YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 52.00 | c | 59.23 | a | 59.81 | 51.67 | 41.39 | 24.73 | 5.68 | 42.07 | e | |||||
1959 | 0.23 | 4.04 | 24.88 | e | 33.23 | 49.62 | b | 60.17 | 59.84 | 64.00 | 51.17 | 35.00 | 17.00 | h | 23.79 | g | 38.22 | b | ||||||||
1960 | 8.35 | 10.72 | d | 8.84 | 36.70 | 47.16 | 55.53 | 62.10 | 61.68 | 53.03 | 38.94 | 27.40 | 10.16 | 35.05 | ||||||||||||
1961 | 4.94 | 13.54 | 24.58 | 31.30 | 43.23 | 57.53 | 59.45 | 61.29 | ----- | z | 40.55 | 24.27 | 6.29 | 33.36 | a | |||||||||||
1962 | 2.74 | 9.11 | 17.71 | ----- | z | 52.90 | 56.67 | 60.13 | 59.13 | 47.03 | 42.48 | 30.97 | 13.23 | 35.65 | a | |||||||||||
1963 | -1.61 | 7.07 | ----- | z | 38.00 | 47.55 | 60.50 | 62.48 | 58.90 | 53.43 | 47.26 | 29.50 | 4.19 | 37.03 | a | |||||||||||
1964 | 13.48 | 12.97 | 13.55 | 34.66 | a | 50.19 | 57.70 | 64.19 | ----- | z | 50.10 | 38.97 | 26.47 | 6.81 | 33.55 | a | ||||||||||
1965 | 2.00 | 4.14 | 11.16 | 35.33 | 50.65 | 57.73 | 60.81 | 57.45 | b | 45.37 | 41.48 | 24.20 | 22.03 | a | 34.36 | |||||||||||
1966 | -4.81 | 7.46 | 27.29 | 32.57 | 42.06 | 57.27 | 63.74 | 56.23 | 49.50 | 38.45 | 21.47 | 12.26 | 33.62 | |||||||||||||
1967 | 8.29 | 3.54 | 25.23 | 35.53 | 42.81 | 57.83 | 59.06 | 55.77 | 47.20 | 36.61 | 23.87 | 14.45 | 34.18 | |||||||||||||
1968 | 6.35 | 6.90 | 27.87 | 37.40 | 41.87 | 57.87 | 60.29 | 59.52 | 51.00 | 41.48 | 28.87 | 11.19 | 35.88 | |||||||||||||
1969 | 1.42 | 11.43 | 12.32 | 38.00 | 49.97 | 52.00 | 63.61 | 61.06 | 50.67 | 37.39 | 25.90 | 12.94 | 34.73 | |||||||||||||
1970 | -3.84 | 6.04 | 17.55 | 35.23 | 48.35 | 59.77 | 61.23 | 59.77 | 51.27 | 39.97 | 25.47 | 8.06 | 34.07 | |||||||||||||
1971 | 0.58 | 11.25 | 21.81 | 36.37 | 44.10 | 61.47 | 57.87 | 57.10 | 50.20 | 43.68 | 26.80 | 9.97 | 35.10 | |||||||||||||
1972 | 0.06 | 4.34 | 21.52 | 32.97 | 50.23 | 56.20 | 59.32 | 60.23 | 48.87 | 36.37 | a | 27.33 | 4.77 | 33.52 | ||||||||||||
1973 | 11.68 | 15.32 | 32.52 | 34.80 | 46.55 | 59.03 | 61.61 | 61.52 | 50.67 | 44.90 | 26.97 | 9.39 | 37.91 | |||||||||||||
1974 | 3.45 | 11.14 | 23.87 | 37.23 | 46.23 | 55.13 | 64.32 | 55.93 | a | 45.07 | 39.87 | 26.60 | 15.81 | 35.39 | ||||||||||||
1975 | 6.84 | 5.70 | a | 15.10 | 32.67 | 50.68 | 57.10 | a | 62.39 | 60.45 | 47.37 | 41.00 | 27.43 | 15.39 | 35.18 | |||||||||||
1976 | 5.77 | 21.31 | 25.19 | 39.77 | 46.97 | 58.10 | 62.10 | 58.58 | 48.23 | 32.90 | 18.63 | 3.37 | a | 35.08 | ||||||||||||
