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 | 39.05 | t | 34.02 | 34.02 | k | |
1956 | 32.89 | 28.50 | 40.95 | 46.18 | 55.58 | 60.70 | 67.81 | 66.24 | 61.29 | d | 46.63 | 35.62 | 30.61 | 47.75 | ||||||||||||
1957 | 20.11 | 35.75 | 39.84 | 43.45 | a | 51.70 | a | 60.70 | 67.02 | 66.65 | 59.58 | 45.05 | a | 34.97 | 34.81 | 46.63 | ||||||||||
1958 | 31.32 | 40.82 | 35.40 | 43.95 | 60.56 | 61.90 | a | 68.77 | 72.82 | 61.37 | 52.92 | a | 39.95 | 38.25 | a | 50.67 | ||||||||||
1959 | 35.00 | 32.71 | 38.91 | c | 49.10 | a | 49.11 | 65.02 | 72.08 | 66.93 | a | 58.02 | b | 52.76 | 40.39 | b | 28.27 | a | 49.03 | |||||||
1960 | 24.55 | b | 31.79 | 43.66 | 47.07 | 51.08 | 64.72 | 73.94 | 66.68 | a | 61.88 | 50.30 | a | 38.07 | 30.40 | a | 48.68 | |||||||||
1961 | 32.87 | 38.32 | 39.48 | 44.85 | 53.80 | d | 67.98 | 72.03 | 73.05 | 54.36 | a | 48.38 | a | 36.55 | a | 28.40 | 49.17 | |||||||||
1962 | 21.58 | 31.30 | 35.35 | a | 49.25 | 50.48 | 60.73 | 66.29 | 66.24 | 60.22 | 48.52 | 38.65 | 33.03 | b | 46.80 | |||||||||||
1963 | 25.36 | b | 40.41 | a | 35.72 | a | 40.58 | 55.47 | a | 58.05 | 65.52 | a | 67.57 | a | 63.38 | 53.90 | 39.08 | 29.52 | 47.88 | |||||||
1964 | 29.24 | 32.21 | 35.60 | a | 42.38 | 51.28 | a | 58.72 | 69.79 | b | 65.83 | b | 57.78 | 52.52 | 37.05 | 33.40 | a | 47.15 | ||||||||
1965 | 31.47 | a | 36.67 | a | 35.86 | b | 47.12 | 48.88 | b | 59.38 | 68.31 | 64.62 | a | 52.45 | a | 53.26 | 40.24 | a | 28.41 | b | 47.22 | |||||
1966 | 29.63 | 32.80 | r | 40.42 | 46.68 | b | 59.87 | 60.72 | a | 70.05 | 69.71 | b | 63.78 | 50.48 | a | 42.12 | a | 31.83 | a | 51.39 | a | |||||
1967 | 34.62 | a | 38.77 | 39.63 | 38.93 | c | 53.85 | 60.57 | a | 73.90 | 73.71 | 64.93 | 51.26 | 40.33 | a | 29.42 | a | 49.99 | ||||||||
1968 | 30.52 | a | 38.93 | 42.77 | 41.33 | a | 52.25 | a | 61.63 | 71.81 | 62.44 | 59.75 | 49.42 | a | 38.32 | 30.11 | 48.27 | |||||||||
1969 | 32.41 | c | 32.27 | 37.81 | 47.48 | 55.66 | 61.52 | 70.02 | a | 69.34 | 62.22 | 45.05 | a | 38.68 | 34.66 | 48.93 | ||||||||||
1970 | 34.26 | 38.77 | 37.08 | 38.98 | 53.07 | b | 63.36 | a | 70.26 | 71.27 | 55.85 | 46.26 | 40.15 | 27.87 | 48.10 | |||||||||||
1971 | 34.24 | 35.68 | 36.89 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.80 | e | 25.58 | g | 35.90 | h | |||
1972 | 28.38 | b | 35.84 | 43.28 | a | 42.52 | 55.63 | a | 63.95 | 69.50 | b | 67.85 | a | 54.13 | 48.32 | 37.45 | ----- | z | 49.71 | a | ||||||
1973 | 27.85 | 35.70 | 36.65 | 42.16 | b | 57.27 | 64.57 | 72.42 | 68.74 | 58.87 | 49.47 | 39.08 | 35.78 | a | 49.05 | |||||||||||
1974 | 28.31 | 34.95 | 40.02 | 44.87 | 53.73 | c | 68.14 | a | ----- | z | 67.45 | 61.43 | 47.42 | a | 39.03 | 29.69 | 46.82 | a | ||||||||
1975 | 29.08 | 31.55 | 36.19 | 36.34 | a | 51.18 | a | 58.25 | 71.29 | ----- | z | ----- | z | ----- | z | 37.24 | a | 36.27 | a | 43.04 | c | |||||
