YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.63 | 31.75 | 20.45 | 34.94 | i | |||
1957 | 7.40 | 15.80 | 23.90 | 40.87 | 50.39 | 59.78 | 67.02 | 62.05 | 54.08 | 45.52 | 30.20 | 20.78 | a | 39.82 | ||||||||||||
1958 | 18.27 | 11.55 | 25.71 | 41.65 | 49.40 | 55.88 | 63.69 | 62.34 | 56.95 | 47.03 | 32.48 | 10.65 | a | 39.64 | ||||||||||||
1959 | 6.73 | 10.57 | 24.35 | 38.22 | 56.02 | 62.85 | 66.39 | 66.95 | 57.02 | 41.31 | 22.18 | 25.08 | 39.81 | |||||||||||||
1960 | 16.61 | 16.93 | 16.08 | 39.28 | 50.69 | 58.53 | 63.90 | 65.19 | 56.23 | 46.18 | 34.31 | a | 15.94 | 39.99 | ||||||||||||
1961 | 10.85 | 20.48 | 28.34 | 36.92 | 48.65 | 60.62 | 64.92 | 66.19 | 57.65 | 48.10 | 32.08 | 18.07 | a | 41.07 | ||||||||||||
1962 | 9.94 | 10.41 | 27.63 | 36.90 | 56.42 | 60.17 | 62.82 | 63.82 | 52.98 | 46.29 | 33.05 | 17.18 | 39.80 | |||||||||||||
1963 | 4.85 | 6.96 | 26.61 | 41.90 | 51.34 | 62.97 | 68.52 | 63.50 | 57.63 | 56.00 | 36.05 | 13.19 | 40.79 | |||||||||||||
1964 | 20.56 | 18.48 | 21.02 | 40.77 | 56.39 | 60.47 | 68.18 | 60.87 | 54.53 | 43.26 | 33.80 | 14.60 | 41.08 | |||||||||||||
1965 | 9.88 | a | 9.55 | 17.05 | 36.52 | 55.40 | 57.70 | 61.42 | a | 61.74 | 50.85 | 46.19 | 30.42 | 23.82 | 38.38 | |||||||||||
1966 | 7.84 | 15.54 | 28.94 | 35.38 | 46.32 | 63.05 | 69.29 | 62.27 | 55.10 | 44.02 | 28.62 | 17.85 | 39.52 | |||||||||||||
1967 | 15.00 | 7.98 | 25.37 | 39.98 | 44.74 | 60.28 | 62.89 | 60.15 | 56.37 | 42.61 | 26.68 | 19.89 | 38.50 | |||||||||||||
1968 | 11.60 | 9.98 | 30.74 | 41.17 | 48.45 | a | 58.97 | 64.27 | 63.31 | 57.30 | 48.55 | 30.13 | 18.27 | 40.23 | ||||||||||||
1969 | 15.44 | 16.61 | 19.58 | 41.17 | 52.03 | 53.85 | 64.56 | 67.68 | a | 56.23 | 41.77 | 30.73 | 20.27 | 39.99 | ||||||||||||
1970 | 8.87 | 12.38 | 21.15 | 39.27 | 48.26 | 62.37 | 68.16 | 65.56 | 57.00 | 49.27 | 30.70 | 18.18 | 40.10 | |||||||||||||
1971 | 8.29 | 14.45 | 20.47 | b | 38.28 | a | 47.45 | a | 63.10 | 61.50 | 61.55 | 59.02 | 51.50 | 30.73 | 19.45 | 39.65 | ||||||||||
1972 | 8.16 | 9.34 | 18.73 | 33.98 | 56.74 | 58.70 | 64.06 | 63.95 | 53.30 | 42.21 | 30.88 | 14.40 | 37.87 | |||||||||||||
1973 | 18.60 | 16.20 | 33.87 | 38.92 | 46.81 | 62.12 | 65.55 | 67.11 | 55.75 | 51.53 | 30.75 | 17.53 | 42.06 | |||||||||||||