1977 | -6.83 | b | 14.71 | 29.10 | 43.07 | 54.67 | a | 57.73 | 62.35 | 55.26 | 51.47 | 36.77 | 22.27 | 8.19 | 35.73 | |||||||||||
1978 | -5.48 | 1.61 | 20.81 | 34.33 | 47.16 | 56.70 | 59.61 | 57.71 | 53.30 | 37.61 | 21.10 | 4.19 | 32.39 | |||||||||||||
1979 | -8.39 | -4.82 | 16.74 | 30.57 | 42.23 | 54.23 | 59.29 | 57.19 | 49.87 | 35.74 | 22.73 | 16.16 | 30.96 | |||||||||||||
1980 | 7.16 | 5.93 | 17.58 | 35.07 | 46.29 | 56.10 | 59.65 | 57.77 | 48.53 | 33.87 | 26.23 | 8.94 | 33.59 | |||||||||||||
1981 | 5.97 | 13.11 | 24.68 | 38.73 | 44.68 | 55.67 | 61.29 | 57.87 | ----- | z | 36.65 | 31.43 | 9.26 | 34.48 | a | |||||||||||
1982 | -5.87 | a | 10.18 | 24.42 | 31.85 | d | 49.71 | 52.83 | 63.84 | 59.19 | 50.47 | 39.48 | 23.67 | 19.06 | 34.90 | |||||||||||
1983 | 12.77 | a | 20.50 | 25.77 | 32.77 | 44.55 | 58.43 | 67.23 | 64.84 | 52.90 | 40.29 | 29.53 | -5.23 | 37.03 | ||||||||||||
1984 | 6.13 | a | 19.14 | 14.97 | 36.60 | 47.35 | 60.60 | 60.00 | i | 61.45 | 45.97 | 42.30 | a | 26.90 | 13.00 | b | 34.04 | a | ||||||||
1985 | 3.83 | a | 8.75 | 28.29 | 40.50 | 51.39 | 54.20 | 58.42 | 52.84 | 47.17 | 35.39 | 15.13 | -1.47 | a | 32.87 | |||||||||||
1986 | 10.34 | b | 9.07 | a | 30.64 | c | 39.23 | 46.87 | 57.17 | 61.20 | a | ----- | z | 49.50 | ----- | z | 15.30 | 14.58 | 33.39 | b | ||||||
1987 | 11.62 | g | 20.32 | 28.53 | a | 36.79 | a | 47.93 | a | 53.87 | 57.39 | ----- | z | 50.00 | f | 33.61 | 29.00 | c | 18.68 | 36.24 | c | |||||
1988 | -2.89 | d | 2.12 | c | 25.74 | 34.72 | a | 52.19 | 61.97 | a | 62.70 | a | 63.39 | 52.60 | 33.06 | 26.37 | 14.26 | 35.52 | ||||||||
1989 | 17.21 | c | 1.00 | a | 17.30 | a | 33.35 | d | 45.64 | c | 55.29 | f | 63.18 | c | 59.47 | a | 47.60 | 34.29 | 19.03 | a | 1.03 | 30.83 | a | |||
1990 | 16.63 | a | 11.61 | 26.47 | a | 32.93 | a | 45.35 | 59.76 | a | 60.29 | 60.74 | 52.07 | 34.27 | a | 24.83 | a | 5.77 | a | 35.89 | ||||||
1991 | 0.60 | a | 16.40 | c | 21.32 | c | 37.50 | 52.13 | 63.57 | 63.13 | a | 61.39 | 50.29 | b | 33.77 | a | 15.96 | c | 14.60 | a | 35.89 | |||||
1992 | 15.33 | a | 21.28 | 25.86 | b | 33.43 | 48.10 | 54.66 | a | 56.07 | b | 55.17 | a | 47.41 | c | 36.55 | 25.48 | a | 10.80 | a | 35.84 | |||||
1993 | 1.59 | b | 6.48 | c | 18.70 | a | 32.59 | a | 47.32 | c | 56.21 | b | 61.76 | b | 59.69 | b | 45.04 | c | 34.85 | e | 21.67 | 14.89 | d | 33.40 | ||
1994 | -5.31 | b | 0.20 | c | 26.74 | d | 33.46 | b | 49.50 | c | 59.24 | a | 58.63 | a | 57.03 | 52.93 | a | 40.94 | 27.90 | 14.13 | a | 34.62 | ||||
