YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.15 | j | 76.62 | b | 70.86 | j | 61.70 | 50.77 | 42.93 | a | 34.52 | 53.31 | g | |||
1954 | 35.65 | 44.11 | 40.48 | h | 50.47 | 57.82 | c | 64.04 | g | 76.43 | a | 70.48 | 64.27 | 54.13 | 44.73 | 36.76 | b | 53.48 | b | |||||||
1955 | 35.58 | 33.57 | 39.45 | 44.85 | d | 53.74 | d | 62.25 | b | 69.04 | c | 72.42 | 61.50 | 53.90 | 41.58 | d | 36.74 | l | 51.63 | a | ||||||
1956 | 39.45 | 33.14 | 39.68 | 48.10 | 58.32 | 63.46 | b | 72.71 | 68.71 | 64.53 | 49.94 | 38.61 | g | 38.32 | 52.40 | a | ||||||||||
1957 | ----- | z | 48.36 | q | 45.97 | a | 52.63 | 56.81 | 71.40 | 76.35 | 75.35 | 64.90 | 54.90 | 41.13 | 39.45 | 57.89 | b | |||||||||
1958 | 37.65 | 42.00 | 41.74 | 45.93 | 60.07 | a | 67.90 | 71.52 | 77.45 | 67.93 | 57.61 | 42.50 | 38.74 | 54.25 | ||||||||||||
1959 | 37.00 | 37.86 | 43.29 | 52.90 | 59.32 | 71.03 | 79.29 | 73.81 | 63.40 | 54.65 | 43.80 | 39.52 | 54.66 | |||||||||||||
1960 | 31.61 | 35.14 | 44.29 | 49.03 | 55.10 | 68.87 | 74.55 | 74.68 | 67.63 | 53.55 | 42.73 | 34.68 | 52.65 | |||||||||||||
1961 | 34.55 | 39.11 | 40.71 | 49.73 | 57.52 | 70.77 | 76.87 | 73.65 | 62.60 | 51.03 | 42.33 | 35.68 | 52.88 | |||||||||||||
1962 | 35.97 | 41.14 | 38.48 | 52.97 | 55.68 | 64.70 | 73.32 | 75.29 | 69.37 | 56.13 | 46.10 | 39.42 | 54.05 | |||||||||||||
1963 | 33.23 | 45.04 | 41.26 | 46.93 | 59.94 | 64.63 | 75.97 | 75.97 | 67.47 | 57.16 | 45.57 | 34.90 | 54.00 | |||||||||||||
1964 | 32.45 | 33.52 | 40.03 | 48.13 | 56.03 | 66.90 | 75.58 | 73.42 | 64.87 | 57.94 | 39.77 | 36.65 | 52.11 | |||||||||||||
1965 | ----- | z | 38.61 | 42.16 | 47.97 | 55.20 | a | 61.57 | 72.71 | 74.32 | 61.03 | 55.03 | 46.93 | 38.71 | 54.02 | a | ||||||||||
1966 | 32.55 | 34.25 | 42.13 | 48.97 | 60.00 | 66.53 | 74.19 | 77.71 | 68.93 | 53.23 | 44.07 | 38.74 | 53.44 | |||||||||||||
1967 | 36.71 | 38.12 | d | 45.94 | 43.90 | 57.65 | 65.77 | 78.52 | 75.42 | 68.13 | 56.00 | 46.20 | 34.48 | 53.90 | ||||||||||||
1968 | 36.48 | 44.86 | 44.32 | 48.30 | 57.19 | 66.73 | 74.45 | 71.77 | 66.23 | 54.58 | 44.47 | 32.35 | 53.48 | |||||||||||||
1969 | 43.65 | 39.61 | 41.30 | a | 50.23 | 61.03 | 68.17 | 77.52 | 79.39 | 69.55 | a | 52.90 | 47.07 | a | 38.39 | 55.73 | ||||||||||
1970 | 35.16 | 42.93 | a | 44.10 | 47.03 | 60.65 | 69.50 | 78.55 | 78.48 | 63.90 | 53.55 | 46.07 | 37.35 | 54.77 | ||||||||||||
