YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.15 | q | 57.58 | 55.06 | 45.57 | 41.55 | 33.13 | 21.61 | 42.42 | f | ||||||
1966 | 16.10 | 15.21 | 29.80 | p | 33.17 | 44.23 | 49.97 | a | 58.67 | d | 57.16 | 49.67 | 36.65 | 31.20 | 19.48 | 37.41 | a | |||||||||
1967 | 15.97 | 20.61 | 29.04 | c | 29.97 | a | 41.14 | c | 48.18 | b | 59.72 | b | 57.38 | b | 48.86 | a | 39.36 | c | 30.87 | 12.56 | d | 36.14 | ||||
1968 | 11.87 | h | 25.63 | b | 27.45 | k | 26.62 | a | 37.40 | k | 54.35 | d | 59.58 | 53.66 | b | 47.36 | h | 40.72 | b | 26.73 | 12.32 | 37.45 | d | |||
1969 | 18.84 | 21.14 | 21.32 | 34.93 | 45.68 | 49.73 | 58.84 | 59.13 | a | 52.13 | 32.94 | 30.10 | a | 22.10 | 37.24 | |||||||||||
1970 | 19.40 | a | 24.54 | 20.16 | 28.03 | 42.29 | 52.93 | 60.03 | 59.37 | d | 45.50 | 34.48 | b | 28.70 | 20.48 | 36.33 | ||||||||||
1971 | 20.13 | 21.36 | 25.39 | 33.00 | 39.00 | 52.80 | 60.58 | 58.23 | a | 46.73 | 34.97 | 25.53 | 18.06 | 36.32 | ||||||||||||
1972 | 18.55 | 23.97 | 33.32 | 34.83 | 42.52 | 52.20 | 59.97 | 56.45 | 48.90 | 41.10 | 24.93 | 15.35 | 37.67 | |||||||||||||
1973 | 10.35 | 21.29 | 25.48 | 30.27 | 42.52 | 50.60 | 57.68 | 56.77 | 47.73 | 39.26 | 29.83 | 20.35 | 36.01 | |||||||||||||
1974 | 13.43 | a | 17.71 | 31.68 | 33.73 | 46.58 | 57.47 | 58.81 | 54.81 | 49.17 | 41.23 | 28.73 | 17.52 | 37.57 | ||||||||||||
1975 | 15.81 | 20.29 | 25.29 | 28.33 | 39.00 | 48.70 | 57.90 | 55.84 | 49.47 | 37.65 | 24.87 | 16.58 | 34.98 | |||||||||||||
1976 | 16.90 | 27.79 | 23.97 | 34.00 | 44.10 | 50.53 | 59.32 | 55.39 | 49.30 | 34.71 | 24.87 | 20.52 | 36.78 | |||||||||||||
1977 | 15.55 | 23.29 | 20.94 | 36.47 | 38.74 | 54.43 | 58.68 | 57.81 | 50.60 | 39.61 | 31.23 | 25.58 | 37.74 | |||||||||||||
1978 | 22.55 | 22.79 | 32.81 | 35.37 | 40.23 | 53.13 | 58.58 | 55.53 | a | 49.70 | 43.33 | a | 30.57 | 13.13 | 38.14 | |||||||||||
1979 | 13.00 | 18.68 | 27.77 | 34.70 | 42.68 | 51.63 | 61.39 | 56.81 | 53.57 | 43.35 | 22.27 | 20.16 | 37.17 | |||||||||||||
1980 | 23.52 | 25.79 | 25.73 | a | 33.57 | 40.29 | 52.03 | 59.90 | 55.77 | 51.30 | c | 36.87 | 28.97 | 27.48 | 38.44 | |||||||||||
1981 | 24.39 | 23.68 | 27.19 | 37.43 | 41.19 | 54.13 | 59.58 | 55.87 | 50.33 | c | 37.71 | 30.87 | 22.26 | 38.72 | ||||||||||||
