YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.16 | 42.23 | 34.43 | a | 17.41 | c | 3.16 | 30.28 | g | |||
1944 | 6.93 | a | -7.59 | 4.32 | 22.80 | 43.65 | 51.73 | 53.35 | 55.10 | 47.93 | 35.52 | 27.53 | 2.26 | 28.63 | ||||||||||||
1945 | -2.68 | -1.82 | 19.13 | 26.87 | 35.10 | 47.10 | 55.16 | 55.06 | 44.17 | 32.03 | 17.90 | a | -2.26 | 27.15 | ||||||||||||
1946 | -2.32 | -9.07 | 21.13 | 31.27 | 40.23 | 49.80 | 57.58 | 53.55 | 45.40 | 34.06 | 15.93 | -0.77 | 28.07 | |||||||||||||
1947 | -3.74 | -7.18 | 6.10 | 25.30 | 37.06 | 48.93 | 61.27 | a | 61.58 | 45.63 | 41.77 | 14.80 | -1.03 | 27.54 | ||||||||||||
1948 | -11.16 | -7.76 | 8.55 | 28.27 | 40.77 | 51.43 | 57.39 | 54.90 | 49.33 | 34.55 | 22.79 | a | -0.29 | 27.40 | ||||||||||||
1949 | -5.35 | -13.04 | 4.71 | c | 28.72 | e | 43.03 | 54.70 | 58.94 | 58.71 | 43.67 | 35.13 | a | 23.13 | 0.00 | 27.70 | ||||||||||
1950 | -18.77 | -8.29 | 4.71 | 20.67 | 36.35 | 49.50 | 56.26 | 50.74 | 47.03 | a | 36.53 | a | 13.69 | a | -6.57 | a | 23.49 | |||||||||
1951 | -12.93 | c | -0.16 | c | 4.72 | b | 26.77 | 42.97 | a | 48.71 | b | 54.71 | c | 52.68 | 43.64 | b | 33.68 | 12.77 | -3.19 | 25.36 | ||||||
1952 | -9.20 | a | 7.21 | 8.77 | e | 32.21 | a | 38.86 | b | 54.20 | 56.93 | d | 54.23 | a | 47.30 | 30.13 | 20.79 | a | 11.57 | a | 29.42 | |||||
1953 | -2.68 | -2.68 | 14.87 | 27.83 | 43.00 | 53.23 | 55.97 | 58.58 | 45.73 | 40.29 | 27.20 | 3.23 | a | 30.38 | ||||||||||||
1954 | -15.84 | 12.74 | a | 9.79 | b | 25.80 | 37.87 | 52.63 | 56.87 | a | 53.43 | a | 44.00 | e | 33.83 | a | 23.68 | b | 10.87 | 28.81 | ||||||
1955 | -5.26 | -8.93 | a | -0.40 | a | 35.54 | b | 46.09 | i | 53.96 | c | 62.10 | a | 58.03 | a | 45.48 | a | 36.41 | b | 9.50 | f | -7.96 | c | 26.90 | b | |
1956 | -4.32 | f | -7.05 | i | 8.21 | g | 23.93 | a | 38.42 | e | 57.23 | 54.82 | c | 55.32 | 40.67 | c | 37.72 | b | 20.00 | i | 0.42 | s | 44.02 | e | ||
1957 | -18.82 | n | -7.11 | s | 8.23 | a | 26.32 | b | 40.08 | f | 49.46 | d | 59.46 | e | 54.35 | e | 43.50 | d | 37.03 | 20.81 | i | 2.96 | h | 39.77 | e | |
1958 | 4.81 | d | -5.62 | b | 18.77 | 32.10 | 39.61 | 46.87 | 54.52 | 54.06 | 47.10 | 35.68 | 19.59 | a | -6.13 | a | 28.45 | |||||||||
1959 | -12.68 | c | -9.39 | 11.29 | 27.67 | 42.71 | 54.64 | b | 57.52 | 58.03 | 45.77 | 32.84 | 6.83 | 11.87 | 27.26 | |||||||||||
