YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.84 | 57.52 | 47.77 | 41.84 | 30.33 | 23.87 | 43.03 | f | ||||||
1956 | 24.26 | 20.93 | 27.36 | c | 31.93 | b | 41.52 | 52.60 | 54.87 | 51.68 | 46.93 | 38.00 | 22.73 | 19.97 | 36.06 | |||||||||||
1957 | 30.00 | 31.29 | 31.48 | 34.14 | a | 38.58 | 51.00 | 56.26 | 53.55 | 42.13 | 38.26 | 22.73 | 19.74 | 37.43 | ||||||||||||
1958 | 18.19 | 24.96 | 25.39 | 32.13 | 37.61 | 48.80 | 49.84 | 50.55 | 45.37 | 34.87 | 22.50 | 15.71 | 33.83 | |||||||||||||
1959 | 18.32 | 19.18 | 22.39 | 32.53 | 39.18 | c | 50.17 | 52.97 | 53.90 | 44.07 | ----- | z | 27.47 | 19.39 | 34.51 | a | ||||||||||
1960 | 13.35 | 18.76 | 28.58 | 34.50 | 39.35 | 48.40 | 55.55 | 53.81 | 49.17 | 38.29 | 29.37 | 21.19 | 35.86 | |||||||||||||
1961 | 22.58 | 23.50 | 29.74 | 34.13 | 40.45 | 50.90 | 54.06 | 53.68 | 48.57 | 35.35 | 26.90 | 24.90 | 37.06 | |||||||||||||
1962 | 20.35 | 27.07 | 24.74 | 36.53 | 40.39 | 44.80 | 55.77 | 52.35 | 50.97 | 39.00 | 32.00 | 27.77 | 37.65 | |||||||||||||
1963 | 22.52 | 25.22 | a | 28.26 | 34.63 | 40.81 | 47.07 | 56.23 | 55.00 | 50.70 | ----- | z | ----- | z | 21.19 | 38.16 | b | |||||||||
1964 | 19.29 | 17.28 | 27.52 | 33.93 | 38.29 | 46.93 | 56.16 | 54.87 | 49.10 | 37.48 | 27.07 | 24.65 | 36.05 | |||||||||||||
1965 | 25.03 | 22.86 | 26.87 | 34.90 | 39.06 | 44.00 | 55.39 | 52.84 | 47.27 | 33.45 | 31.70 | 27.19 | 36.71 | |||||||||||||
1966 | 17.42 | 19.93 | 26.74 | 33.67 | 41.23 | 47.77 | 56.39 | 55.00 | 48.17 | 33.68 | 30.47 | 21.71 | 36.01 | |||||||||||||
1967 | 18.90 | 25.54 | 31.16 | 35.73 | 37.87 | 50.73 | 55.71 | 52.90 | 48.33 | 36.55 | 29.43 | 22.52 | 37.12 | |||||||||||||
1968 | 26.42 | 28.57 | a | 29.58 | 33.20 | 38.68 | 47.70 | 53.42 | 50.84 | 45.07 | 36.74 | 29.50 | 23.35 | 36.92 | ||||||||||||
1969 | 28.93 | a | 23.61 | 23.97 | 34.20 | 39.06 | 45.50 | 57.48 | 57.19 | 48.63 | 40.29 | 28.80 | 25.61 | 37.77 | ||||||||||||
1970 | 19.71 | 26.89 | 29.13 | 33.40 | 40.00 | 49.10 | 57.47 | a | 54.35 | 48.23 | 33.84 | 27.13 | 26.00 | 37.10 | ||||||||||||
1971 | 20.19 | 23.71 | 26.90 | 32.00 | 40.45 | 47.76 | a | 57.10 | 54.77 | a | 48.30 | 39.07 | a | 28.73 | 25.35 | 37.03 | ||||||||||
1972 | 20.93 | a | 22.48 | 32.23 | 32.70 | 38.94 | 48.80 | 56.52 | 53.61 | 48.93 | 43.19 | 26.77 | 23.65 | 37.40 | ||||||||||||
1973 | 22.23 | 26.43 | 27.16 | 29.03 | 39.74 | 47.07 | 54.00 | 50.74 | 44.70 | 34.42 | 27.47 | 21.50 | a | 35.37 | ||||||||||||
