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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.80 | 55.68 | 55.81 | 47.50 | 36.39 | 23.13 | 6.90 | 39.60 | e | |||||||
1962 | -3.55 | 1.61 | 16.29 | 29.90 | 49.77 | 51.24 | a | 52.94 | 52.77 | 42.63 | 37.97 | 25.33 | 8.48 | 30.45 | ||||||||||||
1963 | -7.19 | -1.82 | 19.65 | 32.20 | 41.10 | 51.80 | 54.65 | 51.94 | 47.60 | 41.68 | 25.93 | -2.00 | a | 29.63 | ||||||||||||
1964 | 7.19 | 5.86 | 13.61 | 32.43 | 44.52 | 51.13 | 56.94 | 52.06 | 45.57 | 34.74 | 23.83 | 0.48 | 30.70 | |||||||||||||
1965 | -6.39 | -3.71 | 5.61 | 30.27 | 46.23 | 50.47 | 53.39 | 52.13 | 43.00 | 36.29 | 22.93 | 17.32 | 28.96 | |||||||||||||
1966 | -11.65 | 2.07 | 21.71 | 29.27 | 35.84 | 51.80 | 58.61 | 52.65 | 44.33 | 32.81 | 20.93 | 7.74 | 28.84 | |||||||||||||
1967 | 2.00 | -6.71 | 16.58 | 32.93 | 35.55 | 53.20 | 54.10 | 50.45 | 42.70 | 33.55 | 20.40 | 9.45 | 28.68 | |||||||||||||
1968 | 0.16 | -0.76 | 23.57 | a | 34.10 | 39.84 | 52.63 | 56.48 | 54.87 | 47.43 | 40.19 | 23.83 | 7.32 | 31.64 | ||||||||||||
1969 | -1.74 | 5.82 | 10.58 | 33.40 | 43.68 | 46.90 | 56.65 | 55.19 | 46.60 | 35.06 | 21.83 | 10.87 | 30.40 | |||||||||||||
1970 | -7.23 | -2.25 | 9.65 | 30.03 | 45.03 | 54.70 | 58.19 | 54.19 | 47.50 | 38.23 | 23.00 | 9.19 | 30.02 | |||||||||||||
1971 | -5.97 | 4.61 | 14.19 | 29.17 | 37.32 | 57.17 | 52.90 | 51.26 | 48.70 | 43.19 | 23.50 | 8.90 | b | 30.41 | ||||||||||||
1972 | -7.94 | -3.66 | 11.84 | 28.43 | 45.32 | 48.63 | 56.23 | 56.90 | 45.87 | 32.35 | 26.47 | 1.65 | 28.51 | |||||||||||||
1973 | 3.48 | 6.61 | 29.65 | 29.97 | 40.94 | 53.77 | 57.58 | 58.94 | 48.07 | 41.55 | 24.87 | 6.84 | 33.52 | |||||||||||||
1974 | 0.32 | 1.46 | 19.29 | 32.43 | 41.81 | 48.37 | 59.26 | 52.13 | 39.73 | 35.71 | 25.60 | 13.94 | 30.84 | |||||||||||||
1975 | 2.65 | 6.36 | 9.35 | 27.00 | c | 44.68 | 54.27 | 57.94 | 53.94 | 42.87 | 33.70 | d | 24.00 | 9.53 | a | 30.52 | ||||||||||
1976 | -5.55 | 12.48 | 16.90 | a | ----- | z | ----- | z | 50.79 | p | 53.77 | 52.42 | 41.13 | 27.87 | 12.30 | -5.65 | 22.85 | c | ||||||||
1977 | -12.61 | 7.14 | 23.57 | c | 35.08 | d | 49.06 | 51.04 | c | 58.77 | 50.35 | 49.03 | 33.42 | 21.03 | a | 5.48 | 30.95 | |||||||||
1978 | -6.97 | -7.29 | 12.03 | 29.77 | 41.97 | 50.50 | 55.87 | 55.00 | 50.03 | 35.00 | 16.30 | -0.68 | 27.63 | |||||||||||||