1974 | 11.87 | 11.09 | 23.53 | a | 39.90 | 48.95 | 58.13 | 68.47 | 63.16 | 50.08 | 44.52 | 32.25 | 23.71 | 39.64 | ||||||||||||
1975 | 15.03 | 18.29 | 22.82 | 31.80 | 57.13 | 62.07 | 69.15 | 65.15 | 52.08 | 48.71 | 34.42 | 17.63 | 41.19 | |||||||||||||
1976 | 11.42 | 23.05 | 25.65 | 41.95 | 50.19 | 65.93 | a | 66.79 | 67.34 | 56.25 | 40.21 | 24.00 | 9.45 | 40.19 | ||||||||||||
1977 | 2.68 | 16.66 | 32.82 | 43.83 | 61.57 | a | 60.72 | 68.63 | 59.74 | 55.73 | 45.79 | 32.20 | 17.32 | 41.47 | ||||||||||||
1978 | 11.92 | a | 11.95 | 22.82 | 36.35 | 54.71 | 60.12 | 64.69 | 65.56 | 59.93 | 46.00 | 31.08 | 14.92 | 40.00 | ||||||||||||
1979 | 5.63 | 8.27 | 26.03 | 36.38 | 48.37 | 59.98 | 67.73 | 63.27 | 58.48 | 41.85 | 30.27 | 22.77 | 39.09 | |||||||||||||
1980 | 13.53 | 11.24 | 22.03 | 41.10 | 57.31 | 60.55 | 68.76 | d | 62.84 | 51.63 | 40.74 | 29.23 | 15.61 | 39.55 | ||||||||||||
1981 | 13.02 | 20.23 | 28.82 | 42.85 | 50.35 | 62.15 | 67.15 | 66.26 | 53.88 | 42.85 | 36.75 | 19.55 | 41.99 | |||||||||||||
1982 | 5.03 | 13.64 | 24.23 | a | 34.73 | 57.85 | a | 55.47 | 67.24 | 61.47 | 54.67 | a | 47.02 | 30.41 | a | 21.46 | f | 41.07 | a | |||||||
1983 | 18.17 | a | 22.15 | b | 28.03 | 35.57 | a | 47.50 | 62.08 | 71.13 | d | 69.56 | 58.82 | 45.73 | 33.00 | 9.87 | a | 41.80 | ||||||||
1984 | 12.29 | b | 27.35 | c | 17.87 | 41.03 | 48.19 | 63.86 | a | 65.95 | a | 68.50 | 53.63 | 48.77 | 32.38 | 18.24 | b | 41.51 | ||||||||
1985 | 10.95 | 11.44 | a | 30.28 | d | 42.29 | b | 55.29 | b | 58.78 | 64.80 | d | 63.02 | c | 57.43 | a | 47.88 | a | 27.20 | 14.25 | w | 42.67 | a | |||
1986 | 15.42 | g | 13.79 | b | 30.09 | d | 44.88 | b | 54.48 | h | 58.58 | d | 66.64 | c | 60.71 | c | 55.33 | f | 43.91 | d | 26.88 | d | 22.32 | c | 40.87 | c |
1987 | 18.75 | a | 26.44 | d | 33.00 | e | 43.61 | g | 56.48 | g | 64.84 | b | 69.46 | d | 66.11 | d | 58.61 | c | 40.78 | a | 34.73 | f | 24.68 | c | 44.74 | c |
1988 | 12.76 | h | 11.16 | g | 25.24 | b | 40.44 | d | 56.69 | d | 65.13 | d | 68.94 | e | 67.09 | b | 55.21 | d | 40.12 | c | 32.04 | c | 17.98 | a | 46.89 | b |
1989 | 20.30 | c | 8.96 | 20.86 | b | 37.42 | 51.82 | a | 59.31 | a | 69.26 | 65.90 | a | 58.19 | a | 47.09 | c | 25.90 | 8.19 | b | 39.43 | |||||
