YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | 24.08 | p | 26.94 | 33.70 | 40.42 | 49.07 | 56.94 | 53.39 | 50.80 | 34.68 | 26.83 | 12.58 | 38.53 | b | ||||||||||
1950 | 16.87 | 25.26 | a | 26.35 | 33.97 | 37.71 | 45.97 | 56.42 | 50.68 | 43.97 | 39.39 | 23.20 | 17.71 | 34.79 | ||||||||||||
1951 | 13.19 | 20.07 | 22.77 | 31.53 | 39.55 | 42.07 | 56.06 | 54.03 | 44.80 | 34.81 | 23.07 | 15.16 | 33.09 | |||||||||||||
1952 | 21.77 | 18.62 | 21.16 | 33.90 | 40.68 | 47.87 | 53.32 | 53.77 | 45.30 | 33.16 | 17.57 | 14.19 | 33.44 | |||||||||||||
1953 | 19.42 | 16.29 | 23.16 | 29.70 | 33.26 | 46.60 | 55.68 | 51.13 | 43.83 | 35.06 | 24.13 | 8.26 | 32.21 | |||||||||||||
1954 | 18.90 | 22.21 | 24.26 | 35.47 | 41.13 | 45.30 | 55.39 | 51.65 | 47.40 | 37.03 | 23.53 | 14.19 | 34.71 | |||||||||||||
1955 | 10.32 | 10.07 | 23.87 | 28.87 | 39.19 | 45.23 | 51.58 | 56.16 | 46.40 | 36.71 | 24.27 | 22.61 | 32.94 | |||||||||||||
1956 | 24.00 | 11.14 | 24.68 | 29.43 | 38.23 | 49.70 | 50.48 | 51.29 | 46.07 | 35.90 | 16.13 | 12.13 | 32.43 | |||||||||||||
1957 | 25.13 | 29.96 | 27.55 | 30.33 | 39.03 | 47.63 | 54.23 | 54.10 | 43.97 | 37.45 | 22.67 | 21.39 | 36.12 | |||||||||||||
1958 | 19.03 | 25.82 | 26.32 | 30.87 | 41.45 | 50.23 | 52.84 | 56.13 | 48.97 | 37.35 | 22.73 | 17.48 | 35.77 | |||||||||||||
1959 | 15.16 | 19.68 | 20.68 | 33.33 | 36.94 | 50.53 | 54.45 | 53.68 | 43.60 | 34.32 | 22.97 | 19.84 | 33.76 | |||||||||||||
1960 | 8.39 | 16.48 | 27.74 | 31.43 | 38.84 | 51.53 | 57.13 | 55.71 | 49.20 | 35.74 | 26.37 | 18.26 | 34.74 | |||||||||||||
1961 | 16.58 | 23.43 | 27.32 | 31.47 | 39.03 | 51.03 | 56.35 | 56.48 | 45.93 | 34.94 | 26.47 | 14.35 | 35.28 | |||||||||||||
1962 | 12.42 | 23.93 | 23.06 | 35.17 | 37.39 | 47.30 | 57.03 | 54.52 | 50.47 | 38.10 | 30.30 | 19.87 | 35.80 | |||||||||||||
1963 | 10.35 | 21.89 | 26.16 | 31.73 | 41.74 | 46.50 | 58.19 | 55.97 | 52.20 | 41.45 | 29.90 | 15.94 | 36.00 | |||||||||||||
1964 | 10.61 | 9.93 | 21.58 | 30.00 | 40.90 | 47.43 | 58.65 | 55.61 | 49.37 | 36.81 | 24.80 | 19.16 | 33.74 | |||||||||||||
1965 | 21.84 | 17.25 | 24.74 | 32.23 | 38.35 | 45.17 | 56.97 | 53.19 | 45.13 | 34.71 | 30.20 | 22.55 | 35.19 | |||||||||||||
1966 | 14.87 | 14.54 | 26.74 | 34.17 | 43.65 | 49.70 | 57.61 | 55.90 | 49.30 | 36.29 | 28.83 | 17.48 | 35.76 | |||||||||||||
1967 | 10.06 | 21.36 | 27.77 | 31.10 | 38.48 | 48.70 | 58.48 | 55.23 | 49.90 | 35.39 | 28.10 | 12.94 | 34.79 | |||||||||||||
1968 | 12.13 | 27.45 | 28.35 | 32.43 | 39.35 | 47.93 | 55.16 | 51.29 | 44.70 | 35.58 | 25.90 | 10.74 | 34.25 | |||||||||||||
1969 | 23.35 | 23.79 | 21.13 | 32.43 | 41.16 | 47.30 | 58.13 | 58.35 | 49.50 | 35.23 | 26.43 | 23.03 | 36.65 | |||||||||||||
1970 | 16.61 | 24.82 | 25.10 | 26.90 | 39.32 | 48.37 | 57.65 | 55.77 | 45.83 | 32.00 | 24.33 | 15.06 | 34.31 | |||||||||||||