1974 | 24.03 | 18.93 | 31.48 | 32.30 | 40.03 | 50.87 | 54.61 | 51.61 | 49.67 | 39.84 | 26.97 | a | 20.58 | 36.74 | ||||||||||||
1975 | 22.29 | 21.57 | 30.06 | 30.67 | 36.94 | 46.60 | 55.87 | 52.42 | 48.50 | 36.71 | 25.27 | 22.87 | 35.81 | |||||||||||||
1976 | 20.26 | 27.10 | 27.94 | 32.77 | 39.94 | 46.13 | 54.81 | 52.39 | 47.70 | 35.42 | 25.97 | 20.19 | 35.88 | |||||||||||||
1977 | 24.77 | 22.32 | 25.32 | 33.17 | 40.26 | 47.87 | 55.55 | 56.06 | 49.47 | 41.61 | 28.93 | a | 26.87 | 37.68 | ||||||||||||
1978 | 26.97 | 24.39 | 31.87 | 33.27 | 38.97 | 49.07 | 55.06 | 52.90 | 49.77 | 37.71 | 33.73 | 22.42 | 38.01 | |||||||||||||
1979 | 23.71 | 24.93 | 29.00 | 32.57 | 40.42 | 46.38 | a | 54.97 | 50.94 | 47.73 | 36.71 | 25.07 | 23.00 | 36.28 | ||||||||||||
1980 | 27.03 | 27.66 | 29.84 | 33.30 | 40.74 | 49.40 | 57.19 | 54.45 | 48.60 | 35.29 | 27.77 | 23.97 | 37.94 | |||||||||||||
1981 | 25.90 | 24.89 | 28.84 | 36.57 | 42.32 | 51.40 | 57.35 | 53.71 | 46.97 | 38.97 | 27.50 | 25.35 | 38.31 | |||||||||||||
1982 | 27.52 | 27.82 | 32.71 | 35.83 | a | 39.94 | 45.40 | 55.65 | 55.94 | 49.40 | 33.97 | 31.20 | 24.23 | 38.30 | ||||||||||||
1983 | 21.71 | 27.11 | 31.06 | 33.10 | 40.06 | 45.60 | 55.84 | 55.48 | 53.69 | a | 41.59 | b | 31.03 | 29.16 | 38.79 | |||||||||||
1984 | 23.30 | a | 21.59 | 28.07 | a | 34.77 | 43.87 | 51.87 | 56.16 | 56.23 | 48.90 | 41.19 | 28.93 | 28.58 | 38.62 | |||||||||||
1985 | 25.55 | 24.39 | 32.84 | 35.30 | 41.13 | a | 50.00 | 55.97 | 54.52 | 46.55 | a | 40.32 | 31.63 | 22.32 | 38.38 | |||||||||||
1986 | 23.03 | 27.64 | 31.68 | 39.73 | 41.81 | 51.57 | 54.90 | 56.68 | 46.83 | 38.10 | 31.57 | 25.29 | 39.07 | |||||||||||||
1987 | 20.27 | a | 24.86 | 27.84 | 34.50 | 41.55 | 48.27 | 54.26 | 53.71 | 47.10 | a | 42.61 | 27.21 | a | 20.00 | 36.85 | ||||||||||
1988 | 22.52 | 26.21 | 27.47 | a | 34.57 | 41.26 | 50.47 | 55.58 | 56.77 | a | 45.50 | 40.10 | 28.00 | 19.00 | a | 37.29 | ||||||||||
1989 | 20.68 | 26.93 | a | 30.06 | 34.87 | 40.39 | 46.60 | 55.32 | 53.90 | 46.80 | 36.13 | a | 25.67 | 17.68 | 36.25 | |||||||||||
1990 | 18.74 | 20.96 | a | 29.42 | 36.45 | a | 40.81 | 52.87 | 56.33 | a | 51.84 | 49.63 | 34.81 | 29.24 | a | 22.87 | 37.00 | |||||||||
1991 | 23.06 | 25.25 | 26.90 | a | 32.70 | 38.53 | a | 43.38 | a | 53.50 | a | 54.19 | 47.10 | 36.30 | a | 26.38 | a | 24.29 | 35.97 | |||||||
