YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 49.38 | e | 42.38 | f | 32.53 | a | 12.95 | h | 4.59 | d | 28.84 | i |
1952 | -1.46 | c | 8.25 | a | 11.87 | 29.97 | 38.58 | 48.83 | 53.52 | 51.29 | 44.50 | 26.39 | 22.40 | 14.81 | 29.08 | |||||||||||
1953 | 4.67 | a | 2.52 | a | 17.47 | a | ----- | z | 38.77 | 51.50 | 52.50 | a | 52.90 | a | 43.37 | 38.23 | 24.00 | 8.71 | 30.42 | a | ||||||
1954 | -1.68 | 16.29 | 11.26 | 29.87 | 36.39 | 51.97 | 54.26 | 50.90 | 44.39 | b | 33.67 | a | 24.57 | 12.94 | 30.40 | |||||||||||
1955 | -1.32 | -0.48 | a | 8.90 | a | 36.62 | d | 43.90 | a | 50.28 | a | ----- | z | ----- | z | 42.00 | i | 33.97 | b | 14.17 | -4.10 | 20.21 | c | |||
1956 | -3.27 | a | -6.62 | 10.37 | a | 26.53 | 38.00 | 50.37 | 48.84 | 47.97 | 36.33 | 33.81 | 18.53 | 6.35 | 25.60 | |||||||||||
1957 | -10.68 | -0.39 | 7.97 | 27.67 | 37.13 | 47.53 | 56.35 | 50.60 | a | 40.17 | 30.77 | 22.30 | 7.29 | 26.39 | ||||||||||||
1958 | 7.61 | -2.89 | 15.66 | b | 27.14 | a | 35.10 | 41.83 | a | 49.19 | 48.10 | a | 44.14 | a | 34.42 | 21.17 | -1.81 | 26.64 | ||||||||
1959 | -8.87 | -4.07 | a | 15.35 | 29.14 | a | 43.77 | a | 50.93 | 50.42 | 57.45 | 45.45 | a | 33.65 | 11.00 | a | 16.35 | 28.38 | ||||||||
1960 | 3.39 | 2.86 | 1.68 | 30.63 | 40.57 | a | 43.28 | a | 48.65 | 54.03 | 46.37 | 32.75 | c | 23.73 | 4.67 | a | 27.72 | |||||||||
1961 | -2.10 | 9.89 | 20.26 | 25.30 | 34.48 | 45.57 | 50.47 | a | 50.79 | c | 43.70 | c | 33.81 | d | 18.47 | 2.77 | e | 27.78 | ||||||||
1962 | -8.40 | f | 1.50 | h | 17.56 | d | 27.29 | f | 41.55 | 44.96 | g | 47.36 | c | 47.09 | i | 41.16 | e | 34.41 | i | ----- | z | 6.18 | c | 30.76 | g | |
1963 | -9.16 | 0.89 | j | 13.28 | b | 30.07 | 36.86 | i | 44.43 | g | 50.48 | 47.46 | c | 42.72 | a | 36.70 | a | ----- | z | 1.43 | c | 26.62 | d | |||
1964 | 6.07 | d | 4.59 | 8.63 | a | 29.21 | f | 40.46 | e | 43.92 | e | ----- | z | 46.23 | ----- | z | 31.14 | j | 23.83 | a | -3.37 | d | 21.29 | d | ||
1965 | -12.04 | c | -9.68 | c | 0.52 | d | 27.40 | e | 43.34 | b | ----- | z | ----- | z | ----- | z | 40.21 | a | ----- | z | ----- | z | ----- | z | 14.96 | f |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | 33.50 | c | 46.13 | 53.84 | 49.76 | b | 40.47 | 31.23 | 19.97 | a | 4.16 | 34.88 | d | |||||
1967 | 1.23 | -9.00 | 10.63 | d | 29.03 | 31.87 | 48.81 | i | ----- | z | 51.65 | 46.03 | 34.53 | a | 19.14 | a | 9.68 | 22.48 | b | |||||||
1968 | 1.50 | a | ----- | z | 22.84 | ----- | z | 39.97 | ----- | z | ----- | z | ----- | z | 48.07 | ----- | z | 23.11 | b | 5.61 | 23.52 | f | ||||
1969 | -3.23 | -3.12 | b | 8.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.55 | i | ||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.15 | d | 14.15 | k |