1990 | 23.13 | 19.56 | b | 31.43 | b | 44.10 | a | 47.83 | b | 62.68 | 65.00 | a | 65.45 | c | 56.86 | e | 43.48 | i | 35.35 | 19.78 | a | 42.83 | a | |||
1991 | 11.19 | b | 20.83 | a | 29.32 | a | 44.98 | a | 57.20 | a | 66.02 | b | 66.00 | 67.18 | 55.71 | a | 42.93 | a | 27.58 | e | 18.64 | b | 42.30 | |||
1992 | 17.21 | 18.88 | a | 22.10 | e | 36.48 | c | 55.09 | b | 57.64 | b | 58.97 | a | 59.88 | b | 55.52 | c | 42.27 | 27.95 | a | 19.39 | c | 39.28 | |||
1993 | 14.13 | a | 13.56 | b | 23.90 | 35.81 | a | 50.35 | d | 57.16 | a | 65.47 | b | 66.03 | b | 49.78 | c | 38.61 | h | 25.72 | c | 18.21 | b | 38.19 | a | |
1994 | 0.97 | a | 5.13 | b | 25.17 | b | 35.96 | b | 48.60 | b | 62.41 | b | 63.27 | a | 60.58 | 59.19 | c | 47.13 | d | 33.41 | a | 26.55 | b | 39.03 | ||
1995 | 16.12 | a | 15.78 | a | 27.05 | a | 31.82 | b | 49.98 | d | 66.09 | a | 66.02 | b | 68.75 | a | 53.35 | c | 45.55 | a | 21.29 | d | 14.26 | d | 39.67 | |
1996 | 6.89 | d | 7.46 | e | 17.15 | 31.17 | a | ----- | z | 60.57 | a | 61.11 | d | ----- | z | 56.29 | b | ----- | z | ----- | z | ----- | z | 34.38 | e | |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.42 | 64.26 | a | ----- | z | 31.67 | 20.39 | 45.68 | h | |||
2006 | 26.00 | 15.32 | 29.13 | ----- | z | 54.68 | ----- | z | ----- | z | 64.86 | c | 54.96 | g | 40.98 | g | 35.40 | e | 20.43 | x | 37.56 | f | ||||
2007 | 12.88 | n | 7.89 | i | 29.45 | c | 37.00 | a | ----- | z | 64.25 | 65.48 | c | 64.97 | 58.80 | 50.70 | f | 29.33 | a | 16.81 | 45.76 | d | ||||
2008 | 15.84 | 11.09 | 18.15 | d | 38.43 | 47.63 | 61.37 | 64.98 | 63.84 | 57.46 | c | 44.31 | 31.05 | 11.84 | 38.83 | |||||||||||
2009 | 5.28 | a | 15.45 | 23.85 | 37.87 | 49.77 | 58.85 | 59.87 | a | 62.35 | 61.88 | 39.32 | 38.43 | 17.31 | 39.19 | |||||||||||
2010 | 16.66 | 17.48 | 35.47 | 45.30 | 56.35 | 60.47 | 68.44 | 68.11 | 52.27 | 46.42 | 33.60 | 17.94 | 43.21 | |||||||||||||
2011 | 11.87 | 15.79 | 24.03 | 37.48 | 50.08 | 58.98 | 69.97 | 66.47 | 55.38 | 47.82 | 35.50 | g | 23.60 | a | 41.95 | a | ||||||||||
2012 | 17.92 | 23.31 | 40.47 | 40.33 | u | ----- | z | 64.22 | 69.94 | 64.21 | 53.57 | 44.04 | h | 30.39 | l | 24.33 | b | 44.74 | d | |||||||
2013 | 15.82 | 13.50 | 19.43 | a | 32.03 | 48.68 | 59.48 | 65.85 | 64.45 | 56.97 | 44.52 | 30.24 | g | 9.31 | m | 42.07 | b | |||||||||