1976 | 32.90 | 35.83 | b | 34.79 | 43.14 | a | 55.82 | 61.05 | a | 71.19 | 64.00 | a | 59.69 | a | 48.47 | 42.93 | a | 31.21 | 48.42 | |||||||
1977 | 20.53 | 36.36 | 35.23 | a | 49.38 | 48.13 | a | 66.52 | 69.24 | 69.15 | 59.90 | 50.85 | 37.63 | 36.48 | 48.28 | |||||||||||
1978 | 34.62 | a | 36.86 | 44.66 | 44.22 | 49.71 | 61.09 | a | 69.95 | 66.23 | 56.95 | 51.21 | 35.27 | 26.19 | 48.08 | |||||||||||
1979 | 20.34 | 33.04 | 43.31 | 44.87 | 54.73 | 62.63 | 71.56 | 67.48 | 63.35 | 52.67 | b | 32.45 | 34.94 | 48.45 | ||||||||||||
1980 | 29.60 | 37.98 | 36.50 | 48.62 | 54.34 | 58.50 | 70.74 | 65.48 | 60.52 | 49.79 | 38.85 | 34.23 | 48.76 | |||||||||||||
1981 | 30.19 | 35.14 | 39.76 | 48.29 | a | 51.93 | d | 61.67 | 69.47 | 71.65 | a | 61.42 | 46.03 | b | 41.47 | 36.53 | 49.46 | |||||||||
1982 | 30.43 | a | 32.16 | 38.52 | a | 42.08 | 52.66 | 61.07 | a | 68.47 | 70.11 | 57.70 | b | 48.05 | 31.28 | 29.18 | 46.81 | |||||||||
1983 | 33.97 | 37.13 | a | 39.33 | a | 41.33 | a | 52.73 | 60.18 | b | 67.30 | d | 70.31 | 59.57 | g | 51.68 | 39.75 | 27.54 | c | 47.38 | a | |||||
1984 | 20.92 | 30.38 | c | 40.65 | 42.54 | c | 54.58 | f | 57.35 | c | 71.56 | 71.59 | b | 58.39 | b | 45.83 | d | 38.22 | c | 25.04 | c | 45.68 | a | |||
1985 | 24.95 | a | 29.60 | d | 35.17 | e | 50.66 | b | 56.43 | a | 64.91 | c | 74.42 | a | 65.77 | c | 51.67 | f | 46.85 | k | 30.39 | c | 21.63 | d | 45.39 | b |
1986 | 34.60 | 39.32 | c | 45.14 | c | 45.86 | a | 56.30 | d | 68.60 | d | 69.33 | a | 73.09 | d | 52.80 | g | 49.66 | b | 40.02 | c | 27.87 | a | 49.98 | a | |
1987 | 27.76 | d | 33.44 | a | 39.69 | 52.85 | c | 56.98 | c | 65.36 | b | 65.48 | a | 65.91 | c | 60.17 | i | 51.19 | b | 36.02 | 28.40 | 47.55 | a | |||
1988 | 25.52 | b | 36.44 | d | 38.70 | c | 48.42 | d | 55.37 | e | 66.69 | f | 72.75 | a | 68.57 | c | 59.77 | f | 57.42 | f | 38.50 | e | 27.37 | a | 45.74 | c |
1989 | 28.39 | d | 24.15 | b | 42.32 | f | 48.50 | d | 51.67 | d | 62.61 | b | 71.95 | c | 64.09 | d | 58.59 | b | 48.73 | e | 37.96 | c | 31.67 | a | 48.03 | a |
1990 | 30.89 | 29.58 | c | 38.70 | d | 50.35 | c | 52.16 | o | ----- | z | 71.24 | d | 68.71 | e | 64.67 | a | ----- | z | 41.50 | l | 24.04 | d | 47.27 | d | |
1991 | 31.07 | a | 40.78 | c | 38.80 | c | 44.84 | b | 50.16 | f | 58.44 | c | 70.70 | c | 71.02 | c | 63.04 | c | 49.52 | i | 37.80 | b | 29.79 | b | 48.63 | b |
1992 | 34.22 | b | 40.46 | c | 43.69 | 50.88 | 60.03 | 65.04 | f | 68.05 | a | 70.50 | 60.83 | 52.02 | 32.07 | 26.94 | 49.06 | a | ||||||||
1993 | 22.60 | a | 25.57 | 41.92 | 46.02 | b | 58.62 | a | 58.09 | b | 60.27 | a | 63.28 | b | 60.15 | 50.18 | a | 32.64 | a | 32.32 | 45.97 | |||||
1994 | 36.80 | a | 32.59 | 44.44 | 48.07 | a | 56.29 | 63.03 | a | 70.89 | 69.37 | 61.72 | 47.02 | 30.14 | a | 27.84 | 49.02 | |||||||||
1995 | 34.08 | a | 41.75 | 38.85 | a | 43.38 | a | 51.85 | 59.33 | a | 68.63 | a | 66.13 | a | 61.92 | 48.44 | 46.22 | a | 32.94 | 49.46 | ||||||
