YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.07 | p | 52.45 | 44.41 | a | 39.58 | 22.97 | a | 10.37 | a | 33.96 | g | ||
1947 | 6.03 | 0.89 | 14.97 | 30.70 | 36.16 | l | 50.43 | 55.48 | 62.07 | a | 48.67 | 44.48 | 18.03 | 4.70 | a | 30.59 | a | |||||||||
1948 | -8.07 | d | -0.81 | b | 11.19 | 33.54 | d | 39.73 | a | 49.45 | a | 55.83 | b | 54.81 | 47.60 | 32.61 | 28.73 | 6.61 | 29.27 | |||||||
1949 | 5.26 | 1.00 | 16.55 | 31.13 | 44.13 | 55.70 | 59.94 | 55.84 | 41.83 | 37.16 | 23.37 | 6.45 | 31.53 | |||||||||||||
1950 | -5.97 | a | 0.07 | 9.48 | 25.67 | 40.26 | 50.00 | 52.19 | 48.00 | 44.63 | 39.19 | 16.59 | a | -3.55 | 26.38 | |||||||||||
1951 | -3.65 | 1.43 | 9.16 | 31.30 | 44.48 | 48.40 | 54.03 | 51.35 | 42.20 | 35.35 | 12.23 | 6.94 | 27.77 | |||||||||||||
1952 | -0.13 | 9.86 | 13.23 | 34.27 | 40.83 | b | 53.93 | 58.42 | 53.55 | 44.93 | 26.39 | 22.83 | a | 14.84 | 31.08 | |||||||||||
1953 | 6.81 | 0.71 | 17.58 | 29.67 | 42.61 | 53.67 | 56.48 | 57.28 | b | 45.33 | 38.71 | 25.20 | 10.48 | 32.04 | ||||||||||||
1954 | -1.35 | 14.93 | 14.45 | 31.43 | 37.26 | 54.73 | 56.90 | 52.48 | 45.50 | 35.65 | 26.47 | 12.35 | 31.73 | |||||||||||||
1955 | 0.87 | 0.25 | 9.81 | 37.97 | 44.45 | 52.13 | 61.26 | 57.61 | 44.50 | 36.13 | 17.00 | c | -0.90 | 30.09 | ||||||||||||
1956 | 0.90 | -2.76 | 9.16 | 27.73 | 41.29 | 54.63 | 53.55 | 53.55 | 41.67 | 38.81 | 20.87 | 10.42 | 29.15 | |||||||||||||
1957 | -7.35 | 3.32 | 16.58 | 32.83 | 40.16 | 51.23 | 57.90 | 51.97 | 42.23 | 31.87 | 20.73 | 7.58 | 29.09 | |||||||||||||
1958 | 5.87 | -2.46 | 19.81 | 31.53 | 39.55 | 46.03 | 52.61 | 51.45 | 45.97 | 37.00 | 23.13 | 0.68 | 29.26 | |||||||||||||
1959 | -5.55 | -3.64 | 13.13 | 31.77 | 46.39 | 53.07 | 55.03 | 58.84 | 46.93 | 32.81 | 10.80 | 17.00 | 29.71 | |||||||||||||
1960 | 6.16 | 4.62 | 3.13 | 31.57 | 42.16 | 48.23 | 53.90 | 56.39 | 48.57 | 34.87 | 24.63 | 5.10 | 29.94 | |||||||||||||
1961 | 0.97 | 11.25 | 20.52 | 28.03 | 37.61 | 49.33 | 53.45 | 52.74 | 44.50 | 33.80 | a | 17.80 | 2.16 | 29.35 | ||||||||||||
1962 | -5.61 | -1.14 | 13.23 | 27.17 | 45.52 | 49.10 | 50.03 | 50.13 | 39.37 | 34.16 | 22.75 | b | 4.13 | 27.40 | ||||||||||||
1963 | -8.03 | -5.39 | 17.74 | 33.00 | 41.45 | 52.40 | 54.16 | 49.35 | 43.37 | 40.42 | 23.60 | -4.68 | 28.12 | |||||||||||||
1964 | 2.00 | 5.83 | 15.84 | 33.37 | 46.23 | 50.60 | 55.77 | 49.97 | 43.50 | 31.45 | 23.37 | -1.68 | 29.69 | |||||||||||||
1965 | -4.16 | -4.00 | 9.58 | 30.20 | 45.68 | 49.30 | 51.42 | 50.42 | 40.27 | 31.26 | 19.43 | 13.94 | 27.78 | |||||||||||||
