YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.95 | l | 76.45 | 71.77 | 53.68 | 40.87 | 30.58 | 54.67 | g | |||||
1953 | 26.06 | 26.18 | 37.42 | 46.17 | 64.68 | 75.14 | b | 79.48 | 79.65 | 69.53 | 67.03 | a | 46.53 | 29.55 | 53.95 | |||||||||||
1954 | 20.29 | 37.86 | 34.71 | 52.93 | 56.90 | 76.17 | 78.84 | 75.26 | 64.10 | 53.42 | 41.67 | 29.23 | 51.78 | |||||||||||||
1955 | 23.26 | 25.82 | 33.77 | 59.77 | 70.87 | 74.80 | 83.61 | 80.58 | 68.67 | 58.97 | 33.90 | 22.90 | 53.08 | |||||||||||||
1956 | 27.87 | 28.86 | 35.29 | 47.48 | c | 65.92 | f | 78.03 | 73.16 | 75.32 | 65.90 | a | 66.37 | a | 39.30 | 30.00 | 51.60 | a | ||||||||
1957 | 17.32 | 28.14 | 36.77 | 53.97 | 64.13 | 73.33 | 80.84 | 76.74 | 66.90 | 57.19 | 37.77 | 29.97 | 51.92 | |||||||||||||
1958 | 27.55 | 23.79 | 37.71 | 55.57 | 67.52 | 72.00 | a | 77.13 | 77.13 | 69.40 | 58.77 | 41.63 | 20.61 | 52.40 | ||||||||||||
1959 | 17.55 | 25.50 | 39.13 | 52.03 | 68.61 | 76.23 | 81.06 | 78.29 | 69.43 | 50.71 | 31.60 | 33.65 | 51.98 | |||||||||||||
1960 | 23.48 | 28.00 | 32.65 | 54.79 | f | 60.77 | 73.60 | 79.13 | 78.48 | 68.70 | 58.52 | 42.43 | 24.74 | 51.86 | a | |||||||||||
1961 | 22.26 | 33.75 | 39.39 | 48.57 | 63.58 | 76.83 | 78.06 | 81.52 | 68.43 | 58.42 | 40.13 | 25.65 | 53.05 | |||||||||||||
1962 | 18.29 | 21.32 | 38.06 | 48.30 | 67.03 | 72.90 | a | 76.13 | 77.77 | 65.60 | 58.10 | a | 40.77 | 26.52 | 50.90 | |||||||||||
1963 | 13.26 | 20.29 | 41.10 | 55.83 | 63.23 | 77.23 | 81.90 | 74.68 | 70.53 | 69.16 | 44.73 | 20.71 | 52.72 | |||||||||||||
1964 | 30.90 | 31.28 | 34.35 | 51.87 | 71.45 | 74.50 | 81.47 | a | 72.97 | 65.37 | 56.39 | 42.27 | 21.93 | a | 52.90 | |||||||||||
1965 | 19.58 | 22.43 | 29.52 | 50.69 | a | 70.67 | a | 74.80 | 77.32 | 76.00 | 62.00 | 58.94 | 40.17 | a | 32.68 | 51.23 | ||||||||||
1966 | 17.10 | a | 29.04 | a | 43.97 | 49.37 | 62.48 | 79.70 | 84.29 | 74.27 | a | 67.57 | 57.55 | 38.60 | 26.65 | 52.55 | ||||||||||
1967 | 26.00 | 22.00 | 39.55 | 52.30 | 59.16 | 71.97 | 76.48 | 75.29 | 70.57 | 54.26 | 36.73 | 29.65 | 51.16 | |||||||||||||
1968 | 23.52 | 24.66 | 47.19 | 54.70 | 60.58 | 70.70 | 78.26 | 76.81 | 68.77 | 59.00 | 39.30 | 25.52 | 52.42 | |||||||||||||
1969 | 21.58 | 29.07 | 34.84 | 53.03 | 65.58 | 65.03 | a | 76.42 | 80.71 | 67.80 | 52.77 | 40.10 | 28.32 | 51.27 | ||||||||||||
1970 | 16.77 | 25.86 | 34.39 | 54.10 | 58.84 | 75.57 | 81.90 | 79.77 | 68.60 | 58.81 | 39.00 | 26.55 | 51.68 | |||||||||||||
