YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.83 | 42.13 | 29.22 | c | 28.39 | 38.39 | h | |||
1958 | 26.73 | a | 31.39 | 30.00 | a | 37.63 | 47.35 | 49.10 | 52.97 | 59.45 | 50.37 | 39.65 | 26.23 | 23.19 | 39.51 | |||||||||||
1959 | 20.52 | 22.50 | 26.45 | 34.83 | 39.45 | 53.17 | 61.03 | 58.48 | 51.03 | 42.07 | a | 30.90 | 28.10 | 39.04 | ||||||||||||
1960 | 19.94 | 24.31 | c | 34.27 | a | 39.96 | b | 46.23 | 56.30 | 60.52 | 57.47 | a | 53.77 | 38.81 | 30.23 | 23.03 | 40.40 | |||||||||
1961 | 23.52 | 26.89 | 30.29 | 37.20 | 41.87 | 57.40 | 60.52 | 56.32 | 44.27 | 36.97 | 25.62 | a | 19.00 | 38.32 | ||||||||||||
1962 | 19.61 | c | 26.75 | 23.77 | 38.40 | 38.10 | 48.93 | 53.52 | 53.71 | 49.40 | 41.10 | 31.60 | 23.84 | 37.39 | ||||||||||||
1963 | 14.13 | 29.85 | a | 25.81 | 30.60 | 44.76 | f | 46.43 | 53.87 | 56.32 | 50.00 | 41.23 | 28.10 | 19.71 | 36.00 | a | ||||||||||
1964 | 16.42 | 19.17 | 23.32 | 32.97 | 39.39 | 48.93 | 56.94 | 54.58 | 46.00 | 42.26 | 23.40 | 21.68 | 35.42 | |||||||||||||
1965 | 24.77 | a | 21.89 | 23.90 | 33.10 | 37.97 | 45.13 | 54.52 | 52.23 | 41.07 | 39.65 | 31.03 | 21.87 | 35.59 | ||||||||||||
1966 | 17.77 | 19.96 | 29.77 | 35.63 | 42.48 | 49.57 | 53.23 | 55.00 | 47.57 | 37.68 | 27.87 | 19.65 | 36.35 | |||||||||||||
1967 | 21.97 | 29.11 | 34.42 | 32.23 | 47.39 | 53.43 | 62.81 | 59.03 | 51.07 | 41.87 | a | 32.90 | 15.87 | p | 42.38 | a | ||||||||||
1968 | 21.34 | b | 32.07 | a | 35.42 | 34.34 | a | 44.39 | 51.57 | 55.86 | c | 50.62 | b | 46.44 | e | 35.59 | b | 26.60 | 14.45 | 37.39 | ||||||
1969 | 24.14 | b | 24.25 | d | 25.25 | c | 35.28 | a | 44.41 | b | 50.19 | c | ----- | z | 59.61 | 49.68 | b | 33.10 | b | 28.04 | d | 24.25 | c | 36.20 | a | |
1970 | 21.62 | b | 28.14 | 28.32 | c | 30.73 | d | 43.11 | d | 57.00 | d | 61.87 | 61.97 | 48.04 | c | 39.48 | b | 35.00 | 25.34 | b | 40.05 | |||||
1971 | 24.83 | a | 27.14 | 31.65 | e | 38.07 | 42.00 | 53.76 | a | 60.21 | c | 61.13 | 49.81 | d | 39.13 | a | 29.30 | c | 22.13 | 39.93 | ||||||
1972 | 21.63 | a | 25.66 | 38.04 | c | 38.82 | b | 48.16 | 56.07 | c | 63.18 | c | 59.94 | 52.88 | d | 44.33 | d | 30.89 | b | 21.75 | c | 41.78 | ||||
1973 | 20.39 | c | 31.46 | 32.36 | c | 38.69 | a | 48.77 | a | 55.97 | a | 59.94 | 55.07 | b | 47.73 | 40.61 | 28.64 | b | 28.18 | c | 40.65 | |||||
