YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.10 | a | 39.57 | a | 28.03 | a | 21.65 | 36.09 | h | |
1940 | 0.76 | b | 14.96 | b | 18.48 | 33.86 | b | 46.07 | b | 59.13 | 66.27 | a | 61.48 | 55.34 | a | 44.23 | 23.81 | c | 17.66 | b | 36.84 | |||||
1941 | 12.86 | c | 8.00 | b | 21.52 | 43.86 | b | 53.00 | b | 60.07 | a | 64.90 | a | 62.45 | 54.89 | c | 43.77 | a | 30.29 | b | 22.72 | f | 41.42 | a | ||
1942 | 14.48 | d | 14.08 | b | 29.00 | a | 42.33 | 46.77 | a | 58.72 | a | 62.19 | 61.33 | a | 50.55 | a | 39.87 | a | 27.60 | e | 9.24 | j | 40.63 | a | ||
1943 | 1.20 | f | 8.64 | c | 16.34 | b | 34.60 | 46.43 | a | 62.03 | 65.61 | 62.14 | b | 49.47 | 38.87 | a | 24.86 | b | 15.81 | e | 38.62 | a | ||||
1944 | 19.20 | a | 14.79 | a | 20.07 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.02 | i |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.97 | 47.83 | a | 43.03 | b | 29.40 | 13.10 | 39.27 | g | |||
1950 | 2.90 | b | 4.19 | b | 16.03 | 29.73 | 47.74 | 57.17 | 60.13 | 56.81 | 51.93 | 44.67 | a | 21.97 | 2.94 | 33.02 | ||||||||||
1951 | 1.03 | 9.39 | 14.90 | a | 34.33 | ----- | z | 56.17 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.17 | g | ||||
1952 | 6.74 | 18.66 | 20.81 | 37.00 | 48.74 | 59.97 | 63.42 | 60.81 | 53.40 | 34.03 | ----- | z | 20.16 | 38.52 | a | |||||||||||
1953 | 13.35 | 11.93 | a | 24.03 | 33.53 | 48.26 | 61.07 | 62.10 | 62.14 | b | 51.33 | 46.55 | ----- | z | 18.03 | 39.30 | a | |||||||||
1954 | 5.58 | 27.50 | l | 22.03 | 39.03 | 44.29 | 63.10 | 64.16 | 60.77 | a | 53.00 | 41.03 | a | 30.87 | 19.03 | 40.26 | a | |||||||||
1955 | 10.52 | b | 9.88 | c | 17.69 | e | 42.17 | 50.70 | a | 57.33 | 68.10 | 64.74 | 53.60 | 43.13 | 21.60 | 8.35 | 37.32 | |||||||||
1956 | 7.63 | a | 6.24 | 18.00 | 33.20 | 48.94 | 62.10 | 60.53 | a | 61.42 | 49.53 | 47.87 | 28.33 | 17.90 | 36.81 | |||||||||||
1957 | 4.65 | 14.96 | 23.90 | 37.90 | 47.55 | 58.23 | 65.70 | a | 61.65 | 51.30 | 40.29 | 29.33 | 19.23 | 37.89 | ||||||||||||
1958 | 17.03 | a | 8.89 | 25.35 | 38.33 | 49.06 | 53.34 | a | 60.48 | 60.65 | 53.90 | 45.16 | 29.10 | 9.29 | c | 37.55 | ||||||||||
1959 | 2.68 | 6.71 | 24.06 | 37.20 | 52.55 | 60.24 | a | 63.90 | 66.00 | 54.47 | 38.90 | 19.97 | 25.19 | 37.66 | ||||||||||||
