1999 | 22.55 | 23.88 | b | 32.26 | 34.83 | 43.45 | 56.29 | b | 62.90 | 59.50 | a | 50.68 | b | 36.48 | 27.14 | b | 18.55 | 39.04 | ||||||||
2000 | 23.30 | a | 28.41 | b | 29.35 | 39.71 | b | 51.07 | a | 58.17 | 63.65 | 65.71 | 53.24 | a | 42.20 | a | 24.28 | a | 19.84 | 41.58 | ||||||
2001 | 17.80 | a | 24.96 | a | 32.16 | 39.89 | b | 49.03 | 59.69 | d | 65.37 | a | 61.90 | 51.83 | a | 40.33 | a | 30.29 | b | 17.23 | a | 40.87 | ||||
2002 | 17.53 | a | 17.04 | a | 26.60 | a | 39.87 | 46.68 | 59.71 | b | 65.07 | a | 59.48 | 52.13 | 36.19 | 26.61 | b | 19.17 | b | 38.84 | ||||||
2003 | 22.48 | b | 23.29 | 31.13 | 39.04 | c | 47.93 | a | 56.33 | 61.93 | d | 63.00 | d | 50.59 | a | 42.45 | 28.69 | a | 20.48 | f | 42.44 | a | ||||
2004 | 16.14 | b | 22.79 | a | 33.69 | b | 40.41 | a | 51.37 | a | 56.80 | 63.23 | 60.58 | 48.44 | e | 41.57 | a | 29.20 | 20.32 | 40.38 | ||||||
2005 | 27.90 | 27.56 | a | 30.83 | a | 35.73 | 48.43 | c | 55.43 | 64.43 | a | 60.33 | a | 52.17 | 41.03 | 28.70 | 17.90 | 40.87 | ||||||||
2006 | 18.84 | 19.08 | c | 29.03 | b | 38.80 | 48.52 | b | 58.60 | 66.13 | a | 61.92 | e | 48.25 | b | 39.76 | b | 29.33 | 20.07 | b | 39.86 | |||||
2007 | 13.93 | c | 26.88 | b | 30.86 | b | 39.48 | c | 50.45 | b | 56.64 | e | 67.61 | c | 65.25 | c | 55.41 | c | 39.17 | b | 27.68 | b | 19.93 | a | 41.11 | |
2008 | 15.77 | a | 24.00 | c | 29.80 | a | 34.57 | 44.22 | d | 56.44 | c | 66.68 | 61.52 | 51.03 | 38.06 | 29.33 | 21.16 | 39.38 | ||||||||
2009 | 18.16 | 23.89 | a | 29.55 | 35.52 | a | 50.83 | a | 54.80 | 64.13 | 59.29 | 54.45 | a | 35.06 | n | 29.67 | 12.55 | 39.35 | a | |||||||
2010 | 16.16 | 24.00 | 29.63 | a | 38.83 | 45.19 | 58.17 | 64.74 | 61.03 | a | 51.57 | 41.19 | 27.53 | 25.71 | 40.31 | |||||||||||
2011 | 13.23 | 20.18 | 29.10 | 34.57 | 43.03 | 57.57 | 62.62 | b | 63.00 | 52.50 | 37.71 | 28.25 | b | 16.84 | 38.22 | |||||||||||
2012 | 17.45 | 22.17 | 30.20 | a | 38.08 | d | 47.00 | b | 57.87 | 66.77 | 62.77 | a | 51.76 | a | 39.55 | 26.57 | g | 21.65 | e | 41.39 | a | |||||
2013 | 7.86 | b | 19.71 | 29.13 | 36.57 | b | 49.16 | 59.40 | 67.74 | 62.48 | 54.50 | 36.00 | 26.23 | 10.29 | c | 38.26 | ||||||||||
2014 | 16.54 | c | 25.00 | 28.38 | b | 37.93 | 46.97 | 55.90 | 65.83 | a | 60.29 | 55.23 | 40.66 | b | 24.20 | 24.45 | 40.11 | |||||||||
2015 | 19.97 | 24.61 | 31.39 | 37.37 | 46.90 | 60.53 | 61.14 | c | 61.48 | 53.83 | 44.45 | 27.79 | a | 19.00 | 40.71 | |||||||||||
2016 | 18.14 | b | 19.18 | a | 29.59 | d | 36.33 | 43.61 | 59.40 | 65.00 | a | 60.14 | b | 50.90 | 39.62 | b | 30.57 | b | 19.23 | a | 39.31 | |||||
2017 | 21.71 | 30.25 | 32.97 | 37.47 | 46.03 | a | 58.38 | a | 64.68 | 60.23 | 53.19 | d | 33.67 | a | 31.43 | 16.08 | f | 42.73 | a | |||||||
2018 | 18.48 | b | 24.12 | b | 29.26 | 38.63 | c | 47.90 | 59.00 | a | 66.63 | a | 62.87 | 52.83 | a | 40.55 | 21.87 | 18.20 | a | 40.03 | ||||||
2019 | 18.38 | g | 22.43 | 31.17 | b | 40.96 | c | 44.45 | 54.33 | 64.81 | 61.26 | 53.57 | 30.65 | e | 24.13 | 19.77 | 40.69 | a | ||||||||
2020 | 17.73 | a | 18.81 | b | 31.68 | f | 36.07 | 50.13 | 55.48 | c | 63.13 | 64.33 | a | 49.25 | b | 35.06 | 26.60 | 13.03 | 39.06 | a | ||||||
2021 | 16.48 | 22.88 | c | 28.93 | a | 34.97 | 47.53 | a | 61.62 | a | 66.87 | 60.94 | 53.47 | 38.07 | a | 28.46 | d | 23.16 | 40.28 | |||||||
2022 | 16.55 | 17.30 | a | 27.17 | a | 36.07 | a | 46.16 | 55.63 | 66.06 | 63.90 | 55.48 | a | 37.77 | a | 22.69 | a | 19.32 | 38.68 | |||||||
2023 | 19.71 | 15.32 | 26.93 | a | 35.23 | 48.23 | 54.36 | e | 63.68 | 62.37 | a | 52.61 | b | 39.70 | h | 23.57 | g | 21.26 | d | 39.97 | b | |||||
2024 | 20.70 | d | 25.58 | j | 31.31 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.01 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.75 | 22.62 | 29.97 | 36.82 | 46.40 | 55.91 | 63.07 | 60.87 | 51.10 | 37.93 | 27.05 | 18.15 | 38.84 | |||||||||||||
S.D. | 5.59 | 4.41 | 2.94 | 3.05 | 3.05 | 3.26 | 2.71 | 2.42 | 2.89 | 2.89 | 3.03 | 4.24 | 1.83 | |||||||||||||
SKEW | -0.21 | -0.06 | 0.29 | 1.53 | 0.80 | 0.19 | 0.19 | 0.18 | -0.11 | -0.21 | -0.46 | -0.54 | 0.25 | |||||||||||||
MAX | 28.72 | 32.74 | 38.44 | 50.38 | 56.04 | 64.31 | 68.53 | 66.65 | 56.53 | 44.45 | 32.40 | 25.71 | 43.55 | |||||||||||||
MIN | 0.80 | 13.50 | 23.52 | 31.37 | 41.41 | 49.68 | 58.21 | 55.90 | 45.31 | 30.65 | 19.35 | 7.68 | 35.45 | |||||||||||||
YRS | 57 | 57 | 58 | 57 | 56 | 57 | 59 | 57 | 58 | 54 | 57 | 55 | 43 |