1974 | 21.83 | a | 25.92 | c | 35.35 | e | 36.83 | 48.19 | d | 57.59 | c | 59.41 | d | 58.28 | b | 52.65 | d | 45.52 | d | 34.31 | d | 23.07 | a | 41.58 | ||
1975 | 22.35 | e | 26.19 | a | 31.00 | e | 31.96 | d | 42.79 | c | 51.52 | e | 58.64 | c | 55.93 | d | 54.40 | 39.61 | 30.69 | d | 28.21 | b | 39.44 | |||
1976 | 26.14 | b | 29.83 | 27.81 | d | 35.85 | d | 48.30 | d | 52.78 | c | 61.60 | a | 55.07 | d | 56.19 | c | 43.61 | 35.26 | c | 25.71 | 41.51 | ||||
1977 | 24.92 | e | 30.62 | d | 25.41 | d | 40.11 | c | 40.58 | e | 56.81 | d | 61.12 | e | 61.26 | d | 52.65 | d | 46.23 | e | 33.70 | c | 30.48 | d | 41.99 | |
1978 | 30.00 | e | 30.46 | d | 37.35 | e | 38.20 | e | 42.67 | d | 53.04 | c | 58.68 | f | 57.78 | d | 51.23 | d | 47.92 | e | 33.04 | d | 21.33 | d | 40.27 | a |
1979 | 21.78 | d | 23.84 | c | 34.26 | d | 37.12 | e | 45.63 | d | 52.62 | d | 58.65 | e | 58.04 | d | 55.96 | e | 45.96 | d | 29.85 | c | 27.43 | a | 40.93 | |
1980 | 29.52 | 32.76 | 30.32 | 39.07 | 43.90 | b | 51.50 | 59.48 | 56.06 | 51.33 | 41.35 | 31.90 | 30.03 | 41.44 | ||||||||||||
1981 | 29.48 | 28.54 | 32.10 | 41.13 | 46.55 | 56.90 | 60.58 | 57.29 | 50.27 | 40.03 | 34.69 | a | 27.74 | 42.11 | ||||||||||||
1982 | 24.25 | g | 28.23 | b | 33.65 | e | 37.48 | c | 46.93 | c | 54.67 | c | 57.83 | b | 59.14 | b | 51.13 | g | 38.89 | d | 28.88 | d | 24.80 | f | 42.86 | c |
1983 | 26.04 | e | 30.80 | c | 34.52 | b | 34.85 | d | 45.15 | d | 52.70 | c | 58.33 | d | 59.18 | c | 55.24 | e | 43.55 | b | 32.35 | g | 26.92 | e | 42.48 | a |
1984 | 26.76 | f | 27.08 | d | 32.87 | a | 35.92 | d | 51.33 | a | 54.40 | 61.00 | d | 58.79 | b | 50.72 | a | 33.88 | e | 29.00 | c | 26.21 | c | 41.93 | a | |
1985 | 26.46 | c | 27.57 | g | 30.60 | f | 44.21 | a | 45.15 | d | 54.33 | 61.00 | f | 53.88 | e | 44.68 | b | 39.26 | d | 28.67 | c | 28.59 | b | 40.58 | c | |
1986 | 29.68 | 31.81 | b | 38.26 | 38.21 | a | 45.61 | 56.07 | 57.67 | a | 61.21 | b | 47.14 | b | 40.28 | b | 31.66 | a | 27.11 | c | 42.06 | |||||
1987 | 24.43 | a | 30.04 | a | 30.40 | a | 40.41 | a | 48.00 | a | 58.34 | a | 58.07 | a | 58.93 | a | 54.21 | a | 47.33 | a | 33.82 | b | 24.64 | c | 42.39 | |
1988 | 25.11 | d | 30.59 | 30.94 | 40.55 | a | 46.38 | b | 57.47 | 63.61 | 59.03 | 51.71 | b | 48.13 | a | 32.07 | 25.74 | 42.61 | ||||||||
