YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | 34.42 | 40.33 | 53.45 | 62.60 | 66.87 | 63.10 | 53.80 | 43.68 | 27.87 | 22.52 | 46.86 | b | ||||||||||
1941 | 21.58 | 27.96 | 31.67 | a | 36.30 | 49.52 | 55.43 | 62.03 | 60.13 | a | 49.87 | 40.29 | 29.52 | a | 23.45 | 40.65 | ||||||||||
1942 | 18.48 | 16.89 | a | 24.76 | b | 41.50 | b | 45.42 | 57.77 | 66.27 | a | 66.04 | c | 48.97 | a | 44.97 | 29.53 | 25.13 | a | 40.48 | ||||||
1943 | 22.00 | b | 26.04 | b | 31.63 | d | 45.48 | c | 47.70 | a | 56.73 | 65.55 | 61.14 | b | 55.41 | c | 43.73 | a | 29.96 | b | 24.57 | a | 42.50 | |||
1944 | 13.25 | s | 23.52 | 25.52 | 34.70 | 46.81 | 55.23 | 64.19 | 66.29 | 58.40 | 47.00 | 32.30 | 24.37 | a | 43.48 | a | ||||||||||
1945 | 23.61 | 28.89 | 29.29 | 34.03 | 50.03 | 51.63 | 63.52 | 62.16 | 52.83 | 44.45 | 27.93 | 17.00 | 40.45 | |||||||||||||
1946 | 17.10 | a | 22.79 | 33.52 | 44.37 | 46.61 | 60.47 | 64.68 | 60.84 | 54.40 | 37.68 | 26.53 | 23.94 | 41.08 | ||||||||||||
1947 | 14.55 | 25.32 | 30.97 | 35.97 | 49.61 | 56.15 | d | 63.48 | 61.19 | 57.67 | 46.45 | 25.37 | 19.90 | 40.55 | ||||||||||||
1948 | 16.64 | c | 23.36 | a | 24.64 | c | 40.67 | 51.39 | 57.00 | a | 63.73 | a | 61.19 | 56.47 | 41.93 | d | 22.27 | h | 22.27 | a | 41.75 | a | ||||
1949 | 14.00 | 14.62 | b | 31.94 | 41.73 | 48.10 | a | 52.81 | d | 62.89 | c | 62.32 | 54.83 | a | 39.86 | c | 35.69 | d | 21.70 | a | 40.04 | |||||
1950 | 17.61 | 25.70 | a | 28.92 | e | 39.20 | 44.97 | 57.00 | a | 60.84 | 60.03 | b | 53.00 | c | 49.85 | e | 31.80 | 27.55 | b | 41.37 | ||||||
1951 | 18.83 | a | 21.72 | c | 28.45 | b | 38.46 | b | 49.13 | 54.93 | a | 66.16 | 61.45 | 54.46 | b | 45.00 | j | 27.77 | 19.40 | f | 42.14 | b | ||||
1952 | 21.26 | 22.14 | 26.68 | 40.93 | c | 49.80 | a | 59.79 | a | 63.33 | d | 60.79 | c | 54.67 | 40.81 | 25.07 | 19.52 | b | 40.40 | |||||||
1953 | 23.17 | b | 21.04 | 30.00 | c | 35.52 | a | 42.55 | 57.61 | g | 63.29 | 57.00 | 55.92 | e | 41.79 | c | 31.17 | a | 17.81 | 38.11 | a | |||||
1954 | 23.13 | 29.21 | 26.52 | b | 41.13 | 47.42 | 51.43 | 63.89 | c | 57.68 | 50.60 | 39.46 | c | 28.86 | a | 15.00 | a | 39.53 | ||||||||
1955 | 11.84 | 8.50 | 21.48 | 34.87 | 47.26 | 55.47 | 65.87 | 63.11 | c | 57.00 | 44.67 | a | 26.41 | a | 29.10 | b | 38.80 | |||||||||
1956 | 28.77 | 21.15 | b | 30.13 | a | 39.87 | 51.23 | 61.83 | 63.32 | 60.13 | 58.23 | 45.00 | 24.80 | 18.90 | 41.95 | |||||||||||
1957 | 19.71 | 26.50 | 31.00 | 36.53 | 44.26 | 56.69 | d | 60.45 | 58.50 | a | ----- | z | 38.69 | o | 26.41 | c | 21.42 | e | 38.15 | b | ||||||
