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 | 29.57 | h | ----- | z |
1951 | 16.32 | 25.46 | 23.03 | 27.80 | 37.65 | 40.07 | 49.67 | a | 47.65 | 37.77 | 30.58 | 20.90 | 15.26 | 31.01 | ||||||||||||
1952 | 7.45 | 20.03 | 24.74 | ----- | z | 40.58 | 46.40 | 53.08 | g | 48.70 | a | 38.97 | 26.83 | a | 10.69 | d | 19.91 | h | 29.38 | c | ||||||
1953 | 29.04 | c | 24.00 | c | 24.10 | j | 29.18 | b | 35.32 | l | 43.14 | b | 49.60 | a | 48.84 | f | 39.50 | l | 30.74 | l | ----- | z | 18.62 | w | 34.99 | g |
1954 | 25.53 | a | 28.17 | d | 20.88 | n | 33.04 | b | 39.67 | d | 45.92 | f | 51.54 | c | 46.68 | 36.86 | a | 27.74 | d | 24.00 | d | 15.46 | c | 32.87 | b | |
1955 | 14.63 | a | 16.00 | b | 23.21 | c | 29.85 | d | 38.87 | a | 46.10 | 47.41 | i | 42.68 | c | 36.63 | c | 26.00 | i | 19.31 | d | 23.63 | a | 29.09 | b | |
1956 | 21.96 | e | 13.69 | c | 24.46 | g | 27.71 | b | 29.38 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.31 | e | 19.92 | h |
1957 | 9.43 | a | 24.71 | 29.34 | b | ----- | z | ----- | z | ----- | z | ----- | z | 46.64 | c | 40.12 | f | 34.70 | d | 21.07 | a | 21.79 | l | 27.65 | f | |
1958 | ----- | z | ----- | z | ----- | z | 29.32 | e | 42.62 | e | 47.91 | g | 50.78 | d | 53.00 | i | 38.50 | b | 28.67 | a | 29.87 | o | 24.35 | h | 37.98 | g |
1959 | 21.72 | b | 19.50 | 19.63 | a | 30.57 | 34.50 | e | 47.30 | 50.19 | 46.16 | 44.00 | l | 32.35 | 15.33 | 8.55 | 29.62 | a | ||||||||
1960 | 11.20 | a | 21.96 | a | 27.84 | 31.15 | d | 36.61 | 43.86 | b | 53.35 | 43.07 | d | 37.79 | b | ----- | z | 24.61 | b | 13.11 | c | 31.32 | a | |||
1961 | 14.94 | 27.67 | a | 27.11 | c | 27.68 | b | 35.32 | c | 47.62 | a | 48.97 | 54.14 | c | 37.27 | 30.65 | 18.36 | b | 20.38 | b | 32.51 | |||||
1962 | ----- | z | 23.72 | c | 24.04 | d | ----- | z | 39.77 | a | 44.61 | b | 47.70 | a | 45.76 | b | 38.93 | 31.74 | 27.40 | 21.03 | 34.47 | b | ||||
1963 | 10.32 | 28.71 | 24.81 | 27.50 | 40.41 | b | 44.93 | 47.65 | 46.77 | 44.50 | 34.45 | 28.27 | 19.43 | a | 33.15 | |||||||||||
1964 | 18.52 | 19.03 | ----- | z | 28.50 | ----- | z | 46.59 | a | 51.55 | 46.52 | 35.63 | 29.77 | 22.53 | 25.16 | 32.38 | b | |||||||||
1965 | 21.87 | 22.86 | 20.30 | a | 35.23 | 36.40 | a | 45.24 | a | 48.61 | 48.71 | 34.83 | 29.94 | 27.90 | a | 14.52 | b | 32.20 | ||||||||
1966 | 20.29 | 20.32 | 24.13 | a | 27.27 | 40.14 | c | 45.47 | 49.19 | 49.12 | o | ----- | z | 26.00 | c | 29.13 | 22.19 | 30.41 | b | |||||||
1967 | 24.10 | 23.33 | a | 24.87 | 28.25 | b | 36.00 | a | 46.28 | a | 54.45 | 51.30 | a | 41.38 | i | 30.13 | a | 26.14 | a | 16.06 | 32.81 | a | ||||
1968 | 15.42 | 27.17 | ----- | z | 26.00 | b | 38.84 | 45.90 | 52.19 | 46.93 | a | 39.83 | ----- | z | 29.00 | a | 20.29 | c | 34.16 | b | ||||||