1966 | -14.13 | 0.57 | 17.87 | 27.37 | c | 33.29 | 48.30 | 53.00 | a | 46.42 | 42.83 | a | 33.48 | 22.20 | 7.94 | 26.60 | ||||||||||
1967 | 3.71 | -6.77 | b | 14.97 | 32.60 | 35.58 | 53.07 | 53.35 | 48.81 | 42.10 | 33.03 | 20.20 | 9.68 | 28.36 | ||||||||||||
1968 | 1.35 | -0.52 | 23.33 | a | 33.66 | a | 40.10 | 50.80 | 53.19 | 54.13 | 48.17 | 38.94 | 24.63 | 6.35 | 31.18 | |||||||||||
1969 | -2.68 | 4.50 | 10.68 | 35.70 | 43.65 | 47.13 | 56.97 | 56.29 | 46.24 | a | 34.80 | a | 22.73 | 10.81 | 30.57 | |||||||||||
1970 | -6.61 | -1.50 | 12.48 | 33.57 | 44.33 | a | 54.97 | a | 58.90 | b | 54.27 | a | 47.53 | 40.45 | 24.27 | 9.35 | 31.00 | |||||||||
1971 | -6.39 | 2.68 | 13.03 | a | 30.52 | a | 40.03 | a | 57.10 | 53.97 | 51.42 | 48.37 | 43.00 | 25.13 | 8.74 | 30.63 | ||||||||||
1972 | -9.19 | -3.21 | 10.81 | 29.33 | 47.13 | 48.55 | a | 55.61 | 56.06 | 45.30 | 31.27 | a | 25.83 | 2.29 | 28.32 | |||||||||||
1973 | 4.42 | 8.32 | 30.10 | 32.23 | 40.71 | 54.77 | 57.35 | 58.16 | 45.90 | 38.94 | 23.60 | 7.03 | 33.46 | |||||||||||||
1974 | 3.32 | 0.68 | 17.00 | a | 31.43 | 39.20 | a | 47.40 | 56.87 | 52.00 | 39.17 | 32.50 | a | 25.80 | 13.81 | 29.93 | ||||||||||
1975 | 1.74 | 3.61 | 8.39 | 25.97 | 45.52 | 52.52 | a | 57.52 | 52.87 | 41.80 | 35.46 | c | 26.59 | a | 7.58 | 29.96 | ||||||||||
1976 | -6.65 | 9.69 | 14.00 | 33.33 | 38.97 | 51.23 | 52.93 | a | 50.00 | 37.90 | 26.70 | a | 11.03 | -8.06 | 25.92 | |||||||||||
1977 | -17.35 | 0.58 | b | 23.03 | 34.97 | 47.42 | 49.27 | 57.10 | a | 47.23 | 45.40 | 31.55 | 19.77 | 3.13 | 28.51 | |||||||||||
1978 | -7.42 | -6.68 | 9.74 | 29.17 | 42.00 | 49.27 | 55.06 | 54.10 | 47.53 | 32.10 | 17.70 | 0.24 | b | 26.90 | ||||||||||||
1979 | -10.13 | a | -4.82 | 17.35 | 31.27 | 39.52 | 51.27 | 57.13 | 54.26 | 46.80 | 34.06 | 22.53 | 11.97 | 29.27 | ||||||||||||
1980 | 1.87 | 2.03 | 12.20 | a | 33.63 | 43.77 | 51.40 | 58.00 | 56.55 | 45.37 | 31.52 | 23.57 | 8.00 | 30.66 | ||||||||||||
1981 | 2.48 | 10.79 | 21.90 | 34.60 | 40.90 | 53.47 | 56.87 | 56.84 | 42.90 | 32.32 | 26.13 | 5.97 | 32.10 | |||||||||||||
1982 | -9.77 | 0.57 | 16.23 | 28.14 | a | 49.19 | 46.40 | 58.71 | 53.65 | 46.47 | 37.30 | a | 22.50 | 16.27 | a | 30.47 | ||||||||||
1983 | 8.26 | 17.07 | 24.39 | 30.57 | 38.87 | 53.00 | 61.06 | 59.57 | a | 48.43 | 37.03 | 25.76 | a | -6.39 | 33.14 | |||||||||||
1984 | 0.43 | a | 18.69 | 12.74 | 33.90 | a | 40.32 | 55.40 | 55.71 | 59.19 | 43.04 | e | 39.55 | b | 21.82 | b | 7.62 | b | 32.37 | |||||||
