YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | 51.66 | k | 58.92 | a | 60.79 | k | 68.47 | b | 69.71 | 59.95 | b | 47.42 | a | 35.30 | b | 34.02 | c | 53.40 | e | |
1947 | 27.84 | 38.59 | a | 46.11 | c | 51.90 | d | 62.95 | 61.28 | a | 68.74 | d | 65.76 | d | 61.32 | 51.46 | d | 39.84 | a | 34.90 | a | 50.89 | ||||
1948 | 31.74 | d | 32.72 | f | ----- | z | ----- | z | ----- | z | 66.48 | 65.18 | a | 64.69 | b | 57.85 | 47.60 | 37.92 | 24.14 | b | 49.45 | d | ||||
1949 | 14.50 | 29.95 | 41.24 | 51.23 | 59.16 | 61.83 | 63.53 | 65.05 | 61.91 | a | 45.90 | 42.30 | 32.63 | 47.44 | ||||||||||||
1950 | 13.15 | a | 30.41 | 38.17 | b | 45.28 | a | 53.77 | 63.05 | 70.31 | 70.68 | 63.23 | 48.75 | c | 36.62 | q | 36.53 | 48.48 | a | |||||||
1951 | 30.38 | a | 36.48 | e | 38.18 | a | 50.32 | 56.16 | 64.18 | 69.44 | 67.08 | 62.02 | 47.53 | a | 37.97 | 25.40 | 48.76 | |||||||||
1952 | 22.06 | 33.45 | 39.22 | a | 48.97 | 56.29 | 60.48 | 69.79 | 67.63 | 64.55 | 56.13 | a | 33.17 | 31.40 | 48.60 | |||||||||||
1953 | 39.23 | 39.91 | 42.74 | 46.80 | 52.94 | 57.45 | 68.73 | a | 67.67 | a | 62.15 | 53.24 | 41.21 | b | 35.94 | 50.67 | ||||||||||
1954 | 27.05 | a | 33.91 | 37.10 | 44.89 | b | 54.89 | 57.87 | 65.00 | b | 63.02 | a | 58.07 | 46.26 | 42.35 | 29.94 | 46.69 | |||||||||
1955 | 26.83 | a | 32.21 | 35.50 | a | 41.48 | a | 51.07 | a | 62.32 | 65.97 | 66.31 | e | 58.87 | 47.53 | 30.73 | 26.07 | b | 45.41 | |||||||
1956 | 28.81 | 24.88 | 40.05 | 50.22 | a | 58.43 | a | 57.83 | 67.43 | a | 65.18 | a | 57.28 | 46.66 | 32.78 | 29.45 | 46.59 | |||||||||
1957 | 13.14 | b | 31.80 | 38.90 | a | 48.37 | 58.11 | 62.38 | a | 64.02 | a | 63.18 | 61.92 | 45.50 | 37.15 | 36.16 | 46.72 | |||||||||
1958 | 35.27 | 42.45 | 40.52 | a | 46.29 | a | 61.31 | 67.38 | 74.00 | a | 70.53 | 58.73 | 50.50 | 36.24 | c | 32.74 | 51.33 | |||||||||
1959 | 29.42 | a | 33.41 | 40.69 | 48.55 | 51.18 | 60.73 | b | 69.65 | 64.69 | 56.58 | 49.08 | 35.18 | 31.08 | a | 47.52 | ||||||||||
1960 | 22.27 | 32.67 | 39.45 | 46.60 | 51.40 | a | 63.81 | a | 73.32 | 64.67 | a | 61.40 | 51.65 | 38.58 | 26.90 | 47.73 | ||||||||||
1961 | 32.75 | a | 40.73 | 42.46 | c | 47.52 | a | 54.95 | b | 67.05 | 71.76 | 73.77 | a | 57.16 | a | 47.18 | 32.57 | 31.16 | 49.92 | |||||||
1962 | 28.69 | 34.88 | 38.47 | 50.57 | 51.31 | 61.42 | 68.22 | a | 65.80 | f | 63.02 | b | 50.21 | 41.02 | a | 35.75 | a | 47.59 | a | |||||||
1963 | 25.66 | 38.77 | 41.94 | 44.92 | 54.17 | b | 61.47 | 62.63 | a | 66.19 | 65.57 | a | 52.37 | 40.66 | a | 29.63 | a | 48.66 | ||||||||