1960 | -3.65 | -2.93 | 1.32 | 28.83 | a | 39.55 | 50.37 | 57.84 | 57.40 | a | 47.13 | 35.74 | 23.07 | -2.26 | 27.70 | |||||||||||
1961 | -8.33 | a | 6.29 | 19.39 | 24.34 | a | 38.87 | 52.87 | 57.45 | 56.83 | a | 45.50 | 36.23 | 18.57 | 0.35 | 29.03 | ||||||||||
1962 | -10.23 | -6.96 | 13.26 | 24.90 | 42.52 | 53.17 | 53.90 | 53.87 | a | 43.97 | 38.10 | 26.20 | 2.94 | 27.97 | ||||||||||||
1963 | -12.93 | b | -8.25 | 12.00 | 30.90 | 40.00 | 54.50 | h | 58.96 | h | 50.12 | e | 46.73 | h | 41.96 | g | 24.04 | f | -8.03 | b | 14.83 | e | ||||
1964 | -2.00 | g | -5.26 | j | -0.91 | i | 26.17 | g | 41.73 | i | 46.41 | h | 56.14 | i | 48.83 | g | 41.50 | h | 31.67 | g | 21.48 | i | -3.52 | h | ----- | z |
1965 | -13.72 | b | -7.93 | a | -0.33 | a | 30.57 | 41.45 | 50.37 | 55.17 | a | 53.32 | 39.79 | a | 35.35 | 16.27 | 10.87 | 25.93 | ||||||||
1966 | -21.39 | -11.54 | 17.07 | a | 26.38 | a | 36.30 | a | 52.20 | 60.34 | b | 53.52 | b | 45.69 | d | 32.52 | b | 13.30 | c | -1.19 | 25.27 | |||||
1967 | -5.35 | -14.70 | a | 11.26 | 25.15 | c | 35.10 | 49.73 | 54.38 | b | 53.23 | 46.17 | a | 33.42 | 18.07 | 5.52 | 26.00 | |||||||||
1968 | -8.68 | -7.17 | 15.58 | 29.45 | a | 39.97 | a | 52.07 | 54.84 | 54.00 | 46.47 | 35.77 | 21.93 | -0.90 | 27.78 | |||||||||||
1969 | -12.61 | -1.14 | 4.48 | 29.93 | a | 42.40 | a | 45.43 | 56.03 | 58.84 | 47.30 | 32.06 | 20.60 | 7.16 | 27.54 | |||||||||||
1970 | -11.74 | -5.00 | 2.97 | 27.48 | a | 38.65 | 55.43 | 59.67 | a | 53.90 | b | 44.32 | b | 35.10 | 19.50 | -6.48 | 26.15 | |||||||||
1971 | -17.37 | a | -4.46 | 11.35 | 28.23 | 39.26 | 55.03 | 52.40 | a | 54.39 | 46.00 | 38.58 | 21.00 | a | -0.42 | 27.00 | ||||||||||
1972 | -14.71 | -10.66 | 10.58 | 27.33 | 47.45 | 51.00 | a | 54.26 | 56.29 | 42.87 | 31.33 | a | 19.97 | a | -5.10 | a | 25.88 | |||||||||
1973 | -0.40 | a | -1.50 | 24.48 | 28.03 | a | 41.26 | 52.97 | 56.00 | 58.84 | 44.90 | 40.58 | 19.43 | 0.00 | a | 30.38 | ||||||||||
1974 | -10.68 | -5.21 | 7.70 | a | 28.30 | 38.61 | 51.03 | 59.74 | 53.48 | 41.10 | 35.13 | 20.90 | 11.81 | 27.66 | ||||||||||||
1975 | -1.81 | -4.61 | 4.23 | 23.23 | 42.55 | 50.70 | 60.55 | 54.29 | 43.30 | 37.52 | 21.97 | -2.00 | 27.49 | |||||||||||||
1976 | -9.52 | 4.82 | a | 5.90 | a | 32.47 | 40.97 | 55.57 | 56.97 | 54.87 | 45.30 | 26.81 | 12.67 | -11.13 | 26.31 | |||||||||||