1982 | 17.23 | 20.71 | 28.45 | b | 32.73 | 41.97 | 50.17 | 56.77 | a | 57.43 | a | 50.70 | c | 32.53 | a | 25.93 | 20.80 | a | 36.29 | |||||||
1983 | 20.61 | c | 24.79 | 28.77 | a | 28.34 | a | 39.82 | c | 48.60 | 54.74 | 56.27 | a | 49.33 | c | 38.68 | 27.62 | a | 20.42 | 36.50 | ||||||
1984 | 13.77 | 17.76 | 26.28 | b | 29.27 | 44.57 | a | 50.03 | 58.55 | 56.90 | 51.13 | 33.52 | 26.83 | a | 21.67 | a | 35.86 | |||||||||
1985 | 18.03 | a | 16.82 | 27.32 | 36.07 | a | 45.13 | a | 53.60 | 59.97 | 57.61 | 43.38 | d | 37.93 | d | 27.41 | a | 21.90 | 37.10 | |||||||
1986 | 24.97 | 26.68 | 32.35 | 34.50 | 41.07 | b | 52.90 | 56.00 | 57.87 | 45.81 | c | 36.29 | 28.93 | 21.80 | a | 38.26 | ||||||||||
1987 | 16.43 | c | 24.04 | 25.65 | 38.10 | 44.84 | 54.83 | 56.35 | 56.16 | 50.07 | a | 42.93 | a | 28.07 | a | 18.46 | e | 37.99 | ||||||||
1988 | 14.24 | b | 23.32 | a | 25.97 | 34.83 | a | 43.26 | 55.13 | 60.52 | 57.77 | 47.79 | b | 44.13 | 27.70 | 17.43 | a | 37.67 | ||||||||
1989 | 13.63 | a | 20.75 | 32.90 | 40.14 | a | 45.35 | 52.63 | 60.37 | a | 55.76 | b | 49.97 | 38.34 | b | 29.17 | 19.41 | b | 38.20 | |||||||
1990 | 18.07 | b | 23.54 | b | 30.90 | b | 38.18 | b | 42.73 | a | 56.20 | 59.61 | 57.84 | 53.67 | 37.97 | 27.48 | a | 11.43 | a | 38.13 | ||||||
1991 | 14.29 | 23.89 | 26.65 | 31.57 | 41.74 | 52.03 | 59.68 | 58.48 | 51.03 | 41.32 | 27.50 | 17.94 | 37.18 | |||||||||||||
1992 | 14.26 | 25.59 | 32.00 | 40.83 | 45.55 | 52.92 | q | 56.87 | a | 57.69 | b | 51.79 | a | 42.20 | a | 23.55 | a | 16.16 | f | 39.03 | b | |||||
1993 | 22.17 | b | 23.19 | a | 30.77 | 34.41 | a | 45.35 | 50.97 | 56.65 | 55.19 | 47.90 | a | 36.53 | a | 24.37 | 18.00 | d | 37.13 | |||||||
1994 | 20.71 | 20.27 | b | 31.97 | 36.90 | 46.03 | 58.37 | 60.61 | 60.10 | 51.10 | 37.77 | 23.00 | c | 22.97 | b | 39.15 | ||||||||||
1995 | 21.10 | b | 30.12 | b | 30.77 | 33.60 | 39.60 | a | 48.97 | 58.42 | 59.94 | 50.72 | a | 38.23 | 31.21 | b | 24.54 | e | 38.93 | |||||||
1996 | 19.83 | b | 27.03 | 29.48 | 35.20 | 46.26 | 55.87 | 62.77 | 59.87 | 48.00 | a | 39.07 | a | 31.81 | d | 24.72 | b | 39.99 | ||||||||
1997 | 22.00 | b | 23.46 | b | 31.57 | a | 32.17 | 47.71 | 52.47 | 57.90 | a | 57.87 | a | 52.83 | a | 37.37 | a | 28.93 | 19.58 | g | 40.39 | a | ||||