1958 | 21.54 | e | 29.04 | e | 29.37 | d | 34.67 | i | 46.50 | i | 59.56 | c | 63.69 | e | ----- | z | 53.12 | d | 41.32 | c | 29.03 | a | 25.47 | a | 39.13 | c |
1959 | 17.29 | 21.32 | 29.07 | c | 37.15 | d | 50.25 | c | 60.93 | b | 64.97 | b | 61.13 | 53.10 | 39.00 | 26.57 | 22.84 | 40.30 | ||||||||
1960 | 15.52 | 16.76 | d | 29.16 | 38.07 | 44.94 | 57.93 | ----- | z | 62.00 | a | 54.80 | 41.39 | h | 31.09 | h | 21.35 | 37.84 | c | |||||||
1961 | 19.90 | 24.79 | 30.26 | 36.27 | 46.84 | 61.60 | 63.58 | 62.13 | 46.30 | 41.52 | b | 27.42 | f | 16.25 | c | 40.86 | a | |||||||||
1962 | 16.61 | c | 27.50 | b | 24.54 | c | 41.87 | 47.81 | 57.47 | 61.84 | 61.00 | 54.50 | 46.10 | 35.00 | 23.19 | 41.45 | ||||||||||
1963 | 7.97 | 29.00 | 29.45 | 38.77 | 53.94 | 57.20 | 64.81 | 60.55 | 58.17 | 49.29 | 34.43 | 21.61 | 42.10 | |||||||||||||
1964 | 17.97 | a | 17.55 | 23.87 | 37.00 | 47.32 | 55.00 | 65.00 | 59.68 | 52.24 | a | 45.55 | 27.63 | 19.87 | 39.06 | |||||||||||
1965 | 22.10 | 19.89 | 23.71 | 34.17 | 43.35 | 51.93 | 59.74 | 57.87 | 46.03 | 41.39 | 34.07 | 21.87 | 38.01 | |||||||||||||
1966 | 14.64 | f | 16.74 | a | 28.16 | 35.07 | 48.29 | 56.34 | a | 64.19 | 60.77 | 52.87 | 39.68 | 32.53 | 20.23 | 41.35 | a | |||||||||
1967 | 16.70 | a | 22.86 | 34.26 | 33.97 | 40.90 | 50.86 | b | 60.45 | 57.48 | 50.59 | a | 41.39 | 30.43 | 11.84 | 37.64 | ||||||||||
1968 | 12.45 | 26.24 | 29.03 | 30.10 | 42.43 | a | 53.10 | 60.10 | 53.10 | 47.40 | 40.13 | 29.50 | 17.13 | 36.73 | ||||||||||||
1969 | 23.32 | 23.61 | 27.03 | 40.27 | 52.81 | 52.90 | 64.10 | 63.84 | 51.83 | 34.84 | 29.70 | 25.45 | 40.81 | |||||||||||||
1970 | 21.84 | 30.50 | 28.84 | 31.10 | 48.81 | 58.27 | 64.16 | 65.42 | 51.00 | a | 38.29 | 32.50 | 24.35 | 41.26 | ||||||||||||
1971 | 21.68 | 24.00 | 29.77 | 38.77 | 45.10 | 59.77 | 67.42 | 64.61 | 50.73 | 42.29 | 29.43 | 19.71 | 41.11 | |||||||||||||
1972 | 21.13 | 28.28 | 36.10 | ----- | z | 48.74 | 58.77 | 63.87 | 60.00 | 52.93 | 42.55 | 27.37 | 14.94 | 41.33 | a | |||||||||||
1973 | 8.23 | 21.25 | 29.81 | 33.70 | 46.90 | 54.37 | 61.81 | d | 60.84 | 50.83 | 42.00 | 30.76 | a | 20.03 | 38.38 | |||||||||||
1974 | 11.10 | 14.46 | 35.03 | ----- | z | 52.42 | 61.57 | 65.13 | a | 62.90 | a | 52.90 | 46.00 | 31.53 | 21.03 | 41.28 | a | |||||||||
1975 | 15.93 | b | 23.21 | 28.42 | 36.13 | ----- | z | 53.07 | a | 63.68 | 61.10 | ----- | z | 41.61 | 28.96 | b | 21.81 | 37.39 | b | |||||||
1976 | 15.58 | 29.00 | 25.71 | 36.53 | 47.65 | 54.07 | 64.03 | a | 59.19 | 53.76 | a | 38.65 | 30.00 | a | 20.58 | 39.56 | ||||||||||
