YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | 39.77 | a | 36.23 | h | 25.41 | b | 32.59 | j |
1977 | 19.65 | 30.43 | 26.94 | 37.53 | 39.42 | 51.07 | 51.90 | ----- | z | 40.89 | l | 37.41 | b | 25.50 | b | 23.94 | 34.38 | b | ||||||||
1978 | 26.03 | 27.64 | 33.87 | 33.62 | a | 38.81 | 47.60 | 52.00 | i | 52.23 | 43.87 | 36.90 | 23.27 | 15.17 | a | 34.45 | a | |||||||||
1979 | 10.50 | a | 23.81 | a | 30.23 | a | 33.93 | 42.06 | 48.52 | a | 50.62 | r | 53.58 | l | 48.74 | k | 39.24 | j | 26.24 | a | 27.50 | c | 30.35 | d | ||
1980 | 16.93 | b | 29.03 | 26.81 | 37.73 | 40.86 | b | 45.86 | a | 54.45 | 49.29 | 48.13 | 39.29 | 31.23 | 29.84 | 37.46 | ||||||||||
1981 | 29.26 | 26.81 | a | 32.06 | 34.93 | a | 40.77 | 45.10 | 51.87 | 57.77 | 44.48 | g | 35.10 | a | 31.30 | c | 23.89 | c | 37.17 | a | ||||||
1982 | 20.19 | d | 17.09 | f | 28.21 | c | 30.73 | 39.70 | a | 50.50 | 53.26 | 55.00 | 46.30 | 36.77 | 26.83 | a | 23.97 | a | 37.41 | a | ||||||
1983 | 29.03 | 29.86 | 32.39 | 33.70 | 43.13 | 46.57 | 51.19 | 58.00 | 43.70 | 40.23 | 31.21 | a | 15.16 | 37.85 | ||||||||||||
1984 | 22.90 | 26.48 | 31.52 | 32.20 | 38.55 | 45.70 | 55.03 | 55.65 | 43.57 | 33.77 | a | 28.57 | b | 18.23 | a | 36.01 | ||||||||||
1985 | 17.70 | a | 17.71 | 26.26 | 37.10 | 42.65 | 48.20 | 60.10 | 50.32 | 41.86 | a | 35.73 | a | 17.80 | 19.17 | b | 34.55 | |||||||||
1986 | 27.47 | a | 26.37 | a | 35.06 | 33.50 | 43.52 | 53.97 | a | 51.06 | 59.03 | 42.87 | 40.29 | 28.30 | 24.42 | 38.82 | ||||||||||
1987 | 20.61 | 28.75 | 29.74 | 39.47 | 44.97 | a | 51.20 | 53.74 | 51.55 | 51.10 | 42.29 | 32.03 | 24.00 | 39.12 | ||||||||||||
1988 | 21.68 | 28.28 | 28.90 | 36.80 | 40.13 | 49.90 | 54.19 | 53.97 | 47.10 | 45.19 | 29.80 | 22.58 | 38.21 | |||||||||||||
1989 | 22.48 | 16.50 | 28.47 | a | 36.77 | 39.61 | 48.87 | 55.03 | 51.58 | 47.90 | 37.58 | 32.07 | a | 26.81 | 36.97 | |||||||||||
1990 | 24.00 | a | 23.85 | b | 30.67 | a | 39.73 | 39.03 | 47.60 | 57.00 | 55.87 | 53.67 | 36.32 | 30.86 | a | 13.63 | a | 37.69 | ||||||||
1991 | 20.94 | 33.57 | 28.68 | 34.37 | 39.45 | 43.70 | 55.39 | 58.03 | 49.21 | a | 38.00 | 27.93 | a | 25.90 | a | 37.93 | ||||||||||
1992 | 25.68 | 32.29 | a | 35.39 | 38.14 | a | 45.03 | 52.93 | 51.06 | 55.23 | e | 46.73 | 41.30 | a | 27.73 | 21.07 | a | 39.38 | ||||||||
1993 | 15.92 | e | 19.43 | 31.57 | a | 33.66 | a | 46.07 | a | 45.93 | a | 45.71 | 50.81 | 47.00 | 40.71 | 23.83 | a | 25.82 | c | 35.54 | ||||||