1960 | 14.90 | 14.76 | 14.77 | a | 38.20 | 48.58 | 54.87 | 61.10 | 62.58 | 54.20 | 42.00 | 30.50 | 12.42 | 37.41 | ||||||||||||
1961 | 8.65 | 18.57 | 28.06 | 33.07 | 44.87 | 57.67 | 61.55 | 61.13 | 50.43 | 41.84 | 27.37 | c | 11.33 | a | 37.04 | |||||||||||
1962 | 3.13 | 9.04 | 20.58 | 34.63 | 54.26 | 58.40 | 60.45 | 60.19 | 49.90 | 44.32 | 29.90 | 12.77 | 36.46 | |||||||||||||
1963 | -0.71 | 5.50 | 25.55 | 38.37 | 48.13 | 61.80 | 64.29 | 60.35 | 55.37 | 53.06 | 33.60 | 5.77 | 37.59 | |||||||||||||
1964 | 15.26 | 17.21 | 21.74 | 39.03 | 52.77 | 58.20 | 65.71 | 59.87 | 52.87 | 41.06 | 29.83 | a | 10.03 | 38.63 | ||||||||||||
1965 | 3.65 | 4.82 | 16.13 | 35.67 | 52.97 | 58.00 | 61.26 | 59.68 | 49.07 | 43.32 | 28.37 | 24.55 | 36.46 | |||||||||||||
1966 | -4.35 | 9.00 | 29.33 | a | 36.40 | 44.58 | 59.70 | 65.63 | a | 59.45 | 51.73 | 40.71 | 27.63 | 15.03 | 36.24 | |||||||||||
1967 | 9.81 | 2.18 | 24.48 | 38.90 | 43.97 | 59.70 | 61.19 | 58.19 | 51.60 | 41.35 | 27.57 | 17.97 | 36.41 | |||||||||||||
1968 | 10.00 | 8.93 | 29.35 | 40.27 | 46.48 | 58.70 | 62.00 | 62.84 | 53.10 | 45.10 | 31.23 | 13.32 | 38.44 | |||||||||||||
1969 | 3.48 | 13.07 | 17.35 | 41.03 | 50.48 | 52.67 | 62.97 | 62.97 | 53.67 | 40.55 | 27.43 | 16.13 | 36.82 | |||||||||||||
1970 | -0.35 | 9.00 | 20.65 | 37.90 | 49.68 | 59.53 | 62.48 | 61.03 | 52.70 | 42.84 | 27.47 | 11.84 | 36.23 | |||||||||||||
1971 | -0.94 | 9.29 | 19.32 | 35.63 | 43.06 | 62.17 | 58.39 | 58.32 | 53.70 | 46.42 | 28.57 | 15.26 | 35.77 | |||||||||||||
1972 | -0.06 | 3.64 | a | 18.71 | 33.00 | 50.97 | 54.27 | 60.77 | 62.65 | 51.33 | 37.42 | 28.17 | 7.16 | 34.00 | ||||||||||||
1973 | 10.77 | 14.32 | 32.65 | 37.27 | 44.67 | a | 57.90 | 62.26 | 61.90 | 49.07 | 43.68 | 28.43 | 12.58 | 37.96 | ||||||||||||
1974 | 8.58 | 8.64 | 23.00 | 35.97 | 42.77 | 53.90 | 64.68 | 57.13 | 45.33 | 40.55 | 27.97 | 19.52 | 35.67 | |||||||||||||
1975 | 8.29 | 9.04 | 16.42 | 30.83 | 50.35 | 56.87 | 62.90 | 59.19 | 46.97 | 40.65 | 28.47 | 14.19 | 35.35 | |||||||||||||
1976 | 0.39 | 17.66 | 24.97 | 40.83 | 47.10 | 60.57 | 64.42 | 62.52 | 50.60 | 36.35 | 21.40 | 3.74 | 35.88 | |||||||||||||
1977 | -8.13 | 13.79 | 32.45 | 44.97 | 58.26 | 59.73 | 67.55 | 60.39 | 55.33 | 37.90 | 25.57 | 10.13 | 38.16 | |||||||||||||