2014 | 7.84 | i | 5.86 | 13.94 | 33.65 | 50.97 | 61.82 | 62.68 | 62.40 | 55.60 | 42.47 | 22.47 | 21.77 | 39.42 | a | |||||||||||
2015 | 11.15 | 0.24 | i | 23.97 | 39.13 | 52.47 | 57.45 | ----- | z | ----- | z | 64.22 | a | 46.11 | d | 37.79 | b | 28.00 | c | 40.03 | c | |||||
2016 | 16.11 | 19.57 | 29.90 | 35.86 | a | 52.36 | c | 62.17 | a | 66.50 | a | 67.25 | a | 59.83 | a | 46.82 | a | 39.72 | c | 18.29 | 42.87 | |||||
2017 | 18.52 | a | 21.82 | 23.31 | b | 40.14 | a | 48.00 | b | 61.81 | a | 65.24 | b | 61.54 | d | 60.43 | 49.83 | d | 28.35 | 14.37 | 41.11 | |||||
2018 | 13.97 | a | 12.41 | a | 22.60 | a | 28.75 | b | 58.38 | c | 62.34 | a | 67.79 | c | 66.59 | h | 58.68 | b | 39.35 | g | 23.29 | b | 21.88 | a | 37.01 | b |
2019 | 6.90 | b | 8.67 | a | 21.18 | a | 35.98 | e | 48.55 | c | 59.45 | b | 68.86 | c | 62.72 | b | 59.00 | a | 44.17 | b | 25.38 | d | 19.82 | a | 38.39 | |
2020 | 18.30 | c | 14.24 | j | 27.73 | 33.68 | 50.34 | 63.11 | c | 69.60 | a | 65.35 | 54.85 | 38.77 | c | 35.15 | 20.24 | b | 43.38 | a | ||||||
2021 | 18.98 | b | 5.29 | 28.25 | a | 39.38 | 51.67 | b | 65.05 | a | 65.32 | a | 66.25 | c | 57.55 | 51.58 | 29.02 | 19.66 | b | 41.50 | ||||||
2022 | 4.14 | c | 4.89 | 19.38 | a | 33.33 | 53.25 | c | 61.57 | a | 65.95 | 64.98 | a | 57.57 | 45.74 | 32.30 | b | 17.95 | c | 38.42 | ||||||
2023 | 19.95 | 17.45 | 22.63 | a | 37.83 | a | 52.33 | a | 62.84 | a | 63.71 | b | 61.73 | g | 59.53 | a | 46.77 | e | 31.71 | a | 30.47 | a | 40.47 | a | ||
2024 | 17.06 | 24.90 | 29.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.67 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.97 | 14.58 | 25.11 | 38.14 | 51.81 | 61.00 | 66.03 | 64.44 | 56.44 | 45.55 | 30.72 | 18.72 | 40.20 | |||||||||||||
S.D. | 5.50 | 5.61 | 5.17 | 3.75 | 3.83 | 2.70 | 2.72 | 2.49 | 3.02 | 3.61 | 4.05 | 4.47 | 1.30 | |||||||||||||
SKEW | -0.07 | 0.26 | 0.31 | -0.18 | 0.45 | -0.21 | -0.44 | -0.07 | 0.14 | 0.41 | -0.27 | 0.00 | 0.44 | |||||||||||||
MAX | 26.00 | 27.35 | 40.47 | 45.30 | 61.57 | 66.09 | 71.13 | 69.56 | 64.26 | 56.00 | 39.72 | 30.47 | 43.21 | |||||||||||||
MIN | 0.97 | 4.89 | 13.94 | 28.75 | 44.74 | 53.85 | 58.97 | 59.74 | 49.78 | 38.77 | 21.29 | 8.19 | 37.87 | |||||||||||||
YRS | 55 | 55 | 59 | 55 | 53 | 57 | 56 | 55 | 57 | 52 | 55 | 55 | 40 |