1971 | 16.29 | 25.04 | 36.39 | 51.87 | 60.94 | 78.03 | 75.16 | 74.06 | 70.17 | 60.45 | 39.07 | 28.03 | 51.29 | |||||||||||||
1972 | 19.00 | 21.07 | 31.00 | 45.30 | 69.29 | 72.53 | 75.06 | 74.13 | 64.40 | 52.03 | 36.93 | 21.71 | 48.54 | |||||||||||||
1973 | 29.16 | 28.79 | 44.23 | 50.80 | 59.26 | 75.10 | 77.35 | 78.42 | 65.43 | 61.81 | 39.20 | 26.13 | 52.97 | |||||||||||||
1974 | 21.65 | 25.96 | a | 37.58 | 53.00 | 62.84 | 69.77 | h | 83.47 | a | 75.35 | 63.07 | 57.77 | 43.53 | 34.71 | 50.81 | a | |||||||||
1975 | 25.19 | 29.61 | 36.23 | 46.83 | 71.03 | 75.33 | 81.13 | h | 77.54 | g | 63.83 | 61.06 | 47.23 | 27.16 | 48.35 | b | ||||||||||
1976 | 23.58 | 37.21 | 39.42 | 56.73 | 65.29 | 79.90 | 81.23 | 82.26 | 70.73 | ----- | z | ----- | z | ----- | z | 59.59 | c | |||||||||
1977 | 13.87 | 30.71 | 45.77 | 58.73 | 77.35 | 73.83 | 78.71 | q | 72.19 | 65.23 | 56.35 | 41.93 | 25.26 | 51.02 | a | |||||||||||
1978 | 18.52 | 24.11 | 40.35 | 48.63 | 68.32 | 73.57 | 75.74 | 76.84 | 70.33 | 58.52 | 40.37 | 23.87 | 51.60 | |||||||||||||
1979 | 13.03 | 20.89 | 38.16 | 49.83 | 58.84 | 72.50 | 78.74 | 73.23 | 70.27 | 52.83 | a | 40.13 | 34.48 | 50.25 | ||||||||||||
1980 | 23.45 | 22.83 | e | 35.39 | 54.07 | b | 70.61 | 73.33 | 80.61 | 76.32 | 66.87 | 53.47 | a | 43.03 | 26.48 | 52.21 | ||||||||||
1981 | 27.32 | 31.36 | 42.94 | 55.27 | 65.35 | 73.33 | 78.65 | 77.13 | a | 66.14 | a | 53.19 | 47.38 | a | 29.29 | 53.95 | ||||||||||
1982 | 15.43 | a | 28.71 | 39.55 | 52.03 | a | 70.45 | b | 69.45 | a | 81.03 | 74.71 | 66.90 | a | 57.86 | b | 40.47 | 32.76 | b | 52.45 | ||||||
1983 | 29.45 | b | 34.54 | 39.65 | 48.17 | 60.76 | b | 75.37 | c | 84.57 | a | 83.57 | a | 71.11 | b | 57.37 | a | 41.26 | c | 18.29 | c | 53.67 | ||||
1984 | 22.76 | b | 37.75 | a | 33.70 | a | 55.86 | a | 62.60 | a | 74.83 | 77.97 | 77.83 | a | 65.24 | a | 59.85 | d | 46.93 | c | 29.57 | a | 53.74 | |||
1985 | 24.30 | d | 27.04 | 45.23 | a | 57.72 | a | 68.36 | c | 72.03 | a | 77.97 | a | 73.07 | a | 67.50 | b | 60.52 | b | 36.52 | e | 18.57 | a | 52.40 | ||
1986 | 29.88 | e | 28.04 | a | 46.03 | a | 59.61 | b | 67.21 | c | 75.00 | a | 80.30 | a | 72.14 | b | 65.46 | d | 58.00 | b | 41.96 | d | 36.48 | f | 56.69 | a |
1987 | 33.13 | 44.19 | b | 48.52 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.95 | i | |
1988 | 18.35 | 21.24 | 36.03 | a | 53.93 | 73.55 | b | 79.00 | 83.47 | a | 76.50 | a | 67.27 | 48.58 | 37.03 | 25.65 | 51.72 | |||||||||