1964 | 34.45 | 36.38 | 38.81 | 44.12 | a | 51.18 | c | 59.68 | 66.24 | 62.58 | 57.27 | 47.98 | 35.67 | 23.68 | 46.50 | |||||||||||
1965 | 29.56 | 39.06 | a | 39.85 | 48.70 | 52.79 | 63.77 | 68.90 | a | 68.18 | 58.17 | 51.10 | a | 39.53 | 30.19 | b | 49.15 | |||||||||
1966 | 30.79 | 35.31 | a | 40.95 | 48.02 | c | 55.26 | 58.87 | 65.67 | a | 68.31 | 61.85 | 49.87 | 41.60 | 36.93 | a | 49.45 | |||||||||
1967 | 37.80 | a | 40.18 | 39.97 | 42.84 | b | 54.45 | 65.33 | a | 69.11 | 73.48 | a | 65.30 | 50.15 | a | 38.17 | 32.53 | 50.78 | ||||||||
1968 | 30.68 | c | 37.69 | 43.62 | a | 45.82 | 55.32 | a | 62.35 | 69.40 | b | 63.89 | 59.93 | 45.95 | a | 37.88 | 26.84 | 48.28 | ||||||||
1969 | 18.40 | 30.02 | 41.84 | 47.91 | a | 58.55 | a | 67.22 | 67.29 | 64.61 | 60.53 | 47.19 | 38.40 | 30.81 | 47.73 | |||||||||||
1970 | 26.95 | 36.91 | 40.66 | 43.37 | 53.69 | 65.15 | 68.22 | a | 67.25 | a | 55.33 | 46.24 | 36.67 | 27.50 | 47.33 | |||||||||||
1971 | 34.73 | 37.27 | 38.06 | 46.52 | a | 57.05 | 57.07 | 70.19 | 72.60 | 55.75 | 47.95 | 39.23 | 28.98 | 48.78 | ||||||||||||
1972 | 28.66 | 32.93 | 42.74 | 44.17 | 57.35 | a | 63.00 | 68.21 | 69.56 | 56.13 | 48.71 | 38.55 | a | 25.85 | 47.99 | |||||||||||
1973 | 27.08 | 34.62 | 41.85 | 49.25 | 56.89 | 62.72 | 70.02 | a | 66.76 | 61.08 | 49.02 | 35.34 | a | 34.72 | a | 49.11 | ||||||||||
1974 | 27.18 | 38.46 | 42.31 | 47.45 | a | 51.22 | a | 64.25 | 65.81 | 68.02 | 61.63 | 49.47 | 38.97 | 32.44 | 48.93 | |||||||||||
1975 | 28.33 | b | 31.41 | 38.45 | 44.07 | 53.37 | 60.35 | 71.08 | 63.37 | 60.71 | a | 48.31 | 38.07 | 32.63 | 47.51 | |||||||||||
1976 | 33.68 | 35.09 | 39.46 | e | 46.80 | 54.85 | 58.96 | e | 66.79 | 64.98 | 63.38 | a | 50.03 | 39.69 | a | 30.92 | 48.72 | |||||||||
1977 | 24.48 | b | 37.81 | b | 41.00 | 52.09 | a | 51.39 | 65.93 | b | 66.63 | 72.41 | b | 57.13 | 49.60 | 36.93 | 33.37 | 49.06 | ||||||||
1978 | 31.88 | b | 36.55 | 44.93 | a | 48.28 | 52.90 | 64.63 | 68.21 | 64.97 | a | 57.88 | a | 48.60 | e | 32.96 | b | 27.85 | 48.30 | |||||||
1979 | 15.29 | 32.84 | 43.60 | 48.08 | 57.77 | 63.71 | a | 69.43 | a | 67.55 | 62.82 | 53.37 | 33.58 | 33.64 | b | 48.47 | ||||||||||
1980 | 20.90 | 31.04 | b | 40.13 | 49.37 | 55.68 | 58.67 | 66.05 | b | 63.55 | 60.27 | 50.10 | 38.93 | 35.82 | a | 47.54 | ||||||||||
1981 | 35.92 | 37.55 | ----- | z | 47.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.29 | i | |||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.84 | c | 41.38 | 21.00 | 37.07 | i | ||
1984 | 30.95 | 36.57 | 44.77 | 46.03 | a | 50.70 | d | 59.43 | b | 68.54 | d | 67.72 | d | 57.12 | 45.45 | 36.81 | a | 23.16 | 47.27 | |||||||