1979 | -11.52 | -7.04 | 15.81 | 27.93 | 34.50 | o | ----- | z | ----- | z | 54.42 | 47.00 | 32.58 | 21.63 | 13.39 | 21.58 | c | |||||||||
1980 | 2.00 | 0.55 | 11.77 | 31.90 | 41.39 | 49.10 | 54.39 | 55.19 | 47.63 | 32.77 | 25.20 | 9.61 | 30.13 | |||||||||||||
1981 | 5.77 | 12.21 | 24.29 | 35.37 | 41.03 | 53.73 | 58.10 | 57.45 | b | 44.57 | 33.71 | 24.00 | 8.81 | 33.25 | ||||||||||||
1982 | -11.16 | 0.39 | 16.20 | a | 27.93 | 46.80 | a | 45.57 | 58.35 | 53.26 | 46.73 | 38.16 | 21.33 | 16.00 | 29.96 | |||||||||||
1983 | 7.57 | a | 17.46 | 23.97 | 28.37 | 37.97 | 51.37 | 60.39 | 58.39 | 47.90 | 37.19 | 26.97 | -5.55 | 32.67 | ||||||||||||
1984 | -1.68 | 16.90 | 13.19 | 33.87 | 39.94 | 54.77 | 54.68 | 59.10 | 43.87 | 40.97 | 22.00 | 8.87 | a | 32.20 | ||||||||||||
1985 | -1.23 | 3.64 | 23.81 | 36.80 | 46.77 | 48.17 | 53.71 | 51.13 | 44.90 | 32.58 | 13.48 | a | -6.77 | 28.92 | ||||||||||||
1986 | 3.77 | a | 1.25 | 19.43 | a | 33.73 | 42.87 | 50.77 | 60.03 | 51.26 | 47.33 | 34.58 | 18.43 | 11.57 | a | 31.25 | ||||||||||
1987 | 7.29 | 15.71 | 23.74 | 32.17 | 45.97 | 54.45 | a | 60.97 | a | 55.07 | b | 46.57 | 29.81 | 28.00 | 16.39 | 34.68 | ||||||||||
1988 | -2.97 | 0.83 | 21.35 | 30.72 | a | 45.61 | 54.52 | a | 59.84 | 60.39 | 48.07 | a | 29.97 | 25.43 | 8.48 | 31.85 | ||||||||||
1989 | 6.74 | -3.75 | 13.90 | 30.39 | b | 42.53 | a | 51.63 | 59.35 | 56.45 | 45.90 | 35.48 | 18.67 | -1.32 | 29.67 | |||||||||||
1990 | 13.67 | a | 5.33 | a | 23.03 | 35.03 | 40.67 | a | 56.13 | 58.61 | 56.90 | 50.60 | 33.45 | 27.43 | 6.71 | 33.96 | ||||||||||
1991 | 0.55 | 9.07 | a | 20.74 | 34.60 | 51.13 | 59.63 | 59.71 | 57.68 | 47.90 | 34.73 | a | 17.67 | l | 12.55 | 35.30 | a | |||||||||
1992 | 8.03 | 16.69 | 21.10 | 30.20 | 45.03 | 50.47 | 52.81 | 51.42 | ----- | z | 34.71 | 25.53 | 11.48 | 31.59 | a | |||||||||||
1993 | 2.74 | 6.11 | 15.26 | 30.47 | 44.61 | 51.50 | 57.77 | 55.12 | f | 38.87 | 30.55 | 20.03 | 8.70 | a | 27.87 | a | ||||||||||
1994 | -11.74 | -4.25 | 20.84 | 30.13 | 41.93 | a | 53.93 | 54.94 | 52.68 | 49.60 | 37.70 | a | 25.43 | 11.18 | c | 30.20 | ||||||||||
1995 | 5.33 | a | 2.36 | 19.38 | b | 27.87 | 41.20 | a | 56.73 | 57.48 | b | 60.48 | 42.34 | a | 36.41 | b | 14.64 | b | 2.90 | a | 30.59 | |||||