1977 | -15.32 | 2.11 | 18.86 | c | 30.87 | 52.03 | a | 54.40 | 58.26 | 48.35 | 46.43 | 33.90 | a | 16.47 | -4.06 | 28.52 | ||||||||||
1978 | -10.58 | -9.25 | 9.32 | 27.57 | 45.48 | 49.73 | 56.87 | 55.97 | 47.90 | ----- | z | 12.00 | -7.45 | 25.23 | a | |||||||||||
1979 | -18.71 | -13.71 | 9.35 | 22.62 | a | 35.52 | 48.40 | 58.67 | a | 52.23 | 44.60 | 29.68 | ----- | z | 6.97 | 25.06 | a | |||||||||
1980 | -8.84 | -4.10 | 2.71 | 31.07 | 45.73 | a | 51.40 | 56.16 | 52.03 | 41.67 | 29.06 | 20.00 | -2.26 | 26.22 | ||||||||||||
1981 | -2.65 | 5.75 | 18.81 | 31.00 | 42.29 | 51.70 | 58.77 | 57.23 | 45.40 | 33.23 | 27.40 | 4.10 | 31.09 | |||||||||||||
1982 | -21.50 | a | -4.04 | 9.47 | a | 24.14 | a | 45.19 | 47.52 | a | 58.76 | b | 54.58 | 45.41 | a | 38.42 | 15.47 | 11.48 | b | 27.08 | ||||||
1983 | 3.94 | 7.82 | 19.77 | 28.17 | 37.80 | a | 52.70 | 61.71 | 60.74 | 44.52 | e | 35.77 | a | 25.03 | -10.43 | a | 30.63 | |||||||||
1984 | -5.68 | 12.62 | 8.17 | a | 30.80 | 38.87 | a | 54.23 | 57.35 | 59.90 | 42.57 | 36.23 | 18.70 | -3.03 | 29.23 | |||||||||||
1985 | -7.97 | -7.68 | 17.00 | 30.33 | 46.57 | a | 47.90 | 56.35 | 51.70 | a | 43.80 | 33.00 | 8.93 | a | -7.55 | 26.03 | ||||||||||
1986 | -0.17 | b | -1.26 | a | 15.45 | 31.55 | a | 44.03 | 51.83 | 59.90 | 53.14 | c | 47.13 | 34.40 | a | 11.80 | 6.83 | b | 29.55 | |||||||
1987 | 2.68 | 15.00 | 20.18 | c | 34.83 | a | 46.26 | 54.53 | 57.35 | 52.50 | a | 48.03 | 31.00 | 24.28 | a | 14.46 | c | 33.43 | ||||||||
1988 | -10.32 | -8.24 | 12.39 | 28.00 | 48.45 | 56.87 | ----- | z | 58.10 | 45.80 | 29.71 | 18.75 | b | 2.13 | 25.60 | a | ||||||||||
1989 | -2.39 | -13.46 | b | 8.39 | 24.31 | a | 42.90 | 50.73 | 61.03 | ----- | z | 42.95 | j | 33.65 | 11.25 | b | -9.83 | a | 20.66 | b | ||||||
1990 | 5.74 | -1.85 | b | 15.50 | a | 24.17 | a | 36.87 | a | 54.30 | 56.67 | a | 58.68 | 48.23 | 28.94 | 18.73 | -2.48 | 28.62 | ||||||||
1991 | -9.52 | 4.63 | a | 14.53 | a | 32.14 | a | 47.55 | b | 55.67 | 56.52 | 56.97 | 42.11 | b | 27.21 | b | 10.30 | -0.14 | b | 28.16 | ||||||
1992 | 2.10 | a | 8.34 | 15.74 | 25.90 | 44.65 | 49.17 | a | 50.58 | 51.29 | 41.43 | b | ----- | z | 19.19 | c | -1.79 | b | 27.87 | a | ||||||
1993 | -7.04 | d | -5.29 | d | 12.21 | c | 26.84 | e | 39.58 | 46.28 | a | 52.43 | a | 54.73 | a | 40.13 | 28.48 | b | 13.32 | b | 3.72 | b | 25.45 | |||