1989 | 22.37 | d | 25.43 | 35.58 | 44.50 | 47.58 | 55.60 | 62.77 | 57.90 | 52.90 | a | 44.03 | 34.73 | 27.26 | 42.55 | |||||||||||
1990 | 25.35 | 26.23 | b | 36.00 | 43.60 | 45.77 | 56.43 | 62.60 | a | 58.67 | a | 55.36 | b | 42.20 | a | 31.07 | a | 17.58 | 41.74 | |||||||
1991 | 24.35 | 32.15 | a | 30.67 | a | 35.27 | 43.39 | 50.77 | 61.97 | a | 60.00 | 56.45 | a | 47.70 | a | 32.40 | 25.19 | 41.69 | ||||||||
1992 | 24.30 | a | 34.00 | a | 36.20 | a | 44.33 | 50.68 | ----- | z | 59.61 | 61.83 | a | 54.39 | b | 47.84 | 31.04 | c | 23.24 | b | 42.50 | a | ||||
1993 | 28.14 | b | 29.12 | b | 38.77 | 40.80 | 47.97 | 54.90 | 57.60 | a | 59.07 | a | 52.83 | a | 44.33 | a | 30.00 | c | 25.69 | b | 42.43 | |||||
1994 | 27.79 | b | 25.96 | b | 37.90 | 41.67 | 48.19 | 59.70 | 63.58 | 63.45 | 56.20 | 41.55 | 27.04 | b | 28.42 | 43.45 | ||||||||||
1995 | 28.97 | b | 35.54 | b | 35.41 | b | 37.79 | a | 44.07 | a | 52.50 | b | 59.57 | a | 61.34 | b | 55.45 | a | 43.68 | c | 36.66 | a | 29.60 | a | 43.38 | |
1996 | 27.03 | 33.77 | c | 34.21 | b | 40.52 | c | 48.43 | a | 56.93 | b | 65.16 | 62.45 | b | 52.28 | a | 41.33 | d | 34.03 | a | 28.04 | c | 43.68 | |||
1997 | 26.87 | a | 29.67 | a | 36.06 | 37.70 | 52.32 | 54.00 | c | 58.70 | a | 59.80 | a | 56.29 | b | 42.70 | h | 34.43 | 27.48 | 43.03 | a | |||||
1998 | 28.52 | 30.60 | c | 33.53 | a | 37.97 | a | 43.81 | 50.63 | 62.45 | 63.06 | 53.37 | 40.87 | 32.33 | 26.42 | 41.96 | ||||||||||
1999 | 28.16 | 29.61 | 33.65 | 37.07 | 45.19 | 53.30 | 61.26 | 60.71 | 54.07 | 44.10 | 35.37 | 27.93 | a | 42.53 | ||||||||||||
2000 | 30.65 | 32.07 | 35.16 | 44.07 | 52.13 | 59.33 | 60.43 | a | 63.23 | 53.13 | 45.23 | 28.10 | 28.81 | 44.36 | ||||||||||||
2001 | 27.77 | 29.23 | b | 36.32 | 39.80 | 52.74 | 55.83 | 61.77 | 61.90 | 56.40 | 46.77 | 37.33 | 24.03 | a | 44.16 | |||||||||||
2002 | 24.84 | 28.93 | 31.13 | 43.60 | 48.00 | 59.20 | 66.74 | 60.58 | 57.12 | e | 43.88 | f | 33.88 | f | 27.81 | 44.79 | b | |||||||||
2003 | 32.39 | 30.29 | 34.83 | a | 37.83 | 49.58 | 58.00 | 66.20 | a | 63.13 | 55.77 | 49.23 | 31.69 | a | 26.07 | c | 44.58 | |||||||||
2004 | 24.83 | a | 27.48 | 41.42 | 40.83 | 48.52 | 57.43 | 62.23 | 59.97 | 51.57 | 43.65 | 32.70 | 29.16 | 43.32 | ||||||||||||
2005 | ----- | z | ----- | z | 35.71 | 38.50 | 48.35 | 53.13 | 64.84 | 60.03 | 53.40 | 45.61 | 35.13 | 27.68 | 46.24 | b | ||||||||||