1971 | 12.42 | 18.25 | 23.10 | 29.17 | 36.42 | 47.17 | 55.81 | 53.87 | 44.57 | 34.13 | 24.90 | 18.65 | 33.20 | |||||||||||||
1972 | 16.81 | 19.07 | 27.16 | 28.80 | 36.94 | 47.97 | 55.90 | 54.32 | 46.63 | 41.29 | 24.70 | 14.87 | 34.54 | |||||||||||||
1973 | 10.71 | x | ----- | z | 34.61 | h | ----- | z | ----- | z | ----- | z | 51.30 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.30 | k |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.69 | o | ----- | z |
1975 | 15.50 | a | 17.04 | d | 25.36 | q | 26.83 | f | 32.33 | g | 41.69 | q | ----- | z | 49.71 | j | 46.04 | c | 35.58 | g | ----- | z | ----- | z | 26.19 | i |
1976 | ----- | z | ----- | z | ----- | z | 33.08 | f | 39.07 | d | 44.00 | d | 53.44 | d | 51.60 | f | 46.93 | c | ----- | z | 23.25 | j | ----- | z | 45.86 | h |
1977 | 12.87 | 20.71 | 23.20 | a | 31.79 | b | 36.64 | c | 50.83 | a | 55.00 | b | 55.13 | 48.80 | 38.74 | 25.20 | 20.47 | a | 34.95 | |||||||
1978 | ----- | z | 23.08 | c | 29.61 | 30.22 | c | 35.90 | 49.41 | c | 55.70 | d | 50.43 | a | 43.73 | d | 35.48 | 30.33 | c | 18.64 | c | 36.60 | a | |||
1979 | 19.23 | a | 17.37 | a | 26.10 | 32.48 | e | 43.88 | f | 47.54 | b | 52.26 | 49.71 | 48.14 | i | 35.97 | b | 22.04 | f | 17.67 | g | 35.08 | d | |||
1980 | 26.00 | b | 26.36 | a | 26.29 | 31.40 | 35.30 | d | 45.60 | 51.52 | 51.00 | 46.00 | 32.13 | 22.54 | b | 28.00 | c | 35.18 | ||||||||
1981 | ----- | z | ----- | z | 25.76 | f | 36.67 | i | 38.68 | 49.21 | b | 53.39 | 52.50 | a | 46.59 | c | 34.48 | b | 22.34 | a | 16.26 | 39.18 | d | |||
1982 | 12.33 | a | 20.61 | 25.97 | 28.93 | 35.16 | 41.77 | 50.42 | 53.93 | b | 46.56 | c | 28.96 | c | 26.11 | b | 16.90 | a | 32.30 | |||||||
1983 | 15.37 | a | 21.48 | a | 26.52 | b | 25.57 | 34.32 | 40.52 | a | 52.13 | 52.87 | 46.95 | h | 36.55 | 21.73 | 21.61 | 31.70 | a | |||||||
1984 | 14.66 | b | 12.48 | 20.38 | b | 28.07 | c | 38.52 | 45.69 | d | 55.00 | a | 53.14 | c | 46.67 | c | 32.00 | d | 24.52 | e | 22.26 | d | 32.78 | |||
1985 | 18.52 | 18.41 | a | 26.03 | a | 31.18 | b | 39.50 | e | 45.03 | a | 53.19 | 51.23 | a | 41.73 | 35.45 | 24.12 | e | 17.04 | e | 33.45 | |||||
1986 | 18.03 | a | 22.11 | a | 25.43 | a | 30.93 | c | 35.24 | b | 47.87 | 54.00 | 54.03 | b | 42.21 | b | 33.28 | b | 25.87 | 20.10 | b | 34.09 | ||||
1987 | 14.23 | a | 21.57 | 21.48 | 29.24 | a | 36.48 | b | 43.66 | a | 47.32 | 50.35 | 39.85 | c | 34.87 | a | 23.80 | e | 14.15 | d | 31.42 | |||||
1988 | 13.90 | a | 19.54 | a | 16.46 | c | 27.33 | 36.18 | c | 44.40 | e | 53.00 | b | 53.59 | b | 39.69 | a | 33.26 | d | 18.32 | e | 13.89 | c | 30.80 | ||
1989 | 11.45 | b | 18.79 | 21.86 | b | 31.97 | a | 36.87 | 42.13 | 53.29 | 49.97 | 45.10 | a | 31.61 | 21.67 | r | 13.21 | b | 32.39 | a | ||||||