1969 | 22.07 | c | 24.32 | 24.17 | b | 31.28 | a | 41.52 | 46.48 | a | 50.77 | 46.03 | a | 39.17 | 27.84 | 16.60 | 20.41 | d | 32.56 | |||||||
1970 | 22.84 | 23.07 | a | 23.83 | a | 24.37 | 35.81 | 49.10 | 50.84 | 46.40 | a | 35.00 | b | 26.10 | 26.72 | a | 17.32 | f | 33.10 | a | ||||||
1971 | 22.97 | a | 20.29 | 20.13 | 25.85 | c | 36.87 | 43.20 | j | 49.90 | a | 49.13 | 32.50 | 30.03 | 22.58 | d | 16.73 | a | 29.73 | a | ||||||
1972 | 15.64 | c | 21.71 | a | 25.55 | 24.83 | 37.00 | 45.07 | 47.61 | 48.53 | a | 34.70 | 33.13 | a | 26.76 | a | 13.69 | b | 31.19 | |||||||
1973 | 17.19 | 24.61 | 25.74 | 27.86 | a | 37.87 | a | ----- | z | 52.81 | 46.29 | 38.48 | a | 30.38 | b | ----- | z | 27.03 | a | 32.83 | b | |||||
1974 | 16.31 | b | 22.00 | 26.10 | 29.86 | a | 37.39 | 47.45 | a | 52.03 | 48.10 | 36.07 | 28.68 | 24.77 | 21.71 | 32.54 | ||||||||||
1975 | 14.74 | 25.58 | b | 27.86 | c | 27.55 | a | 34.77 | 44.41 | a | 58.00 | 47.68 | 36.39 | g | 31.48 | 22.82 | b | 26.14 | c | 32.82 | a | |||||
1976 | 22.03 | 20.90 | 19.87 | 29.18 | b | 37.62 | b | 43.71 | b | 53.16 | 47.06 | 42.77 | 26.57 | a | 19.97 | 6.74 | 30.80 | |||||||||
1977 | 6.61 | 18.26 | a | 20.10 | 30.43 | 38.55 | b | 51.79 | a | 52.03 | 52.81 | 41.77 | 31.03 | a | 25.72 | a | 27.57 | a | 33.06 | |||||||
1978 | 25.77 | a | 28.50 | 32.60 | a | 34.23 | ----- | z | 43.97 | 52.19 | 49.68 | 38.57 | 27.45 | 18.47 | 14.42 | 33.26 | a | |||||||||
1979 | 7.32 | 25.04 | 27.55 | 30.72 | a | 39.47 | a | 46.79 | a | 52.10 | a | 51.26 | 41.70 | 34.57 | a | 19.37 | 19.48 | 32.95 | ||||||||
1980 | 21.71 | 28.14 | 24.71 | 33.47 | 41.38 | b | 43.37 | 53.29 | 46.65 | 42.59 | a | 31.17 | a | 24.34 | a | 17.54 | c | 34.03 | ||||||||
1981 | 25.55 | b | 23.36 | 24.81 | d | 32.93 | 38.84 | 46.10 | a | 48.68 | 48.58 | 40.00 | 30.39 | 27.37 | 26.06 | 34.39 | ||||||||||
1982 | 16.94 | 20.93 | 26.97 | a | 27.43 | 35.68 | 46.97 | a | 51.77 | a | 49.06 | 39.34 | a | 30.77 | a | 19.47 | 20.03 | b | 32.11 | |||||||
1983 | 23.97 | 29.96 | 29.39 | c | 29.07 | 37.30 | a | 43.57 | 47.23 | 52.17 | a | 38.21 | a | 32.84 | 30.10 | 19.48 | b | 34.44 | ||||||||
1984 | 7.03 | b | 17.04 | d | 31.67 | d | 30.00 | a | 40.69 | b | 43.55 | a | 53.79 | c | 49.33 | a | 37.34 | a | 31.45 | 27.07 | a | 11.47 | a | 31.70 | ||
1985 | 9.93 | a | 14.79 | 21.23 | 31.73 | 40.52 | 45.23 | 55.65 | 46.93 | a | ----- | z | 28.83 | a | 18.34 | a | 4.34 | b | 28.87 | a | ||||||
1986 | 19.77 | 33.40 | c | 32.48 | 32.21 | b | 38.81 | 49.53 | 49.52 | b | 52.20 | a | 40.07 | a | 27.61 | 24.93 | 16.47 | a | 34.75 | |||||||
1987 | 15.55 | b | 23.08 | c | 24.95 | k | 33.30 | 44.87 | a | 49.83 | 49.84 | 46.52 | 38.14 | a | 28.42 | 23.20 | 17.03 | a | 33.62 | a | ||||||
1988 | 17.29 | 21.96 | a | 26.48 | 35.19 | d | 39.97 | a | 51.48 | a | 53.35 | 46.84 | 38.50 | 34.35 | 28.43 | 19.74 | d | 34.47 | ||||||||
