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 | 56.08 | f | 62.90 | b | 57.45 | 45.50 | 35.94 | 26.33 | 14.52 | 40.44 | f | |||||
1958 | 12.42 | 4.07 | 21.19 | 34.33 | 43.97 | 52.50 | d | 55.84 | 56.48 | 50.17 | 38.94 | 25.23 | 5.16 | 33.36 | ||||||||||||
1959 | -2.06 | 4.86 | 19.81 | 34.53 | 48.87 | 56.87 | 58.06 | 62.87 | 50.87 | 35.81 | 17.10 | 21.87 | 34.12 | |||||||||||||
1960 | 10.61 | 10.66 | 10.26 | 35.73 | 45.81 | 51.20 | 56.87 | 59.81 | 52.03 | 36.71 | 26.87 | 10.03 | 33.88 | |||||||||||||
1961 | 6.00 | 15.04 | 26.00 | 29.53 | 41.45 | 54.27 | 57.77 | 58.55 | 49.10 | 38.29 | 24.90 | 10.35 | 34.27 | |||||||||||||
1962 | 1.65 | 6.71 | 18.39 | 31.73 | 51.74 | 53.83 | 56.32 | 55.45 | 46.03 | 41.19 | 26.59 | a | 12.42 | 33.51 | ||||||||||||
1963 | -3.71 | 3.36 | 23.23 | 34.57 | 43.90 | 55.57 | 58.74 | 54.48 | 49.73 | 45.58 | 28.97 | 2.87 | 33.11 | |||||||||||||
1964 | 10.81 | 12.76 | 18.13 | 34.60 | 47.52 | 54.10 | 59.52 | 54.68 | 47.43 | 35.00 | 26.87 | 6.00 | 33.95 | |||||||||||||
1965 | -0.94 | 2.32 | 11.10 | 32.70 | 48.16 | 53.33 | 56.48 | 54.58 | 45.80 | 36.70 | a | 24.17 | 19.87 | a | 32.02 | |||||||||||
1966 | -8.29 | 5.29 | 22.55 | 30.50 | 38.10 | 52.40 | 60.61 | 55.32 | 46.80 | 35.87 | 24.43 | 11.52 | 31.26 | |||||||||||||
1967 | 5.32 | -2.32 | 19.74 | 35.17 | 38.61 | 55.63 | 56.77 | 52.35 | 45.67 | 36.10 | 23.63 | 13.45 | 31.68 | |||||||||||||
1968 | 4.55 | 5.03 | 25.03 | 35.23 | 42.26 | 54.03 | 57.71 | 56.58 | 48.27 | 40.61 | 26.13 | 10.52 | 33.83 | |||||||||||||
1969 | 0.90 | 8.21 | 14.03 | 35.27 | 45.03 | 48.90 | 58.19 | 57.35 | 47.90 | 36.94 | 22.80 | 13.29 | 32.40 | |||||||||||||
1970 | -3.87 | 3.64 | 14.71 | 34.43 | 47.32 | 57.17 | 59.68 | 56.42 | 49.50 | 40.10 | 25.33 | 10.97 | 32.95 | |||||||||||||
1971 | -3.00 | 6.43 | 17.13 | 31.43 | 39.81 | 59.93 | 55.94 | 54.29 | 50.70 | 45.16 | 26.53 | 11.52 | 32.99 | |||||||||||||
1972 | -0.19 | -0.17 | 16.13 | 30.23 | 47.32 | 50.90 | 57.19 | 58.90 | 48.53 | 35.71 | 28.43 | 5.13 | 31.51 | |||||||||||||
1973 | 6.90 | 11.14 | 31.13 | 30.22 | l | 43.29 | 56.67 | 58.87 | 60.32 | 50.83 | 44.13 | 27.66 | a | 9.81 | 36.43 | a | ||||||||||
1974 | 4.10 | 6.38 | b | 22.19 | 35.90 | 44.67 | a | 51.37 | 63.26 | 55.94 | 43.57 | 39.29 | 28.34 | a | 17.90 | 34.41 | ||||||||||
1975 | 7.39 | 9.30 | a | 15.48 | 30.40 | 49.03 | 56.60 | 63.10 | 58.87 | 46.57 | 39.81 | 26.97 | a | 12.97 | 34.71 | |||||||||||