1992 | 20.65 | 26.59 | 29.90 | 34.00 | 42.84 | 46.03 | 53.29 | 52.53 | a | 46.03 | 37.74 | 23.27 | 24.87 | a | 36.48 | |||||||||||
1993 | 28.19 | 25.89 | 27.81 | 32.40 | 40.58 | 46.13 | 55.48 | 56.73 | a | 44.77 | 36.29 | 27.00 | 22.77 | 37.00 | ||||||||||||
1994 | 18.90 | 23.25 | 30.10 | 33.59 | c | 43.79 | b | 55.03 | 57.37 | a | 57.29 | 49.03 | 38.73 | a | 31.97 | 26.97 | 38.84 | |||||||||
1995 | 25.97 | 29.85 | a | 31.84 | 32.64 | b | 42.00 | 47.50 | 54.20 | a | 57.97 | a | 50.20 | 37.31 | b | 31.04 | b | 25.17 | a | 38.81 | ||||||
1996 | 24.23 | 31.28 | 29.90 | 35.63 | 43.87 | 52.33 | 54.69 | b | 52.64 | c | 46.80 | 38.55 | 29.45 | a | 22.68 | 38.50 | ||||||||||
1997 | 25.43 | a | 25.50 | 29.65 | 35.23 | 44.29 | 48.17 | 55.58 | 56.35 | 51.95 | h | 36.00 | d | 28.12 | e | 23.86 | q | 38.43 | b | |||||||
1998 | 23.45 | 25.48 | a | 28.17 | b | 32.73 | 39.58 | 47.28 | a | 57.32 | 54.58 | 51.17 | 41.45 | 29.38 | a | 24.90 | 37.96 | |||||||||
1999 | 23.94 | 23.96 | 28.30 | a | 34.52 | a | 41.71 | 48.37 | 56.42 | 54.94 | 49.93 | 35.55 | 28.53 | 23.06 | 37.44 | |||||||||||
2000 | 24.58 | 27.54 | a | 28.35 | 35.43 | 44.03 | 53.31 | a | 55.59 | b | 54.19 | ----- | z | 40.87 | a | 25.97 | a | 23.06 | 37.54 | a | ||||||
2001 | 22.80 | a | 26.46 | 29.10 | 36.97 | 43.03 | 48.52 | g | 56.83 | m | 54.26 | 48.60 | 38.96 | c | 32.24 | a | 20.90 | 35.33 | b | |||||||
2002 | 23.29 | 23.54 | 29.03 | 37.52 | a | 39.77 | 51.37 | 57.81 | 54.33 | a | 50.00 | a | 38.00 | 28.77 | 23.68 | 38.09 | ||||||||||
2003 | 23.71 | 28.14 | 27.84 | 33.83 | 42.20 | a | 48.67 | 56.19 | 56.39 | 49.62 | a | 41.18 | c | 29.76 | a | 21.24 | b | 38.23 | ||||||||
2004 | 26.17 | b | 22.83 | 33.52 | b | 35.20 | 39.50 | g | 47.21 | k | 53.74 | d | 52.53 | a | 45.46 | b | 38.27 | e | 27.03 | a | 22.58 | e | 35.73 | b | ||
2005 | 26.63 | a | 31.39 | 29.40 | a | 31.85 | c | 42.00 | 47.11 | c | 55.31 | b | 55.23 | a | 50.03 | a | 37.63 | a | 27.11 | b | 20.79 | g | 39.43 | a | ||
2006 | 22.03 | 26.48 | a | 30.90 | 37.50 | 43.81 | d | 52.97 | a | 58.07 | a | 55.58 | 46.29 | i | 39.50 | a | 28.13 | o | 19.76 | f | 40.76 | c | ||||
2007 | 21.82 | c | 24.96 | b | 27.76 | b | 35.26 | k | 45.00 | c | 50.90 | 57.48 | 57.23 | 50.07 | 39.67 | a | 32.52 | a | 24.30 | a | 39.25 | a | ||||
2008 | ----- | z | 26.34 | 27.68 | 33.14 | a | 41.03 | 50.67 | 57.06 | 56.55 | 48.07 | c | 38.37 | a | 27.96 | g | 27.61 | c | 40.65 | b | ||||||