1978 | -3.13 | -1.82 | 17.71 | 35.07 | 47.47 | a | 55.30 | 59.74 | 59.58 | 53.03 | 37.26 | 20.93 | c | 7.86 | b | 32.42 | ||||||||||
1979 | -6.33 | a | -2.75 | 21.77 | 32.67 | 44.00 | 55.10 | 59.32 | 58.18 | c | 52.30 | 36.77 | 24.50 | 18.84 | 32.86 | |||||||||||
1980 | 7.00 | 6.69 | 17.73 | a | 35.67 | 47.68 | 57.50 | 63.87 | 59.97 | b | 50.00 | 36.84 | 27.90 | 14.13 | 35.41 | |||||||||||
1981 | 9.55 | 15.68 | 25.29 | 40.07 | a | 44.90 | 56.57 | 61.32 | 59.65 | 50.00 | 37.32 | 29.20 | 11.68 | 36.77 | ||||||||||||
1982 | -5.61 | 6.96 | 24.19 | 32.23 | 51.52 | 51.23 | ----- | z | 58.77 | a | 49.73 | 42.58 | 25.34 | a | 19.84 | 32.44 | a | |||||||||
1983 | 14.23 | a | 20.18 | 27.61 | 33.27 | 43.81 | 56.00 | 64.90 | 64.57 | a | 53.27 | 40.67 | a | 27.48 | a | -1.69 | b | 37.02 | ||||||||
1984 | 6.26 | 22.14 | a | 18.26 | 37.28 | a | 45.29 | 58.47 | 59.32 | 62.90 | 47.07 | b | 42.57 | a | 26.18 | b | 12.38 | b | 36.51 | |||||||
1985 | 3.39 | 8.41 | a | 28.39 | 41.63 | 50.90 | 53.31 | a | 61.58 | 57.42 | ----- | z | 41.50 | a | 21.66 | a | -0.23 | a | 33.45 | a | ||||||
1986 | 10.77 | 11.71 | 27.94 | 42.13 | 51.97 | 59.77 | 65.35 | 57.74 | 55.03 | 43.03 | 23.50 | 19.97 | 39.08 | |||||||||||||
1987 | 16.45 | 23.93 | a | 30.90 | 41.90 | 53.97 | 61.17 | 67.39 | 61.68 | 54.97 | 37.65 | 33.07 | 22.10 | 42.10 | ||||||||||||
1988 | 4.90 | 7.97 | 26.06 | 37.50 | 52.71 | 61.33 | 65.45 | 64.94 | 54.03 | 35.84 | 28.67 | 14.45 | 37.82 | |||||||||||||
1989 | 15.97 | 3.00 | 20.58 | 35.77 | 49.06 | 57.03 | 65.45 | 61.90 | 52.27 | 41.16 | 21.97 | 5.13 | 35.77 | |||||||||||||
1990 | 20.19 | 16.14 | 28.23 | a | 38.67 | 46.97 | 59.87 | 63.68 | 63.13 | 56.83 | 40.40 | a | 32.87 | 11.55 | 39.88 | |||||||||||
1991 | 6.10 | 17.00 | 27.10 | 41.53 | 54.42 | 61.58 | r | 63.40 | a | 63.23 | 52.87 | 39.13 | a | 21.00 | 17.35 | 36.65 | a | |||||||||
1992 | 17.81 | 24.10 | 26.19 | 37.20 | 50.87 | 55.77 | 58.13 | a | 58.06 | 52.39 | b | 40.81 | 29.67 | 17.16 | 39.01 | |||||||||||
1993 | 7.77 | 11.86 | 21.93 | a | 35.10 | 50.52 | 56.50 | 64.23 | 63.58 | 49.33 | 40.13 | 27.57 | 18.70 | a | 37.27 | |||||||||||
1994 | -3.13 | 5.37 | a | 27.68 | 38.03 | 49.97 | 61.50 | 61.53 | a | 59.48 | 56.21 | a | 46.71 | 33.20 | 21.03 | 38.13 | ||||||||||
1995 | 13.53 | a | 13.07 | a | 28.10 | a | 34.43 | 48.00 | 62.27 | 64.77 | 67.92 | f | 52.43 | 42.71 | 21.97 | 13.43 | a | 35.88 | a | |||||||