1971 | ----- | z | ----- | z | 16.00 | 31.27 | 40.00 | 55.97 | 53.32 | 52.42 | 48.77 | 43.19 | 25.77 | 10.93 | c | 37.76 | b | |||||||||
1972 | -6.48 | 0.03 | 13.58 | 29.50 | 46.65 | 50.20 | 55.87 | 55.03 | a | 45.43 | 33.03 | 25.27 | 4.65 | 29.40 | ||||||||||||
1973 | 8.48 | 15.14 | f | 29.81 | 32.33 | 41.48 | 53.57 | 56.84 | 57.48 | 47.03 | 42.10 | 25.00 | 9.23 | 36.67 | a | |||||||||||
1974 | 1.10 | a | ----- | z | 18.23 | 33.13 | 41.47 | a | 49.53 | 59.48 | 52.65 | 41.34 | a | 37.00 | a | 26.83 | ----- | z | 36.08 | b | ||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.26 | h | 49.87 | 39.03 | 33.59 | b | 21.69 | a | 4.07 | b | 29.65 | g | ||
1976 | -8.16 | 11.54 | e | 12.00 | f | 32.47 | 32.88 | e | 49.79 | b | 55.00 | a | 48.29 | 35.15 | d | 22.56 | m | 10.65 | d | ----- | z | 29.74 | c | |||
1977 | -20.07 | b | ----- | z | 24.36 | i | 35.61 | b | 51.03 | 51.54 | d | ----- | z | 47.18 | c | 44.56 | c | 30.68 | 23.95 | i | 5.41 | b | 30.74 | d | ||
1978 | -10.37 | a | ----- | z | 21.68 | l | 28.12 | d | 45.63 | d | 52.29 | f | 55.45 | ----- | z | ----- | z | ----- | z | 15.23 | d | -5.23 | 21.47 | f | ||
1979 | -19.33 | a | -14.07 | 13.08 | e | 26.38 | a | ----- | z | ----- | z | 54.22 | h | 57.30 | k | 43.29 | i | 30.17 | h | 21.50 | 14.90 | k | 5.51 | g | ||
1980 | -0.50 | k | -9.34 | 10.55 | i | 28.79 | f | 40.88 | e | 46.21 | k | 59.28 | f | 54.62 | j | 43.60 | j | 27.62 | b | 22.86 | h | 3.70 | h | 19.72 | i | |
1981 | 3.39 | h | 15.11 | i | 19.09 | h | 30.24 | i | 36.24 | j | 50.23 | h | 60.77 | 59.04 | h | 42.16 | e | 29.85 | e | 23.03 | a | 1.77 | a | 31.52 | g | |
1982 | -22.31 | b | -0.78 | a | 13.61 | 25.33 | 48.31 | b | 37.20 | 64.52 | 51.90 | a | 43.62 | a | 39.77 | a | 17.41 | c | 13.81 | d | 27.70 | |||||
1983 | 0.61 | 17.46 | b | 23.06 | 23.76 | a | 30.23 | 51.46 | b | 69.19 | 66.39 | 45.57 | 33.57 | a | 21.89 | c | -9.17 | a | 31.17 | |||||||
1984 | -6.74 | d | 11.26 | b | 1.66 | b | 31.27 | 34.90 | b | 49.80 | 53.52 | 58.77 | 37.90 | 31.90 | 18.30 | 11.35 | e | 27.82 | ||||||||
1985 | -3.40 | a | -2.83 | d | 23.13 | a | 34.50 | 40.58 | 37.83 | 55.84 | 54.73 | a | 41.80 | 31.58 | 10.52 | a | -4.17 | a | 26.68 | |||||||
1986 | 9.25 | c | -0.96 | d | 21.32 | c | 36.14 | a | 39.63 | a | 51.03 | 65.42 | 54.03 | a | 45.43 | 36.87 | a | 16.50 | 16.53 | a | 32.60 | |||||
1987 | 10.53 | a | 17.61 | 25.50 | a | 31.45 | a | 45.32 | 54.67 | 63.45 | 53.81 | 44.93 | 29.03 | a | 26.58 | d | 17.07 | b | 35.00 | |||||||
1988 | 1.04 | c | -12.37 | b | 17.87 | a | 28.60 | 42.97 | 61.38 | a | 64.77 | 60.77 | 41.50 | 30.06 | 29.26 | c | 4.93 | a | 30.90 | |||||||
