YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.10 | t | 24.55 | 24.55 | k | |
1956 | 24.16 | 18.17 | 27.84 | 30.07 | 40.42 | 40.30 | 45.58 | 46.52 | 39.89 | c | 30.68 | 19.37 | 17.16 | 31.68 | ||||||||||||
1957 | 6.58 | 24.25 | 26.74 | 28.21 | a | 36.43 | a | 39.73 | 44.29 | 45.65 | 36.87 | 30.52 | 24.07 | 24.71 | 30.67 | |||||||||||
1958 | 22.84 | 32.21 | 24.13 | 30.70 | 41.90 | 46.10 | a | 49.68 | 54.10 | 42.93 | 33.61 | 25.93 | 25.17 | a | 35.78 | |||||||||||
1959 | 24.90 | 20.96 | 23.75 | c | 31.63 | 33.58 | 46.40 | 50.48 | 46.97 | 43.50 | b | 37.52 | 23.43 | 15.97 | 33.26 | |||||||||||
1960 | 16.20 | a | 23.48 | 32.06 | 32.33 | 35.13 | 43.53 | 53.06 | 44.84 | 41.40 | 33.90 | a | 28.40 | 18.10 | 33.54 | |||||||||||
1961 | 20.00 | 27.82 | 27.52 | 29.03 | 35.15 | d | 48.30 | 50.84 | 54.87 | 36.77 | 32.32 | 22.83 | 17.61 | 33.59 | ||||||||||||
1962 | 9.00 | 21.79 | 23.60 | a | 32.23 | 36.71 | 41.87 | 45.48 | 46.58 | 39.13 | 31.55 | 25.37 | 22.65 | 31.33 | ||||||||||||
1963 | 11.03 | a | 29.21 | 22.23 | 27.73 | 41.16 | 42.83 | 43.74 | 45.77 | 45.00 | 38.06 | 28.93 | 19.00 | 32.89 | ||||||||||||
1964 | 18.65 | 18.62 | 22.20 | a | 27.00 | 34.77 | 43.57 | 47.97 | a | 44.14 | b | 37.73 | 32.45 | 25.47 | 24.83 | a | 31.45 | |||||||||
1965 | 23.32 | 24.57 | 18.68 | 33.07 | 33.07 | a | 42.47 | 47.84 | 46.13 | 33.17 | 32.84 | 27.23 | 15.55 | b | 31.49 | |||||||||||
1966 | 17.84 | 23.00 | r | 24.94 | 28.53 | 41.13 | 42.63 | 49.19 | 49.67 | a | 45.53 | 32.06 | 31.20 | 22.43 | a | 35.01 | a | |||||||||
1967 | 26.13 | 26.68 | 27.74 | 27.11 | c | 34.71 | 43.87 | 54.68 | 53.45 | 46.27 | 32.16 | 27.77 | 19.07 | a | 34.97 | |||||||||||
1968 | 17.13 | 26.03 | 28.13 | 24.57 | 34.58 | 42.77 | 50.26 | 44.97 | 41.23 | 31.39 | 28.20 | 19.97 | 32.44 | |||||||||||||
1969 | 22.21 | b | 23.68 | 24.42 | 31.07 | 36.13 | 46.27 | 49.26 | 46.26 | 41.80 | 28.97 | a | 23.33 | 25.00 | 33.20 | |||||||||||
1970 | 25.52 | 24.89 | 24.29 | 23.67 | 35.19 | 46.97 | a | 49.42 | 48.23 | 35.50 | 29.00 | 30.10 | 19.29 | 32.67 | ||||||||||||
1971 | 23.06 | 23.11 | 23.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.36 | e | 16.00 | f | 23.41 | h | |||
1972 | 18.34 | b | 24.07 | 27.50 | a | 27.63 | 37.77 | a | 46.63 | 48.16 | 45.73 | a | 34.77 | 32.77 | 28.07 | ----- | z | 33.77 | a | |||||||
1973 | 17.68 | 23.68 | 24.26 | 25.69 | a | 44.23 | 46.50 | 52.74 | 50.55 | 39.87 | 33.97 | 31.10 | 27.00 | 34.77 | ||||||||||||
1974 | 17.10 | 22.50 | 27.90 | 30.27 | 36.68 | c | 47.72 | a | ----- | z | 46.87 | 39.17 | 29.00 | 25.17 | 18.00 | 30.94 | a | |||||||||
1975 | 17.65 | 20.82 | 24.16 | 22.83 | 33.30 | a | 39.63 | 51.00 | ----- | z | ----- | z | ----- | z | 25.10 | 27.23 | 29.08 | c | ||||||||
1976 | 21.71 | 24.68 | a | 21.10 | 27.10 | 35.55 | 42.73 | 51.35 | 47.71 | 40.76 | a | 28.06 | 24.63 | 13.00 | 31.53 | |||||||||||
