YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | 22.95 | 29.40 | 33.37 | c | 46.64 | c | 56.38 | b | 65.38 | a | 65.44 | 52.71 | a | 40.65 | ----- | z | 18.37 | a | 43.13 | b | ||||
1971 | 20.16 | 25.30 | 30.61 | 40.08 | 47.66 | c | 59.26 | a | 65.02 | a | 65.52 | 53.15 | 44.90 | a | 32.07 | 13.82 | c | 41.46 | ||||||||
1972 | 7.77 | a | 18.62 | ----- | z | 43.40 | 49.42 | a | 60.07 | 65.27 | 63.36 | b | 56.17 | 48.12 | a | 27.80 | ----- | z | 44.00 | b | ||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.95 | 21.95 | k | |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.52 | a | ----- | z | 35.52 | k |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.83 | ----- | z | ----- | z | ----- | z | 58.83 | k | |
1980 | ----- | z | 18.60 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.60 | k | |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | 9.66 | 29.25 | a | 44.62 | 50.73 | 57.85 | 66.23 | 62.21 | 56.08 | 43.35 | 32.17 | 18.77 | 42.81 | a | ||||||||||
1990 | 15.00 | c | 21.55 | 35.48 | 43.60 | 48.40 | a | 59.92 | 65.18 | 61.35 | 58.22 | 43.05 | 31.43 | a | 14.06 | 41.44 | ||||||||||
1991 | 9.52 | 19.52 | 28.55 | 37.08 | 47.65 | 57.50 | b | 62.82 | a | 62.55 | c | 55.81 | a | 46.15 | 27.65 | f | 16.87 | a | 40.36 | a | ||||||
1992 | 14.03 | 24.76 | 34.85 | 46.17 | l | 52.69 | e | 58.62 | 61.79 | 62.66 | 55.38 | 47.87 | a | 25.27 | 14.21 | c | 41.10 | a | ||||||||
1993 | 13.63 | 18.38 | b | 24.36 | c | 38.15 | 50.11 | 56.82 | b | 61.50 | 60.73 | a | 52.75 | 42.92 | 24.67 | 13.89 | c | 38.16 | ||||||||
1994 | 11.55 | 11.77 | 33.09 | b | 40.57 | b | 51.15 | 61.47 | a | 65.21 | b | 65.45 | a | 56.46 | d | 43.92 | 29.25 | b | 17.50 | c | 40.61 | |||||
1995 | 16.11 | 27.86 | 30.58 | e | 38.36 | b | 45.55 | b | 55.90 | 60.34 | 65.02 | 55.30 | 42.31 | 34.27 | 25.16 | b | 41.39 | |||||||||
1996 | 15.19 | 16.07 | a | 29.02 | 39.67 | 52.94 | 59.37 | 66.40 | 64.44 | 54.12 | d | 43.35 | 31.64 | e | 16.73 | 40.74 | ||||||||||
1997 | 13.42 | a | 10.40 | b | 26.20 | a | 39.15 | c | 51.40 | b | 58.19 | c | 62.44 | 63.05 | a | 57.72 | a | 41.78 | f | 30.02 | b | 13.98 | b | 38.72 | a | |
1998 | 16.71 | c | 21.19 | a | 29.25 | a | 37.91 | b | 49.67 | a | 56.58 | 67.05 | 63.73 | 59.85 | 44.60 | 30.38 | 22.71 | b | 41.64 | |||||||
1999 | 22.43 | c | 24.06 | a | 37.15 | 39.25 | 46.97 | b | 57.43 | 65.84 | 62.60 | 53.98 | 44.22 | d | 33.68 | 16.77 | 42.03 | |||||||||
2000 | 20.20 | a | 20.74 | 32.57 | a | 44.28 | a | 52.58 | a | 60.72 | 66.58 | 65.82 | 57.53 | 46.37 | a | 22.44 | c | 17.81 | b | 42.30 | ||||||
2001 | 8.81 | 18.16 | 33.27 | c | 42.41 | a | 52.10 | b | 58.67 | a | 66.35 | a | 64.17 | b | 57.17 | a | 44.85 | a | 34.55 | 11.95 | 41.04 | |||||
2002 | 12.86 | b | ----- | z | 26.18 | a | 42.09 | b | 49.58 | ----- | z | 68.02 | a | 62.78 | a | 55.73 | b | 42.96 | c | 28.57 | j | 18.32 | c | 42.06 | c | |
2003 | 15.95 | k | 22.08 | d | 31.63 | d | 42.15 | f | 49.38 | f | 58.69 | d | 70.50 | n | 65.70 | a | 54.27 | d | 48.78 | b | 31.64 | b | 21.71 | c | 41.81 | d |
2004 | 5.84 | b | 13.64 | a | 35.77 | a | 43.98 | b | 52.23 | 58.53 | a | 64.12 | j | 60.79 | e | 54.23 | b | 43.70 | c | 34.04 | c | 14.18 | 37.90 | a | ||
2005 | 18.06 | 19.77 | b | 29.95 | c | 40.05 | i | 50.89 | l | 56.93 | a | 66.23 | 62.85 | 56.56 | e | 47.36 | i | 33.67 | 9.53 | 39.28 | c | |||||