1971 | 37.47 | a | 39.82 | 42.63 | a | 48.20 | 56.19 | 66.43 | 77.87 | 75.19 | 66.47 | 51.90 | 42.63 | 36.81 | 53.47 | |||||||||||
1972 | 33.69 | b | 39.15 | b | 48.10 | 50.77 | d | 61.86 | b | 68.52 | a | 76.48 | 74.10 | b | 65.60 | 54.48 | 39.63 | 33.55 | 53.83 | |||||||
1973 | 32.65 | 39.96 | 38.84 | 43.22 | c | 57.17 | a | 58.93 | a | 73.96 | c | 69.64 | c | 58.53 | 52.20 | a | 41.00 | 36.19 | 50.19 | |||||||
1974 | 33.73 | a | 36.54 | 44.71 | 46.48 | a | 60.61 | c | 68.00 | a | 70.28 | b | 66.74 | 69.21 | a | 55.40 | a | 43.04 | b | 33.28 | b | 52.33 | ||||
1975 | 34.22 | d | 35.21 | 39.00 | e | 43.10 | 52.96 | e | 65.65 | d | 76.67 | a | 69.83 | a | 66.23 | 51.06 | 38.80 | 36.67 | a | 50.78 | ||||||
1976 | 35.37 | d | 42.52 | 39.08 | e | 44.76 | a | 59.94 | 65.43 | 77.08 | e | 68.52 | 66.04 | d | 52.81 | d | 42.13 | 32.48 | 52.18 | |||||||
1977 | 36.23 | a | 37.41 | a | 36.42 | 50.50 | 53.43 | a | 67.81 | c | 76.68 | 76.00 | a | 66.03 | a | 57.33 | a | 45.03 | a | 41.14 | c | 53.67 | ||||
1978 | 39.21 | b | 40.96 | 47.71 | 47.34 | a | 53.14 | b | 66.73 | 71.93 | a | 74.19 | 60.31 | a | 58.80 | a | 43.43 | 31.30 | a | 52.92 | ||||||
1979 | 33.06 | 34.74 | a | 41.48 | 45.32 | b | 57.23 | a | 65.18 | b | 72.32 | 69.13 | a | 66.73 | 55.06 | 38.50 | 37.68 | 51.37 | ||||||||
1980 | 43.32 | 42.90 | 41.34 | b | 47.63 | 55.29 | 64.17 | 75.13 | 74.29 | 65.60 | 53.68 | 43.33 | 40.97 | 53.97 | ||||||||||||
1981 | 39.23 | a | 38.48 | a | 43.65 | 53.90 | 60.03 | 73.50 | 80.19 | 76.13 | 68.83 | 53.10 | 44.60 | 37.68 | 55.78 | |||||||||||
1982 | 35.03 | 41.25 | 43.93 | b | 49.53 | 57.06 | 64.97 | a | 75.29 | 76.03 | a | 66.27 | 50.65 | 42.48 | a | 35.14 | b | 53.14 | ||||||||
1983 | 36.90 | 41.64 | 45.55 | 47.00 | b | 56.32 | 67.27 | 77.42 | 72.87 | 72.10 | 57.23 | 46.28 | a | 39.71 | 55.02 | |||||||||||
1984 | 38.81 | 36.97 | 43.79 | b | 48.57 | 63.65 | 70.17 | 77.74 | 74.26 | 68.13 | 50.03 | 41.60 | 38.30 | a | 54.33 | |||||||||||
1985 | 35.39 | 37.18 | 41.58 | 50.97 | a | 59.84 | 67.03 | 76.52 | 73.61 | 60.41 | a | 54.32 | 42.23 | 37.97 | 53.09 | |||||||||||
1986 | 40.23 | 43.39 | 46.16 | 51.13 | 58.26 | 69.97 | 74.61 | 77.16 | 61.80 | 51.23 | 43.67 | 36.87 | 54.54 | |||||||||||||
1987 | 34.55 | 39.64 | 40.61 | 52.47 | 59.39 | 66.90 | 71.71 | 74.03 | 63.93 | 55.61 | 43.20 | 32.16 | 52.85 | |||||||||||||