1976 | 0.00 | 17.10 | 23.81 | 37.03 | a | 42.84 | 56.10 | 58.39 | 56.48 | 46.83 | 32.42 | 18.40 | -1.19 | 32.35 | ||||||||||||
1977 | -8.45 | 10.93 | 26.46 | c | 40.57 | 52.58 | 55.38 | a | 62.42 | 53.97 | a | 52.03 | 36.94 | 23.90 | 8.74 | 34.62 | ||||||||||
1978 | -3.10 | -3.21 | 17.52 | 32.97 | 45.97 | 53.73 | 59.16 | 57.13 | 52.73 | 38.35 | 20.60 | 4.23 | 31.34 | |||||||||||||
1979 | -6.65 | -1.25 | 19.90 | 30.83 | 41.06 | 53.47 | 58.03 | 56.03 | 48.67 | 35.42 | 24.53 | 15.57 | a | 31.30 | ||||||||||||
1980 | 3.93 | a | 3.52 | 13.97 | 33.23 | 44.42 | 54.37 | 60.13 | 59.19 | 48.97 | 34.06 | 25.33 | 11.57 | a | 32.72 | |||||||||||
1981 | 6.94 | 12.86 | 23.39 | 36.40 | 41.60 | a | 55.38 | a | 59.35 | 59.03 | 46.81 | c | 35.97 | 26.07 | 11.45 | 34.60 | ||||||||||
1982 | -8.06 | 5.00 | 19.74 | 29.93 | 49.87 | a | 48.73 | 60.97 | 56.52 | 50.40 | 40.16 | 23.63 | 18.74 | 32.97 | ||||||||||||
1983 | 11.35 | 19.23 | b | 25.93 | a | 31.13 | 42.29 | 54.70 | 64.07 | b | 62.03 | 50.43 | 39.03 | 29.14 | a | -2.90 | 35.54 | |||||||||
1984 | 2.47 | a | 19.19 | b | 17.13 | 35.07 | 42.13 | 56.27 | 58.10 | a | 61.19 | 45.83 | 42.90 | 23.90 | 10.00 | a | 34.51 | |||||||||
1985 | 1.77 | 5.86 | 26.35 | 39.23 | 49.84 | 51.17 | 57.26 | 55.58 | 49.80 | 36.55 | 18.90 | -1.65 | 32.56 | |||||||||||||
1986 | 7.60 | a | 7.30 | a | 24.42 | 38.47 | 47.16 | 56.23 | 63.29 | 55.13 | 50.80 | 37.97 | 21.47 | 16.55 | 35.53 | |||||||||||
1987 | 14.37 | a | 19.96 | 26.32 | 35.87 | 48.45 | 56.37 | 63.68 | 58.52 | 49.80 | 32.61 | 31.17 | a | 18.81 | 37.99 | |||||||||||
1988 | -2.59 | b | 3.14 | a | 23.39 | 32.37 | 46.35 | 57.10 | 60.42 | 61.06 | 49.60 | 31.65 | 26.67 | 10.61 | 33.31 | |||||||||||
1989 | 11.60 | a | -1.07 | a | 16.06 | 32.57 | 43.81 | 52.33 | 62.48 | 57.61 | 47.30 | 33.97 | 21.40 | 1.42 | 31.62 | |||||||||||
1990 | 16.06 | 10.64 | 24.74 | 34.30 | 42.03 | 54.93 | 56.71 | 56.32 | 50.73 | 34.45 | 27.70 | 7.73 | a | 34.70 | ||||||||||||
1991 | 3.65 | 12.21 | 22.94 | 34.93 | 51.32 | 59.43 | 59.52 | 56.87 | 49.50 | 35.19 | 18.53 | 12.45 | 34.71 | |||||||||||||
1992 | 14.16 | 22.14 | 21.71 | 33.80 | 45.03 | 50.77 | 53.87 | 52.42 | 47.50 | 34.42 | 27.17 | 14.97 | 34.83 | |||||||||||||
1993 | 4.80 | a | 8.50 | 18.94 | 31.57 | 44.23 | 49.77 | 59.13 | 56.84 | 40.30 | 33.52 | 21.97 | 16.55 | 32.17 | ||||||||||||