2009 | 24.35 | 26.92 | b | 30.83 | b | 33.29 | b | 44.93 | b | 50.75 | f | 57.75 | o | 55.60 | a | 48.88 | f | 40.84 | 34.55 | h | 27.09 | i | 36.68 | e | ||
2010 | 24.04 | c | 28.71 | 29.77 | a | 36.73 | 40.50 | a | 50.10 | 58.26 | 56.45 | b | 50.53 | 42.70 | a | 28.80 | 25.60 | f | 40.60 | a | ||||||
2011 | 21.81 | 23.71 | 31.10 | a | 40.80 | 40.07 | d | 50.10 | 58.45 | 58.53 | a | 50.93 | 41.47 | a | 32.87 | 26.71 | 39.71 | |||||||||
2012 | 24.42 | 27.34 | 28.52 | 36.62 | a | 44.77 | a | 53.21 | b | 58.40 | a | 57.74 | 50.43 | b | ----- | z | 33.24 | i | 26.55 | 40.80 | b | |||||
2013 | 20.90 | 21.68 | 31.97 | a | 35.41 | a | 42.55 | 52.47 | 58.13 | a | 56.67 | d | 52.20 | 39.42 | 32.90 | 25.93 | a | 39.19 | ||||||||
2014 | 23.86 | b | 30.71 | 31.61 | 36.33 | 40.26 | 53.13 | 58.03 | a | 55.90 | 54.87 | 42.55 | 30.52 | a | 29.97 | 40.65 | ||||||||||
2015 | 24.83 | a | 33.75 | 35.55 | 36.80 | 41.06 | 52.96 | c | 58.33 | a | 58.03 | 53.63 | 46.84 | 31.41 | a | 23.03 | b | 41.35 | ||||||||
2016 | 23.37 | a | 27.17 | 32.35 | 36.27 | 42.74 | 54.23 | 59.52 | 55.48 | 50.80 | 43.81 | 35.46 | b | 28.68 | c | 40.82 | ||||||||||
2017 | 26.19 | 29.14 | 36.19 | 38.63 | 44.13 | 53.77 | 58.84 | 55.45 | 49.53 | 45.19 | 37.43 | 29.03 | 41.96 | |||||||||||||
2018 | 24.10 | 30.64 | 32.77 | 40.50 | 44.10 | 53.13 | 58.65 | 57.78 | h | 50.73 | o | 42.53 | p | 27.50 | n | 27.73 | t | 40.56 | e | |||||||
2019 | 24.62 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.70 | d | 34.88 | n | 32.50 | s | 40.70 | k |
2020 | 25.94 | n | 25.36 | o | 33.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.97 | k | |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.06 | 25.43 | 29.46 | 34.57 | 41.05 | 49.36 | 56.02 | 54.64 | 48.56 | 38.68 | 28.87 | 23.75 | 37.62 | |||||||||||||
S.D. | 3.05 | 3.37 | 2.60 | 2.23 | 1.97 | 2.82 | 1.73 | 2.00 | 2.37 | 2.94 | 3.02 | 2.99 | 1.57 | |||||||||||||
SKEW | -0.37 | -0.09 | 0.03 | 0.59 | 0.30 | 0.00 | -0.59 | -0.15 | 0.01 | 0.34 | 0.17 | -0.12 | 0.59 | |||||||||||||
MAX | 30.00 | 33.75 | 36.19 | 40.80 | 45.00 | 55.03 | 59.52 | 58.53 | 54.87 | 46.84 | 37.43 | 29.97 | 41.96 | |||||||||||||
MIN | 13.35 | 17.28 | 22.39 | 29.03 | 36.94 | 43.38 | 49.84 | 50.55 | 42.13 | 33.45 | 22.50 | 15.71 | 33.83 | |||||||||||||
YRS | 62 | 63 | 64 | 62 | 62 | 60 | 62 | 63 | 59 | 61 | 58 | 58 | 49 |