YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.64 | e | 41.24 | n | 32.44 | l | 18.59 | i | 52.64 | k |
1954 | 22.29 | j | 27.94 | j | 29.43 | h | 42.43 | g | 49.95 | k | 56.13 | g | 64.46 | g | 59.18 | i | 54.19 | i | 43.23 | i | 29.50 | j | 18.27 | i | ----- | z |
1955 | 19.90 | j | 19.67 | j | 28.61 | h | 36.81 | i | 43.62 | j | 53.55 | h | 60.24 | j | 60.79 | g | 51.32 | h | 41.14 | j | 27.10 | j | 23.38 | j | ----- | z |
1956 | 25.33 | j | 19.35 | i | 26.55 | i | 33.81 | i | 47.59 | i | 59.43 | i | 59.90 | j | 56.43 | h | 51.47 | k | 40.26 | h | 20.68 | k | 20.11 | m | ----- | z |
1957 | 25.73 | i | 31.00 | i | 32.55 | i | 35.36 | h | 44.38 | j | 55.60 | j | 61.77 | i | 60.45 | i | 48.55 | j | 42.22 | h | 28.61 | l | 22.40 | k | ----- | z |
1958 | 19.55 | i | 28.55 | h | 28.76 | j | 39.43 | g | 51.38 | b | 58.97 | 59.68 | f | 60.67 | j | 52.38 | i | 39.00 | h | 26.22 | l | 20.62 | j | 55.17 | j | |
1959 | 19.33 | j | 23.25 | h | 27.41 | i | 37.36 | h | 45.67 | j | 57.91 | h | 59.77 | i | 61.44 | m | 49.85 | j | 40.05 | j | 26.32 | k | 24.55 | i | ----- | z |
1960 | 18.40 | k | 20.95 | i | 29.43 | h | 39.48 | i | 45.65 | k | 57.14 | h | 62.74 | l | 60.96 | h | 55.33 | i | 39.10 | j | 28.75 | j | 20.71 | j | ----- | z |
1961 | 16.57 | j | 23.21 | i | 29.70 | h | 34.90 | j | 46.14 | i | 59.26 | g | 63.05 | i | 62.35 | h | 49.85 | j | 38.00 | i | 29.40 | j | 20.79 | l | ----- | z |
1962 | 18.59 | i | 29.05 | i | 25.86 | i | 40.33 | i | 44.00 | f | 56.05 | i | 60.90 | j | 60.13 | h | 55.74 | k | 43.39 | h | 33.80 | j | 24.26 | l | ----- | z |
1963 | 16.91 | i | 25.21 | i | 29.33 | j | 33.73 | h | 48.27 | i | 55.40 | j | 64.41 | i | 61.86 | i | 56.85 | j | 45.70 | h | 31.33 | l | 19.19 | j | ----- | z |
1964 | 14.77 | i | 15.16 | j | 26.59 | i | 35.23 | h | 48.60 | k | 55.23 | h | 64.14 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | 41.10 | 48.17 | a | ----- | z | 62.71 | c | 60.54 | c | 53.33 | c | 39.54 | c | 27.93 | c | 22.00 | e | 44.41 | d | |
2003 | 26.03 | 27.00 | d | 31.16 | 40.20 | 50.42 | 59.25 | b | 65.42 | 59.03 | 48.43 | b | 41.45 | 25.96 | d | 18.45 | 41.07 | |||||||||
2004 | 16.21 | c | 21.60 | d | 35.73 | a | 40.52 | a | 48.37 | a | 57.37 | 60.60 | a | 59.63 | a | 51.79 | a | 40.96 | d | 33.31 | a | 21.11 | c | 40.60 | ||
2005 | 28.52 | b | 32.54 | b | 31.40 | a | ----- | z | 45.16 | f | 55.20 | 65.42 | 62.19 | 54.34 | a | 43.56 | d | 29.41 | a | 21.11 | l | 44.73 | c | |||
2006 | 23.44 | d | 23.68 | c | 33.33 | a | 43.12 | e | 51.42 | e | 61.00 | c | 66.37 | d | 63.00 | d | 53.31 | a | 43.24 | f | 28.56 | c | 24.00 | g | 44.72 | b |
2007 | 18.35 | 24.85 | b | 31.10 | a | 36.18 | b | 48.00 | 58.07 | c | 65.25 | c | 64.37 | d | 55.62 | f | 42.08 | g | 30.41 | a | 24.04 | d | 40.06 | b | ||
2008 | 15.90 | a | 25.34 | 29.00 | 34.71 | b | 47.31 | b | 56.80 | e | 63.23 | e | 61.81 | 52.63 | 40.65 | 30.21 | a | 24.87 | 40.21 | |||||||