2006 | 26.87 | 29.18 | 30.84 | 39.45 | a | 52.39 | 59.40 | 66.00 | ----- | z | ----- | z | 43.48 | 33.60 | 26.43 | a | 40.76 | b | ||||||||
2007 | ----- | z | 29.64 | ----- | z | 43.20 | 49.39 | 56.33 | 64.71 | ----- | z | 54.93 | 43.03 | 37.07 | 24.25 | c | 44.73 | c | ||||||||
2008 | 24.53 | a | 28.69 | 33.84 | 36.93 | 44.73 | a | 55.30 | 64.84 | 62.75 | c | 56.13 | 42.87 | a | 38.00 | 23.77 | i | 44.42 | a | |||||||
2009 | 30.48 | 29.21 | 33.35 | 37.73 | 53.20 | a | 54.23 | 64.32 | 60.94 | 56.43 | 40.71 | 34.57 | 23.68 | 43.24 | ||||||||||||
2010 | 26.63 | a | 29.74 | a | 33.23 | a | 37.73 | 42.73 | a | 60.00 | x | 64.13 | a | 59.42 | 54.10 | j | 45.60 | a | 30.10 | a | ----- | z | 41.04 | c | ||
2011 | ----- | z | 24.68 | c | 32.33 | g | 37.85 | d | 42.19 | d | 51.77 | 59.58 | 62.35 | 55.37 | 43.68 | 31.17 | 24.74 | 43.34 | b | |||||||
2012 | 27.32 | 29.62 | 32.58 | 40.30 | 50.81 | 57.10 | 62.45 | 64.55 | 56.60 | 45.39 | 34.93 | 29.28 | b | 44.24 | ||||||||||||
2013 | 21.58 | s | 28.68 | 36.90 | a | 41.45 | a | 48.65 | 58.58 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.85 | g | ||
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.00 | m | 32.94 | 32.94 | k | |
2015 | 33.94 | 33.93 | 40.58 | 41.23 | 47.03 | 59.83 | 61.35 | 63.13 | 57.20 | 48.23 | 32.67 | 26.87 | 45.50 | |||||||||||||
2016 | 27.00 | 32.79 | 39.32 | ----- | z | ----- | z | ----- | z | 64.10 | 60.58 | ----- | z | 47.58 | ----- | z | 30.00 | 43.05 | e | |||||||
2017 | 31.03 | 34.18 | 41.23 | 41.37 | 48.90 | 62.43 | 67.16 | 62.32 | ----- | z | 44.45 | 37.68 | b | ----- | z | 47.08 | b | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.23 | 28.73 | 33.07 | 38.34 | 46.23 | 54.58 | 60.78 | 59.18 | 52.31 | 42.64 | 31.73 | 25.57 | 41.30 | |||||||||||||
S.D. | 4.01 | 3.47 | 4.39 | 3.37 | 3.69 | 3.54 | 3.45 | 3.04 | 3.70 | 3.61 | 3.25 | 3.53 | 2.49 | |||||||||||||
SKEW | -0.38 | -0.60 | -0.40 | -0.22 | -0.22 | -0.39 | -0.43 | -0.64 | -0.88 | -0.38 | -0.17 | -0.78 | -0.76 | |||||||||||||
MAX | 33.94 | 35.54 | 41.42 | 44.50 | 53.20 | 62.43 | 67.16 | 64.55 | 57.20 | 49.23 | 38.00 | 32.94 | 45.50 | |||||||||||||
MIN | 14.13 | 19.17 | 23.32 | 30.60 | 37.97 | 45.13 | 52.97 | 50.62 | 41.07 | 33.10 | 23.40 | 14.45 | 35.42 | |||||||||||||
YRS | 53 | 57 | 56 | 58 | 57 | 56 | 55 | 56 | 54 | 57 | 56 | 55 | 39 |