1994 | 29.36 | c | 21.89 | a | 31.20 | a | 38.03 | 43.06 | 46.67 | 57.35 | 55.35 | 50.67 | 37.13 | 23.27 | 21.50 | a | 37.96 | |||||||||
1995 | 22.76 | f | 28.00 | a | 28.11 | d | 33.24 | a | 42.90 | 45.87 | 53.84 | 50.23 | 49.30 | 35.77 | 32.79 | b | 24.07 | a | 38.56 | a | ||||||
1996 | 22.79 | b | 21.62 | 30.29 | 35.07 | 38.61 | 47.50 | 54.94 | 55.07 | a | 45.63 | 37.97 | 29.27 | 23.55 | 36.86 | |||||||||||
1997 | 23.47 | a | 25.32 | 29.16 | 32.80 | 43.45 | 46.07 | a | 51.94 | 54.97 | 48.63 | c | 34.61 | 31.53 | 22.17 | b | 37.01 | |||||||||
1998 | 23.69 | e | 27.28 | c | 29.23 | 33.90 | 41.06 | 45.83 | 59.32 | 55.93 | a | 52.13 | 36.61 | 31.80 | 20.96 | e | 38.15 | |||||||||
1999 | 26.79 | b | 23.62 | l | 28.25 | c | 30.80 | 36.90 | a | 43.83 | 49.68 | 56.13 | 44.73 | 38.68 | c | 34.60 | e | 24.04 | d | 37.68 | a | |||||
2000 | 24.07 | c | 29.26 | b | 30.48 | h | 36.80 | 40.19 | 47.33 | 54.16 | 54.71 | 44.10 | 37.97 | a | 24.32 | b | 21.72 | b | 37.69 | a | ||||||
2001 | 22.27 | a | 23.75 | 30.19 | 33.30 | 42.45 | 46.11 | b | 54.94 | 57.52 | 50.24 | a | 37.90 | b | 33.60 | 21.54 | c | 37.82 | ||||||||
2002 | 23.59 | b | 23.00 | a | 25.97 | a | 34.80 | 40.16 | 49.50 | 57.97 | 52.61 | 48.37 | 35.13 | 31.77 | 27.17 | b | 37.50 | |||||||||
2003 | 29.87 | 24.96 | 32.13 | 35.10 | 41.16 | 50.53 | 59.58 | 57.58 | 50.40 | 42.77 | 25.10 | 26.55 | 39.65 | |||||||||||||
2004 | 24.32 | 27.18 | a | 32.66 | b | 36.80 | 41.29 | 49.13 | 57.19 | 55.83 | a | 46.00 | 39.52 | 30.30 | 28.83 | a | 39.09 | |||||||||
2005 | 26.19 | 26.64 | 32.00 | a | 34.10 | 43.42 | 45.60 | 56.61 | 55.97 | 46.40 | 40.19 | 28.50 | 22.26 | 38.16 | ||||||||||||
2006 | 28.90 | 23.04 | 28.90 | 35.90 | 43.52 | 50.57 | 59.23 | 54.19 | 48.53 | 37.48 | 28.70 | 24.63 | a | 38.63 | ||||||||||||
2007 | 19.48 | 28.39 | 32.94 | 35.70 | 42.52 | 48.00 | 61.23 | 54.90 | 47.14 | a | 37.90 | 28.68 | b | 23.40 | a | 38.36 | ||||||||||
2008 | 19.70 | a | 27.66 | 26.81 | 29.60 | 41.55 | 46.67 | 55.77 | 55.00 | 47.47 | 39.71 | 34.53 | 19.48 | 37.00 | ||||||||||||
2009 | 22.57 | a | 27.04 | 25.81 | 33.77 | ----- | z | 48.93 | 56.65 | 55.73 | a | 51.10 | a | 35.35 | 30.37 | 18.65 | 36.91 | a | ||||||||
2010 | 29.67 | a | 29.54 | 31.17 | a | 34.55 | a | 38.42 | 46.14 | b | 54.14 | b | 53.70 | a | ----- | z | ----- | z | ----- | z | 26.39 | 38.19 | c | |||