1994 | -5.94 | 2.71 | 23.33 | a | 32.27 | 43.68 | 54.64 | b | 56.93 | a | 52.58 | 50.10 | 39.32 | 28.27 | 15.03 | 32.74 | ||||||||||
1995 | 9.48 | 9.25 | 21.19 | 30.30 | 42.32 | 57.00 | 59.97 | a | 64.23 | 46.70 | 39.10 | 18.93 | 8.84 | 33.94 | ||||||||||||
1996 | -1.77 | 8.24 | 13.84 | 29.23 | 41.74 | 53.27 | 54.30 | a | 53.94 | 42.96 | b | 35.31 | b | 18.53 | 7.97 | 29.80 | ||||||||||
1997 | 3.00 | 11.07 | 22.52 | 31.03 | 41.43 | a | 55.63 | 60.00 | 56.81 | 51.97 | 40.10 | a | 23.47 | 21.77 | 34.90 | |||||||||||
1998 | 13.26 | 24.89 | a | 24.71 | 38.90 | 50.42 | 55.30 | 60.26 | 59.68 | 52.97 | 41.68 | 30.20 | 16.58 | 39.07 | ||||||||||||
1999 | 5.58 | 18.93 | 22.32 | 37.73 | 49.71 | 56.50 | 64.23 | 58.55 | 49.48 | a | 37.77 | 29.73 | 15.13 | 37.14 | ||||||||||||
2000 | 5.84 | 18.41 | 28.94 | 33.90 | 48.58 | 55.50 | 60.81 | 60.13 | 49.47 | 42.00 | 26.83 | a | 1.16 | 35.96 | ||||||||||||
2001 | 13.29 | 5.43 | 19.48 | 38.07 | 49.03 | 56.60 | 60.16 | 60.77 | 49.97 | 38.16 | 35.80 | 21.94 | 37.39 | |||||||||||||
2002 | 17.58 | 21.14 | 17.97 | 35.07 | 41.67 | a | 59.03 | 65.32 | 60.00 | 53.80 | 35.94 | 24.34 | a | 18.52 | 37.53 | |||||||||||
2003 | 7.84 | 7.07 | 20.81 | 34.57 | 44.81 | 53.60 | 60.19 | 59.87 | 49.83 | 38.26 | 26.53 | 17.87 | 35.10 | |||||||||||||
2004 | 5.10 | 13.00 | 25.77 | 34.70 | 46.03 | 52.93 | 58.65 | 54.68 | 54.13 | 41.06 | 29.83 | a | 15.32 | 35.93 | ||||||||||||
2005 | 9.68 | 17.30 | a | 19.03 | 37.41 | a | 45.32 | 60.43 | 61.67 | a | 58.32 | 53.97 | a | 41.10 | 28.07 | 13.94 | 37.19 | |||||||||
2006 | 23.42 | 12.54 | 24.10 | 40.60 | 48.97 | 55.80 | 63.42 | 60.43 | a | 48.63 | 35.81 | 29.55 | a | 23.26 | 38.88 | |||||||||||
2007 | 14.87 | 5.29 | 27.42 | 34.37 | 49.43 | a | 57.80 | 61.77 | a | 60.47 | a | 52.97 | 45.06 | 25.83 | 9.42 | 37.06 | ||||||||||
2008 | 5.20 | a | 5.14 | 18.39 | 33.23 | 41.06 | 54.50 | 58.65 | 55.48 | 51.13 | 38.32 | 26.23 | 4.94 | 32.69 | ||||||||||||
2009 | -8.03 | 7.54 | 16.29 | 31.33 | 43.16 | 52.40 | 53.00 | 54.34 | b | 49.83 | 34.71 | 29.53 | 10.35 | 31.21 | ||||||||||||
2010 | 2.32 | 4.43 | 25.29 | 36.50 | 44.94 | 55.93 | 60.74 | 61.16 | 46.23 | 36.39 | 24.57 | 6.48 | 33.75 | |||||||||||||
2011 | 0.53 | a | 5.37 | a | 15.10 | 32.24 | a | 43.03 | 54.52 | a | 63.53 | a | 57.61 | 47.17 | a | 38.00 | 27.93 | a | 16.61 | 33.47 | ||||||