1988 | 35.42 | 39.69 | 40.16 | 50.40 | 57.84 | 70.40 | 78.68 | 72.81 | 63.83 | 59.74 | 45.10 | a | 37.13 | 54.27 | ||||||||||||
1989 | 37.84 | 39.93 | a | 48.52 | 57.40 | 62.26 | 70.17 | 78.97 | 76.03 | 66.93 | 54.42 | 46.67 | 37.42 | 56.38 | ||||||||||||
1990 | 36.68 | 38.56 | a | 46.39 | 53.23 | 60.35 | 69.90 | 77.06 | 73.87 | 68.37 | 55.39 | 44.47 | 34.64 | f | 56.75 | a | ||||||||||
1991 | 36.65 | 44.68 | 40.97 | 48.37 | 54.39 | 65.63 | 74.81 | 74.77 | 68.33 | 57.94 | 45.23 | 38.87 | 54.22 | |||||||||||||
1992 | 38.81 | 45.34 | 46.13 | 51.27 | 61.13 | 66.90 | 74.74 | 76.10 | 67.40 | 57.65 | 42.07 | 36.48 | 55.33 | |||||||||||||
1993 | 41.23 | 40.93 | 45.45 | 48.63 | 59.10 | 65.43 | 74.90 | 75.00 | 64.57 | 55.61 | 42.03 | 36.58 | 54.12 | |||||||||||||
1994 | 37.23 | 38.71 | 47.80 | a | 51.76 | a | 59.03 | 72.80 | 76.23 | 78.74 | 69.67 | 52.58 | 39.33 | 39.35 | 55.27 | |||||||||||
1995 | 40.00 | 45.79 | 44.58 | 48.20 | 56.52 | 66.90 | 74.29 | 77.84 | 71.27 | 54.65 | 48.57 | 40.65 | 55.77 | |||||||||||||
1996 | 39.23 | 44.50 | a | 47.00 | 53.07 | 62.23 | 69.93 | 81.42 | 79.23 | 68.30 | 56.19 | 47.57 | 41.74 | 57.53 | ||||||||||||
1997 | 41.77 | a | 40.29 | 48.13 | h | ----- | z | 69.65 | k | 70.53 | 73.52 | 78.26 | 72.90 | 53.84 | 44.93 | 37.39 | 57.05 | c | ||||||||
1998 | 39.00 | 40.89 | 44.00 | 46.57 | 55.13 | 64.73 | 77.42 | 77.00 | 67.50 | 52.97 | 42.73 | 38.90 | 53.90 | |||||||||||||
1999 | 39.84 | 40.46 | 45.42 | 47.73 | 58.39 | 68.93 | 76.26 | 74.77 | 68.53 | 56.29 | 46.93 | 39.45 | 55.25 | |||||||||||||
2000 | 40.45 | 43.86 | 46.10 | 54.67 | 65.16 | 73.03 | 78.16 | 77.74 | 67.23 | 56.26 | 40.37 | 39.90 | 56.91 | |||||||||||||
2001 | 37.97 | 39.93 | 45.90 | 50.43 | 63.65 | 70.80 | 75.45 | 76.55 | 68.27 | 58.19 | 47.23 | 35.55 | 55.83 | |||||||||||||
2002 | 37.10 | 39.14 | 42.42 | 53.47 | 58.37 | a | 69.63 | 78.88 | g | 75.74 | 68.60 | 54.42 | 47.40 | 37.87 | 53.11 | a | ||||||||||
2003 | 43.68 | 41.50 | 44.71 | 49.63 | 61.13 | 70.20 | 78.77 | 77.26 | 70.10 | 61.19 | 41.20 | 37.61 | 56.42 | |||||||||||||
2004 | 37.97 | 37.97 | 51.19 | 52.70 | 61.52 | 67.57 | 75.55 | 75.32 | 64.97 | 54.39 | 42.03 | 39.52 | 55.06 | |||||||||||||
2005 | 40.68 | 41.54 | 42.26 | 46.10 | 58.19 | 66.23 | d | 74.66 | b | 73.43 | a | 62.86 | b | 56.71 | 45.37 | 33.82 | n | 55.27 | a | |||||||