1995 | 9.16 | 9.19 | a | 20.97 | a | 29.93 | 40.96 | c | 56.30 | 55.33 | j | 63.07 | b | ----- | z | 35.92 | e | 17.57 | b | 11.43 | a | 29.45 | b | |||
1996 | -0.67 | a | 9.18 | a | 15.14 | c | 29.57 | 44.65 | 58.76 | a | 59.35 | 58.03 | b | 48.48 | a | 36.71 | c | 16.18 | b | 3.97 | 31.61 | |||||
1997 | -1.10 | b | 11.12 | b | 21.86 | c | 29.18 | b | 41.00 | a | 57.77 | d | 62.68 | c | 57.82 | c | 50.57 | b | 37.79 | b | 21.10 | 20.70 | a | 34.21 | ||
1998 | 8.23 | 23.56 | a | 21.23 | a | 37.86 | a | 53.33 | d | 55.71 | b | 62.10 | 60.50 | e | 48.00 | o | 38.89 | m | 28.21 | a | 14.83 | a | 36.56 | b | ||
1999 | 2.53 | a | 19.21 | 24.10 | 37.23 | 49.79 | b | 57.00 | f | 65.17 | a | 58.42 | 47.89 | c | 34.34 | b | 29.15 | d | 13.97 | b | 34.71 | a | ||||
2000 | 3.90 | a | 19.50 | a | 28.81 | 33.29 | b | 50.23 | 55.66 | a | 60.70 | a | 60.06 | 47.22 | c | 39.39 | c | 22.17 | a | -3.74 | 34.77 | |||||
2001 | 9.94 | 0.00 | 16.84 | 35.41 | a | 49.87 | 56.77 | d | 63.04 | f | 58.97 | 48.28 | a | 35.93 | a | 35.04 | d | 18.10 | a | 33.19 | a | |||||
2002 | 12.57 | c | 16.54 | 14.24 | b | 33.70 | 42.07 | c | 58.93 | 63.10 | 56.55 | 51.08 | e | 32.04 | g | 22.17 | a | 15.81 | 35.16 | a | ||||||
2003 | 5.17 | a | 4.82 | 18.32 | 34.30 | 45.32 | 54.90 | a | 60.69 | b | 60.00 | c | 46.90 | 35.39 | c | 22.86 | b | 16.38 | b | 33.75 | ||||||
2004 | 3.83 | a | 9.07 | a | 26.14 | b | 33.03 | 45.52 | 53.07 | a | 58.03 | 51.87 | 52.50 | 38.04 | c | 28.07 | b | 14.03 | a | 34.43 | ||||||
2005 | 5.90 | a | 16.84 | c | 16.87 | 33.00 | d | 43.88 | o | 61.67 | 63.39 | 57.76 | j | 53.19 | c | 36.28 | b | 24.58 | d | 8.69 | b | 32.04 | b | |||
2006 | 19.84 | 8.21 | 21.06 | 40.79 | a | 49.71 | 57.32 | k | 62.73 | e | 58.47 | a | 47.10 | a | 34.13 | 22.73 | 19.58 | 34.94 | a | |||||||
2007 | 9.61 | 3.54 | 26.87 | 33.21 | b | 50.97 | a | 58.53 | 60.97 | a | 59.90 | a | 47.57 | 37.38 | b | 24.93 | a | 6.26 | h | 37.59 | a | |||||
2008 | 1.14 | j | 4.45 | 19.29 | c | 33.10 | 44.16 | 56.87 | 61.61 | 57.71 | 50.03 | a | 37.94 | 24.48 | a | 3.71 | 35.76 | a | ||||||||
2009 | -1.77 | 10.14 | 21.35 | 33.30 | 46.32 | 55.63 | 56.74 | 57.00 | 49.48 | a | 34.55 | 31.10 | 6.20 | a | 33.34 | |||||||||||
2010 | 0.68 | 4.57 | 26.23 | 40.60 | 46.39 | 58.57 | 63.55 | 63.77 | a | 46.37 | ----- | z | 23.60 | 7.26 | 34.69 | a | ||||||||||