1977 | 15.52 | 26.04 | 23.06 | 39.24 | a | 47.39 | 63.30 | 63.74 | 64.19 | 57.00 | 44.26 | 31.29 | b | 26.52 | 41.80 | |||||||||||
1978 | 22.74 | 24.74 | a | 36.26 | 41.40 | 46.74 | 59.77 | 65.74 | 61.87 | 52.87 | 45.61 | 32.53 | 12.97 | 41.94 | ||||||||||||
1979 | 12.13 | 18.43 | 30.06 | 38.57 | 46.97 | 56.53 | 63.65 | 60.74 | 56.83 | 44.81 | 24.13 | 20.87 | 39.48 | |||||||||||||
1980 | 23.03 | 26.86 | 27.00 | 39.69 | a | 43.26 | 59.33 | 63.74 | 58.42 | 53.63 | 41.16 | 31.50 | 31.26 | 41.57 | ||||||||||||
1981 | 27.87 | 26.57 | 30.00 | 42.37 | 45.97 | a | 55.93 | 61.26 | 59.48 | 56.00 | 40.90 | 32.70 | 23.03 | 41.84 | ||||||||||||
1982 | 16.81 | 21.29 | 29.61 | 36.87 | 45.81 | 50.43 | 63.03 | 58.80 | a | 51.41 | a | 34.48 | b | 25.47 | 20.65 | 37.89 | ||||||||||
1983 | 21.90 | ----- | z | 31.13 | 31.41 | a | 41.26 | 52.13 | 61.17 | a | 61.81 | d | 54.76 | a | 42.29 | g | 26.89 | c | 18.44 | d | 40.09 | b | ||||
1984 | 12.93 | b | 20.04 | a | 28.04 | c | 31.79 | b | 49.10 | b | 51.63 | c | 61.50 | c | 57.97 | a | 53.68 | b | 34.33 | d | 28.69 | d | 22.10 | b | 37.65 | |
1985 | 20.03 | 18.46 | 29.33 | a | 39.22 | g | 48.07 | d | 56.64 | e | 60.60 | a | 62.00 | 47.59 | c | 39.67 | a | 28.25 | b | 23.94 | 39.51 | a | ||||
1986 | 25.39 | 28.57 | 36.07 | a | 39.26 | k | 43.92 | e | 56.63 | 56.61 | 58.74 | 47.73 | 36.07 | c | 27.33 | c | 21.62 | b | 39.88 | a | ||||||
1987 | 15.55 | 23.36 | 24.83 | b | 37.03 | a | 44.90 | a | 55.47 | 56.81 | 55.39 | 47.34 | a | 41.90 | 25.57 | 16.30 | d | 37.04 | ||||||||
1988 | 9.63 | a | 18.34 | 23.93 | b | 34.79 | b | 44.42 | 56.72 | a | 61.48 | 57.00 | 48.46 | d | 45.87 | a | 30.50 | b | 21.48 | 37.72 | ||||||
1989 | 13.58 | 19.93 | 35.45 | b | 43.83 | a | 49.72 | b | 55.07 | 64.74 | 58.19 | 52.83 | 40.32 | 29.47 | 19.77 | 40.24 | ||||||||||
1990 | 19.48 | b | 21.81 | a | 32.83 | a | 39.86 | b | 42.28 | b | 58.57 | b | 57.71 | 56.97 | 52.30 | 38.55 | b | 27.40 | 12.40 | a | 38.35 | |||||
1991 | 11.10 | 22.61 | 27.19 | 32.74 | c | 43.10 | 54.54 | b | 58.63 | a | 58.48 | 50.10 | 39.35 | 24.40 | 14.10 | a | 36.36 | |||||||||
1992 | 9.23 | 23.00 | 29.67 | a | 41.08 | d | 44.97 | 51.90 | 55.68 | 54.26 | 48.20 | 39.84 | 17.90 | a | 14.93 | a | 35.89 | |||||||||
1993 | 23.69 | b | 28.18 | 34.52 | 39.53 | 47.27 | a | 55.67 | 62.07 | c | 55.97 | 50.00 | a | 37.16 | 23.80 | 22.81 | d | 40.06 | ||||||||
1994 | 23.39 | 24.04 | 35.74 | 41.07 | 53.41 | d | 63.17 | 65.83 | b | 62.33 | a | 53.41 | c | 38.90 | a | 26.17 | f | 22.07 | d | 43.94 | a | |||||