1989 | 28.97 | 18.82 | 31.29 | 48.83 | 65.84 | 70.27 | 79.58 | 76.48 | 68.60 | 57.32 | 33.10 | 14.84 | 49.50 | |||||||||||||
1990 | 31.74 | 30.14 | 41.23 | 54.47 | 61.52 | 73.33 | 73.61 | 73.06 | 66.20 | 52.68 | 43.17 | 24.81 | 52.16 | |||||||||||||
1991 | 18.16 | 31.64 | 38.68 | 56.63 | 67.45 | 75.03 | 75.90 | 78.06 | 64.63 | 52.32 | 32.53 | 27.29 | 51.53 | |||||||||||||
1992 | 26.39 | 30.62 | 35.45 | 45.87 | 68.68 | 69.41 | a | 70.35 | 72.16 | 66.93 | 53.16 | 34.07 | 26.61 | 49.98 | ||||||||||||
1993 | 22.29 | 25.43 | 36.58 | 44.14 | a | 62.93 | a | 68.66 | a | 75.10 | 76.39 | 60.40 | 51.90 | 33.40 | 27.38 | b | 48.72 | |||||||||
1994 | 12.36 | c | 17.68 | 37.42 | 49.47 | 64.71 | 75.33 | 75.32 | 72.42 | 68.77 | 57.16 | 42.40 | 31.68 | 50.39 | ||||||||||||
1995 | 22.65 | 23.86 | 38.03 | 44.38 | a | 63.30 | a | 76.60 | 76.90 | 79.87 | 66.43 | 53.37 | a | 28.50 | 21.40 | a | 49.61 | |||||||||
1996 | 17.71 | c | 21.34 | 27.60 | a | 42.33 | 59.06 | 72.40 | 72.74 | 77.58 | 65.73 | 56.26 | 31.67 | 23.33 | a | 47.31 | ||||||||||
1997 | 16.81 | 27.32 | 33.50 | a | 47.57 | 55.32 | 77.40 | 74.90 | 71.74 | 67.97 | 55.87 | a | 34.37 | 31.84 | 49.55 | |||||||||||
1998 | 23.90 | 38.21 | 35.19 | 55.10 | 70.48 | 70.13 | 79.16 | 78.61 | 73.33 | 58.13 | 41.47 | 31.83 | a | 54.63 | ||||||||||||
1999 | 18.19 | 33.07 | 38.32 | 51.67 | 66.97 | 72.70 | 80.42 | 74.16 | 68.00 | 53.13 | 46.63 | 28.90 | 52.68 | |||||||||||||
2000 | 22.43 | a | 34.33 | b | 45.29 | 41.70 | t | 66.35 | 68.38 | a | 74.00 | 76.10 | 66.47 | 61.68 | 38.67 | 16.00 | 51.79 | a | ||||||||
2001 | 27.16 | 20.25 | 34.26 | 51.43 | 66.19 | 72.90 | 77.48 | 78.81 | 63.80 | 53.10 | 48.53 | 30.61 | 52.04 | |||||||||||||
2002 | 26.00 | 30.14 | 26.60 | a | 45.37 | 57.13 | 71.37 | 80.48 | 72.81 | 68.20 | 44.87 | 34.47 | 27.06 | 48.71 | ||||||||||||
2003 | 17.26 | 18.43 | 32.61 | 45.33 | 62.45 | 69.13 | 75.90 | 77.68 | 67.97 | 53.84 | 34.87 | 28.55 | 48.67 | |||||||||||||
2004 | 13.06 | 26.48 | 36.58 | 47.13 | 59.26 | 68.10 | 72.90 | 67.97 | 71.40 | 55.45 | 40.87 | 24.60 | a | 48.65 | ||||||||||||
2005 | 16.58 | 29.00 | 33.06 | 55.10 | 55.06 | m | ----- | z | ----- | z | 74.32 | 70.83 | 57.62 | e | 39.60 | 22.39 | 44.28 | c | ||||||||
2006 | 29.52 | 22.25 | 34.81 | 56.73 | 61.23 | 73.00 | 82.39 | 75.06 | 62.73 | 49.06 | 39.79 | a | 29.52 | 51.34 | ||||||||||||
2007 | 22.93 | a | 15.59 | a | 39.87 | a | 48.00 | 66.45 | 75.62 | a | 77.39 | 76.06 | 67.60 | 55.07 | a | 34.87 | 20.32 | 49.98 | ||||||||