2011 | -0.68 | 5.81 | a | 18.90 | 35.33 | 46.84 | 59.70 | 67.03 | 60.52 | 47.70 | 43.43 | a | 27.57 | 17.48 | 35.80 | |||||||||||
2012 | 12.00 | 16.21 | a | 38.03 | 40.14 | a | 55.23 | 61.90 | 68.00 | 59.65 | 47.90 | 36.13 | a | 27.07 | 11.68 | 39.49 | ||||||||||
2013 | 5.93 | a | 9.32 | 16.40 | a | 30.83 | 47.26 | 60.72 | a | 62.68 | 60.10 | a | 54.25 | b | 38.81 | 21.10 | a | 2.39 | 34.15 | |||||||
2014 | -1.71 | -1.43 | 15.74 | 33.20 | 46.19 | 59.17 | 59.26 | 60.68 | 51.17 | 37.16 | 15.03 | 17.32 | 32.65 | |||||||||||||
2015 | 10.06 | 1.39 | 23.26 | 35.37 | 47.19 | 58.30 | 60.29 | 57.84 | 55.13 | 39.39 | 30.77 | 21.26 | 36.69 | |||||||||||||
2016 | 7.42 | 16.86 | 29.00 | 37.37 | 48.19 | 62.20 | 65.65 | 63.23 | 55.43 | 40.23 | 33.50 | 10.29 | 39.11 | |||||||||||||
2017 | 13.45 | 22.14 | 22.06 | 38.17 | 46.55 | 58.40 | 61.42 | 56.42 | 52.67 | 39.32 | 21.83 | 11.23 | 36.97 | |||||||||||||
2018 | 4.19 | 1.29 | 21.23 | 23.47 | 53.81 | 62.70 | 62.90 | 61.19 | 54.17 | 34.45 | 18.27 | 16.19 | 34.49 | |||||||||||||
2019 | 4.23 | -1.96 | 17.32 | 35.47 | 44.45 | 58.80 | 63.84 | 58.71 | 55.90 | 37.13 | 22.97 | 14.32 | 34.26 | |||||||||||||
2020 | 10.29 | 8.00 | 27.71 | 32.00 | 47.74 | 61.67 | 63.90 | 61.10 | 50.73 | 33.42 | 28.60 | 15.68 | 36.74 | |||||||||||||
2021 | 13.65 | 2.61 | 29.74 | 35.60 | 48.26 | 61.33 | 63.35 | 60.58 | 53.00 | 45.58 | 28.43 | 15.65 | 38.15 | |||||||||||||
2022 | -4.26 | 2.11 | 24.39 | 32.70 | 52.32 | 63.27 | 64.84 | 59.87 | 49.80 | 36.48 | 24.20 | 8.00 | 34.48 | |||||||||||||
2023 | 9.68 | 5.75 | 13.94 | 33.13 | 49.32 | 60.03 | 59.03 | 60.42 | 53.47 | 40.77 | 24.97 | 23.84 | 36.20 | |||||||||||||
2024 | 11.55 | 21.69 | 21.97 | 36.73 | 41.33 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.98 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 4.88 | 9.44 | 22.06 | 34.87 | 47.62 | 57.93 | 61.63 | 59.22 | 50.11 | 37.97 | 24.76 | 11.30 | 34.98 | |||||||||||||
S.D. | 6.51 | 6.87 | 5.67 | 3.28 | 3.38 | 2.76 | 2.51 | 2.52 | 2.73 | 3.29 | 4.44 | 6.19 | 1.77 | |||||||||||||
SKEW | 0.04 | 0.28 | 0.04 | -0.24 | 0.08 | -0.06 | 0.19 | -0.34 | 0.10 | 0.63 | -0.33 | -0.45 | 0.37 | |||||||||||||
MAX | 19.84 | 23.56 | 38.03 | 43.07 | 55.23 | 63.57 | 68.00 | 64.84 | 55.90 | 47.26 | 35.04 | 23.84 | 39.49 | |||||||||||||
MIN | -8.39 | -4.82 | 8.84 | 23.47 | 40.96 | 52.00 | 56.07 | 51.87 | 45.04 | 32.90 | 15.03 | -5.23 | 30.96 | |||||||||||||
YRS | 64 | 66 | 65 | 65 | 64 | 63 | 63 | 62 | 61 | 62 | 65 | 64 | 45 |