2011 | 24.43 | c | 21.76 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.09 | j |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | 22.94 | 27.54 | 31.29 | 34.83 | 42.65 | 48.70 | 60.97 | a | 56.68 | 51.13 | 36.35 | 30.27 | ----- | z | 40.30 | a | ||||||||||
2014 | 26.23 | 22.46 | 31.13 | 34.80 | 43.03 | 47.63 | ----- | z | 57.57 | a | 49.73 | 42.74 | l | 28.03 | 27.87 | 36.85 | b | |||||||||
2015 | 28.03 | 32.04 | 35.77 | 34.70 | 44.52 | 56.70 | 58.35 | 57.94 | 47.57 | 45.16 | 27.00 | 24.58 | 41.03 | |||||||||||||
2016 | 25.94 | 31.34 | 31.19 | 41.13 | 43.74 | 49.63 | 53.87 | 55.06 | 47.00 | 40.39 | 36.60 | 17.68 | 39.47 | |||||||||||||
2017 | 17.48 | 26.18 | 32.84 | ----- | z | 42.32 | 50.03 | a | 60.55 | 59.52 | 49.67 | 36.74 | 31.87 | 22.16 | 39.03 | a | ||||||||||
2018 | 29.77 | 23.75 | 30.00 | 35.53 | 46.13 | 47.63 | 57.23 | 56.10 | 46.90 | 39.00 | 31.00 | 23.81 | 38.90 | |||||||||||||
2019 | 26.35 | 18.46 | 26.32 | 36.67 | 43.58 | 48.50 | 54.00 | 57.77 | 47.67 | 32.33 | a | 30.27 | 28.10 | 37.50 | ||||||||||||
2020 | 27.81 | 25.24 | 30.26 | 35.67 | 41.93 | a | 47.87 | 54.60 | a | 56.00 | 50.90 | 39.06 | 29.80 | 26.52 | 38.80 | |||||||||||
2021 | 27.42 | 22.46 | 29.61 | 35.37 | ----- | z | 54.23 | 62.94 | ----- | z | 49.43 | 39.71 | 33.00 | 23.87 | a | 37.80 | b | |||||||||
2022 | 25.39 | 23.71 | 32.29 | 30.03 | 38.55 | 48.53 | 58.77 | 59.77 | a | 52.37 | 43.16 | 22.63 | 20.94 | 38.01 | ||||||||||||
2023 | 24.26 | 23.57 | 25.16 | 32.45 | a | 46.38 | b | 49.52 | a | 57.97 | 58.00 | a | 48.53 | 40.84 | 31.43 | 29.87 | 39.00 | |||||||||
2024 | 24.65 | 30.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.32 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.88 | 25.86 | 30.17 | 34.99 | 41.80 | 48.37 | 55.59 | 55.34 | 47.92 | 38.47 | 29.22 | 23.31 | 38.01 | |||||||||||||
S.D. | 4.18 | 3.90 | 2.62 | 2.47 | 2.33 | 2.69 | 3.51 | 2.57 | 2.75 | 2.81 | 3.68 | 3.77 | 1.28 | |||||||||||||
SKEW | -0.79 | -0.34 | 0.06 | 0.10 | 0.03 | 0.89 | -0.25 | -0.56 | -0.18 | 0.37 | -0.75 | -0.57 | -0.43 | |||||||||||||
MAX | 29.87 | 33.57 | 35.77 | 41.13 | 46.38 | 56.70 | 62.94 | 59.77 | 53.67 | 45.19 | 36.60 | 29.87 | 41.03 | |||||||||||||
MIN | 10.50 | 16.50 | 25.16 | 29.60 | 36.90 | 43.70 | 45.71 | 49.29 | 41.86 | 32.33 | 17.80 | 13.63 | 34.55 | |||||||||||||
YRS | 46 | 45 | 44 | 44 | 43 | 45 | 42 | 42 | 41 | 43 | 44 | 45 | 31 |