YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1945 | 12.19 | 13.82 | 17.19 | 33.27 | 50.26 | 64.03 | 67.55 | 59.29 | 50.43 | 30.65 | 5.03 | 4.29 | 34.00 | |||||||||||||
1946 | 4.61 | 6.43 | 12.23 | 36.90 | 54.13 | 69.20 | 71.19 | 60.19 | 48.53 | 35.94 | 4.70 | -8.83 | a | 32.93 | ||||||||||||
1947 | -12.58 | 6.71 | 20.55 | 37.37 | 56.81 | 65.23 | 71.74 | 61.48 | 49.37 | 29.16 | 16.00 | a | 8.74 | 34.22 | ||||||||||||
1948 | 3.65 | 6.90 | 18.77 | 32.57 | 54.13 | 68.07 | 65.77 | 59.16 | 47.53 | 27.39 | 3.47 | -7.73 | a | 31.64 | ||||||||||||
1949 | 0.74 | 2.96 | 26.97 | 31.60 | 51.13 | 57.37 | 67.26 | 61.29 | 54.43 | ----- | z | ----- | z | ----- | z | 39.31 | c | |||||||||
1950 | ----- | z | -4.57 | 27.94 | 38.93 | 55.03 | 67.20 | 71.52 | 67.55 | 52.00 | 31.58 | 7.43 | 1.87 | 37.86 | a | |||||||||||
1951 | -9.03 | 6.75 | 10.65 | 41.37 | 60.03 | 66.83 | 69.29 | 64.58 | 53.40 | 30.94 | 19.70 | 1.16 | 34.64 | |||||||||||||
1952 | -4.19 | 6.03 | 18.55 | 36.77 | 47.13 | 67.20 | 68.61 | 62.19 | 46.70 | 34.16 | 22.30 | 3.32 | 34.06 | |||||||||||||
1953 | -2.60 | a | 8.93 | 21.06 | 46.23 | 58.06 | 69.37 | 71.87 | 61.81 | 52.43 | 30.84 | 9.03 | 1.48 | 35.71 | ||||||||||||
1954 | -2.26 | -1.93 | 25.71 | 37.77 | 61.55 | 67.17 | 65.13 | 63.23 | 50.27 | 36.19 | 19.33 | -10.29 | 34.32 | |||||||||||||
1955 | 4.32 | -1.18 | 22.68 | 30.07 | 52.61 | 61.47 | 69.84 | 59.61 | 49.80 | 27.26 | -0.50 | 1.77 | 31.48 | |||||||||||||
1956 | -7.26 | 0.31 | 18.87 | 37.93 | 53.68 | 64.83 | 70.16 | 62.29 | 49.47 | 22.77 | 0.23 | -15.61 | 29.81 | |||||||||||||
1957 | 12.61 | 7.14 | 24.74 | 42.07 | 55.81 | 75.23 | 69.00 | 67.45 | 51.63 | 35.10 | 19.30 | -6.39 | 37.81 | |||||||||||||
1958 | 6.00 | 12.96 | 27.16 | 41.77 | 55.39 | 67.97 | 67.84 | 61.90 | 48.90 | 24.87 | 9.47 | 2.94 | 35.60 | |||||||||||||
1959 | -1.42 | 17.44 | a | 7.16 | 33.60 | 54.32 | 70.50 | 63.29 | 63.23 | 49.83 | 30.48 | 15.03 | -1.29 | 33.52 | ||||||||||||
1960 | 3.74 | 13.24 | 16.42 | 31.50 | 59.06 | 63.20 | 67.94 | 61.45 | 45.63 | 30.19 | 5.17 | 15.26 | 34.40 | |||||||||||||
1961 | 9.87 | 4.29 | 10.45 | 31.07 | 57.26 | 64.37 | 66.23 | 61.26 | 49.83 | 24.74 | 4.87 | -12.00 | 31.02 | |||||||||||||
1962 | 4.71 | 14.68 | 18.68 | 34.10 | 50.03 | 65.50 | 71.97 | 63.61 | 47.93 | 33.65 | 10.70 | 3.77 | a | 34.94 | ||||||||||||
1963 | 7.61 | 9.39 | 19.53 | a | 32.23 | 55.23 | 59.00 | 65.94 | 59.74 | 53.03 | 29.16 | 1.17 | 12.06 | 33.68 | ||||||||||||
1964 | -7.52 | 6.69 | 11.10 | 30.93 | 43.68 | 65.77 | 67.32 | 62.19 | 51.90 | 32.00 | 13.07 | -14.03 | 30.26 | |||||||||||||
1965 | -0.26 | -1.89 | 32.10 | 37.13 | 48.81 | 61.83 | 65.16 | 59.13 | 54.23 | 20.13 | 15.23 | -2.20 | a | 32.45 | ||||||||||||
1966 | -2.32 | 5.07 | 10.61 | 33.97 | ----- | z | 70.27 | 68.00 | 63.52 | 55.30 | 28.13 | 11.63 | -3.65 | 30.96 | a | |||||||||||
1967 | -1.23 | 8.04 | 27.32 | 38.57 | 56.26 | 68.00 | 66.73 | a | ----- | z | 55.63 | 33.39 | c | 16.97 | 5.58 | 34.11 | a | |||||||||