1996 | -0.62 | b | 9.00 | c | 17.87 | a | 33.55 | a | 47.13 | 60.10 | 61.23 | 61.32 | 54.20 | 41.71 | 21.93 | 11.45 | 34.91 | |||||||||
1997 | 5.52 | 15.79 | 24.61 | 35.70 | 44.48 | 59.90 | 62.84 | 60.52 | 55.63 | 43.90 | 25.70 | 23.67 | a | 38.19 | ||||||||||||
1998 | 15.81 | 27.36 | 26.67 | a | 42.17 | 54.10 | 57.70 | 64.19 | 63.37 | a | 57.63 | 45.45 | 33.07 | 21.06 | 42.38 | |||||||||||
1999 | 7.07 | a | 22.19 | b | 26.58 | 39.18 | b | 52.29 | 57.62 | a | 64.93 | a | 59.06 | 52.14 | a | 37.31 | b | 32.10 | 17.94 | 39.03 | ||||||
2000 | 8.48 | 21.17 | 31.58 | 34.60 | 50.48 | 56.53 | 62.32 | 62.23 | 49.40 | 45.97 | 28.87 | 1.87 | 37.79 | |||||||||||||
2001 | 14.84 | 7.61 | 22.03 | 40.53 | 50.83 | a | 58.40 | 63.61 | 64.58 | 52.67 | 41.77 | a | 39.70 | 23.55 | 40.01 | |||||||||||
2002 | 20.10 | 23.46 | 19.87 | 37.10 | 45.26 | 61.57 | 66.52 | 62.39 | 56.43 | 37.97 | 27.00 | a | 20.77 | 39.87 | ||||||||||||
2003 | 9.03 | 8.29 | 23.81 | 37.50 | b | 48.48 | 57.93 | 63.00 | 64.42 | 53.50 | 42.29 | 27.72 | a | 19.57 | a | 37.96 | ||||||||||
2004 | 6.32 | 16.03 | 29.26 | 38.63 | 48.00 | a | 56.47 | 62.32 | 56.90 | 57.76 | a | 42.72 | b | 32.27 | 15.47 | a | 38.51 | |||||||||
2005 | 11.37 | a | 21.00 | 22.77 | a | 41.80 | 46.77 | 63.87 | 66.10 | 61.84 | 57.34 | a | 45.19 | 29.21 | a | 14.68 | 40.16 | |||||||||
2006 | 25.39 | 13.64 | 27.65 | 43.87 | 51.32 | 59.87 | 67.29 | 63.48 | 51.37 | 38.52 | 31.10 | a | 24.13 | a | 41.47 | |||||||||||
2007 | 14.39 | 5.68 | 29.68 | 37.14 | a | 53.97 | 61.97 | 64.23 | 63.61 | 56.20 | 48.70 | a | 29.48 | a | 12.69 | b | 39.81 | |||||||||
2008 | 8.16 | 6.90 | 22.23 | 37.90 | 46.71 | 59.17 | 63.87 | a | 61.71 | 56.23 | 42.10 | 29.57 | 5.97 | 36.71 | ||||||||||||
2009 | -0.06 | 15.21 | 26.26 | 37.63 | 50.16 | 58.40 | 59.16 | 60.77 | 55.60 | 38.37 | a | 35.93 | a | 14.52 | 37.66 | |||||||||||
2010 | 8.13 | 12.43 | 31.45 | 45.53 | 50.19 | 60.77 | 66.77 | 66.87 | 53.13 | 44.07 | a | 30.40 | 10.74 | 40.04 | ||||||||||||
2011 | 6.97 | 11.93 | 23.13 | 38.13 | 50.16 | 60.50 | 69.39 | 63.32 | 53.13 | 45.77 | 32.70 | 22.10 | 39.77 | |||||||||||||
2012 | 13.74 | 18.61 | a | 40.37 | a | 40.07 | 55.43 | a | 61.60 | 69.00 | 61.16 | 50.80 | 40.48 | 30.50 | 19.20 | a | 41.75 | |||||||||
