YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1945 | 4.98 | 5.64 | 7.47 | 23.57 | 39.19 | 53.48 | 58.45 | 52.89 | 43.37 | 24.05 | -1.63 | -1.15 | 25.86 | |||||||||||||
1946 | -2.00 | 0.05 | -0.39 | 24.75 | 44.63 | 58.65 | 61.18 | 52.42 | 42.12 | 29.77 | -2.90 | -16.71 | b | 24.30 | ||||||||||||
1947 | -20.44 | -1.73 | 12.39 | 28.53 | 46.27 | 54.95 | 61.19 | 51.65 | 41.28 | 22.74 | 8.89 | b | 0.90 | 25.55 | ||||||||||||
1948 | -3.90 | -3.28 | 6.55 | 22.38 | 43.53 | 58.22 | 56.40 | 50.15 | 39.72 | 21.74 | -2.78 | -14.68 | a | 22.84 | ||||||||||||
1949 | -7.21 | -5.07 | 16.76 | 20.38 | 40.84 | 49.47 | 58.29 | 53.45 | 47.03 | ----- | z | ----- | z | ----- | z | 30.44 | c | |||||||||
1950 | ----- | z | -12.96 | 17.00 | 27.92 | 44.68 | 56.47 | 61.44 | 57.89 | 45.13 | 25.90 | -0.15 | -5.02 | 28.94 | a | |||||||||||
1951 | -14.94 | -2.16 | 1.37 | 32.10 | 47.82 | 55.30 | 59.61 | 56.02 | 44.90 | 22.60 | 14.57 | -6.97 | 25.85 | |||||||||||||
1952 | -11.56 | -1.98 | 7.85 | 25.42 | 37.63 | 55.42 | 58.44 | 52.65 | 40.33 | 28.55 | 15.22 | -2.98 | 25.41 | |||||||||||||
1953 | -10.64 | b | -0.38 | 8.21 | 34.05 | 47.77 | 59.00 | 61.48 | 54.29 | 44.55 | 23.79 | 1.92 | -3.34 | 26.73 | ||||||||||||
1954 | -9.85 | -13.04 | 13.69 | 27.22 | 49.37 | 57.65 | 56.97 | 55.31 | 42.98 | 30.69 | 14.37 | -17.18 | 25.68 | |||||||||||||
1955 | -3.58 | -9.64 | 11.24 | 19.83 | 43.18 | 53.20 | 60.23 | 52.52 | 43.30 | 22.10 | -7.23 | -6.05 | 23.26 | |||||||||||||
1956 | -14.31 | -7.36 | 7.89 | 28.03 | 45.21 | 55.85 | 60.87 | 55.18 | 42.62 | 16.94 | -7.55 | -21.97 | 21.78 | |||||||||||||
1957 | 4.40 | -1.38 | 15.10 | 31.75 | 47.31 | 64.72 | 59.94 | 59.35 | 44.12 | 29.45 | 14.92 | -12.65 | 29.75 | |||||||||||||
1958 | 0.37 | 7.25 | 18.35 | 32.02 | 46.18 | 59.57 | 59.97 | 55.27 | 42.98 | 17.63 | 3.50 | -3.34 | 28.31 | |||||||||||||
1959 | -8.26 | 9.19 | b | -5.05 | 24.30 | 45.45 | 60.78 | 55.74 | 54.66 | 43.03 | 23.95 | 9.93 | -5.89 | 25.65 | ||||||||||||
1960 | -2.73 | 5.14 | 7.40 | 22.38 | 49.82 | 54.57 | 60.18 | 54.50 | 40.15 | 26.02 | -0.38 | 9.08 | 27.18 | |||||||||||||
1961 | 4.10 | -1.68 | 0.13 | 23.35 | 47.23 | 56.25 | 57.74 | 53.71 | 43.88 | 20.40 | -2.17 | -18.05 | 23.74 | |||||||||||||
1962 | -2.66 | 8.55 | 9.55 | 26.12 | 41.24 | 56.40 | 63.02 | 56.06 | 41.12 | 28.77 | 5.32 | -2.55 | b | 27.58 | ||||||||||||
1963 | 2.24 | 2.86 | 9.71 | b | 24.65 | 45.97 | 50.90 | 58.27 | 53.03 | 45.62 | 24.92 | -4.42 | 5.18 | 26.58 | ||||||||||||
1964 | -14.05 | -0.53 | 1.82 | 23.58 | 35.63 | 56.57 | 59.42 | 54.95 | 44.53 | 28.02 | 6.97 | -21.35 | 22.96 | |||||||||||||
1965 | -6.81 | -9.11 | 25.56 | 29.52 | 40.55 | 54.15 | 57.81 | 52.26 | 47.60 | 12.84 | 8.72 | -10.83 | a | 25.19 | ||||||||||||
1966 | -11.50 | a | -3.48 | 1.45 | 23.95 | ----- | z | 60.23 | 58.52 | 54.37 | 46.73 | 22.39 | 5.10 | -12.32 | 22.31 | a | ||||||||||
1967 | -10.48 | -0.39 | 17.56 | 30.72 | 46.00 | 58.48 | 58.91 | b | ----- | z | 46.75 | 27.36 | c | 9.95 | -1.61 | 25.75 | a | |||||||||
