YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | 52.18 | a | 67.45 | 71.40 | 67.26 | 61.15 | 48.97 | 38.50 | 23.11 | 53.75 | d | |||||||
1954 | 31.11 | 37.04 | 37.39 | 52.62 | 57.56 | 65.23 | 71.16 | 66.34 | 62.47 | 52.94 | 39.18 | 28.56 | 50.13 | |||||||||||||
1955 | 25.06 | 25.46 | 38.16 | 44.60 | 54.18 | 63.93 | 68.32 | 68.60 | 61.25 | 51.44 | 38.33 | 34.61 | 47.83 | |||||||||||||
1956 | 34.76 | 27.09 | 39.68 | 45.72 | 57.81 | 68.42 | 69.15 | 66.21 | 61.87 | 50.02 | 31.82 | 27.82 | 48.36 | |||||||||||||
1957 | 34.44 | 40.68 | 39.71 | 45.78 | 52.68 | 65.68 | 69.50 | 66.66 | 59.57 | 48.92 | 34.05 | 32.81 | 49.21 | |||||||||||||
1958 | 28.11 | 36.71 | 35.35 | 45.78 | 59.06 | 68.30 | 71.02 | 70.35 | 61.32 | 49.92 | 38.00 | 34.00 | 49.83 | |||||||||||||
1959 | 30.02 | 32.45 | 36.97 | 49.98 | 57.05 | 68.50 | 72.00 | 68.05 | 61.33 | 49.76 | 37.58 | 32.45 | 49.68 | |||||||||||||
1960 | 24.76 | 29.57 | 41.73 | 48.10 | 55.16 | 67.85 | 70.53 | 69.45 | 62.97 | 47.98 | 39.58 | 26.53 | 48.68 | |||||||||||||
1961 | 28.84 | 34.80 | 40.08 | 47.58 | 56.90 | 68.40 | 71.73 | 68.47 | 59.33 | 49.13 | 36.30 | 23.40 | 48.75 | |||||||||||||
1962 | 26.35 | 37.04 | 34.55 | 51.10 | 55.90 | 66.28 | 70.23 | 70.10 | 63.13 | 51.60 | 41.43 | 31.61 | 49.94 | |||||||||||||
1963 | 20.16 | 35.41 | 40.19 | 49.45 | 60.94 | 66.18 | 73.35 | 68.27 | 63.73 | 54.02 | 40.67 | 30.13 | 50.21 | |||||||||||||
1964 | 24.97 | 20.41 | 35.19 | 44.90 | 57.42 | 65.15 | 71.47 | 67.77 | 61.52 | 50.97 | 37.65 | 31.06 | 47.37 | |||||||||||||
1965 | 32.92 | 31.54 | 36.71 | 46.43 | 54.16 | 61.92 | 69.06 | 66.76 | 58.80 | 50.35 | 41.53 | 31.05 | 48.44 | |||||||||||||
1966 | 24.57 | a | 27.61 | 39.84 | 48.43 | 59.16 | 65.50 | 72.35 | 67.81 | 60.42 | 49.84 | 41.10 | 29.10 | 48.81 | ||||||||||||
1967 | 28.13 | 35.18 | 44.24 | 48.67 | 55.19 | 64.53 | 72.03 | 66.84 | 60.72 | 50.42 | 41.15 | 23.05 | 49.18 | |||||||||||||
1968 | 25.39 | 37.83 | 39.29 | 44.78 | 55.02 | 66.22 | 69.68 | 64.89 | 59.37 | 50.85 | 36.45 | 27.02 | 48.06 | |||||||||||||
1969 | 36.26 | 33.38 | 34.92 | 49.90 | 57.68 | 64.48 | 72.31 | 70.68 | 61.95 | 49.74 | 37.57 | 33.81 | 50.22 | |||||||||||||
1970 | 28.26 | 36.57 | 38.40 | 43.48 | 56.31 | 63.82 | 71.18 | 68.89 | 60.22 | 45.45 | 39.35 | 30.40 | 48.53 | |||||||||||||
1971 | 28.77 | 33.14 | 41.13 | 45.63 | 54.02 | 66.13 | 71.32 | 67.44 | 59.93 | 47.74 | 37.65 | 29.18 | 48.51 | |||||||||||||