1968 | 3.67 | a | 6.43 | a | 26.84 | 36.67 | 54.55 | 67.73 | 74.65 | 69.87 | ----- | z | 28.74 | 11.83 | -3.32 | 34.33 | a | |||||||||
1969 | -8.84 | 5.89 | 22.59 | b | 42.75 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.60 | h | ||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | 9.70 | h | 23.16 | 33.00 | i | 58.08 | e | 65.38 | a | 72.23 | 65.03 | 51.79 | a | 33.00 | d | 3.21 | a | -7.76 | b | 40.46 | c | |||
1976 | -1.45 | -0.89 | a | 20.69 | b | 41.93 | 54.89 | c | 66.77 | 70.58 | g | 70.08 | f | 57.67 | l | 26.82 | n | 19.64 | p | 8.54 | c | 27.21 | e | |||
1977 | 17.48 | 16.89 | 18.48 | 35.92 | e | 55.24 | b | 70.23 | 75.41 | d | 74.19 | 52.67 | 32.52 | 5.33 | -0.21 | q | 41.31 | a | ||||||||
1978 | 13.27 | a | 16.61 | e | 25.10 | b | 43.72 | a | ----- | z | 61.93 | 71.96 | d | 71.41 | i | 54.20 | 30.32 | 22.33 | l | 15.17 | g | 39.64 | d | |||
1979 | 3.21 | g | 0.93 | 13.50 | o | 31.60 | t | 63.38 | j | 65.60 | 65.20 | u | 69.23 | i | 55.30 | 45.53 | l | 25.32 | e | -3.13 | 28.80 | g | ||||
1980 | -14.06 | m | 20.90 | 27.39 | 43.93 | b | 60.26 | 64.43 | 70.96 | f | 64.77 | 50.36 | h | 35.77 | r | 12.68 | h | ----- | z | 46.95 | f | |||||
1981 | 21.04 | h | ----- | z | 35.50 | e | 41.10 | 63.48 | f | 67.23 | 64.23 | 62.83 | b | 49.60 | 32.77 | 17.96 | b | ----- | z | 46.40 | d | |||||
1982 | 0.48 | d | 8.33 | a | 22.53 | a | 34.92 | d | 53.07 | b | 68.59 | a | 71.14 | b | 64.10 | 54.19 | d | 23.14 | b | 13.07 | a | 9.77 | 35.28 | |||
1983 | -3.36 | c | 11.00 | 21.77 | 42.73 | 59.50 | a | 70.89 | c | 71.86 | b | 60.50 | a | 47.63 | 27.77 | e | 16.60 | 13.45 | b | 36.70 | ||||||
1984 | 4.30 | a | -4.62 | 30.42 | 40.62 | a | 57.57 | c | 73.43 | 71.84 | 62.87 | 58.45 | a | 33.50 | a | 13.38 | a | 9.32 | 37.59 | |||||||
1985 | 18.47 | a | 1.73 | b | 29.50 | a | 32.53 | 55.77 | 65.50 | 75.19 | 63.65 | 51.10 | a | 28.47 | a | 6.72 | a | 16.63 | a | 37.11 | ||||||
1986 | 12.71 | 16.57 | 22.97 | 34.93 | a | 58.11 | c | 72.23 | 71.86 | b | 60.84 | 54.73 | 30.55 | 8.67 | 8.92 | e | 37.76 | |||||||||
1987 | 4.15 | e | 12.37 | a | 25.72 | b | 43.22 | c | 59.17 | b | 72.48 | e | 73.68 | i | ----- | z | ----- | z | ----- | z | 10.38 | f | 0.36 | c | 31.07 | e |
1988 | 5.29 | 11.76 | 24.42 | 39.47 | 61.10 | 70.33 | 76.85 | d | 66.07 | b | 54.60 | 24.94 | 5.33 | 9.74 | 37.49 | |||||||||||
1989 | -17.03 | a | 16.04 | 20.61 | 43.69 | a | 54.97 | 68.97 | 71.93 | a | 65.77 | 55.59 | a | 30.57 | a | 0.73 | 9.23 | 35.09 | ||||||||
1990 | -8.75 | k | ----- | z | 36.28 | m | 45.88 | f | 59.13 | p | 71.44 | n | 78.42 | s | 76.62 | w | 50.60 | j | 29.62 | b | 6.64 | b | 4.32 | c | 13.53 | i |
1991 | -8.00 | q | ----- | z | 24.12 | e | 43.95 | h | 60.12 | n | 75.55 | h | 68.13 | a | 64.00 | p | 58.63 | 33.08 | e | ----- | z | 0.92 | e | 36.98 | g | |