1989 | 16.57 | c | 18.88 | c | 33.07 | c | 35.35 | g | 37.84 | f | 46.97 | 50.05 | k | 48.65 | 39.57 | 31.55 | 19.67 | 13.66 | b | 29.84 | c | |||||
1990 | 18.72 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.73 | 8.32 | 16.59 | i | ||
1991 | 12.61 | 26.36 | 26.03 | 32.90 | 39.52 | 43.93 | 51.40 | a | 51.81 | 42.52 | a | 30.55 | 28.55 | a | 18.19 | 33.70 | ||||||||||
1992 | 22.13 | 24.89 | a | 25.97 | 31.97 | 41.45 | 48.03 | 48.68 | 49.80 | a | 38.37 | 31.06 | 24.17 | a | 18.63 | a | 33.76 | |||||||||
1993 | 9.03 | 16.64 | 31.48 | b | 32.57 | 41.07 | c | 42.50 | 46.39 | 44.39 | 38.20 | 32.97 | 11.07 | a | 20.00 | 30.53 | ||||||||||
1994 | 19.65 | 18.56 | a | 25.23 | 35.40 | 41.06 | 43.13 | 50.65 | 50.03 | 39.59 | a | 29.39 | 21.37 | 16.74 | 32.57 | |||||||||||
1995 | 25.26 | 27.32 | 25.84 | 28.62 | a | 39.13 | 43.31 | a | 48.26 | 42.70 | a | 40.43 | 27.54 | c | 29.39 | b | 24.16 | 33.50 | ||||||||
1996 | 24.00 | 22.10 | 26.84 | 32.03 | 38.84 | 44.68 | h | 50.43 | x | 45.46 | e | 38.93 | 32.87 | 27.79 | f | 22.42 | g | 32.64 | d | |||||||
1997 | 22.16 | 24.43 | 25.83 | a | 30.07 | 39.71 | 46.40 | 50.26 | 48.81 | 42.40 | 28.68 | 26.67 | ----- | z | 35.04 | a | ||||||||||
1998 | 26.90 | 24.43 | 28.03 | a | 33.93 | a | 40.07 | a | 43.14 | a | 54.97 | 50.29 | 47.00 | 29.42 | 31.18 | b | 16.84 | 35.52 | ||||||||
1999 | 20.97 | 28.37 | a | 27.87 | a | 31.20 | 37.72 | b | 47.30 | 49.06 | 49.71 | 36.17 | 27.17 | a | 26.55 | a | 17.47 | a | 33.30 | |||||||
2000 | 24.29 | 27.54 | e | 27.48 | 37.35 | d | 44.23 | 46.60 | 53.45 | 49.06 | 40.07 | 32.80 | a | 21.33 | 22.10 | a | 35.53 | |||||||||
2001 | 16.23 | 22.59 | a | 31.90 | 32.14 | a | 39.94 | 45.45 | a | 51.52 | 51.26 | 41.10 | 32.43 | a | 25.30 | 22.80 | a | 34.39 | ||||||||
2002 | 22.58 | 21.75 | 25.32 | 31.97 | 39.13 | 47.97 | 54.42 | 45.13 | 38.53 | 22.77 | 19.47 | 23.55 | b | 32.72 | ||||||||||||
2003 | 28.71 | 21.54 | 32.17 | a | 31.83 | 41.63 | a | 46.43 | 54.35 | 51.48 | 40.53 | 34.97 | a | 22.07 | b | 25.65 | 35.95 | |||||||||
2004 | 19.27 | a | 24.71 | a | 27.19 | 33.57 | 39.07 | b | 48.38 | a | 52.48 | d | 50.71 | c | 39.67 | 33.71 | 26.17 | 21.52 | b | 34.70 | ||||||
2005 | 22.13 | a | 21.44 | a | 25.55 | 31.83 | 41.19 | 41.83 | 51.28 | b | 49.53 | a | 37.27 | 31.21 | g | 23.59 | a | 19.35 | 33.18 | a | ||||||
2006 | 25.32 | 19.46 | 24.13 | a | 32.70 | 38.23 | 48.82 | b | 55.13 | 47.23 | a | 37.57 | b | 27.55 | 23.96 | c | 13.24 | f | 34.56 | a | ||||||
2007 | 7.44 | f | 23.14 | 28.23 | a | 33.50 | 41.35 | 47.60 | 57.06 | 51.67 | a | 39.97 | 33.62 | b | 23.21 | a | 17.73 | a | 36.10 | a | ||||||
2008 | 17.61 | 24.21 | j | 25.00 | 27.00 | a | 41.00 | 44.30 | 52.07 | a | 50.77 | 38.13 | 29.00 | 27.21 | b | 16.33 | a | 33.49 | a | |||||||