1995 | 25.42 | g | 33.11 | i | 32.48 | h | 35.56 | n | 41.52 | f | 50.48 | e | 60.74 | d | 64.10 | b | 52.86 | a | 31.07 | b | 29.24 | e | 32.44 | o | 48.08 | f |
1996 | 21.29 | j | 21.75 | i | 27.19 | e | 31.40 | j | 45.95 | k | 59.38 | f | 63.28 | b | 61.68 | c | 45.08 | e | 38.19 | e | 25.14 | i | 15.42 | l | 47.08 | g |
1997 | 16.57 | j | 18.45 | h | 31.16 | l | 30.76 | i | 43.26 | l | 52.42 | f | 55.61 | h | 53.35 | e | 46.85 | d | 32.68 | c | 21.00 | h | 12.62 | b | 36.37 | h |
1998 | 13.00 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.87 | a | 61.74 | 55.47 | 39.14 | b | 28.70 | 17.52 | 44.24 | f | ||||
1999 | 23.17 | a | 25.00 | b | 33.40 | a | 31.61 | b | 41.59 | b | 54.10 | a | 59.70 | d | 56.83 | b | 46.82 | b | 44.50 | a | 37.68 | b | 22.65 | 39.75 | ||
2000 | 23.72 | b | 28.75 | a | 31.21 | b | 41.68 | b | 51.16 | 59.21 | a | 66.45 | 62.13 | 51.67 | 40.42 | 23.07 | b | 24.52 | 42.00 | |||||||
2001 | 23.03 | a | 27.86 | f | 35.70 | a | 42.48 | a | 51.48 | 58.87 | 65.45 | 61.16 | 56.71 | b | 43.27 | a | 34.48 | a | 19.75 | c | 44.76 | a | ||||
2002 | 18.83 | a | 21.69 | b | 28.90 | a | 44.52 | a | 49.83 | a | 63.03 | a | 66.90 | a | 59.55 | b | 50.83 | 38.42 | 27.20 | 22.06 | 40.98 | |||||
2003 | 25.94 | 23.78 | a | 30.10 | 37.53 | 45.55 | 53.83 | 65.35 | 59.87 | 48.47 | 41.30 | a | 25.71 | b | 21.62 | b | 39.92 | |||||||||
2004 | 19.29 | c | 23.26 | b | 39.77 | e | 41.31 | d | 51.21 | c | 59.21 | b | 65.03 | 62.40 | a | 51.86 | a | 43.41 | b | 31.68 | b | 24.37 | d | 42.73 | ||
2005 | 31.03 | b | 30.79 | 33.61 | c | 42.83 | a | 51.97 | 56.27 | 65.19 | 60.43 | a | 54.17 | 44.67 | a | 33.67 | f | 22.96 | c | 44.90 | a | |||||
2006 | 25.59 | d | 26.93 | 34.90 | a | 46.00 | e | 56.32 | f | 63.81 | c | 66.96 | e | 61.89 | c | 50.00 | b | 40.64 | i | 32.19 | i | 22.81 | d | 44.32 | c | |
2007 | 15.06 | 25.44 | a | 34.08 | e | 41.17 | f | 51.30 | h | 60.07 | b | 66.20 | a | 65.11 | c | 56.68 | b | 43.36 | f | 36.05 | h | 20.77 | a | 42.93 | d | |
2008 | 16.90 | a | 23.68 | a | 29.64 | c | 34.80 | e | 44.67 | d | 56.34 | a | 65.63 | a | 63.61 | 53.93 | 42.84 | 35.41 | a | 21.17 | g | 42.50 | a | |||
2009 | 23.07 | a | 30.23 | b | 35.35 | e | 38.30 | c | 53.39 | 55.10 | 66.48 | 62.97 | 56.28 | a | 40.61 | 35.24 | a | 16.14 | b | 42.76 | ||||||
2010 | 20.97 | 23.18 | 32.71 | 41.43 | 46.90 | 62.00 | a | 66.81 | 63.03 | 57.83 | a | 45.19 | 30.87 | 30.25 | c | 43.43 | ||||||||||
2011 | 18.87 | 21.46 | 33.94 | 40.23 | 44.72 | b | 58.73 | 63.35 | 65.10 | 55.97 | a | 42.03 | 30.03 | 22.13 | a | 41.38 | ||||||||||