1992 | 5.00 | s | 10.86 | v | 32.18 | i | 39.41 | h | 48.89 | c | 66.17 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.89 | k |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | 13.15 | d | 39.36 | b | 60.37 | a | 65.13 | 75.00 | 60.65 | 53.53 | 36.92 | f | 11.00 | w | 4.77 | 46.49 | d | |||||
2010 | -1.19 | 10.82 | 18.52 | 42.87 | 61.58 | 66.40 | 65.48 | 64.68 | 56.37 | 32.10 | 19.13 | -4.93 | a | 35.98 | ||||||||||||
2011 | 5.10 | a | 8.21 | ----- | z | 36.43 | g | 59.29 | 65.73 | 65.66 | b | 59.04 | g | 53.80 | 34.45 | 3.07 | 12.58 | 34.21 | c | |||||||
2012 | -17.87 | 11.55 | 12.29 | 43.45 | a | 54.94 | 67.30 | 65.81 | 61.55 | 49.87 | 29.13 | 7.80 | -0.52 | 32.11 | ||||||||||||
2013 | 8.65 | 5.75 | 17.52 | 29.00 | 50.87 | 73.90 | 69.27 | a | ----- | z | ----- | z | 38.52 | 17.10 | 5.26 | 31.58 | b | |||||||||
2014 | 14.03 | 6.75 | 23.55 | 33.18 | m | 58.65 | 62.90 | 66.35 | 64.48 | 53.20 | 29.39 | 17.03 | 11.84 | 37.11 | a | |||||||||||
2015 | 2.21 | b | 12.82 | 25.39 | 43.07 | 63.29 | 69.93 | 68.03 | 60.81 | 47.03 | 34.74 | 18.40 | 6.71 | 37.70 | ||||||||||||
2016 | 15.19 | 17.76 | 24.94 | 44.93 | 58.97 | 66.67 | 66.94 | 66.13 | 52.67 | 33.68 | 12.37 | 4.94 | 38.76 | |||||||||||||
2017 | -0.84 | 9.39 | 12.42 | 39.35 | m | 58.03 | 69.76 | a | 73.16 | 63.71 | 52.10 | 35.16 | 17.73 | 17.77 | 37.13 | a | ||||||||||
2018 | 4.29 | 15.64 | 24.71 | 36.87 | 54.97 | 66.23 | 72.61 | 60.45 | 54.73 | 39.39 | 17.10 | 7.58 | 37.88 | |||||||||||||
2019 | 5.74 | 16.75 | 32.29 | 41.60 | 59.90 | 71.57 | 72.35 | 62.90 | 53.57 | 35.32 | 17.57 | 3.61 | 39.43 | |||||||||||||
2020 | -5.97 | 4.14 | 18.03 | 38.93 | 60.23 | 65.28 | a | 65.07 | a | 64.97 | b | 51.72 | a | 34.74 | 11.47 | 7.23 | 34.65 | |||||||||
2021 | 8.63 | a | 0.75 | 15.52 | b | 35.80 | 57.03 | a | 66.72 | a | 70.03 | 59.71 | 49.60 | 30.26 | 7.50 | 11.39 | 34.41 | |||||||||
2022 | 4.58 | 7.93 | 21.84 | 35.97 | 56.94 | 71.47 | 70.10 | 62.29 | 51.60 | 33.06 | 15.03 | 8.29 | 36.59 | |||||||||||||
2023 | 7.39 | 8.96 | 19.94 | 27.03 | 57.42 | 64.93 | 70.81 | 66.68 | 48.47 | 29.57 | a | 19.83 | 2.32 | 35.28 | ||||||||||||
2024 | -1.26 | 10.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.61 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 2.34 | 8.22 | 21.27 | 37.69 | 55.96 | 67.13 | 69.48 | 63.10 | 51.90 | 30.94 | 11.54 | 3.06 | 34.90 | |||||||||||||
S.D. | 8.13 | 6.16 | 6.22 | 4.75 | 4.02 | 3.57 | 3.26 | 2.96 | 3.00 | 3.95 | 6.56 | 7.90 | 2.42 | |||||||||||||
SKEW | -0.31 | -0.15 | -0.17 | -0.22 | -0.78 | -0.17 | 0.19 | 1.32 | 0.05 | -0.45 | -0.07 | -0.43 | -0.22 | |||||||||||||
MAX | 18.47 | 20.90 | 35.50 | 46.23 | 63.29 | 75.23 | 76.85 | 74.19 | 58.63 | 39.39 | 25.32 | 17.77 | 39.43 | |||||||||||||
MIN | -17.87 | -4.62 | 7.16 | 27.03 | 43.68 | 57.37 | 63.29 | 59.13 | 45.63 | 20.13 | -0.50 | -15.61 | 29.81 | |||||||||||||
YRS | 50 | 53 | 54 | 50 | 51 | 54 | 51 | 47 | 50 | 50 | 49 | 51 | 36 |