1972 | 30.97 | 36.34 | 45.11 | 49.15 | 55.32 | 65.02 | 70.82 | 67.15 | 61.18 | 51.90 | 35.08 | 30.73 | 49.90 | |||||||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | 44.44 | 45.42 | 59.45 | 69.23 | ----- | z | 66.71 | 58.71 | a | 50.84 | 37.68 | 25.66 | 50.90 | c | ||||||||
1975 | 26.97 | 33.35 | b | 38.35 | 43.02 | 52.47 | b | 63.67 | a | 68.85 | 65.37 | 56.77 | ----- | z | ----- | z | 29.47 | a | 47.83 | b | ||||||
1976 | 28.43 | a | 37.57 | 38.32 | 47.74 | a | 57.16 | 64.72 | 69.71 | 66.71 | 59.58 | 45.82 | 34.47 | 23.65 | 47.82 | |||||||||||
1977 | 24.00 | 33.81 | a | 36.10 | 48.53 | a | 56.08 | a | 67.00 | 70.11 | 69.55 | 63.05 | 52.71 | b | 39.85 | 36.70 | a | 49.79 | ||||||||
1978 | 33.15 | ----- | z | 43.53 | 50.12 | 54.92 | 67.62 | ----- | z | 67.85 | a | 62.38 | 53.61 | 41.72 | 28.71 | 50.36 | b | |||||||||
1979 | 26.31 | 32.82 | 40.44 | d | 48.70 | 56.26 | 65.25 | 71.06 | 68.53 | 64.58 | 54.03 | 34.62 | 32.93 | a | 49.63 | |||||||||||
1980 | 35.77 | 37.66 | a | 38.90 | a | 46.30 | 54.42 | a | 68.57 | 73.44 | 70.11 | 63.23 | 48.17 | a | 38.36 | a | 37.35 | 51.02 | ||||||||
1981 | 34.34 | 36.41 | 39.73 | a | 51.47 | 57.56 | 69.98 | 71.40 | 69.65 | 62.20 | 50.65 | 42.23 | 35.35 | 51.75 | ||||||||||||
1982 | 31.16 | b | 33.71 | 41.53 | a | 48.47 | 55.40 | a | 65.03 | 71.92 | a | 69.03 | 63.10 | 47.42 | 39.48 | c | 30.44 | 49.72 | ||||||||
1983 | 30.00 | a | 34.82 | 41.34 | 44.16 | b | 54.87 | 63.75 | 70.61 | 70.02 | 64.73 | 52.60 | 40.92 | 35.79 | b | 50.30 | ||||||||||
1984 | 28.73 | 34.40 | 40.84 | 46.25 | 62.85 | 66.73 | 72.08 | 69.23 | 63.37 | 46.19 | 39.84 | a | 32.50 | b | 50.25 | |||||||||||
1985 | 30.19 | b | 33.11 | 43.10 | e | 51.75 | 58.31 | 67.62 | 71.24 | 68.37 | 59.00 | 50.98 | 40.53 | 32.13 | 50.53 | |||||||||||
1986 | 36.52 | a | 39.34 | 44.65 | 51.82 | 57.74 | 67.00 | 69.50 | 70.27 | 59.57 | 48.71 | 38.93 | b | 32.60 | b | 51.39 | ||||||||||
1987 | 26.94 | d | 32.70 | 38.00 | 47.77 | 56.19 | 65.17 | 68.68 | 65.04 | r | 61.73 | 54.23 | 38.77 | 29.23 | 47.22 | a | ||||||||||
1988 | 29.16 | 37.66 | 40.66 | 48.73 | 56.69 | 66.57 | 72.48 | 69.26 | 60.85 | 54.74 | 42.67 | 29.58 | 50.75 | |||||||||||||
1989 | 27.45 | b | 36.25 | b | 46.92 | 54.95 | 60.19 | 67.27 | 73.11 | 69.26 | 62.78 | 51.26 | 40.34 | a | 30.73 | 51.71 | ||||||||||
1990 | 27.00 | 34.16 | 43.55 | 51.28 | 57.92 | 71.32 | 71.24 | 67.68 | 64.98 | 52.81 | 40.72 | 24.58 | 50.60 | |||||||||||||