2009 | 22.67 | a | 22.11 | 26.54 | c | 32.00 | 44.74 | 50.07 | 53.35 | 51.79 | l | 44.07 | c | 30.68 | 22.57 | 12.61 | 32.85 | a | ||||||||
2010 | 29.39 | 27.89 | 29.29 | 31.63 | 38.20 | a | 47.10 | a | 53.21 | b | 47.67 | d | 38.93 | a | 37.19 | 23.80 | 22.87 | 35.60 | ||||||||
2011 | 17.90 | 21.00 | 28.03 | 28.67 | 33.45 | 41.71 | b | 47.86 | c | 47.35 | 38.97 | 31.20 | a | ----- | z | 8.87 | 31.37 | a | ||||||||
2012 | 17.35 | 18.55 | 25.43 | a | 31.17 | a | 34.55 | 42.00 | 51.90 | b | 46.10 | 36.83 | 26.42 | 25.60 | 18.35 | 31.19 | ||||||||||
2013 | 2.55 | 19.93 | 23.74 | 28.34 | a | 35.81 | 44.20 | 52.87 | 47.81 | 44.50 | 24.58 | 21.38 | a | 9.42 | 29.59 | |||||||||||
2014 | 15.03 | 25.43 | 26.41 | b | 29.03 | 37.48 | 44.47 | 52.32 | c | 51.17 | b | 41.23 | 32.65 | 23.27 | 25.00 | a | 33.62 | |||||||||
2015 | 21.29 | 26.68 | 27.84 | 28.12 | d | 38.20 | f | 51.60 | o | 52.41 | i | 46.90 | 39.62 | d | 36.48 | 23.11 | c | 21.35 | 30.15 | c | ||||||
2016 | 17.55 | 22.93 | 27.77 | a | 28.89 | b | 36.07 | a | 45.90 | 46.77 | 44.70 | a | 37.17 | 30.55 | 22.93 | 7.23 | 30.70 | |||||||||
2017 | 7.71 | 20.67 | a | 27.29 | 29.33 | 34.39 | 43.57 | 50.06 | 47.55 | 38.30 | 22.90 | 25.67 | 13.19 | e | 30.05 | |||||||||||
2018 | 22.74 | 18.14 | 24.03 | 28.60 | 36.97 | a | 44.17 | 49.65 | 44.90 | 34.27 | 28.32 | 16.77 | ----- | z | 31.69 | a | ||||||||||
2019 | 18.16 | 18.29 | 22.48 | 31.40 | 34.71 | 39.92 | e | 48.74 | 47.58 | 40.20 | 18.74 | 14.90 | 21.74 | 29.74 | ||||||||||||
2020 | 22.06 | 18.45 | 21.61 | 24.10 | 37.00 | 45.87 | 47.48 | 47.93 | a | 35.87 | 25.90 | 17.67 | ----- | z | 31.27 | a | ||||||||||
2021 | 18.63 | d | 21.64 | c | 19.23 | 23.90 | 35.45 | 46.40 | 51.32 | 46.61 | 34.90 | 32.26 | 24.67 | ----- | z | 32.27 | a | |||||||||
2022 | ----- | z | 13.15 | b | 24.10 | 27.67 | 33.46 | g | 44.20 | 50.33 | p | 51.42 | 38.76 | a | 25.90 | 13.04 | c | 14.33 | a | 28.06 | c | |||||
2023 | 18.39 | 15.54 | 21.97 | 25.27 | 39.77 | 42.67 | c | 50.94 | 46.50 | q | 34.95 | k | 30.00 | e | 18.27 | d | 24.06 | 28.69 | b | |||||||
2024 | 20.07 | c | 22.44 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.26 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.57 | 22.54 | 25.90 | 30.14 | 38.67 | 45.57 | 51.22 | 48.17 | 38.92 | 29.98 | 22.97 | 18.06 | 32.90 | |||||||||||||
S.D. | 5.91 | 4.03 | 3.31 | 2.93 | 2.56 | 2.48 | 2.52 | 2.49 | 2.68 | 3.34 | 4.50 | 5.39 | 1.74 | |||||||||||||
SKEW | -0.57 | -0.01 | 0.13 | -0.04 | 0.17 | 0.19 | 0.27 | 0.06 | 0.41 | -0.55 | -0.65 | -0.46 | -0.17 | |||||||||||||
MAX | 29.39 | 33.40 | 33.07 | 37.35 | 44.87 | 51.79 | 58.00 | 54.14 | 47.00 | 37.19 | 31.18 | 27.57 | 35.95 | |||||||||||||
MIN | 2.55 | 13.15 | 19.23 | 23.90 | 33.45 | 39.92 | 46.39 | 42.68 | 32.50 | 18.74 | 10.69 | 4.34 | 29.59 | |||||||||||||
YRS | 70 | 71 | 65 | 68 | 64 | 64 | 64 | 66 | 63 | 66 | 67 | 62 | 36 |