1998 | 23.06 | 22.19 | a | 28.84 | 32.30 | 42.74 | 47.50 | 60.65 | 59.58 | 52.70 | 37.68 | 28.53 | 19.77 | a | 37.96 | |||||||||||
1999 | 23.33 | d | 25.79 | 31.97 | 31.80 | 42.13 | 52.63 | 59.55 | 56.68 | 48.23 | 39.84 | 32.69 | a | 19.90 | 38.71 | |||||||||||
2000 | 23.84 | 27.83 | 29.39 | 39.20 | 47.52 | 55.80 | 59.16 | 60.71 | 50.48 | a | 39.55 | 21.63 | 21.87 | a | 39.75 | |||||||||||
2001 | 18.83 | a | 23.79 | 30.81 | 36.30 | 46.97 | a | 54.70 | 59.97 | 58.42 | 54.30 | 42.53 | a | 30.75 | b | 18.19 | 39.63 | |||||||||
2002 | 18.19 | d | 19.54 | 26.37 | a | 38.17 | 44.35 | 56.63 | 62.39 | 58.26 | 50.80 | 36.97 | a | 27.66 | a | 19.90 | 38.27 | |||||||||
2003 | 26.28 | b | 23.22 | a | 28.39 | 32.93 | a | 46.74 | d | 54.93 | 63.48 | 60.42 | 51.48 | a | 44.23 | 27.30 | 21.68 | c | 40.09 | |||||||
2004 | 16.86 | b | 19.62 | 34.74 | 35.27 | 45.23 | 53.90 | 58.74 | 55.71 | 49.07 | 39.58 | 27.97 | 21.27 | a | 38.16 | |||||||||||
2005 | 25.97 | a | 26.89 | 29.19 | 34.50 | d | 44.52 | b | 50.07 | 61.43 | a | 55.26 | 50.31 | a | 40.19 | 29.79 | a | 19.48 | 38.97 | |||||||
2006 | 19.73 | a | 21.11 | 27.90 | 35.93 | b | 47.43 | c | 56.75 | b | 62.59 | b | 57.71 | 45.59 | a | 36.83 | a | 29.75 | b | 20.31 | b | 38.47 | ||||
2007 | 15.00 | c | 25.04 | 30.07 | b | 35.60 | 44.94 | 54.27 | 62.06 | 59.40 | a | 49.96 | g | 38.69 | b | 32.00 | a | 18.68 | 37.79 | a | ||||||
2008 | 12.07 | d | 23.19 | b | 27.19 | 30.23 | 39.87 | 49.50 | 60.65 | 56.23 | 50.10 | 38.97 | 32.17 | 19.26 | 36.62 | |||||||||||
2009 | 21.10 | 24.89 | 27.94 | 31.57 | 47.54 | c | 51.23 | 58.67 | a | 57.89 | d | 52.50 | 34.48 | 29.17 | a | 12.40 | a | 37.45 | ||||||||
2010 | 18.25 | c | 20.24 | c | 27.35 | 34.00 | d | 39.26 | 53.30 | 60.35 | 56.10 | 52.96 | c | 41.30 | a | 29.19 | c | 25.35 | k | 39.30 | a | |||||
2011 | 14.79 | c | 19.89 | 30.69 | b | 33.31 | d | 38.80 | a | 52.50 | 59.94 | 59.81 | 52.87 | 38.22 | d | 27.14 | b | 18.65 | h | 38.90 | a | |||||
2012 | 21.84 | 21.10 | 29.60 | a | 37.66 | a | 47.23 | a | 56.80 | 57.73 | a | 59.77 | 51.38 | a | 39.55 | 32.00 | a | 21.44 | d | 39.68 | ||||||
2013 | 14.07 | a | 20.48 | e | 32.30 | d | 35.81 | d | 43.09 | h | 57.33 | c | 62.32 | 60.26 | 52.19 | c | 39.00 | q | 29.41 | h | 15.79 | g | 41.84 | d | ||