1996 | -7.47 | a | 2.21 | 8.90 | 26.63 | 40.73 | a | 52.89 | b | 55.35 | 52.71 | 45.90 | 33.19 | 15.45 | a | 2.81 | 27.44 | |||||||||
1997 | -2.06 | 6.00 | a | 17.90 | b | 27.57 | 36.53 | a | 53.48 | a | 56.97 | a | 52.03 | b | 46.69 | a | 35.81 | 19.10 | 17.13 | 30.60 | ||||||
1998 | 7.87 | 21.52 | a | 19.45 | b | 34.63 | k | ----- | z | 52.93 | 58.72 | b | 57.55 | 48.14 | a | 37.50 | a | 27.59 | a | 11.48 | b | 34.28 | b | |||
1999 | -2.42 | 14.89 | 17.93 | c | 35.27 | 47.29 | 54.93 | 63.17 | y | 56.00 | a | 44.23 | 33.00 | a | 28.32 | b | ----- | z | 32.94 | b | ||||||
2000 | 0.43 | a | 9.70 | b | 26.35 | 31.21 | a | 46.34 | b | 51.97 | 57.81 | 57.13 | 44.53 | 37.71 | 22.97 | a | -4.77 | 31.78 | ||||||||
2001 | 5.53 | a | -3.39 | 14.52 | d | 34.17 | 45.77 | 54.93 | a | 57.10 | 57.39 | 43.93 | a | 33.10 | 32.14 | a | 18.23 | 32.78 | ||||||||
2002 | 11.93 | a | 14.61 | 11.36 | f | 30.86 | b | 37.67 | a | 56.90 | 62.90 | a | 56.29 | 48.90 | a | 32.17 | a | 21.17 | 14.48 | 35.26 | a | |||||
2003 | 2.65 | -1.63 | a | 15.41 | b | 31.48 | a | 41.53 | a | 52.34 | a | 57.53 | a | 56.93 | a | 45.69 | a | 34.94 | 22.53 | 12.17 | a | 30.97 | ||||
2004 | -0.94 | 4.61 | a | 21.87 | 30.55 | a | 39.90 | 50.13 | 55.97 | 50.03 | 50.27 | 36.63 | a | 26.67 | c | 9.59 | b | 31.27 | ||||||||
2005 | 3.90 | 12.37 | a | 12.41 | b | 34.40 | 41.87 | 57.80 | 58.30 | a | 46.86 | b | 39.46 | b | 34.32 | 23.20 | 10.58 | 31.29 | ||||||||
2006 | 17.19 | 5.61 | 19.84 | 36.24 | a | 46.70 | a | 52.62 | a | 60.19 | 56.45 | 43.40 | 30.27 | a | 25.03 | 19.50 | a | 34.42 | ||||||||
2007 | 9.06 | -0.11 | 23.35 | 30.53 | 46.26 | 54.13 | 57.42 | 56.58 | 47.70 | 42.35 | 23.38 | a | 3.50 | a | 32.85 | |||||||||||
2008 | 0.57 | a | -1.74 | b | 11.26 | 29.63 | 38.10 | a | 53.27 | 56.90 | 53.10 | 48.07 | 34.32 | 23.27 | -2.10 | 28.72 | ||||||||||
2009 | -10.87 | 6.11 | 17.03 | 32.24 | a | 42.45 | 52.38 | a | 51.97 | a | 52.50 | a | 47.13 | 33.68 | 29.73 | 8.48 | 30.24 | |||||||||
2010 | 1.32 | 2.43 | 23.45 | 35.93 | 44.48 | 54.67 | 59.90 | 59.39 | 45.03 | 35.29 | 23.53 | 4.90 | 32.53 | |||||||||||||
2011 | -1.19 | 3.67 | a | 12.13 | 30.70 | 43.00 | 53.20 | 62.32 | 55.71 | 46.00 | 37.40 | a | 26.75 | b | 15.77 | 32.12 | ||||||||||
