YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.38 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.38 | k |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | 18.48 | 20.19 | a | 32.21 | g | 45.04 | d | 49.69 | b | 59.43 | 69.07 | c | 68.42 | 55.66 | a | 38.79 | g | 32.41 | a | 24.80 | a | 44.32 | b | |||
1947 | 16.83 | a | 25.44 | a | 32.10 | a | 40.67 | c | 55.67 | m | 58.36 | b | 69.05 | k | 67.52 | b | 58.76 | e | 46.67 | g | 31.07 | a | 23.43 | c | 39.35 | c |
1948 | 17.38 | e | 27.19 | c | 28.50 | e | 40.93 | c | 51.96 | f | 63.64 | e | 64.92 | g | 63.71 | 56.48 | e | 42.04 | d | 27.32 | e | 23.58 | e | 39.08 | b | |
1949 | 20.22 | d | 19.38 | b | 34.50 | g | 43.54 | f | 50.42 | 58.60 | 66.77 | a | 62.10 | 57.81 | c | 41.00 | 29.90 | 21.23 | 42.74 | b | ||||||
1950 | 18.87 | 26.86 | 33.79 | b | 38.57 | 44.00 | 52.85 | d | ----- | z | 60.90 | b | 55.57 | 46.58 | 28.04 | c | 24.75 | c | 39.16 | a | ||||||
1951 | 19.71 | 24.29 | 30.13 | 41.73 | 52.13 | 60.07 | 74.07 | a | 68.61 | 57.07 | o | 42.13 | h | 26.77 | q | 19.81 | o | 46.34 | d | |||||||
1952 | 19.35 | 24.84 | d | 29.45 | 41.28 | a | 50.26 | 59.22 | l | 64.03 | 65.97 | b | 55.86 | a | 41.13 | 27.27 | 22.83 | a | 40.21 | a | ||||||
1953 | 24.74 | 23.14 | 28.77 | 37.53 | 45.48 | 57.83 | 66.13 | 60.48 | 51.03 | 38.90 | a | 30.10 | 18.32 | 40.21 | ||||||||||||
1954 | 21.61 | 24.57 | 29.77 | 41.04 | d | 50.97 | 56.93 | 68.81 | 62.61 | 57.07 | a | 43.19 | 30.10 | 21.55 | 42.35 | |||||||||||
1955 | 21.03 | 18.11 | a | 28.42 | 35.90 | 46.29 | 55.30 | 65.48 | 67.45 | 54.57 | 40.42 | 27.20 | 22.03 | a | 40.18 | |||||||||||
1956 | 25.68 | 20.45 | 27.71 | 38.93 | a | 50.45 | 61.37 | 64.69 | b | 61.03 | 51.90 | 39.48 | 22.08 | d | 16.66 | b | 40.04 | |||||||||
1957 | 25.45 | b | 32.79 | 32.73 | a | 37.74 | c | 46.23 | 57.47 | 62.13 | 65.16 | 50.93 | 44.68 | 30.61 | b | 25.13 | 42.59 | |||||||||
1958 | 21.10 | 30.89 | 33.06 | 38.97 | 52.32 | 61.60 | 63.84 | 66.32 | 55.03 | 40.29 | 27.60 | 18.53 | a | 42.46 | ||||||||||||
1959 | 18.42 | 22.96 | 26.52 | d | 40.67 | 50.48 | 62.87 | 67.84 | 63.52 | 53.00 | a | 39.68 | 25.34 | a | 22.45 | 41.15 | ||||||||||
1960 | 18.10 | 21.52 | 30.20 | a | 39.27 | 48.67 | a | 59.87 | 66.42 | 63.55 | 56.13 | 43.32 | 31.20 | 25.17 | a | 41.95 | ||||||||||
1961 | 16.58 | 27.43 | 33.03 | 39.00 | 48.06 | 59.43 | 66.03 | 64.74 | 51.13 | 38.45 | 28.97 | 8.52 | 40.12 | |||||||||||||
1962 | 12.06 | 27.46 | 24.07 | a | 37.77 | 43.71 | 52.97 | ----- | z | 56.71 | x | 56.33 | l | 43.70 | d | 33.34 | a | 22.48 | 33.06 | c | ||||||
1963 | 6.04 | g | 28.15 | a | 27.97 | b | 36.46 | b | 49.47 | a | 52.50 | b | 66.48 | d | 63.35 | e | 54.76 | a | 43.90 | b | 29.73 | d | 14.85 | d | 42.51 | a |