1985 | -1.52 | 2.04 | 23.97 | a | 37.00 | a | 46.74 | 49.00 | c | 55.23 | 53.84 | 48.00 | d | 34.53 | a | 16.90 | -6.17 | b | 29.96 | |||||||
1986 | 1.32 | c | 2.73 | b | 19.97 | b | 37.71 | b | 45.07 | b | 51.21 | a | 59.35 | 51.30 | a | 47.90 | a | 35.55 | b | 17.30 | c | 11.97 | 31.78 | |||
1987 | 8.28 | b | 15.19 | b | 24.57 | a | 33.95 | h | 45.46 | e | 54.83 | a | 60.53 | a | 55.03 | a | 45.83 | 29.48 | d | 27.64 | e | 16.79 | c | 34.88 | a | |
1988 | -4.69 | b | -4.32 | d | 19.04 | e | 29.68 | b | 45.13 | 52.73 | 57.74 | 57.33 | a | 44.03 | 27.27 | a | 25.30 | 5.11 | c | 29.53 | ||||||
1989 | 5.67 | a | -8.14 | 10.50 | a | 28.72 | a | 40.40 | a | 49.28 | a | 56.84 | 52.90 | b | 42.96 | b | 33.00 | b | 14.57 | -6.81 | 26.66 | |||||
1990 | 11.29 | 1.68 | 19.32 | 32.73 | 40.52 | 54.10 | 56.48 | 55.90 | 48.93 | 31.94 | 24.69 | a | 6.20 | a | 31.98 | |||||||||||
1991 | -2.13 | a | 7.37 | a | 19.71 | 35.23 | 49.52 | 57.41 | a | 57.30 | a | 56.68 | 44.00 | a | 32.87 | 16.17 | 8.94 | 31.92 | ||||||||
1992 | 8.66 | b | 14.97 | 17.26 | 31.23 | 43.42 | 49.30 | 51.57 | a | 51.10 | 43.24 | a | 32.42 | 23.80 | 10.16 | 31.43 | ||||||||||
1993 | -0.03 | 3.32 | 14.61 | 29.30 | 44.52 | 50.87 | 58.03 | 56.65 | 39.77 | 32.27 | a | 21.63 | 11.65 | 30.21 | ||||||||||||
1994 | -10.87 | a | -0.63 | a | 20.97 | a | 31.07 | a | 42.45 | 54.10 | a | 55.57 | a | 52.23 | 49.67 | 39.19 | 27.00 | 14.71 | 31.29 | |||||||
1995 | 5.61 | c | 2.64 | 21.32 | 27.73 | 42.61 | c | 56.40 | 58.00 | 61.96 | d | 44.30 | 36.93 | b | 14.13 | 4.40 | a | 31.34 | ||||||||
1996 | -5.07 | a | 2.24 | d | 9.54 | c | 27.77 | 41.43 | a | 55.32 | b | 55.47 | a | 55.73 | a | 47.77 | 34.94 | 15.70 | 8.10 | 29.08 | ||||||
1997 | 0.39 | c | 8.59 | a | 17.90 | 29.33 | 37.97 | a | 55.37 | 58.06 | 53.24 | b | 48.86 | b | 35.93 | a | 21.27 | 17.55 | 32.04 | |||||||
1998 | 11.10 | 21.89 | a | 21.47 | a | 36.00 | 48.50 | a | 53.17 | a | 57.26 | 56.80 | a | 49.12 | d | 38.26 | 28.27 | 17.23 | e | 36.59 | ||||||
1999 | 0.52 | 15.04 | b | 20.39 | 36.27 | 48.19 | 54.34 | a | 61.27 | a | 55.30 | a | 45.43 | 32.77 | 27.72 | a | 13.03 | 34.19 | ||||||||
2000 | 2.06 | 12.48 | 27.90 | a | 31.00 | a | 45.87 | a | 52.70 | 57.28 | b | 56.68 | 46.45 | a | 38.84 | 23.87 | -3.13 | 32.67 | ||||||||
2001 | 8.23 | 0.21 | 15.39 | 35.17 | 45.63 | a | 54.77 | 57.48 | 58.52 | 45.43 | 34.52 | 33.67 | 18.23 | 33.94 | ||||||||||||
2002 | 13.94 | 14.86 | 12.65 | 32.31 | a | 38.61 | 55.64 | b | 61.97 | 56.00 | 49.82 | b | 32.37 | a | 22.80 | 14.63 | a | 33.80 | ||||||||