2012 | 23.94 | 25.83 | 36.35 | 43.34 | a | 53.23 | 64.77 | 66.48 | 64.52 | 56.00 | 42.45 | 35.10 | a | 21.52 | b | 44.46 | ||||||||||
2013 | 13.23 | 23.50 | 34.61 | 37.72 | a | 50.77 | a | 65.17 | a | 67.10 | 63.42 | 56.17 | 39.79 | q | 31.97 | 17.45 | b | 41.92 | a | |||||||
2014 | 22.53 | a | 27.00 | a | 32.93 | b | 37.14 | b | 46.33 | a | 59.59 | a | 67.27 | a | 58.42 | 54.79 | a | 47.10 | 29.50 | 26.76 | f | 43.87 | a | |||
2015 | 24.54 | g | 30.32 | c | 39.37 | a | 37.16 | e | 44.52 | b | 62.46 | d | 61.74 | 62.87 | a | 57.00 | 47.34 | b | 30.03 | 19.90 | a | 44.79 | a | |||
2016 | 19.90 | b | 26.15 | b | 33.94 | 37.86 | a | 46.58 | 64.37 | 65.29 | 60.73 | a | 54.04 | b | 46.04 | c | 37.38 | a | 21.93 | a | 42.85 | |||||
2017 | 21.90 | a | 31.75 | 38.80 | a | 37.90 | a | 46.24 | b | 62.31 | a | 65.10 | b | 61.76 | b | 54.00 | a | 40.13 | 39.66 | a | 25.50 | a | 43.75 | |||
2018 | 24.94 | 25.56 | c | 33.57 | a | 40.50 | 51.93 | a | 61.80 | 67.57 | c | 63.38 | b | 57.33 | 40.16 | 26.97 | a | 22.29 | j | 44.88 | a | |||||
2019 | 19.32 | 19.75 | 31.48 | 40.97 | 41.71 | 56.10 | 65.00 | 64.32 | 57.53 | 34.68 | c | 32.79 | a | 23.89 | c | 40.63 | ||||||||||
2020 | 18.72 | b | 22.15 | b | 36.77 | i | 38.58 | r | 51.19 | d | 57.83 | 62.87 | 64.84 | 51.10 | 41.34 | b | 33.58 | k | ----- | z | 46.26 | d | ||||
2021 | 19.80 | p | 21.52 | c | 28.83 | a | 36.71 | b | 47.06 | 59.83 | 62.53 | a | 56.71 | 50.90 | 35.52 | h | 29.37 | c | 19.17 | g | 43.72 | c | ||||
2022 | 13.80 | k | 15.78 | j | 24.83 | b | 35.27 | d | 39.97 | a | 52.74 | c | 57.94 | 54.83 | a | 49.32 | b | 34.90 | k | 15.09 | h | 11.81 | e | 40.84 | d | |
2023 | 12.77 | e | 10.86 | g | 17.08 | e | 26.31 | d | 42.70 | k | 53.85 | d | 64.60 | a | 65.03 | a | 57.15 | c | 44.89 | d | 33.04 | e | 28.15 | d | 40.29 | b |
2024 | 26.33 | a | 29.96 | e | 33.21 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.15 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.10 | 23.83 | 30.38 | 38.16 | 47.39 | 57.29 | 63.50 | 60.78 | 52.93 | 41.58 | 29.72 | 21.04 | 40.33 | |||||||||||||
S.D. | 5.01 | 4.36 | 4.29 | 3.83 | 3.42 | 3.74 | 2.66 | 2.93 | 3.36 | 3.73 | 3.77 | 4.13 | 1.97 | |||||||||||||
SKEW | -0.22 | -0.66 | -0.23 | -0.42 | -0.00 | 0.15 | -0.85 | -0.49 | -0.38 | -0.35 | 0.02 | -0.22 | -0.30 | |||||||||||||
MAX | 31.03 | 31.75 | 39.77 | 46.00 | 53.94 | 65.17 | 67.57 | 66.29 | 58.40 | 49.85 | 39.66 | 31.26 | 44.46 | |||||||||||||
MIN | 7.97 | 8.50 | 17.08 | 26.31 | 39.97 | 50.43 | 55.68 | 53.10 | 45.08 | 31.07 | 17.90 | 11.81 | 35.89 | |||||||||||||
YRS | 75 | 76 | 80 | 73 | 75 | 80 | 82 | 83 | 82 | 75 | 73 | 76 | 50 |