1964 | 16.50 | e | ----- | z | ----- | z | 37.00 | f | 46.76 | f | 59.67 | f | 69.62 | e | 62.50 | e | 52.08 | f | 39.48 | h | 26.05 | i | 21.52 | j | 49.54 | i |
1965 | 24.90 | k | 21.38 | g | 27.13 | h | 39.26 | g | 47.81 | 55.10 | 64.32 | 61.42 | 52.33 | 40.00 | 34.70 | 25.97 | 47.71 | d | ||||||||
1966 | 18.39 | 21.32 | 28.35 | 36.62 | a | 48.58 | 57.32 | b | 64.16 | 64.13 | 53.57 | 38.23 | 29.17 | 18.45 | 39.86 | |||||||||||
1967 | 15.45 | 24.18 | 37.10 | 36.80 | 47.52 | 58.07 | 69.00 | 66.13 | 56.07 | 42.00 | 29.00 | 18.90 | a | 41.68 | ||||||||||||
1968 | 13.87 | 31.34 | 32.65 | 38.93 | 47.48 | d | 56.83 | 66.84 | 58.28 | b | 51.47 | 41.26 | 29.80 | 15.68 | 40.37 | |||||||||||
1969 | 23.13 | 28.68 | 29.84 | 39.37 | 51.48 | 54.87 | 64.68 | 67.61 | 56.50 | ----- | z | ----- | z | 25.00 | x | 46.24 | c | |||||||||
1970 | 22.06 | 28.75 | 32.68 | 35.23 | 48.65 | 57.87 | 67.48 | 67.48 | 49.13 | 38.26 | 27.90 | 20.16 | 41.30 | |||||||||||||
1971 | 17.23 | 23.36 | 28.74 | 37.77 | 46.97 | 57.10 | 66.42 | 67.52 | 49.50 | 39.81 | 27.87 | 16.45 | 39.89 | |||||||||||||
1972 | 16.65 | 20.62 | 26.43 | x | 41.54 | b | 45.37 | a | 59.11 | b | 62.10 | b | 63.13 | 55.07 | 46.71 | 30.70 | 19.10 | 41.83 | a | |||||||
1973 | 9.61 | 26.00 | a | 32.10 | 38.70 | 48.17 | a | 54.77 | 62.23 | 60.23 | 44.15 | c | 34.17 | b | 31.00 | d | 22.03 | b | 38.60 | |||||||
1974 | 15.87 | 18.93 | a | 34.39 | 35.37 | 49.48 | 57.90 | a | 64.35 | 60.77 | 53.07 | 41.43 | a | 30.27 | 20.10 | 40.16 | ||||||||||
1975 | 16.52 | 25.11 | 31.23 | 35.77 | 43.26 | 52.50 | 64.87 | 59.52 | 53.07 | 34.97 | 25.03 | 20.28 | b | 38.51 | ||||||||||||
1976 | 16.03 | 26.69 | 27.43 | a | 37.43 | 49.57 | a | 55.07 | 67.23 | 60.82 | c | 54.03 | 38.52 | 27.13 | 14.61 | 39.55 | ||||||||||
1977 | 13.35 | 24.25 | 24.48 | 37.77 | 45.97 | 59.63 | 65.29 | 61.40 | a | 51.80 | 36.55 | 26.73 | 24.68 | 39.33 | ||||||||||||
1978 | 27.90 | 29.18 | 35.47 | a | 40.03 | 45.30 | a | 56.57 | 63.19 | 60.03 | 51.23 | 40.32 | 32.27 | 14.87 | 41.36 | |||||||||||
1979 | 17.61 | 21.14 | 31.42 | 39.67 | 49.48 | 55.20 | 62.35 | 60.16 | 53.00 | 39.97 | 26.40 | 21.55 | 39.83 | |||||||||||||
1980 | 28.68 | 29.14 | a | 30.52 | 38.07 | 46.06 | 53.57 | 62.26 | 60.23 | 49.66 | a | 34.10 | 26.90 | 24.39 | 40.30 | |||||||||||
1981 | 21.13 | 23.54 | 33.03 | 43.90 | 49.45 | 63.40 | 67.33 | a | 64.00 | 55.83 | 42.45 | 29.57 | 22.81 | 43.04 | ||||||||||||
1982 | 21.13 | a | 24.92 | b | 33.58 | 39.50 | 49.80 | a | 56.50 | 65.32 | 65.29 | 56.10 | a | 34.52 | 29.17 | 26.39 | 41.85 | |||||||||
1983 | 23.26 | 30.57 | 35.90 | 36.47 | 46.48 | 55.73 | 64.55 | 66.48 | 54.53 | 41.77 | 32.93 | a | 25.06 | 42.81 | ||||||||||||