1991 | 27.44 | 36.02 | 39.90 | 49.50 | 57.60 | 64.57 | 71.18 | 70.03 | 63.33 | 53.19 | 39.85 | 32.69 | 50.44 | |||||||||||||
1992 | 26.97 | 37.28 | 42.74 | 54.92 | 58.11 | 65.43 | 69.74 | 68.71 | 63.95 | 53.82 | a | 34.87 | 24.73 | 50.10 | ||||||||||||
1993 | 35.53 | 37.21 | 43.73 | 50.45 | 59.18 | 65.62 | 71.66 | 67.80 | a | 63.07 | 49.22 | h | 37.54 | e | 32.23 | e | 51.27 | a | ||||||||
1994 | 31.14 | c | 29.75 | h | 42.30 | a | 50.21 | b | 58.68 | 70.93 | 73.65 | a | 72.32 | a | 63.00 | d | 49.78 | h | 37.17 | f | 35.70 | d | 55.33 | c | ||
1995 | 33.38 | j | 42.76 | g | 43.76 | f | 47.11 | g | 55.91 | b | 64.93 | 71.09 | c | 72.96 | d | 63.65 | d | 51.52 | f | 43.13 | c | 34.35 | e | 58.00 | e | |
1996 | 33.55 | i | 40.33 | f | 42.00 | e | 49.60 | d | 64.25 | c | 70.38 | e | 73.98 | g | 72.12 | g | 59.29 | d | 49.86 | f | 40.33 | c | 33.22 | f | 54.31 | f |
1997 | 28.62 | j | 33.93 | g | 45.35 | g | 47.65 | c | 60.29 | b | 66.95 | a | 71.65 | d | 70.14 | c | 66.48 | d | 49.91 | i | 39.81 | d | 27.61 | h | 60.42 | e |
1998 | 34.61 | d | 36.59 | l | 42.50 | i | 45.91 | b | 58.59 | b | 66.45 | b | 73.03 | b | 71.72 | a | 66.15 | d | 51.92 | a | 42.65 | c | 34.31 | b | 54.53 | b |
1999 | 37.80 | c | 37.94 | c | 46.93 | d | 47.46 | d | 57.83 | a | 67.57 | b | 71.86 | b | 68.73 | 60.70 | b | 51.39 | d | 43.48 | d | 28.20 | d | 51.66 | ||
2000 | 35.95 | c | 38.24 | d | 41.41 | c | 53.28 | a | 63.36 | c | 69.91 | a | 73.44 | 72.10 | a | 65.20 | g | 51.00 | g | 34.23 | h | 33.04 | d | 53.41 | c | |
2001 | 25.92 | f | 38.07 | g | 42.81 | j | 51.04 | g | 62.07 | c | 69.27 | f | 74.19 | d | 70.12 | g | 65.30 | e | 54.85 | g | 42.55 | b | 31.87 | h | 61.03 | h |
2002 | 30.00 | k | 34.05 | i | 40.44 | g | 53.91 | g | 60.32 | l | 72.46 | g | 74.55 | 71.94 | d | 63.52 | e | 51.77 | g | 40.62 | j | 32.70 | d | 60.68 | h | |
2003 | 40.30 | d | 36.12 | d | 43.62 | a | 50.75 | d | 62.48 | b | 70.78 | 78.87 | a | 73.37 | 65.62 | b | 56.88 | c | 40.93 | i | 32.83 | m | 57.88 | b | ||
2004 | 33.92 | g | 32.06 | l | 48.71 | e | 49.24 | g | 60.91 | b | 69.53 | a | 72.52 | c | 69.71 | 63.11 | c | 50.44 | g | 39.41 | g | 33.54 | f | 64.08 | f | |
2005 | 38.88 | g | 38.48 | g | 41.75 | e | 49.91 | a | 62.03 | a | 67.55 | a | 76.28 | b | 71.92 | a | 65.61 | c | 53.83 | e | 41.48 | f | 33.17 | h | 61.11 | d |
2006 | 34.21 | l | 35.87 | e | 42.72 | f | 53.69 | c | 63.90 | b | 73.10 | a | 74.87 | a | 69.79 | 60.50 | a | 51.68 | f | 41.59 | h | 27.55 | i | 61.67 | e | |