1996 | 33.90 | a | 34.97 | 42.47 | a | 47.66 | b | 50.44 | 62.57 | 72.52 | a | 69.64 | b | 58.46 | b | 47.79 | c | 40.77 | 35.45 | 49.72 | ||||||
1997 | 32.50 | b | 33.48 | 44.88 | a | 43.57 | b | 57.18 | a | 62.12 | 68.55 | a | 70.00 | 62.21 | a | 48.63 | 40.27 | b | 27.39 | 49.23 | ||||||
1998 | 35.88 | a | 35.12 | 39.87 | 43.27 | 50.55 | a | 57.98 | 73.61 | 72.03 | 64.36 | a | 46.63 | 39.17 | 28.40 | a | 48.91 | |||||||||
1999 | 34.23 | 34.96 | a | 39.31 | 42.25 | 50.94 | 59.42 | 69.23 | a | 68.47 | 58.77 | 52.03 | 42.48 | 30.08 | a | 48.51 | ||||||||||
2000 | 32.74 | 37.66 | 39.00 | 49.82 | 55.68 | a | 64.57 | 69.63 | 70.27 | 58.17 | 45.90 | b | 30.87 | 28.92 | 48.60 | |||||||||||
2001 | 24.79 | 30.04 | 41.31 | 42.32 | 57.40 | 62.67 | 68.87 | a | 73.82 | 64.41 | a | 54.44 | f | 40.70 | b | 31.62 | c | 48.90 | a | |||||||
2002 | 32.40 | a | 35.20 | a | 37.57 | b | 47.88 | a | 54.80 | d | 66.00 | 76.30 | a | 67.02 | a | 61.98 | 46.87 | e | 41.09 | c | 37.73 | g | 51.56 | a | ||
2003 | 38.20 | h | 33.92 | c | 44.29 | b | 44.62 | e | 54.42 | f | 64.18 | m | 77.90 | j | 73.47 | n | 61.88 | i | 57.38 | j | 37.00 | g | 36.02 | k | 40.94 | i |
2004 | 28.58 | l | 31.42 | j | 46.30 | k | 48.72 | g | 55.17 | m | 61.91 | m | 73.65 | 69.47 | 60.26 | k | 45.62 | s | 37.08 | f | 34.00 | m | 71.56 | j | ||
2005 | 30.18 | f | 32.81 | g | 41.15 | k | 46.50 | f | 53.74 | d | 58.39 | g | 73.88 | b | 71.52 | h | 58.02 | b | 52.00 | k | 36.72 | e | 30.71 | e | 50.61 | g |
2006 | 36.71 | j | 33.28 | l | 36.98 | i | 44.21 | m | 57.00 | n | 66.12 | i | 76.79 | c | 68.72 | v | 60.39 | u | 49.12 | s | 39.65 | g | 31.10 | g | 76.79 | k |
2007 | 28.33 | g | 37.08 | h | 45.53 | l | 45.95 | j | 56.82 | l | 65.64 | p | 78.22 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.50 | y | 42.23 | s | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.25 | s | 68.63 | a | 63.38 | 44.02 | 37.08 | 24.84 | b | 47.59 | g | |||
2010 | 35.56 | 34.57 | 36.90 | a | 41.65 | c | 48.07 | c | 59.70 | 69.40 | a | 67.43 | b | 63.31 | a | 51.89 | d | 36.40 | 33.21 | b | 48.17 | |||||
2011 | 31.57 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.57 | 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 | 30.03 | 34.78 | 39.48 | 45.22 | 53.84 | 61.96 | 70.33 | 68.47 | 60.31 | 49.23 | 37.86 | 30.57 | 48.43 | |||||||||||||
S.D. | 4.59 | 3.89 | 3.01 | 3.56 | 3.19 | 2.93 | 2.91 | 2.80 | 2.94 | 2.58 | 3.40 | 3.66 | 1.05 | |||||||||||||
SKEW | -0.76 | -0.48 | 0.28 | -0.11 | 0.14 | 0.51 | -0.54 | 0.02 | -0.59 | -0.06 | -0.50 | 0.00 | -0.35 | |||||||||||||
MAX | 36.80 | 41.75 | 45.14 | 52.85 | 60.56 | 68.60 | 76.79 | 73.82 | 64.93 | 53.90 | 46.22 | 38.25 | 50.67 | |||||||||||||
MIN | 20.11 | 24.15 | 34.79 | 36.34 | 48.07 | 57.35 | 60.27 | 62.44 | 52.45 | 44.02 | 30.14 | 21.63 | 45.97 | |||||||||||||
YRS | 49 | 48 | 48 | 48 | 45 | 44 | 49 | 48 | 43 | 42 | 49 | 48 | 31 |