1977 | 5.90 | 20.75 | 21.26 | 30.23 | 33.39 | 47.97 | 48.10 | 50.42 | 41.07 | 32.74 | 24.17 | 26.55 | 31.88 | |||||||||||||
1978 | 26.13 | a | 27.00 | 30.65 | 30.80 | 32.35 | 42.13 | 48.87 | 44.87 | 40.53 | 30.42 | 21.13 | 13.90 | 32.40 | ||||||||||||
1979 | 9.39 | 23.57 | 29.32 | 30.20 | 37.45 | 41.80 | 51.35 | 50.00 | 42.80 | 36.71 | 18.43 | 22.29 | 32.78 | |||||||||||||
1980 | 18.39 | 27.76 | 23.65 | 31.97 | 40.58 | 40.43 | 49.90 | 43.00 | 42.13 | 31.94 | 23.67 | 20.74 | 32.85 | |||||||||||||
1981 | 21.55 | 21.50 | 25.58 | 31.20 | 34.52 | d | 42.33 | 46.61 | 49.50 | a | 40.87 | 30.59 | b | 29.67 | 26.35 | 33.36 | ||||||||||
1982 | 20.74 | 20.18 | 26.55 | 25.83 | 33.97 | 44.60 | 50.19 | 49.00 | 39.71 | b | 33.06 | 19.73 | 19.68 | 31.94 | ||||||||||||
1983 | 23.81 | 26.57 | 29.13 | a | 27.57 | 36.68 | 41.43 | 46.74 | 52.42 | 38.73 | d | 33.68 | 30.57 | 19.18 | c | 33.88 | ||||||||||
1984 | 9.00 | 17.74 | b | 28.00 | 29.17 | a | 39.42 | e | 40.33 | c | 51.10 | 52.48 | b | 38.04 | b | 32.86 | c | 28.93 | c | 13.34 | b | 31.70 | ||||
1985 | 14.17 | a | 19.37 | a | 22.18 | c | 33.48 | a | 39.27 | a | 43.59 | a | 54.17 | a | 43.43 | a | 32.36 | e | 28.95 | j | 17.90 | a | 9.43 | c | 29.94 | a |
1986 | 23.55 | 28.56 | c | 30.77 | a | 30.90 | 37.45 | b | 47.21 | a | 47.30 | a | 51.00 | a | 35.76 | e | 30.07 | a | 25.18 | b | 15.00 | a | 33.56 | |||
1987 | 14.22 | d | 20.46 | 26.90 | 32.52 | a | 39.89 | c | 47.21 | a | 44.57 | a | 42.36 | c | 34.77 | h | 28.48 | b | 21.57 | 16.77 | 30.45 | a | ||||
1988 | 12.34 | b | 18.68 | d | 19.10 | b | 31.28 | a | 36.93 | b | 47.59 | c | 50.67 | a | 46.07 | b | 38.96 | e | 37.08 | f | 29.19 | c | 17.47 | a | 31.66 | a |
1989 | 17.04 | c | 9.78 | a | 27.96 | d | 29.65 | d | 32.57 | c | 41.00 | b | 48.21 | b | 42.74 | d | 36.28 | a | 31.28 | b | 22.31 | a | 17.13 | a | 29.66 | |
1990 | 17.52 | 14.35 | b | 18.67 | d | 31.46 | b | 36.50 | o | ----- | z | 49.11 | c | 48.07 | d | 42.97 | ----- | z | 25.89 | k | 8.93 | c | 28.88 | d | ||
1991 | 19.10 | a | 26.60 | c | 27.41 | b | 30.96 | b | 35.68 | f | 39.75 | b | 48.86 | c | 50.32 | c | 42.04 | b | 30.95 | i | 26.82 | b | 17.45 | b | 32.93 | b |
1992 | 22.59 | b | 26.59 | b | 26.48 | 32.63 | 37.74 | 46.61 | b | 48.23 | 49.23 | 40.20 | 33.94 | 19.40 | 16.19 | 33.32 | ||||||||||
1993 | 11.40 | a | 15.00 | 30.00 | 32.66 | a | 42.84 | 41.63 | 38.77 | 41.42 | 38.10 | 34.03 | 17.33 | 21.90 | 30.42 | |||||||||||
1994 | 24.80 | a | 19.89 | 28.32 | 31.77 | 40.10 | 40.31 | a | 46.94 | 45.06 | 40.17 | 28.65 | 18.67 | 15.81 | 31.71 | |||||||||||
1995 | 23.10 | 26.36 | 25.30 | a | 28.30 | 36.84 | 41.93 | 48.45 | 42.13 | 41.07 | 27.39 | 32.34 | a | 23.32 | 33.04 | |||||||||||