1968 | -3.80 | a | -1.16 | a | 13.97 | 26.65 | 44.45 | 57.92 | 64.05 | 59.23 | ----- | z | 23.73 | 6.22 | -10.77 | 25.50 | a | |||||||||
1969 | -16.55 | -3.64 | 10.26 | b | 31.16 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 5.31 | 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 | -1.32 | h | 8.13 | 20.83 | l | 45.71 | g | 53.78 | c | 61.31 | 54.63 | a | 43.59 | a | 25.40 | g | -4.83 | d | -16.69 | b | 28.56 | e | ||
1976 | -8.38 | a | -12.29 | a | 8.91 | d | 28.58 | 44.17 | d | 55.45 | b | 59.77 | g | 58.02 | f | 45.85 | m | 17.07 | p | 10.36 | s | 0.27 | c | 16.67 | e | |
1977 | 9.79 | 8.66 | 2.90 | f | 23.96 | e | 43.34 | b | 58.03 | 60.80 | d | 60.98 | j | 46.18 | b | 25.39 | -3.00 | a | -8.18 | q | 30.35 | c | ||||
1978 | 4.81 | b | 4.82 | i | 11.38 | c | 30.10 | a | ----- | z | 52.62 | 61.20 | d | 59.25 | i | 45.40 | 23.45 | 14.72 | l | 7.06 | g | 32.71 | e | |||
1979 | -5.25 | g | -10.79 | 5.03 | o | 17.50 | t | 50.67 | j | 55.60 | a | 56.75 | u | 58.05 | i | 45.48 | 36.68 | l | 16.98 | e | -10.27 | a | 19.40 | g | ||
1980 | -23.56 | m | 10.55 | 12.87 | 31.27 | d | 47.71 | c | 54.40 | 61.22 | f | 55.19 | 42.20 | h | 28.85 | r | 4.32 | h | ----- | z | 35.33 | f | ||||
1981 | 13.46 | h | ----- | z | 22.31 | e | 29.20 | 50.12 | g | 54.92 | 55.47 | 52.70 | d | 42.27 | 28.79 | 10.41 | c | ----- | z | 37.01 | d | |||||
1982 | -5.67 | d | 0.04 | a | 12.30 | a | 22.92 | d | 42.24 | b | 57.72 | a | 61.09 | b | 55.16 | 45.67 | d | 16.57 | b | 6.06 | c | 3.17 | a | 26.44 | ||
1983 | -11.11 | c | 1.31 | a | 8.88 | a | 31.25 | 47.13 | a | 58.44 | d | 60.71 | b | 51.77 | a | 38.75 | 22.23 | e | 7.27 | 3.32 | f | 28.79 | a | |||
1984 | -7.55 | c | -12.83 | 17.98 | 25.59 | a | 43.70 | c | 59.35 | 60.15 | 52.79 | 46.05 | a | 24.62 | a | 4.11 | b | -0.67 | b | 26.11 | ||||||
1985 | 9.00 | b | -9.75 | b | 15.95 | a | 16.60 | a | 42.47 | 54.20 | 62.13 | 54.44 | 43.53 | a | 20.67 | a | -2.62 | a | 5.87 | a | 26.04 | |||||
1986 | 2.36 | c | 5.20 | 7.11 | 21.98 | a | 45.48 | c | 58.82 | 60.34 | b | 51.58 | a | 45.43 | a | 24.60 | 0.38 | a | 1.37 | l | 29.39 | a | ||||
1987 | -2.00 | f | 0.48 | b | 10.78 | b | 30.22 | c | 46.16 | b | 59.12 | e | 62.11 | i | ----- | z | ----- | z | ----- | z | 4.29 | i | -7.00 | e | 23.29 | f |
1988 | -2.50 | b | 3.86 | 14.24 | 29.12 | 50.21 | 59.22 | 64.87 | d | 56.32 | c | 44.47 | 18.29 | -1.81 | c | 1.60 | a | 28.16 | ||||||||
1989 | -24.73 | a | 5.41 | 8.06 | 33.21 | a | 44.79 | 57.92 | 62.17 | a | 57.42 | 46.91 | a | 23.71 | b | -5.97 | 0.34 | b | 25.77 | |||||||
1990 | -17.43 | k | ----- | z | 23.42 | m | 34.94 | f | 47.90 | p | 59.50 | q | 66.55 | t | 63.42 | y | 42.67 | j | 24.09 | c | -0.91 | b | -4.68 | c | 6.17 | i |
1991 | -16.71 | q | ----- | z | 13.52 | e | 29.95 | i | 47.88 | o | 63.45 | i | 58.93 | b | 54.36 | q | 48.48 | 25.88 | e | ----- | z | -5.44 | f | 36.70 | h | |