2013 | 11.29 | 14.61 | 20.77 | 34.40 | 48.94 | 59.27 | 64.84 | 62.31 | b | 56.90 | a | 42.19 | 26.87 | 7.65 | 37.50 | |||||||||||
2014 | -0.13 | -1.64 | 19.68 | 35.97 | 50.16 | 62.27 | 62.63 | a | 65.16 | 54.50 | 42.26 | 22.60 | 21.55 | 36.25 | ||||||||||||
2015 | 12.67 | a | 4.46 | 25.39 | 40.10 | 51.48 | 60.53 | 63.97 | 62.10 | a | 61.13 | 44.23 | 36.70 | 29.13 | 40.99 | |||||||||||
2016 | 13.19 | 20.03 | 34.68 | 41.13 | 50.58 | 61.80 | 66.65 | 65.29 | 58.73 | 47.16 | 37.93 | 16.52 | 42.81 | |||||||||||||
2017 | 16.00 | 23.11 | 27.81 | 42.57 | 49.23 | 59.73 | 64.77 | 59.87 | 58.23 | 46.39 | 28.27 | 15.03 | 40.92 | |||||||||||||
2018 | 9.19 | 10.43 | 25.77 | 28.77 | 55.97 | 63.79 | a | 65.26 | 64.74 | 58.03 | 40.17 | b | 24.67 | 22.68 | 39.12 | |||||||||||
2019 | 7.79 | b | 2.22 | a | 17.84 | 36.23 | 45.77 | 57.13 | 65.03 | 60.10 | 56.72 | a | 39.77 | 24.72 | a | 15.77 | 35.76 | |||||||||
2020 | 13.43 | a | 10.10 | 29.00 | 33.90 | 47.97 | 59.90 | a | 65.03 | 62.00 | 51.33 | 36.10 | 31.57 | 18.10 | 38.20 | |||||||||||
2021 | 16.97 | b | 2.41 | a | 29.65 | 37.37 | 48.58 | 62.70 | 62.58 | 62.23 | 53.63 | 47.90 | 29.67 | 18.90 | 39.38 | |||||||||||
2022 | -1.18 | c | 5.26 | a | 24.84 | 33.23 | 50.83 | a | 59.90 | 63.72 | b | 61.48 | 55.30 | 40.52 | 29.47 | 12.84 | 36.35 | |||||||||
2023 | 17.48 | 12.71 | 22.81 | 39.00 | h | 49.29 | 59.66 | a | 61.06 | 62.81 | 58.70 | 45.84 | 29.00 | 28.23 | 40.69 | a | ||||||||||
2024 | 17.74 | 24.14 | 27.58 | 37.12 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.65 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 8.18 | 11.82 | 24.06 | 37.45 | 49.13 | 58.84 | 63.54 | 61.51 | 53.22 | 41.87 | 28.18 | 15.21 | 37.74 | |||||||||||||
S.D. | 7.09 | 6.67 | 5.07 | 3.51 | 3.29 | 2.69 | 2.47 | 2.22 | 3.05 | 3.46 | 4.02 | 6.35 | 2.19 | |||||||||||||
SKEW | -0.14 | 0.17 | 0.31 | 0.04 | 0.23 | -0.52 | -0.00 | -0.07 | -0.04 | 0.32 | 0.17 | -0.41 | 0.07 | |||||||||||||
MAX | 25.39 | 27.36 | 40.37 | 45.53 | 58.26 | 63.87 | 69.39 | 66.87 | 61.13 | 53.06 | 39.70 | 29.13 | 42.81 | |||||||||||||
MIN | -8.13 | -2.75 | 14.77 | 28.77 | 42.77 | 51.23 | 58.13 | 56.81 | 45.33 | 34.03 | 19.97 | -1.69 | 32.42 | |||||||||||||
YRS | 79 | 79 | 80 | 78 | 77 | 77 | 76 | 77 | 78 | 79 | 77 | 77 | 66 |