2008 | 21.69 | b | 20.55 | 30.23 | 44.23 | 58.29 | 69.17 | 75.06 | 75.23 | 66.27 | 51.71 | 35.50 | b | 18.47 | a | 47.20 | ||||||||||
2009 | 12.13 | 25.19 | b | 33.74 | 46.39 | b | 62.53 | a | 68.76 | a | 69.35 | 71.58 | 71.13 | 44.94 | 44.80 | 19.90 | 47.54 | |||||||||
2010 | 20.23 | 24.61 | 44.97 | a | 57.30 | 65.00 | a | 68.43 | 76.84 | 76.48 | 60.33 | r | 57.29 | 41.33 | 24.13 | a | 50.60 | a | ||||||||
2011 | 17.65 | 26.25 | 34.71 | 49.97 | 60.37 | a | 71.47 | 82.07 | c | 78.23 | a | 66.37 | 59.34 | b | 42.86 | a | 31.53 | a | 51.73 | |||||||
2012 | 28.42 | 33.44 | d | 52.28 | b | 50.96 | b | 68.62 | b | 76.89 | c | 82.93 | d | 76.00 | a | 67.79 | b | 52.19 | 40.66 | a | 29.67 | a | 54.99 | |||
2013 | 23.86 | b | 22.82 | 30.81 | 40.22 | c | 61.07 | b | 71.12 | e | 76.30 | a | 76.47 | a | 69.73 | 53.69 | b | 36.00 | b | 17.04 | c | 48.26 | ||||
2014 | 12.48 | 17.15 | b | 27.76 | b | 44.48 | a | 62.52 | 72.07 | b | 75.34 | b | 73.27 | a | 67.25 | f | 52.66 | b | 29.83 | 26.80 | a | 44.94 | a | |||
2015 | 20.71 | 14.19 | a | 38.70 | a | 50.96 | b | 64.38 | b | 71.37 | c | 77.87 | 74.72 | b | 75.62 | f | 55.57 | c | 46.14 | a | 33.76 | b | 49.85 | a | ||
2016 | 21.39 | 27.52 | 41.41 | b | 47.34 | a | 64.70 | a | 71.97 | a | 78.10 | a | 76.97 | 68.87 | ----- | z | ----- | z | ----- | z | 55.36 | c | ||||
2017 | ----- | z | ----- | z | ----- | z | 52.90 | a | 58.67 | a | 74.37 | c | 77.30 | h | 70.92 | g | 72.43 | 58.26 | 34.53 | 19.94 | 53.01 | e | ||||
2018 | 21.17 | b | 22.64 | 34.94 | 39.50 | 73.10 | a | 75.50 | 78.57 | a | 75.70 | a | 67.64 | b | 48.87 | 28.33 | 28.84 | 49.57 | ||||||||
2019 | 17.93 | a | 18.00 | 33.35 | 46.90 | 56.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.52 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.65 | 26.51 | 37.35 | 50.72 | 64.52 | 73.37 | 78.10 | 76.09 | 67.55 | 56.00 | 39.27 | 26.29 | 51.26 | |||||||||||||
S.D. | 5.27 | 5.94 | 5.17 | 4.71 | 4.72 | 3.11 | 3.37 | 2.84 | 2.64 | 4.51 | 4.73 | 4.79 | 1.92 | |||||||||||||
SKEW | 0.11 | 0.42 | 0.45 | -0.17 | 0.27 | -0.16 | -0.17 | 0.08 | -0.24 | 0.20 | -0.28 | -0.40 | -0.36 | |||||||||||||
MAX | 33.13 | 44.19 | 52.28 | 59.77 | 77.35 | 79.90 | 84.57 | 83.57 | 73.33 | 69.16 | 48.53 | 34.71 | 54.99 | |||||||||||||
MIN | 12.13 | 14.19 | 26.60 | 39.50 | 55.32 | 65.03 | 69.35 | 67.97 | 60.40 | 44.87 | 28.33 | 14.84 | 47.20 | |||||||||||||
YRS | 66 | 66 | 66 | 64 | 64 | 63 | 61 | 64 | 63 | 64 | 64 | 63 | 51 |