1990 | 12.32 | 17.43 | 27.38 | b | 33.15 | c | 37.45 | b | 46.38 | a | 52.48 | d | 49.52 | b | 49.63 | c | 32.03 | b | 24.54 | b | 9.36 | c | 32.64 | |||
1991 | 16.07 | c | 22.25 | 23.61 | 24.66 | a | 31.55 | b | 42.79 | b | 53.07 | a | 54.97 | b | 45.21 | b | 33.53 | a | 23.93 | b | 21.24 | b | 32.74 | |||
1992 | 12.70 | a | 24.82 | a | 28.24 | b | 31.62 | a | 42.55 | 42.73 | d | 50.59 | d | 51.15 | d | 43.31 | d | 35.07 | b | 19.33 | c | 15.68 | 33.15 | |||
1993 | 24.72 | b | 23.19 | b | 24.80 | a | 27.31 | a | 38.17 | b | 41.96 | b | 48.24 | b | 53.59 | b | 42.71 | b | 33.00 | b | 21.23 | d | 17.45 | b | 33.03 | |
1994 | 13.13 | 19.12 | d | 26.48 | 31.10 | a | 38.21 | b | 46.75 | b | 54.13 | h | 61.60 | f | 45.71 | b | 33.77 | a | 22.82 | b | 21.62 | b | 29.87 | b | ||
1995 | 22.10 | b | 25.76 | c | 26.93 | b | 27.63 | 34.97 | 41.52 | a | 50.97 | 57.46 | c | 46.00 | b | 30.81 | 27.42 | f | 19.75 | c | 34.90 | a | ||||
1996 | 17.03 | a | 25.52 | 22.77 | 29.27 | 37.03 | 47.68 | b | 55.68 | 54.00 | 44.75 | b | 35.45 | 25.57 | b | 17.74 | 34.37 | |||||||||
1997 | 19.03 | b | 20.37 | a | 23.76 | b | 30.13 | 39.23 | a | 45.33 | 51.90 | 55.10 | b | 52.07 | b | 33.61 | 23.87 | 16.80 | a | 34.27 | ||||||
1998 | 21.32 | 21.36 | 24.39 | 27.77 | 34.87 | 40.10 | 56.74 | 55.42 | 49.17 | 35.26 | 26.20 | 17.77 | 34.20 | |||||||||||||
1999 | 15.16 | 17.32 | 24.35 | 28.00 | 37.31 | b | 44.37 | 56.29 | 54.23 | 46.60 | 31.19 | 24.10 | 9.32 | 32.35 | ||||||||||||
2000 | 18.13 | 21.48 | 25.42 | 30.97 | 38.87 | a | 49.17 | 55.87 | a | 54.00 | a | 47.97 | 37.97 | 21.17 | 16.81 | 34.82 | ||||||||||
2001 | 15.65 | 18.54 | 24.87 | 31.50 | 38.35 | 45.20 | 55.94 | 54.26 | 46.87 | 35.55 | 27.72 | a | 14.90 | a | 34.11 | |||||||||||
2002 | 15.77 | a | 15.21 | 19.94 | 32.23 | 34.81 | 46.17 | a | 57.16 | 50.93 | b | 44.93 | a | 34.73 | a | 24.73 | 18.52 | 32.93 | ||||||||
2003 | 22.77 | 23.54 | 24.55 | 26.86 | a | 38.87 | 45.13 | 54.19 | 53.97 | 44.30 | 35.74 | 21.80 | 14.39 | 33.84 | ||||||||||||
2004 | 17.19 | 18.41 | 30.42 | 32.20 | 35.45 | 45.20 | 50.29 | 51.97 | 42.32 | b | 33.23 | 25.97 | a | 12.68 | 32.94 | |||||||||||
2005 | 24.58 | 26.64 | 24.29 | 27.56 | c | 37.61 | 41.13 | 50.52 | 49.90 | b | 44.67 | 33.39 | 18.40 | 10.65 | 32.44 | |||||||||||
2006 | 11.29 | c | 11.46 | 18.55 | b | 27.33 | 34.97 | 44.57 | 52.16 | 50.58 | 36.87 | 28.94 | 16.93 | 9.87 | a | 28.63 | ||||||||||
2007 | 9.32 | 12.70 | a | 17.23 | 23.67 | 34.55 | b | 38.17 | 49.55 | 48.84 | 39.77 | 27.18 | c | 19.93 | a | 18.20 | a | 28.26 | ||||||||
2008 | 14.03 | a | 19.79 | a | 20.48 | 23.10 | 31.90 | 41.57 | 49.84 | 47.35 | 37.73 | 24.68 | 24.03 | 19.34 | b | 29.49 | ||||||||||
2009 | 16.84 | 16.86 | 20.52 | d | 20.93 | a | 37.63 | a | 40.20 | 50.71 | 45.17 | a | 39.39 | b | 22.00 | 15.43 | 4.81 | 27.54 | ||||||||