1989 | 7.97 | -9.50 | j | 11.75 | c | 30.17 | a | 45.33 | a | 46.83 | 60.68 | 57.52 | 44.90 | 30.06 | 16.39 | b | -12.77 | 30.80 | a | |||||||
1990 | 20.67 | a | 10.36 | 24.52 | 32.37 | 35.32 | 56.93 | a | 54.03 | 55.87 | 51.23 | 30.97 | 26.90 | 9.00 | a | 34.01 | ||||||||||
1991 | -8.67 | a | 9.93 | a | 23.37 | a | 32.53 | 46.19 | 61.83 | 61.00 | 55.57 | a | 43.13 | 32.34 | b | 15.31 | a | 10.48 | 31.92 | |||||||
1992 | 10.70 | a | 11.93 | 20.55 | 31.43 | 37.48 | 49.53 | 44.32 | 46.61 | 40.47 | 30.70 | a | 22.33 | 10.60 | a | 29.72 | ||||||||||
1993 | 4.71 | 0.93 | 14.90 | a | 27.23 | 37.71 | 44.90 | 56.58 | 57.55 | 37.50 | 29.10 | a | 22.28 | a | 13.35 | 28.90 | ||||||||||
1994 | -24.82 | c | -5.11 | 26.60 | a | 32.67 | 38.26 | 54.97 | 57.48 | 55.03 | a | 50.27 | 37.48 | 22.63 | 16.81 | 30.19 | ||||||||||
1995 | 5.68 | c | 4.79 | d | 25.54 | c | 24.80 | 35.68 | 57.46 | b | 60.52 | 61.48 | 46.10 | 38.06 | 17.80 | 7.71 | c | 32.14 | ||||||||
1996 | -14.61 | c | -4.19 | c | 6.60 | a | 21.46 | b | 36.35 | 49.59 | a | 55.77 | 57.13 | 48.43 | 36.20 | a | 13.93 | a | 3.71 | 25.87 | ||||||
1997 | -9.33 | a | 1.26 | a | 14.15 | d | 23.86 | b | 28.87 | 47.10 | 54.06 | 44.13 | a | 44.17 | 30.24 | b | 17.17 | 14.19 | 25.82 | |||||||
1998 | 10.82 | c | 20.11 | a | 18.79 | b | 30.38 | a | 41.77 | a | 48.93 | 52.29 | 50.31 | b | 43.07 | 35.16 | 26.24 | a | 9.23 | a | 32.26 | |||||
1999 | -0.43 | a | 12.14 | 15.35 | 30.87 | 41.90 | a | 50.50 | 58.13 | a | 53.68 | 44.97 | 33.58 | 27.43 | 9.80 | a | 31.49 | |||||||||
2000 | -0.84 | 8.66 | 23.77 | 27.21 | a | 41.57 | a | 45.87 | 54.55 | 54.77 | 42.48 | a | 37.61 | 23.60 | -5.47 | a | 29.48 | |||||||||
2001 | 5.00 | -2.43 | 12.71 | 33.27 | 44.83 | a | 51.70 | 50.94 | 53.55 | 39.83 | 33.87 | a | 27.62 | a | 12.80 | a | 30.31 | |||||||||
2002 | ----- | z | 9.96 | a | 5.90 | 29.00 | 34.48 | 52.80 | 59.10 | 53.58 | 47.47 | 27.26 | 16.14 | a | 13.26 | 31.72 | a | |||||||||
2003 | -1.71 | -1.86 | 13.87 | 27.33 | 33.42 | 47.57 | 52.23 | 53.77 | 43.83 | 27.81 | 18.00 | 10.53 | a | 27.07 | ||||||||||||
2004 | -4.87 | 7.72 | 20.52 | 28.83 | 38.97 | 45.69 | a | 52.23 | 45.19 | 49.70 | 34.45 | 21.63 | 6.81 | 28.91 | ||||||||||||
2005 | 2.03 | 10.04 | 9.42 | 30.83 | 39.23 | 52.73 | 55.35 | 51.26 | 46.07 | 36.45 | 23.83 | 10.87 | 30.68 | |||||||||||||
2006 | 18.00 | 3.07 | 16.90 | 34.17 | 41.87 | 42.93 | 54.84 | 49.84 | 36.37 | 27.13 | 22.37 | 17.29 | 30.40 | |||||||||||||
2007 | 8.42 | -2.07 | 20.35 | 26.90 | 43.03 | 49.77 | 52.47 | a | 49.58 | 44.43 | 36.74 | ----- | z | 2.45 | 30.19 | a | ||||||||||
2008 | -0.13 | a | -1.11 | a | 10.45 | 28.57 | 33.97 | 44.07 | 50.55 | 48.61 | 43.93 | 34.71 | 23.00 | -0.45 | 26.35 | |||||||||||