1994 | -17.38 | e | -10.00 | c | 16.64 | f | 27.00 | d | 41.69 | e | 52.39 | b | 55.63 | a | 53.03 | b | 47.07 | c | 40.68 | 22.89 | b | 13.82 | c | 29.71 | a | |
1995 | -3.66 | b | -5.19 | b | 15.07 | c | 24.28 | a | 42.83 | b | 57.93 | 56.27 | a | 56.79 | c | 42.93 | ----- | z | 9.82 | h | -8.23 | r | 31.92 | c | ||
1996 | -13.82 | i | 2.32 | d | 1.68 | c | ----- | z | 47.50 | s | 51.38 | a | 55.65 | 50.10 | 44.07 | 27.93 | c | 6.25 | b | -1.38 | b | 26.44 | c | |||
1997 | -10.20 | k | -0.16 | c | ----- | z | 25.04 | c | 35.07 | b | 56.04 | b | 58.37 | a | 55.48 | b | ----- | z | ----- | z | 13.85 | d | 13.32 | 32.12 | d | |
1998 | 0.66 | b | 19.89 | a | 14.52 | b | 34.59 | a | 45.30 | h | 52.67 | 57.45 | 58.34 | b | 49.57 | g | 37.42 | e | 22.23 | 5.38 | e | 30.32 | b | |||
1999 | -6.54 | c | 8.73 | b | 17.89 | c | 32.40 | 45.67 | a | 53.89 | b | 60.22 | d | 55.97 | b | 45.18 | b | 31.52 | b | 27.96 | b | 9.46 | c | 31.86 | ||
2000 | -2.00 | g | 8.08 | c | 16.79 | b | 22.19 | c | 35.90 | b | 48.22 | c | 48.60 | f | 51.70 | d | 33.56 | c | 34.12 | e | 20.28 | a | -10.58 | e | 26.02 | b |
2001 | 0.10 | b | -14.13 | e | 12.22 | d | 30.00 | f | 43.03 | b | 51.83 | g | 57.43 | c | 57.96 | e | 44.04 | b | 34.68 | c | 29.15 | d | 10.48 | d | 27.50 | b |
2002 | 5.52 | d | 6.36 | c | 5.25 | g | 22.54 | b | 32.59 | b | 52.48 | g | 60.67 | a | 56.39 | c | 47.78 | c | 25.86 | c | 11.25 | j | 8.12 | e | 29.53 | c |
2003 | -7.46 | c | -9.84 | c | 8.60 | f | 23.74 | c | 40.78 | d | 51.90 | 55.11 | c | 58.93 | b | 46.77 | d | 37.57 | h | 13.42 | k | 7.48 | b | 29.71 | c | |
2004 | -14.39 | c | 2.96 | c | 18.83 | g | 26.27 | 37.25 | c | 45.62 | d | 56.53 | a | 49.39 | 53.07 | a | 37.55 | i | 24.78 | c | 3.52 | j | 31.27 | c | ||
2005 | -8.90 | 6.42 | d | 10.39 | c | 30.69 | d | ----- | z | ----- | z | 62.72 | f | 57.90 | a | 50.23 | 37.46 | c | 22.79 | f | 10.81 | d | 24.38 | d | ||
2006 | 15.26 | -4.81 | g | 18.69 | b | 34.90 | 46.35 | 54.92 | d | 61.37 | a | 55.52 | 46.50 | 31.87 | a | 20.46 | d | 12.50 | a | 36.21 | a | |||||
2007 | 2.62 | g | -4.32 | f | 16.03 | a | 26.17 | a | 43.77 | 56.76 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.68 | h | |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | 1.94 | j | 13.59 | n | 31.83 | f | 44.08 | f | 53.96 | f | 59.96 | f | 56.00 | i | 45.71 | f | 40.12 | g | 25.10 | j | 15.60 | k | ----- | z |