2007 | 25.94 | o | 36.61 | j | 44.87 | h | 51.63 | d | 59.44 | e | 70.13 | c | 75.17 | d | 74.11 | d | 64.47 | j | 53.76 | f | 45.12 | i | 31.17 | p | 66.10 | g |
2008 | 26.61 | m | 38.76 | h | 41.03 | m | 49.33 | r | 57.04 | f | 68.88 | e | 73.50 | d | 73.50 | b | 63.37 | d | 53.61 | 42.45 | k | 32.15 | n | 66.57 | g | |
2009 | 35.16 | f | 38.76 | g | 43.64 | i | 46.83 | l | 62.65 | g | 65.80 | e | 74.62 | f | 70.47 | l | 63.50 | e | 49.98 | d | 41.15 | j | 26.90 | j | 59.76 | i |
2010 | 28.81 | m | 34.27 | o | 38.17 | g | 45.71 | k | 56.37 | h | 70.48 | b | 74.40 | a | 69.36 | b | 66.31 | i | 55.57 | j | 39.05 | i | 38.20 | p | 71.41 | i |
2011 | 28.98 | k | 42.00 | r | 43.53 | n | 50.00 | i | 55.31 | j | 67.17 | o | 73.95 | k | 73.65 | h | 64.17 | j | 53.35 | h | 40.47 | m | 19.41 | t | ----- | z |
2012 | 26.92 | l | 35.84 | j | 42.16 | o | 53.95 | a | 61.94 | 70.88 | 72.90 | 71.10 | 63.70 | ----- | z | ----- | z | ----- | z | 65.74 | f | |||||
2013 | 27.29 | ----- | z | 44.41 | b | 48.50 | i | 59.92 | 72.38 | f | 73.89 | c | 70.77 | 64.38 | 49.33 | a | 41.89 | c | 33.34 | b | 51.69 | c | ||||
2014 | 34.77 | a | 40.66 | 44.25 | a | 51.12 | d | 56.95 | c | 70.45 | a | 74.95 | c | 67.74 | f | 66.19 | c | 54.88 | a | 40.50 | i | 33.88 | g | 54.91 | c | |
2015 | 32.12 | g | 41.00 | a | 44.98 | d | 49.95 | a | 56.05 | c | 71.50 | 70.97 | 71.66 | 66.05 | ----- | z | 40.13 | 32.32 | 54.46 | b | ||||||
2016 | 31.02 | 38.29 | 44.42 | 50.28 | 55.72 | a | 71.16 | b | 75.50 | a | 68.68 | 63.47 | 56.23 | 42.52 | 35.28 | a | 52.71 | |||||||||
2017 | 34.13 | 40.89 | 47.18 | 50.60 | ----- | z | 70.13 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.20 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.15 | 35.01 | 41.12 | 48.88 | 57.71 | 67.26 | 71.96 | 69.23 | 62.32 | 51.10 | 39.23 | 30.75 | 49.77 | |||||||||||||
S.D. | 4.31 | 4.10 | 3.40 | 2.91 | 2.89 | 2.47 | 2.05 | 2.08 | 2.21 | 2.63 | 2.65 | 3.72 | 1.25 | |||||||||||||
SKEW | 0.22 | -1.35 | 0.02 | 0.04 | 0.39 | 0.27 | 0.73 | 0.30 | -0.13 | -0.05 | -0.66 | -0.49 | 0.14 | |||||||||||||
MAX | 40.30 | 41.00 | 48.71 | 54.95 | 64.25 | 73.10 | 78.87 | 74.11 | 66.48 | 56.88 | 43.48 | 37.35 | 52.71 | |||||||||||||
MIN | 20.16 | 20.41 | 34.55 | 43.02 | 52.18 | 61.92 | 68.32 | 64.89 | 56.77 | 45.45 | 31.82 | 23.05 | 47.37 | |||||||||||||
YRS | 47 | 45 | 51 | 54 | 58 | 59 | 58 | 57 | 59 | 47 | 48 | 49 | 36 |