2009 | -13.03 | 5.78 | a | 15.94 | 26.83 | 36.23 | 47.90 | 48.26 | 50.23 | 45.63 | 33.58 | 26.53 | 3.45 | 27.28 | ||||||||||||
2010 | -0.52 | -1.00 | 22.77 | 33.37 | 38.61 | 51.83 | 51.54 | r | 59.07 | d | 42.73 | 33.61 | 23.47 | 5.90 | 28.17 | a | ||||||||||
2011 | -0.06 | 5.32 | 12.39 | 29.72 | a | 41.03 | 50.50 | 57.71 | 52.03 | 42.20 | 34.81 | 23.30 | 13.74 | 30.22 | ||||||||||||
2012 | 8.23 | 10.03 | 30.55 | 30.53 | 41.16 | 51.63 | 59.19 | 50.13 | 40.87 | 31.27 | a | 23.23 | 12.94 | 32.48 | ||||||||||||
2013 | 3.97 | 2.81 | a | 9.55 | 25.40 | 39.81 | 50.47 | 55.03 | 52.52 | 47.74 | c | 36.81 | 20.63 | -3.13 | 28.47 | |||||||||||
2014 | -9.97 | a | -9.44 | a | 7.81 | 25.43 | 41.42 | 53.31 | a | 53.87 | 54.32 | 45.10 | 34.55 | 13.83 | 14.58 | 27.07 | ||||||||||
2015 | 4.32 | -8.29 | 18.39 | 30.73 | 41.19 | 50.50 | 54.61 | 53.42 | 51.87 | 34.81 | 27.60 | 24.10 | 31.94 | |||||||||||||
2016 | 5.61 | 9.93 | 26.29 | 32.03 | 39.74 | 52.00 | 56.10 | 55.06 | 50.63 | 37.03 | 30.83 | 10.55 | 33.82 | |||||||||||||
2017 | 8.23 | 15.79 | 17.65 | 32.87 | 40.13 | 48.83 | 52.71 | 49.29 | 48.73 | 37.58 | 20.47 | 4.58 | 31.40 | |||||||||||||
2018 | 1.40 | a | -4.67 | a | 13.13 | 16.70 | 45.32 | 53.37 | 54.32 | 52.61 | 49.03 | 33.35 | 18.00 | 16.42 | 29.08 | |||||||||||
2019 | 0.29 | -0.75 | 9.74 | 28.47 | 37.61 | 48.80 | 57.23 | r | 51.74 | 50.90 | 34.52 | 18.03 | 8.29 | 26.15 | a | |||||||||||
2020 | 10.81 | 3.83 | 24.74 | 27.40 | 41.87 | 51.93 | 57.19 | 54.84 | 44.23 | 29.06 | 26.53 | 13.35 | 32.15 | |||||||||||||
2021 | 10.97 | -2.71 | 23.37 | a | 30.60 | 40.23 | 53.17 | 54.00 | 54.84 | 46.13 | 41.03 | 22.93 | 10.16 | 32.06 | ||||||||||||
2022 | -5.57 | a | -3.68 | 15.47 | a | 28.07 | 42.35 | 50.33 | 55.71 | 55.00 | 46.23 | 35.19 | 23.90 | 5.73 | a | 29.06 | ||||||||||
2023 | 12.19 | 8.14 | 15.26 | 30.03 | 42.71 | 51.00 | 51.90 | 53.10 | 52.13 | 39.35 | 18.80 | 25.19 | 33.32 | |||||||||||||
2024 | 13.45 | 16.41 | 21.61 | 30.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.38 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.25 | 2.79 | 16.00 | 29.39 | 39.77 | 49.89 | 55.20 | 52.78 | 44.37 | 33.79 | 21.32 | 7.73 | 29.72 | |||||||||||||
S.D. | 9.43 | 8.21 | 6.81 | 3.51 | 4.30 | 4.57 | 4.71 | 4.07 | 3.84 | 3.65 | 4.59 | 7.34 | 2.44 | |||||||||||||
SKEW | -0.41 | 0.13 | -0.06 | -0.67 | -0.14 | -0.20 | 0.57 | 0.53 | -0.14 | 0.19 | -0.43 | -0.37 | 0.12 | |||||||||||||
MAX | 20.67 | 20.11 | 30.55 | 36.62 | 51.03 | 61.83 | 69.19 | 66.39 | 52.13 | 43.19 | 30.83 | 25.19 | 35.00 | |||||||||||||
MIN | -24.82 | -14.07 | 0.52 | 16.70 | 28.87 | 37.20 | 44.32 | 44.13 | 35.15 | 26.39 | 10.52 | -12.77 | 25.60 | |||||||||||||
YRS | 65 | 60 | 65 | 63 | 66 | 60 | 59 | 63 | 65 | 64 | 64 | 67 | 46 |