2012 | 11.26 | 16.43 | a | 33.87 | 34.90 | 48.16 | 54.77 | 63.94 | 53.35 | 43.10 | 32.63 | a | 23.97 | 13.67 | a | 35.84 | ||||||||||
2013 | 4.58 | 7.25 | 12.26 | 27.52 | a | 43.43 | a | 54.87 | 59.16 | 56.13 | 49.00 | 36.84 | 20.83 | 2.73 | a | 31.22 | ||||||||||
2014 | -6.03 | -7.96 | 10.13 | a | 29.67 | 43.42 | 56.53 | 57.32 | 58.55 | 48.10 | 35.68 | 16.53 | 18.71 | 30.05 | ||||||||||||
2015 | 6.74 | -1.61 | 19.19 | 33.53 | 45.39 | 54.97 | a | 58.77 | 56.52 | 55.03 | 37.90 | 30.60 | 24.84 | 35.16 | ||||||||||||
2016 | 6.48 | 13.28 | 29.13 | 34.03 | 43.24 | b | 56.90 | 60.23 | 59.84 | 53.72 | a | 39.32 | 31.23 | 13.77 | 36.77 | |||||||||||
2017 | 10.84 | 16.57 | 19.94 | 34.57 | 43.81 | 53.40 | 58.90 | 55.10 | b | 51.41 | a | 39.29 | 21.37 | 10.10 | 34.61 | |||||||||||
2018 | 1.45 | 0.29 | 18.58 | 21.21 | a | 51.32 | 59.63 | 59.29 | 57.42 | 52.13 | 34.97 | 19.03 | 16.24 | b | 32.63 | |||||||||||
2019 | 5.32 | 0.36 | 11.43 | a | 31.03 | 42.00 | d | 52.90 | 61.55 | 55.60 | a | 54.10 | 36.77 | 22.50 | 12.00 | 32.13 | ||||||||||
2020 | 11.23 | 6.34 | 26.10 | 30.31 | a | 45.90 | 56.76 | a | 61.45 | 58.52 | 47.37 | 30.90 | 27.66 | a | 13.52 | 34.67 | ||||||||||
2021 | 12.71 | 1.07 | 26.71 | 32.23 | 43.28 | b | 59.03 | 59.71 | 58.17 | a | 48.43 | 43.77 | a | 25.27 | 13.81 | 35.35 | ||||||||||
2022 | -5.19 | 0.54 | 15.94 | n | 29.57 | i | 45.20 | a | 54.27 | 59.39 | 57.58 | 49.60 | 35.00 | 24.80 | 8.39 | 32.96 | b | |||||||||
2023 | 14.32 | 6.04 | 15.53 | a | 32.70 | 45.30 | a | 55.53 | 57.03 | 57.77 | a | 53.72 | a | 40.65 | 23.69 | a | 24.52 | 35.57 | ||||||||
2024 | 16.06 | 18.69 | 22.23 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.99 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 4.92 | 8.35 | 20.77 | 33.59 | 45.21 | 54.89 | 59.57 | 57.41 | 49.26 | 37.69 | 25.22 | 12.11 | 34.05 | |||||||||||||
S.D. | 7.27 | 6.99 | 5.16 | 3.24 | 3.33 | 2.53 | 2.64 | 2.58 | 2.96 | 3.30 | 3.81 | 6.26 | 2.08 | |||||||||||||
SKEW | 0.01 | 0.28 | -0.03 | -0.55 | 0.25 | -0.19 | -0.01 | 0.21 | -0.40 | 0.41 | -0.19 | -0.25 | 0.33 | |||||||||||||
MAX | 23.42 | 24.89 | 33.87 | 40.60 | 52.58 | 60.43 | 65.32 | 64.23 | 55.03 | 45.58 | 35.80 | 24.84 | 39.07 | |||||||||||||
MIN | -8.45 | -7.96 | 10.13 | 21.21 | 38.10 | 48.73 | 53.00 | 52.35 | 40.30 | 30.90 | 16.53 | -2.90 | 29.80 | |||||||||||||
YRS | 67 | 67 | 66 | 64 | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 64 |