2009 | ----- | z | 23.79 | 32.97 | 38.74 | c | 52.10 | 56.30 | 64.83 | a | ----- | z | 52.83 | 43.04 | f | ----- | z | 18.65 | 42.53 | d | ||||||
2010 | 21.35 | ----- | z | ----- | z | 38.38 | a | ----- | z | 59.96 | b | 64.70 | a | ----- | z | ----- | z | ----- | z | 26.86 | a | 26.42 | 39.61 | f | ||
2011 | 18.83 | a | 17.79 | 33.24 | b | 38.63 | c | 45.59 | d | 57.79 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.31 | f | |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.33 | s | 63.32 | 53.90 | 41.16 | 27.57 | 19.90 | b | 41.17 | g | ||||
2013 | 15.21 | c | 22.32 | 30.58 | 38.67 | 48.58 | 61.23 | 63.42 | 62.71 | 56.10 | 37.68 | 30.53 | 20.77 | 40.65 | ||||||||||||
2014 | 20.13 | 27.61 | 31.35 | 37.70 | 45.58 | 59.80 | 64.13 | 58.55 | 57.37 | 43.68 | 28.60 | 26.43 | a | 41.74 | ||||||||||||
2015 | 23.42 | 27.14 | 34.42 | 38.47 | 46.19 | 59.93 | 61.68 | 61.77 | 56.73 | 47.03 | 29.20 | 22.13 | 42.34 | |||||||||||||
2016 | 21.65 | 26.24 | 32.32 | 38.03 | 45.94 | 61.07 | 64.70 | a | 59.16 | 53.20 | 44.97 | a | 34.47 | 22.77 | 42.04 | |||||||||||
2017 | 26.61 | 29.46 | 34.90 | 39.66 | a | 47.29 | 58.90 | 64.56 | f | 62.13 | 55.23 | 41.39 | 34.17 | 22.16 | 41.08 | a | ||||||||||
2018 | 20.19 | 27.64 | 33.58 | e | 41.00 | 51.00 | 60.87 | 64.26 | 61.52 | b | 55.00 | 45.00 | 27.03 | 22.32 | 42.45 | |||||||||||
2019 | 22.10 | 23.00 | 34.74 | 39.43 | 44.19 | 56.27 | 64.10 | a | 62.05 | k | 56.87 | 37.06 | 28.27 | 23.71 | 39.07 | a | ||||||||||
2020 | 23.19 | 25.34 | 34.71 | 40.70 | 50.33 | a | 56.47 | 64.58 | ----- | z | 51.38 | a | 39.48 | 32.03 | 19.84 | 39.82 | a | |||||||||
2021 | 23.37 | a | 23.32 | 29.45 | 37.31 | n | 48.97 | 61.47 | 63.79 | b | 61.39 | 56.57 | 40.14 | b | 32.67 | c | 24.15 | d | 42.30 | a | ||||||
2022 | 21.81 | 18.85 | b | 30.29 | 39.47 | 47.00 | h | 60.48 | a | ----- | z | 62.89 | c | 56.66 | a | 42.06 | 25.03 | 23.71 | c | 38.13 | b | |||||
2023 | 25.88 | g | 22.96 | 30.19 | 35.64 | b | 51.17 | a | 54.60 | e | 67.50 | a | 64.71 | 55.15 | c | 42.97 | 29.93 | 26.33 | a | 43.74 | a | |||||
2024 | 23.52 | 27.76 | 32.79 | b | 37.61 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.02 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.57 | 24.91 | 32.36 | 38.97 | 48.53 | 58.66 | 64.26 | 61.69 | 54.17 | 41.69 | 29.61 | 22.62 | 41.39 | |||||||||||||
S.D. | 3.60 | 3.49 | 1.97 | 2.03 | 2.37 | 2.12 | 1.61 | 1.81 | 2.27 | 2.63 | 2.66 | 2.47 | 0.87 | |||||||||||||
SKEW | -0.08 | -0.05 | 0.00 | -0.25 | -0.11 | -0.35 | -0.35 | -0.21 | -0.60 | 0.18 | 0.30 | -0.02 | -0.04 | |||||||||||||
MAX | 28.52 | 32.54 | 35.73 | 43.12 | 52.10 | 61.47 | 67.50 | 64.71 | 57.37 | 47.03 | 34.47 | 26.43 | 42.45 | |||||||||||||
MIN | 15.21 | 17.79 | 29.00 | 34.71 | 44.19 | 54.60 | 60.60 | 58.55 | 48.43 | 37.06 | 25.03 | 18.45 | 40.21 | |||||||||||||
YRS | 19 | 20 | 20 | 19 | 19 | 21 | 18 | 17 | 20 | 17 | 20 | 19 | 8 |