1992 | -2.88 | s | 4.08 | w | 19.77 | i | 29.57 | i | 38.52 | c | 56.77 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.52 | 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 | 3.61 | d | 28.64 | b | 48.35 | a | 55.65 | 63.97 | 52.48 | 45.43 | 32.14 | f | 5.71 | w | -2.34 | 36.98 | d | |||||
2010 | -6.76 | 3.16 | 8.90 | 32.27 | 50.18 | 56.75 | 57.77 | 56.55 | 46.72 | 26.73 | 13.38 | -10.68 | a | 27.91 | ||||||||||||
2011 | -0.70 | a | -1.62 | ----- | z | 25.52 | g | 48.10 | 56.53 | 56.81 | b | 52.24 | h | 46.02 | 28.52 | -4.72 | 5.85 | 26.09 | c | |||||||
2012 | -25.18 | 3.90 | 3.48 | 33.16 | a | 44.34 | 57.85 | 56.85 | a | 53.11 | 42.82 | 23.48 | 2.22 | -7.56 | 24.04 | |||||||||||
2013 | 2.44 | -0.38 | 6.42 | 18.27 | 40.34 | 63.27 | 60.40 | a | ----- | z | ----- | z | 34.11 | 10.68 | -0.35 | 23.52 | b | |||||||||
2014 | 7.85 | -0.05 | 13.53 | 22.38 | m | 48.34 | 53.32 | 57.68 | 55.89 | 44.32 | 24.44 | 11.78 | 7.21 | 29.48 | a | |||||||||||
2015 | -3.69 | b | 5.48 | 13.98 | 33.62 | 52.15 | 58.68 | 59.15 | 53.10 | 41.08 | 30.11 | 12.43 | 0.82 | 29.74 | ||||||||||||
2016 | 8.55 | 10.36 | 16.66 | 35.62 | 49.47 | 57.50 | 59.76 | 58.44 | 44.97 | 26.92 | 5.97 | -0.29 | 31.16 | |||||||||||||
2017 | -8.13 | 1.34 | 1.90 | 31.15 | m | 46.94 | 59.72 | a | 63.82 | 55.37 | 45.05 | 30.16 | 11.38 | 11.87 | 29.04 | a | ||||||||||
2018 | -2.05 | 8.88 | 16.02 | 28.27 | 45.58 | 56.27 | 62.23 | 54.15 | 47.48 | 33.19 | 12.28 | 1.97 | 30.35 | |||||||||||||
2019 | -0.87 | 9.46 | 24.45 | 33.02 | 49.35 | 61.78 | 63.55 | 55.39 | 45.93 | 30.50 | 12.40 | -3.52 | 31.79 | |||||||||||||
2020 | -12.24 | -4.14 | 9.21 | 30.97 | 50.11 | 56.19 | a | 57.52 | a | 56.88 | b | 44.57 | a | 28.90 | 4.92 | 1.55 | 27.04 | |||||||||
2021 | 2.57 | a | -6.16 | 5.97 | b | 25.83 | 47.52 | a | 57.72 | a | 61.23 | 53.16 | 41.95 | 25.79 | 2.33 | 3.66 | 26.80 | |||||||||
2022 | -0.31 | 2.38 | 14.32 | 26.05 | 46.74 | 60.95 | 60.31 | 54.35 | 45.20 | 28.18 | 10.30 | 2.29 | 29.23 | |||||||||||||
2023 | 1.63 | 2.34 | 10.16 | 17.52 | 47.10 | 55.88 | 62.16 | 58.61 | 42.30 | 23.62 | a | 14.23 | -4.42 | 27.59 | ||||||||||||
2024 | -8.26 | 3.14 | 13.11 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.66 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -4.86 | -0.24 | 10.56 | 27.23 | 45.41 | 56.96 | 60.01 | 54.59 | 44.20 | 25.05 | 4.94 | -4.21 | 26.54 | |||||||||||||
S.D. | 8.26 | 6.45 | 6.20 | 4.62 | 3.54 | 2.86 | 2.24 | 2.13 | 2.21 | 4.32 | 6.99 | 8.00 | 2.39 | |||||||||||||
SKEW | -0.38 | -0.33 | 0.01 | -0.36 | -0.66 | 0.07 | 0.06 | 0.41 | -0.42 | -0.42 | -0.09 | -0.40 | 0.23 | |||||||||||||
MAX | 9.79 | 10.55 | 25.56 | 35.62 | 52.15 | 64.72 | 64.87 | 59.35 | 48.48 | 34.11 | 16.98 | 11.87 | 31.79 | |||||||||||||
MIN | -25.18 | -13.04 | -5.05 | 16.60 | 35.63 | 49.47 | 55.47 | 50.15 | 38.75 | 12.84 | -7.55 | -21.97 | 21.78 | |||||||||||||
YRS | 49 | 52 | 54 | 50 | 50 | 54 | 51 | 46 | 50 | 49 | 49 | 48 | 34 |