2014 | 22.21 | c | 26.42 | b | 28.83 | b | 34.85 | d | 42.70 | a | 50.60 | 58.13 | 51.00 | b | 53.46 | d | 39.52 | b | 27.07 | b | 22.80 | a | 38.13 | |||
2015 | 23.55 | b | 26.64 | 30.65 | 30.29 | b | 42.29 | 55.82 | b | 58.00 | 59.16 | 53.80 | 44.32 | 26.30 | 18.90 | a | 39.14 | |||||||||
2016 | 17.79 | b | 23.61 | a | 30.79 | b | 34.33 | 41.45 | 58.37 | 60.06 | 55.71 | 49.70 | 43.03 | 33.48 | a | 21.29 | 39.14 | |||||||||
2017 | 21.35 | 28.39 | 33.58 | 34.87 | 42.87 | 56.47 | 60.94 | 57.55 | 49.67 | 37.16 | 32.77 | 23.00 | 39.88 | |||||||||||||
2018 | 23.00 | 23.54 | 28.45 | 38.70 | 45.57 | a | 56.00 | 62.32 | 60.06 | 53.07 | 38.19 | 26.20 | 19.81 | 39.58 | ||||||||||||
2019 | 19.26 | 18.07 | 29.48 | 34.63 | 34.52 | 49.20 | 59.48 | 58.90 | 51.20 | 30.39 | 28.20 | 20.35 | 36.14 | |||||||||||||
2020 | 16.90 | 20.86 | 30.23 | 30.83 | a | ----- | z | 53.93 | c | 58.81 | 62.74 | 52.03 | 41.29 | 30.37 | 18.62 | b | 37.87 | a | ||||||||
2021 | 19.42 | 24.31 | b | 29.17 | a | 34.44 | c | 45.19 | d | 57.86 | b | 61.97 | 58.23 | 52.70 | 36.68 | 32.50 | 23.27 | a | 39.64 | |||||||
2022 | 19.03 | 19.81 | a | 28.00 | a | 35.97 | 43.81 | 54.50 | 61.28 | b | 58.61 | 56.75 | b | 38.45 | 23.10 | 19.77 | a | 38.26 | ||||||||
2023 | 19.58 | 17.57 | 23.55 | b | 33.43 | 44.58 | 49.30 | 61.68 | 57.77 | 50.87 | 41.10 | 29.63 | 22.48 | 37.63 | ||||||||||||
2024 | 21.13 | 25.28 | 29.55 | 35.28 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.81 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.83 | 22.80 | 28.72 | 34.13 | 43.26 | 53.08 | 59.57 | 57.55 | 50.39 | 38.78 | 28.45 | 19.84 | 37.94 | |||||||||||||
S.D. | 3.74 | 3.17 | 3.14 | 3.03 | 2.86 | 2.88 | 1.82 | 1.99 | 2.51 | 3.04 | 2.88 | 3.28 | 1.26 | |||||||||||||
SKEW | -0.07 | -0.10 | -0.64 | -0.25 | -0.51 | -0.00 | -0.16 | -0.30 | -0.39 | -0.31 | -0.38 | -0.66 | -0.17 | |||||||||||||
MAX | 26.28 | 30.12 | 34.74 | 40.83 | 47.71 | 58.37 | 63.48 | 62.74 | 56.75 | 44.32 | 33.48 | 27.48 | 40.09 | |||||||||||||
MIN | 10.35 | 15.21 | 20.16 | 26.62 | 34.52 | 47.50 | 54.74 | 51.00 | 43.38 | 30.39 | 21.63 | 11.43 | 34.98 | |||||||||||||
YRS | 58 | 59 | 57 | 59 | 55 | 57 | 59 | 59 | 57 | 58 | 58 | 54 | 49 |