2006 | 35.46 | e | 38.85 | a | 37.54 | e | 49.20 | 59.52 | 67.68 | h | 81.00 | h | 74.23 | 65.88 | e | 54.43 | c | 44.77 | 34.86 | b | 49.47 | b | ||||
2007 | 33.26 | 41.71 | 47.38 | b | 54.07 | c | 62.81 | 67.00 | k | 79.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.07 | f | ||||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | 41.47 | a | 48.53 | 64.87 | 68.43 | 78.81 | 70.74 | 70.40 | 52.26 | 44.17 | 34.52 | 57.42 | b | |||||||||
2010 | 39.29 | 41.46 | 42.52 | 47.33 | 55.35 | 69.17 | 80.10 | 74.74 | 66.17 | 57.90 | 43.27 | 42.23 | 54.96 | |||||||||||||
2011 | 37.52 | 36.75 | 46.10 | 52.23 | 55.81 | 67.73 | 77.48 | 78.84 | 69.33 | 56.74 | 43.23 | 36.03 | 54.82 | |||||||||||||
2012 | 37.13 | 40.17 | 44.84 | 53.10 | 63.39 | h | 70.70 | 76.58 | 78.03 | 70.50 | 57.32 | 46.43 | 38.84 | 55.79 | a | |||||||||||
2013 | 35.43 | a | 37.48 | a | 47.84 | 52.13 | 62.74 | 71.83 | 80.07 | b | 74.35 | 66.72 | a | 52.10 | 45.97 | 38.48 | 55.43 | |||||||||
2014 | 41.81 | d | 43.96 | d | 48.62 | b | 51.67 | i | 61.96 | c | 70.58 | d | 78.88 | f | 73.73 | e | 69.56 | c | 58.34 | b | 44.97 | a | 41.72 | b | 55.53 | b |
2015 | 40.62 | b | 43.74 | i | 50.00 | h | 51.32 | e | 58.30 | h | 71.40 | e | ----- | z | 77.67 | a | ----- | z | 56.90 | u | 41.79 | f | 33.70 | d | 54.94 | g |
2016 | 37.58 | e | 41.83 | f | 44.82 | c | 53.50 | 61.36 | f | 75.27 | d | 79.90 | 75.66 | b | 66.54 | f | 58.90 | b | 46.57 | b | 38.10 | a | 56.70 | c | ||
2017 | 39.87 | 45.15 | a | 48.21 | b | 50.95 | k | 59.26 | 70.37 | 79.00 | d | 76.52 | 67.44 | e | 56.81 | j | 50.08 | f | 43.25 | w | 60.73 | d | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.27 | 40.00 | 43.63 | 49.57 | 58.66 | 68.03 | 76.13 | 74.76 | 66.49 | 54.89 | 43.80 | 37.28 | 54.15 | |||||||||||||
S.D. | 2.92 | 3.21 | 3.18 | 3.07 | 2.96 | 3.05 | 2.62 | 2.80 | 3.05 | 2.55 | 2.38 | 2.54 | 1.53 | |||||||||||||
SKEW | 0.21 | -0.20 | -0.06 | 0.01 | 0.09 | -0.32 | -0.41 | -0.73 | -0.43 | 0.08 | -0.21 | -0.32 | -0.29 | |||||||||||||
MAX | 43.68 | 45.79 | 51.19 | 57.40 | 65.16 | 75.27 | 81.42 | 79.39 | 72.90 | 61.19 | 48.57 | 42.23 | 57.53 | |||||||||||||
MIN | 31.61 | 33.14 | 36.42 | 43.10 | 52.96 | 58.93 | 69.04 | 66.74 | 58.53 | 49.94 | 38.50 | 31.30 | 50.19 | |||||||||||||
YRS | 60 | 59 | 60 | 60 | 59 | 60 | 60 | 62 | 61 | 61 | 60 | 59 | 46 |