1985 | 24.13 | 29.57 | 40.88 | a | 50.58 | 58.00 | 63.41 | a | 73.97 | 66.84 | 56.10 | 48.53 | 24.30 | 18.84 | 46.26 | |||||||||||
1986 | 30.79 | 36.38 | 46.40 | 47.87 | 57.31 | 67.62 | 65.02 | 73.48 | a | 57.55 | 52.11 | 39.02 | 27.53 | 50.09 | ||||||||||||
1987 | 28.47 | 37.62 | 44.56 | 53.13 | 59.39 | 66.00 | 67.77 | 68.81 | 64.50 | 52.53 | 40.97 | 29.48 | 51.10 | |||||||||||||
1988 | 29.71 | 39.09 | 43.34 | 51.72 | 56.45 | b | 62.72 | 69.82 | 68.19 | 61.12 | 56.37 | 41.08 | 29.02 | 50.72 | ||||||||||||
1989 | 34.98 | 25.73 | 40.42 | 52.50 | 56.34 | 66.43 | a | 68.35 | 66.50 | 61.68 | 49.37 | 42.13 | 30.40 | 49.57 | ||||||||||||
1990 | 35.78 | a | 35.41 | 44.42 | 53.13 | 54.95 | a | 63.42 | 73.61 | 69.95 | 66.40 | 48.03 | 42.87 | 23.61 | 50.97 | |||||||||||
1991 | 28.32 | 42.07 | 40.60 | a | 48.53 | a | 55.19 | 60.15 | 70.44 | 71.23 | a | 64.30 | 50.32 | c | 37.85 | c | 35.03 | 50.34 | ||||||||
1992 | 34.71 | 39.76 | 47.56 | 50.67 | 60.44 | 68.93 | a | 69.94 | 69.98 | 59.35 | 52.13 | 37.48 | a | 26.05 | 51.42 | |||||||||||
1993 | 22.94 | 29.05 | 40.02 | 47.80 | 61.11 | 62.85 | 63.29 | 67.10 | 61.74 | a | 52.45 | 32.83 | 31.90 | 47.76 | ||||||||||||
1994 | 37.78 | a | 33.69 | b | 45.32 | 52.65 | 59.21 | 62.77 | 73.37 | 69.58 | 65.60 | 49.69 | 36.02 | a | 32.63 | 51.53 | ||||||||||
1995 | 31.26 | 40.38 | 42.31 | 47.70 | 58.05 | a | 61.18 | 69.02 | 63.77 | a | 63.80 | 47.73 | 41.15 | 31.18 | c | 49.79 | ||||||||||
1996 | 27.00 | e | ----- | z | ----- | z | 49.34 | b | 51.92 | a | 61.45 | 71.76 | 69.22 | b | 57.64 | a | 48.18 | 35.75 | b | 25.38 | b | 49.76 | b | |||
1997 | 29.34 | 35.64 | 43.23 | 47.28 | 58.96 | c | 61.81 | a | 67.88 | a | 70.68 | a | 61.65 | 48.63 | 40.12 | ----- | z | 51.38 | a | |||||||
1998 | 31.61 | 39.00 | 43.77 | ----- | z | 56.76 | 64.17 | 74.52 | a | 71.21 | 65.85 | 47.95 | 41.73 | b | 30.52 | a | 51.55 | a | ||||||||
1999 | 36.10 | 38.09 | 41.81 | 46.83 | 52.74 | 62.00 | 67.27 | 70.23 | 59.90 | 48.76 | 43.45 | 35.16 | 50.19 | |||||||||||||
2000 | 29.58 | 36.18 | a | 41.67 | a | 50.95 | 56.27 | 64.45 | 67.90 | 68.26 | 59.88 | 49.11 | 31.53 | 27.32 | 48.59 | |||||||||||
2001 | 30.76 | 34.28 | a | 43.47 | 47.47 | 57.83 | a | 61.03 | 69.50 | b | 70.69 | 63.77 | 49.44 | 40.59 | a | 33.46 | c | 50.19 | ||||||||
2002 | 34.79 | b | 36.80 | 39.24 | 48.78 | 54.44 | 64.70 | 72.27 | 68.11 | 60.90 | a | 47.85 | a | 38.88 | 34.44 | 50.10 | ||||||||||
2003 | 35.93 | a | 37.25 | 45.63 | 48.18 | 54.87 | 65.25 | 72.15 | 69.93 | a | 64.22 | 54.02 | a | 34.73 | 30.23 | 51.03 | ||||||||||