2006 | 8.39 | 9.41 | a | 28.56 | 42.69 | a | 51.76 | 60.37 | 67.16 | 64.15 | 51.62 | a | 42.82 | a | 30.62 | 22.24 | b | 39.98 | ||||||||
2007 | 12.44 | 25.43 | 34.73 | 42.83 | 50.34 | 60.37 | 67.97 | 66.63 | 57.45 | 44.68 | a | 33.88 | a | 12.72 | a | 42.45 | ||||||||||
2008 | 0.77 | 11.44 | d | 18.84 | 35.65 | 48.10 | 57.66 | a | 65.08 | 64.23 | 55.14 | a | 44.91 | b | 34.17 | 18.85 | a | 37.90 | ||||||||
2009 | 14.50 | b | 21.02 | a | 32.12 | c | 40.13 | 54.37 | a | 56.67 | 63.95 | 61.40 | 55.98 | a | 40.81 | 31.52 | 11.52 | a | 40.33 | |||||||
2010 | 12.98 | c | 15.02 | e | 25.00 | a | 41.94 | d | 47.84 | b | 59.37 | 66.92 | 62.95 | a | 56.35 | 46.34 | 28.12 | a | 27.87 | e | 40.89 | |||||
2011 | 9.93 | c | 15.13 | e | 29.64 | b | 40.33 | a | 45.95 | 58.62 | 66.72 | a | 65.92 | 55.98 | 44.12 | a | 30.65 | g | 18.42 | g | 43.23 | b | ||||
2012 | 19.09 | c | 18.43 | 32.40 | g | 44.52 | b | 51.60 | b | ----- | z | 66.35 | 65.25 | c | 54.75 | f | 44.05 | 32.08 | 16.84 | 39.80 | c | |||||
2013 | 3.34 | 11.09 | 27.42 | a | 38.45 | 48.45 | 60.08 | 67.58 | 63.26 | 57.05 | 40.55 | 31.50 | d | 9.74 | 38.21 | |||||||||||
2014 | 14.35 | 19.59 | 29.02 | 39.17 | 47.77 | 56.83 | 65.16 | 61.37 | 57.27 | 45.37 | 29.64 | a | 21.05 | 40.55 | ||||||||||||
2015 | 11.06 | 24.59 | 32.78 | a | 40.02 | 47.63 | 59.57 | 61.98 | 62.94 | 56.44 | d | 48.33 | d | 30.57 | a | 16.42 | 41.03 | |||||||||
2016 | 5.11 | 11.16 | d | 33.52 | 40.67 | ----- | z | 60.93 | 62.79 | 60.58 | a | 54.31 | a | 46.19 | ----- | z | 15.75 | c | 39.10 | b | ||||||
2017 | ----- | z | 24.02 | 32.18 | 40.05 | 47.92 | 60.02 | 65.52 | 61.89 | 55.85 | 45.48 | h | 36.71 | d | 25.13 | 44.93 | b | |||||||||
2018 | 19.73 | 25.64 | 32.29 | 42.24 | a | 51.02 | b | 61.43 | 68.10 | 63.92 | 56.83 | 43.27 | 24.35 | 11.37 | 41.68 | |||||||||||
2019 | 9.24 | 7.82 | 25.40 | 40.77 | 45.19 | 56.42 | 64.35 | 63.79 | 56.93 | 38.34 | 29.78 | a | 14.22 | a | 37.69 | |||||||||||
2020 | 12.03 | 17.57 | 33.08 | 41.38 | 52.26 | 60.75 | 64.94 | 66.31 | 55.13 | 45.83 | a | 31.88 | 12.95 | 41.18 | ||||||||||||
2021 | 12.34 | 19.98 | a | 29.79 | 41.13 | 50.05 | 62.07 | 68.23 | 63.23 | 57.83 | 43.45 | 34.79 | b | 20.37 | 41.94 | |||||||||||
2022 | 13.52 | 14.34 | 28.61 | 40.95 | 50.16 | 61.40 | 68.39 | i | 66.26 | 58.63 | 43.44 | 25.78 | 18.65 | 38.34 | a | |||||||||||
2023 | 10.77 | 6.34 | 20.68 | 35.00 | 51.56 | 56.00 | 67.90 | 66.19 | 56.17 | 45.23 | 31.57 | 23.74 | 39.26 | |||||||||||||
2024 | 17.24 | 20.95 | 32.97 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.10 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.80 | 18.05 | 30.02 | 40.45 | 49.70 | 58.82 | 65.38 | 63.70 | 55.97 | 44.28 | 30.92 | 17.24 | 40.61 | |||||||||||||
S.D. | 4.93 | 5.62 | 4.03 | 2.68 | 2.34 | 1.78 | 2.08 | 1.74 | 1.80 | 2.28 | 3.41 | 4.52 | 1.43 | |||||||||||||
SKEW | -0.28 | -0.34 | -0.72 | -0.58 | -0.12 | -0.00 | -0.69 | -0.03 | -0.31 | -0.19 | -0.74 | 0.38 | -0.87 | |||||||||||||
MAX | 22.43 | 27.86 | 37.15 | 44.62 | 54.37 | 62.07 | 68.23 | 66.63 | 59.85 | 48.78 | 36.71 | 27.87 | 42.45 | |||||||||||||
MIN | 0.77 | 6.34 | 18.84 | 33.37 | 45.19 | 55.90 | 60.34 | 60.58 | 51.62 | 38.34 | 22.44 | 9.53 | 37.69 | |||||||||||||
YRS | 35 | 39 | 36 | 35 | 35 | 36 | 35 | 38 | 38 | 35 | 34 | 37 | 23 |