2010 | 7.57 | c | 13.39 | 13.90 | b | 21.90 | 27.00 | a | 36.43 | 47.87 | 44.83 | a | 37.44 | c | 26.81 | 9.36 | b | 10.73 | a | 24.77 | ||||||
2011 | 0.89 | c | 4.77 | b | 12.41 | b | 22.44 | c | 24.42 | 31.60 | 39.68 | 40.79 | b | 30.57 | 16.96 | d | 5.18 | b | -1.74 | 19.00 | ||||||
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.63 | c | 31.45 | b | ----- | z | ----- | z | 39.04 | j |
2013 | 9.53 | a | ----- | z | ----- | z | 28.22 | c | 37.61 | 45.97 | 57.10 | 54.03 | 47.62 | a | 28.84 | 25.03 | a | 15.68 | 34.96 | b | ||||||
2014 | ----- | z | 19.57 | 23.79 | c | 26.37 | 34.29 | 43.55 | a | 57.03 | a | 50.63 | a | 49.32 | b | 35.65 | 20.45 | a | 21.33 | a | 34.73 | a | ||||
2015 | 23.33 | g | 21.96 | 27.29 | 29.83 | a | 36.82 | c | 48.63 | 53.73 | a | 52.80 | a | 46.33 | 37.90 | a | 22.07 | 15.45 | b | 35.71 | a | |||||
2016 | 15.79 | c | 17.34 | 20.14 | c | 27.62 | a | 34.73 | a | 48.79 | a | 52.33 | d | 52.37 | a | 46.65 | d | 36.00 | 27.59 | c | 19.90 | a | 33.27 | |||
2017 | 20.28 | b | 25.65 | b | 26.71 | 27.23 | d | 34.17 | a | 47.13 | 55.97 | b | 51.00 | a | 45.76 | a | 32.77 | 25.43 | 13.29 | 33.78 | ||||||
2018 | 17.19 | 19.85 | a | 23.37 | a | 31.77 | d | 35.48 | 45.73 | 56.16 | 50.52 | f | 46.13 | 36.26 | d | 17.07 | b | 15.68 | c | 31.34 | a | |||||
2019 | 17.17 | a | 18.52 | a | 26.79 | b | 29.63 | 34.47 | a | 44.03 | a | 53.89 | c | 51.63 | a | 45.68 | b | 27.10 | a | ----- | z | ----- | z | 34.89 | b | |
2020 | 17.23 | a | 20.10 | 26.93 | b | 28.43 | 37.41 | b | 46.78 | c | 53.35 | 53.53 | a | 41.93 | b | 31.84 | 26.71 | b | 12.46 | c | 33.06 | |||||
2021 | 14.90 | a | 16.32 | 21.71 | 29.28 | a | 35.52 | b | 50.07 | 57.03 | 53.87 | a | 47.57 | 33.23 | a | 24.15 | d | 22.86 | b | 33.88 | ||||||
2022 | 17.27 | a | 14.36 | 21.35 | 27.70 | 35.67 | a | 49.23 | 56.26 | 55.23 | a | 48.93 | b | 34.83 | a | 18.68 | b | 19.50 | a | 33.25 | ||||||
2023 | 17.53 | a | 19.00 | b | 24.19 | 25.50 | 36.58 | 40.53 | 54.55 | 55.55 | 44.43 | b | 33.63 | a | 25.07 | b | 20.13 | a | 33.06 | |||||||
2024 | 18.96 | d | 22.61 | a | 24.07 | a | 24.67 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.88 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.06 | 19.65 | 24.04 | 29.57 | 37.08 | 45.61 | 53.92 | 52.78 | 45.39 | 33.81 | 23.30 | 16.37 | 33.06 | |||||||||||||
S.D. | 4.72 | 4.67 | 3.42 | 3.12 | 3.12 | 3.65 | 3.23 | 3.00 | 3.73 | 3.99 | 4.44 | 4.75 | 2.88 | |||||||||||||
SKEW | -0.18 | -0.55 | -1.05 | -0.63 | -1.24 | -1.07 | -1.37 | -1.34 | -1.15 | -1.56 | -1.53 | -0.84 | -2.68 | |||||||||||||
MAX | 26.00 | 29.96 | 30.42 | 35.47 | 43.65 | 51.53 | 58.65 | 58.35 | 52.20 | 41.45 | 30.33 | 28.00 | 36.65 | |||||||||||||
MIN | 0.89 | 4.77 | 12.41 | 20.93 | 24.42 | 31.60 | 39.68 | 40.79 | 30.57 | 16.96 | 5.18 | -1.74 | 19.00 | |||||||||||||
YRS | 67 | 69 | 69 | 69 | 70 | 71 | 71 | 68 | 71 | 71 | 66 | 68 | 57 |