2012 | 9.17 | m | 9.29 | l | 25.05 | l | 30.71 | i | 43.79 | g | 53.52 | c | 60.19 | d | 54.88 | g | ----- | z | 33.58 | 19.53 | 5.74 | 34.51 | g | |||
2013 | -2.48 | ----- | z | 5.52 | 21.60 | 39.23 | ----- | z | 59.42 | ----- | z | 49.33 | 35.23 | 17.10 | -10.83 | a | 23.79 | c | ||||||||
2014 | -17.00 | p | -9.46 | 4.16 | 26.87 | 45.42 | 57.27 | 59.06 | 60.06 | 50.03 | 38.06 | 13.30 | 11.39 | 32.38 | a | |||||||||||
2015 | 1.97 | -10.75 | 18.35 | 31.67 | 45.32 | 55.73 | 62.03 | 59.26 | 54.33 | 38.23 | 27.40 | 17.32 | 33.41 | |||||||||||||
2016 | 2.71 | 7.00 | 22.84 | 30.30 | 47.23 | 55.80 | 61.65 | 59.74 | 52.60 | 38.77 | 33.93 | 6.61 | 34.93 | |||||||||||||
2017 | 3.35 | 9.57 | 14.61 | 33.23 | 44.35 | 55.93 | 60.71 | 56.97 | 51.57 | 37.42 | 17.27 | 1.29 | 32.19 | |||||||||||||
2018 | -2.06 | -6.25 | 15.26 | 20.53 | 45.87 | 56.17 | 60.39 | 58.65 | 47.63 | 33.23 | 13.93 | 11.81 | 29.60 | |||||||||||||
2019 | -8.71 | -8.18 | 9.45 | 29.57 | 40.87 | 53.97 | 60.87 | ----- | z | 50.33 | 34.90 | 17.57 | 5.94 | 26.05 | a | |||||||||||
2020 | 0.77 | -1.55 | 16.52 | 26.17 | 43.16 | 56.70 | 61.87 | 59.42 | 45.70 | 30.13 | 22.97 | 11.55 | 31.12 | |||||||||||||
2021 | 8.55 | -6.93 | 21.45 | 30.67 | 45.65 | 58.90 | 62.97 | 60.58 | 51.47 | 43.13 | 24.37 | 7.39 | 34.02 | |||||||||||||
2022 | -10.77 | -12.57 | 12.55 | 24.43 | 45.55 | 54.93 | 60.45 | 58.52 | 50.87 | 37.26 | 22.30 | 2.29 | 28.82 | |||||||||||||
2023 | 5.48 | -0.54 | 6.90 | 26.93 | ----- | z | 59.90 | 58.19 | 59.13 | 54.23 | 40.61 | 23.70 | 23.13 | 32.52 | a | |||||||||||
2024 | 5.55 | 16.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 11.19 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -5.77 | -2.32 | 11.83 | 27.83 | 41.65 | 52.57 | 57.75 | 55.60 | 45.90 | 34.57 | 19.25 | 2.67 | 28.49 | |||||||||||||
S.D. | 7.86 | 8.18 | 6.11 | 3.58 | 3.91 | 3.29 | 2.69 | 3.03 | 3.54 | 3.71 | 5.57 | 7.70 | 2.46 | |||||||||||||
SKEW | 0.16 | 0.70 | -0.10 | 0.08 | 0.01 | -0.17 | -0.19 | -0.16 | -0.10 | -0.18 | -0.06 | 0.14 | 0.71 | |||||||||||||
MAX | 15.26 | 19.89 | 24.48 | 35.54 | 52.03 | 59.90 | 62.97 | 61.58 | 54.33 | 43.13 | 33.93 | 23.13 | 34.93 | |||||||||||||
MIN | -21.50 | -14.70 | -0.40 | 20.53 | 32.59 | 45.43 | 50.58 | 48.35 | 33.56 | 25.86 | 6.25 | -11.13 | 23.49 | |||||||||||||
YRS | 68 | 70 | 68 | 72 | 68 | 70 | 70 | 71 | 70 | 68 | 66 | 71 | 48 |