2012 | 8.97 | 15.97 | 33.94 | 33.67 | 48.16 | 55.10 | a | 62.00 | 52.41 | d | 41.53 | 30.55 | 23.33 | 12.48 | 34.84 | |||||||||||
2013 | 2.77 | 3.39 | 7.84 | 27.17 | 41.90 | a | 55.28 | a | 58.43 | a | 56.00 | d | 49.04 | b | 36.81 | 20.40 | -3.55 | b | 29.62 | |||||||
2014 | -8.90 | -10.75 | 9.13 | a | 28.23 | d | 44.23 | 56.38 | a | 56.65 | 57.78 | d | 47.52 | a | 35.07 | a | 15.50 | 17.71 | 29.04 | |||||||
2015 | 5.10 | -4.39 | 19.71 | 32.37 | 44.19 | 54.17 | 57.97 | 55.87 | 55.55 | a | 36.87 | 29.37 | 24.74 | 34.29 | ||||||||||||
2016 | 5.13 | 9.41 | 28.61 | 32.85 | c | 42.52 | 55.21 | a | 59.42 | 58.19 | 52.13 | 38.19 | 30.87 | 10.97 | 35.29 | |||||||||||
2017 | 8.42 | 17.11 | 19.48 | 35.10 | 42.61 | 52.90 | 56.93 | a | 53.55 | 50.40 | 38.65 | 20.17 | 6.58 | 33.49 | ||||||||||||
2018 | -0.13 | -3.57 | 16.10 | 19.07 | 48.35 | 58.03 | 57.39 | 56.45 | 51.07 | 33.26 | 18.50 | 15.61 | 30.84 | |||||||||||||
2019 | 4.35 | -1.68 | 9.84 | 31.23 | 39.94 | 52.27 | 60.10 | 54.23 | 51.27 | 35.06 | 21.00 | 8.58 | 30.52 | |||||||||||||
2020 | 8.32 | 1.79 | 24.19 | 28.77 | 43.81 | 54.40 | 59.87 | 56.77 | 45.83 | 29.58 | 27.27 | 11.81 | 32.70 | |||||||||||||
2021 | 10.39 | -2.50 | 25.68 | 32.10 | 42.68 | 57.20 | 57.39 | 56.65 | 46.17 | 41.90 | 23.73 | 11.03 | 33.53 | |||||||||||||
2022 | -6.94 | -1.25 | 18.16 | 29.50 | 45.39 | 53.27 | 57.81 | 55.74 | 48.00 | 35.61 | 24.27 | 5.00 | 30.38 | |||||||||||||
2023 | 12.06 | 3.11 | 13.58 | 32.93 | a | 46.10 | 54.83 | 55.19 | 55.81 | 52.60 | 40.26 | 23.50 | 24.74 | 34.56 | ||||||||||||
2024 | 13.41 | d | 18.76 | 21.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.77 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.96 | 4.18 | 17.92 | 31.24 | 43.16 | 53.11 | 57.37 | 54.84 | 46.55 | 35.37 | 23.10 | 8.65 | 31.24 | |||||||||||||
S.D. | 7.22 | 7.43 | 5.86 | 3.03 | 3.46 | 2.75 | 2.45 | 2.82 | 3.24 | 3.35 | 4.08 | 7.03 | 1.95 | |||||||||||||
SKEW | -0.07 | 0.45 | 0.17 | -0.88 | -0.12 | -0.26 | -0.13 | -0.24 | -0.08 | 0.28 | -0.46 | -0.22 | 0.27 | |||||||||||||
MAX | 17.19 | 21.52 | 33.94 | 36.80 | 51.13 | 59.63 | 62.90 | 60.48 | 55.55 | 43.19 | 32.14 | 24.74 | 35.29 | |||||||||||||
MIN | -12.61 | -10.75 | 5.61 | 19.07 | 35.55 | 45.57 | 51.97 | 46.86 | 38.87 | 27.87 | 12.30 | -6.77 | 27.44 | |||||||||||||
YRS | 63 | 63 | 62 | 60 | 59 | 61 | 61 | 62 | 62 | 63 | 62 | 62 | 54 |