1984 | 19.74 | 20.45 | 28.39 | 35.53 | 49.26 | 56.73 | 66.48 | 64.52 | 54.57 | 38.29 | 27.17 | 26.65 | 40.65 | |||||||||||||
1985 | 24.17 | a | 21.65 | b | 33.90 | 41.97 | 50.35 | 58.67 | 68.42 | 63.10 | 51.80 | 42.45 | 31.33 | 23.03 | 42.57 | |||||||||||
1986 | 22.13 | 30.25 | 35.61 | 40.67 | 48.68 | 61.23 | 65.19 | 65.39 | 52.90 | 39.84 | 31.90 | 24.87 | 43.22 | |||||||||||||
1987 | 19.16 | 26.57 | 29.90 | 37.47 | 47.80 | a | 56.80 | 60.45 | 60.61 | 50.50 | 42.23 | 29.63 | 21.68 | 40.23 | ||||||||||||
1988 | 18.61 | 25.52 | 28.26 | 34.23 | 44.40 | a | 55.41 | a | 63.48 | 60.94 | 48.70 | 40.39 | 27.50 | 16.86 | b | 38.69 | ||||||||||
1989 | 11.71 | 20.29 | 28.48 | 39.97 | 46.23 | a | 53.41 | a | 62.29 | 56.42 | 50.43 | 39.26 | 26.77 | 17.03 | 37.69 | |||||||||||
1990 | 19.29 | 27.12 | b | 34.61 | 42.43 | 49.61 | 60.40 | 70.55 | 64.29 | 60.28 | a | 41.10 | a | 31.53 | 8.90 | a | 42.51 | |||||||||
1991 | 11.70 | a | 23.46 | 31.37 | a | 39.10 | 47.13 | 58.73 | 67.52 | 65.93 | a | 56.23 | 43.45 | 31.67 | 25.74 | 41.84 | ||||||||||
1992 | 22.42 | 27.86 | 34.94 | 45.07 | 52.30 | a | 57.10 | 65.16 | 64.94 | 54.63 | 44.10 | 27.03 | 10.13 | 42.14 | ||||||||||||
1993 | 28.68 | 31.07 | 34.00 | 36.87 | 48.84 | 55.17 | a | 64.16 | 63.32 | 50.80 | 41.19 | 26.93 | 20.55 | 41.80 | ||||||||||||
1994 | 19.68 | 24.43 | 33.27 | a | 41.60 | 51.40 | a | 63.13 | 69.23 | 69.65 | 55.27 | 40.10 | 27.77 | 25.84 | 43.45 | |||||||||||
1995 | 28.00 | 29.04 | 36.30 | a | 38.03 | 47.73 | a | 55.50 | 62.90 | 67.17 | a | 55.00 | 37.23 | 28.21 | a | 20.48 | 42.13 | |||||||||
1996 | 19.29 | 27.72 | 27.42 | 35.77 | 51.55 | 60.34 | a | 69.13 | 64.55 | 52.57 | 42.29 | c | 30.21 | b | 22.42 | 41.94 | ||||||||||
1997 | 21.06 | 24.11 | 29.97 | 38.67 | 51.19 | 57.69 | a | 61.03 | 61.74 | 57.27 | 40.32 | 29.00 | 19.68 | 40.98 | ||||||||||||
1998 | 22.06 | 28.96 | 30.97 | b | 36.86 | a | 47.84 | 55.23 | 69.48 | 66.63 | a | 57.40 | 41.20 | a | 30.43 | 20.47 | a | 42.30 | ||||||||
1999 | 22.39 | 23.96 | 33.32 | 38.20 | 49.87 | 60.31 | a | 69.61 | 65.68 | 53.33 | 37.71 | 27.63 | 18.60 | a | 41.72 | |||||||||||
2000 | 23.29 | 29.76 | 32.81 | 43.17 | 50.42 | 61.03 | 67.45 | 69.73 | a | 53.60 | 43.37 | a | 26.33 | 22.87 | a | 43.65 | ||||||||||
2001 | 21.39 | 25.44 | a | 34.58 | 38.60 | 49.29 | 57.33 | 66.77 | a | 64.68 | 54.17 | 41.46 | e | 29.42 | r | 15.24 | f | 45.37 | b | |||||||
2002 | 15.73 | p | 15.16 | i | 22.26 | l | 42.64 | b | 48.65 | 60.13 | 71.65 | 63.43 | a | 58.07 | 42.52 | 31.43 | 25.03 | 49.28 | c | |||||||
2003 | 27.48 | 28.29 | 34.71 | 38.73 | 52.65 | 61.40 | 70.67 | a | 69.29 | 54.30 | 45.73 | a | 33.43 | 24.00 | 45.06 | |||||||||||
2004 | 22.94 | 26.10 | 36.84 | 43.58 | f | 51.74 | 59.90 | 66.07 | a | 64.52 | 54.70 | 45.41 | b | 33.62 | a | 25.03 | a | 44.26 | a | |||||||