2004 | 27.10 | 35.79 | 45.84 | 50.82 | 55.37 | 64.90 | 72.03 | 70.97 | 60.13 | 51.56 | 38.58 | 34.52 | 50.63 | |||||||||||||
2005 | 30.39 | 35.91 | 45.18 | 49.72 | 59.29 | 61.47 | 70.50 | 70.98 | 59.65 | 51.03 | 35.78 | 26.58 | 49.71 | |||||||||||||
2006 | 36.12 | a | 34.77 | 41.63 | 48.92 | 56.60 | 63.62 | 72.42 | 68.48 | 61.47 | 49.08 | 37.15 | 27.26 | 49.79 | ||||||||||||
2007 | 27.50 | 35.71 | 44.77 | 47.27 | 57.27 | 62.68 | 73.40 | 67.61 | 60.17 | 47.52 | 37.47 | 30.45 | 49.32 | |||||||||||||
2008 | 26.24 | 38.33 | 39.80 | a | 43.67 | 58.28 | a | 61.78 | 70.92 | 68.29 | b | 61.50 | 49.52 | 40.70 | 24.39 | 48.62 | ||||||||||
2009 | 29.74 | 34.18 | 39.02 | 47.38 | 56.69 | 66.45 | 73.50 | 70.42 | 63.23 | 46.29 | 38.95 | 23.82 | 49.14 | |||||||||||||
2010 | 35.21 | 39.52 | 42.98 | 47.57 | 52.15 | 58.23 | 70.35 | 68.26 | 61.03 | 50.58 | 35.07 | 31.35 | 49.36 | |||||||||||||
2011 | 32.48 | 34.04 | 41.65 | 44.22 | 52.79 | 60.42 | 65.69 | d | 69.84 | f | 64.95 | 49.73 | 36.38 | 28.55 | 46.44 | a | ||||||||||
2012 | 30.18 | 36.24 | 41.23 | 49.80 | 55.34 | 57.92 | r | ----- | z | 71.05 | 63.30 | 50.44 | d | 40.45 | 33.21 | 47.12 | b | |||||||||
2013 | 28.58 | 37.89 | 42.60 | 49.23 | 57.97 | 64.30 | 73.40 | 71.26 | 63.53 | 48.55 | a | 37.12 | 26.71 | 50.10 | ||||||||||||
2014 | 32.35 | 31.30 | 43.21 | 50.25 | 58.55 | 64.07 | 75.69 | 72.52 | 62.58 | 54.84 | 36.12 | b | 34.05 | 51.29 | ||||||||||||
2015 | 32.53 | 42.13 | a | 48.12 | a | 48.77 | 61.40 | 72.03 | 74.79 | 71.69 | 60.15 | 55.63 | 37.20 | 30.82 | 52.94 | |||||||||||
2016 | 30.69 | 40.22 | 44.37 | 54.72 | 59.76 | 64.85 | 69.85 | 70.56 | 60.65 | 50.02 | 44.23 | 25.08 | 51.25 | |||||||||||||
2017 | 21.00 | b | 30.07 | 42.20 | d | ----- | z | ----- | z | ----- | z | ----- | z | 70.14 | m | 63.02 | 48.15 | 39.27 | 28.61 | 38.90 | e | |||||
2018 | 35.40 | 35.79 | 41.45 | 48.38 | 62.62 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.26 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.23 | 35.59 | 41.83 | 48.21 | 55.96 | 62.93 | 69.29 | 68.20 | 60.94 | 49.56 | 37.83 | 30.00 | 49.15 | |||||||||||||
S.D. | 5.74 | 3.72 | 2.60 | 2.70 | 2.97 | 2.94 | 3.04 | 2.89 | 2.76 | 2.48 | 3.41 | 4.09 | 1.59 | |||||||||||||
SKEW | -0.95 | -0.57 | 0.18 | -0.08 | 0.03 | 0.27 | -0.01 | -0.10 | -0.11 | 0.80 | -0.98 | -0.39 | -0.11 | |||||||||||||
MAX | 39.23 | 42.45 | 48.12 | 54.72 | 62.95 | 72.03 | 75.69 | 73.77 | 66.40 | 56.37 | 44.23 | 36.93 | 52.94 | |||||||||||||
MIN | 13.14 | 24.88 | 35.50 | 41.48 | 50.70 | 57.07 | 62.63 | 62.58 | 55.33 | 45.45 | 24.30 | 18.84 | 45.41 | |||||||||||||
YRS | 70 | 68 | 67 | 67 | 67 | 66 | 67 | 66 | 69 | 70 | 69 | 69 | 59 |