1996 | 24.30 | a | 23.24 | 28.03 | 31.77 | 32.39 | 41.90 | 50.29 | 46.52 | 38.53 | 31.42 | 27.83 | 26.16 | 33.53 | ||||||||||||
1997 | 21.10 | a | 20.18 | 29.83 | a | 28.87 | 37.60 | a | 44.60 | 47.58 | 48.03 | 41.47 | 30.71 | 26.53 | 14.00 | 32.54 | ||||||||||
1998 | 26.26 | 24.82 | 25.48 | 28.03 | 37.06 | 40.50 | 53.55 | 49.26 | 45.07 | 29.32 | 28.70 | 16.87 | a | 33.74 | ||||||||||||
1999 | 22.39 | 23.57 | 25.29 | 25.43 | 31.68 | 38.70 | 46.48 | 47.35 | 35.40 | 29.77 | 26.43 | 14.10 | 30.55 | |||||||||||||
2000 | 21.06 | 25.31 | 21.52 | 30.83 | 37.87 | 41.83 | 46.74 | 47.32 | 36.63 | 28.00 | 17.90 | 15.32 | 30.86 | |||||||||||||
2001 | 11.06 | 16.25 | 25.58 | 24.80 | 35.10 | 40.60 | 47.27 | a | 51.94 | 44.70 | 37.04 | f | 28.11 | b | 23.59 | b | 31.73 | a | ||||||||
2002 | 23.30 | a | 22.11 | a | 24.07 | b | 31.83 | a | 37.04 | d | 47.93 | 56.10 | 46.48 | 42.43 | 27.88 | e | 26.74 | c | 26.33 | g | 35.08 | a | ||||
2003 | 26.22 | h | 19.60 | c | 30.97 | a | 31.12 | e | 37.68 | f | 43.33 | l | 57.43 | j | 53.83 | m | 43.59 | h | 37.52 | h | 25.62 | d | 26.48 | j | 26.83 | h |
2004 | 19.42 | l | 22.74 | j | 29.76 | j | 31.88 | f | 39.37 | l | 42.44 | l | 55.90 | 53.97 | 42.89 | k | 34.50 | s | 25.92 | d | 23.06 | m | 45.26 | i | ||
2005 | 20.84 | f | 19.48 | g | 24.70 | k | 32.88 | e | 40.56 | d | 41.13 | g | 52.87 | a | 50.65 | h | 41.14 | b | 35.95 | k | 23.50 | d | 21.15 | d | 35.35 | f |
2006 | 27.26 | h | 19.88 | l | 25.64 | i | 30.88 | m | 38.47 | n | 46.14 | i | 57.14 | c | 45.89 | v | 40.80 | t | 30.62 | r | 26.96 | g | 18.83 | g | 57.14 | k |
2007 | 13.71 | g | 25.24 | g | 29.05 | l | 29.00 | j | 37.37 | l | 48.29 | m | 59.09 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.67 | y | 24.92 | r | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.75 | s | 48.43 | a | 43.23 | 28.55 | 21.97 | 13.45 | b | 31.13 | g | |||
2010 | 27.45 | 23.57 | 23.30 | a | 24.96 | c | 34.86 | b | 42.17 | 47.93 | a | 47.07 | b | 42.21 | a | 38.11 | d | 25.30 | 23.93 | b | 33.41 | |||||
2011 | 20.60 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.60 | k |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.05 | 22.72 | 25.66 | 29.46 | 36.82 | 43.41 | 49.29 | 47.69 | 40.08 | 31.68 | 25.13 | 19.30 | 32.57 | |||||||||||||
S.D. | 5.60 | 4.21 | 3.26 | 2.74 | 3.02 | 2.79 | 3.41 | 3.31 | 3.23 | 2.74 | 3.84 | 4.70 | 1.34 | |||||||||||||
SKEW | -0.70 | -0.56 | -0.23 | -0.64 | 0.42 | 0.32 | -0.09 | 0.28 | -0.32 | 0.62 | -0.34 | -0.07 | 0.06 | |||||||||||||
MAX | 27.45 | 32.21 | 32.06 | 33.48 | 44.23 | 48.30 | 57.14 | 54.87 | 46.27 | 38.11 | 32.34 | 27.23 | 35.78 | |||||||||||||
MIN | 5.90 | 9.78 | 18.67 | 22.83 | 31.68 | 38.70 | 38.77 | 41.42 | 32.36 | 27.39 | 17.33 | 8.93 | 29.66 | |||||||||||||
YRS | 49 | 48 | 49 | 49 | 46 | 46 | 49 | 48 | 47 | 42 | 51 | 48 | 36 |