2005 | 31.52 | 33.44 | c | 34.35 | 40.38 | a | 49.93 | a | 56.66 | a | 66.63 | a | 65.35 | 57.13 | 44.76 | b | 30.70 | 18.81 | 44.14 | |||||||
2006 | 21.61 | 23.82 | 33.37 | a | 41.62 | a | 52.79 | c | 62.00 | 71.83 | a | 65.48 | b | 50.62 | a | 42.43 | a | 30.80 | 22.00 | 43.20 | ||||||
2007 | 18.03 | 27.89 | 33.52 | 42.10 | 52.87 | 59.63 | 70.19 | 68.10 | 57.07 | 40.26 | 29.27 | 23.16 | 43.51 | |||||||||||||
2008 | 20.54 | g | 29.36 | g | 31.03 | 35.41 | a | 45.45 | 55.87 | 70.76 | b | 65.16 | 53.37 | c | 39.90 | b | 30.93 | 25.74 | 45.36 | b | ||||||
2009 | 24.52 | 24.50 | 30.79 | b | 37.41 | a | 52.93 | a | 59.67 | 68.10 | a | 61.75 | c | 58.60 | 37.19 | 28.66 | a | 17.79 | c | 41.83 | ||||||
2010 | 17.06 | 28.81 | a | 32.97 | 38.83 | 45.83 | a | 58.73 | 67.73 | a | 64.06 | 53.70 | 44.42 | 26.07 | 27.10 | 42.11 | ||||||||||
2011 | 18.81 | 20.75 | 29.83 | b | 37.83 | 46.29 | 58.00 | 67.26 | d | 71.41 | n | 57.60 | 42.19 | 28.21 | a | 21.10 | 38.90 | a | ||||||||
2012 | 20.48 | 27.14 | 32.52 | 39.47 | 50.19 | 61.17 | 71.00 | 68.48 | 56.97 | 42.87 | 28.60 | 22.48 | 43.45 | |||||||||||||
2013 | 15.74 | 23.11 | 33.33 | a | 39.13 | 50.43 | a | 61.37 | 72.29 | 68.35 | 59.57 | 38.81 | 29.60 | 20.94 | 42.72 | |||||||||||
2014 | 19.32 | 25.71 | 32.48 | 40.20 | 48.68 | 59.03 | 71.55 | 65.65 | 59.37 | 45.58 | 28.37 | 28.07 | a | 43.67 | ||||||||||||
2015 | 25.53 | a | 29.75 | 37.29 | 40.50 | 49.77 | a | 60.97 | 65.29 | 66.81 | 57.90 | 50.06 | 29.90 | 22.06 | 44.65 | |||||||||||
2016 | 24.32 | 27.00 | 33.00 | 40.33 | 48.26 | 62.07 | 67.47 | a | 64.42 | 50.50 | 44.40 | a | 33.53 | 24.45 | 43.31 | |||||||||||
2017 | 27.35 | 30.36 | 33.77 | 38.10 | 45.81 | j | 57.60 | 69.29 | 64.45 | 57.50 | 35.68 | 31.20 | 17.42 | 42.07 | a | |||||||||||
2018 | 20.26 | 22.29 | 29.71 | 37.35 | d | 48.61 | m | ----- | z | ----- | z | ----- | z | ----- | z | 44.35 | n | 26.54 | b | 25.52 | 26.94 | f | ||||
2019 | 27.80 | k | 26.14 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.29 | 25.65 | 31.68 | 39.05 | 48.76 | 58.09 | 66.68 | 64.24 | 54.23 | 41.04 | 29.29 | 21.22 | 41.60 | |||||||||||||
S.D. | 4.43 | 3.57 | 2.96 | 2.36 | 2.40 | 2.79 | 2.99 | 2.93 | 3.05 | 3.13 | 2.37 | 4.17 | 1.66 | |||||||||||||
SKEW | 0.12 | -0.05 | -0.32 | 0.38 | -0.27 | -0.07 | 0.12 | -0.22 | -0.45 | -0.01 | -0.11 | -1.01 | -0.22 | |||||||||||||
MAX | 31.52 | 33.44 | 37.29 | 45.07 | 52.93 | 63.64 | 74.07 | 69.73 | 60.28 | 50.06 | 34.70 | 28.07 | 45.06 | |||||||||||||
MIN | 9.61 | 18.11 | 24.07 | 34.23 | 43.26 | 52.50 | 60.45 | 56.42 | 44.15 | 34.10 | 22.08 | 8.52 | 37.69 | |||||||||||||
YRS | 69 | 69 | 67 | 69 | 68 | 70 | 69 | 70 | 69 | 67 | 69 | 69 | 53 |