2003 | 0.79 | b | 0.43 | 18.23 | 31.00 | 42.63 | a | 52.38 | a | 57.29 | 58.16 | 48.34 | a | 35.00 | a | 23.18 | b | 15.86 | b | 31.94 | ||||||
2004 | -0.32 | 10.22 | f | 22.34 | b | 33.07 | b | 41.07 | c | 50.48 | c | 56.94 | 50.16 | f | 51.54 | f | 38.36 | i | 26.87 | g | 8.46 | g | 33.93 | f | ||
2005 | 3.93 | b | 14.07 | a | 15.50 | e | 34.75 | f | 44.11 | d | 58.79 | a | 60.13 | a | 56.68 | 50.87 | 37.38 | j | 25.05 | k | 11.21 | b | 35.03 | c | ||
2006 | 20.00 | a | 6.19 | a | 21.46 | e | 37.24 | a | 44.73 | a | 50.80 | 55.90 | a | 54.35 | 43.00 | 30.13 | 26.97 | 18.71 | 34.12 | |||||||
2007 | 8.71 | -0.96 | 21.97 | 31.53 | 46.13 | 52.57 | 55.45 | 54.90 | a | 46.90 | 41.65 | 22.63 | 3.90 | 32.11 | ||||||||||||
2008 | 2.81 | -1.33 | b | 9.90 | 31.73 | 38.90 | a | 52.00 | 55.45 | b | 50.76 | n | 48.03 | 33.58 | 21.61 | b | -2.54 | c | 26.38 | a | ||||||
2009 | -10.93 | a | 4.61 | 16.61 | 30.30 | 42.68 | 51.00 | 49.93 | d | 51.65 | 45.64 | b | 31.84 | 29.14 | a | 8.97 | 29.29 | |||||||||
2010 | 3.87 | 4.41 | a | 23.81 | 35.52 | a | 44.55 | 54.07 | 60.29 | 59.06 | 44.13 | 35.13 | 24.13 | 5.65 | 32.88 | |||||||||||
2011 | -2.48 | 2.29 | d | 13.13 | 31.10 | 43.58 | 53.30 | 61.06 | 55.94 | 45.43 | 37.42 | 26.83 | 13.39 | 31.75 | ||||||||||||
2012 | 6.29 | 13.93 | 34.62 | b | 33.40 | 46.81 | 54.10 | 60.06 | 51.65 | 41.67 | 32.10 | 23.53 | 14.23 | 34.37 | ||||||||||||
2013 | 3.00 | 2.93 | 8.77 | 27.23 | 44.03 | 54.57 | 58.63 | a | 53.68 | 47.53 | 35.61 | 19.83 | -1.77 | 29.50 | ||||||||||||
2014 | -9.06 | -10.93 | 6.17 | a | 28.23 | 44.19 | 56.87 | 55.26 | 55.90 | b | 45.57 | 34.07 | a | 15.00 | 15.90 | 28.10 | ||||||||||
2015 | 3.19 | -7.86 | 17.81 | 32.17 | 44.32 | 53.93 | 56.23 | 55.90 | 53.53 | 35.32 | 29.43 | 24.52 | 33.21 | |||||||||||||
2016 | 2.87 | 8.86 | 26.42 | 32.93 | 43.16 | 54.80 | 58.42 | 57.71 | 51.53 | 38.19 | 29.83 | 11.00 | a | 34.64 | ||||||||||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.44 | m | ----- | z |
2020 | 5.17 | g | 12.29 | v | 24.55 | i | 29.62 | d | 43.43 | c | 55.60 | e | 59.93 | a | 55.45 | b | 46.11 | b | 29.63 | d | 25.19 | d | 13.10 | k | 43.12 | d |
2021 | 12.79 | g | 4.89 | s | 25.70 | h | 35.83 | g | 44.52 | d | 57.18 | b | 57.59 | d | 56.50 | e | 47.42 | d | 43.00 | f | 21.14 | b | 13.17 | g | 47.39 | f |
2022 | 0.25 | s | -2.25 | l | 25.43 | q | 29.34 | a | 46.77 | e | 52.50 | j | 55.92 | e | 55.68 | c | 47.17 | a | 33.70 | h | 25.12 | d | 9.21 | b | 38.46 | e |
2023 | 15.50 | k | 8.04 | e | 15.21 | c | 31.43 | g | 45.45 | k | 52.67 | c | 53.59 | b | 53.80 | a | 50.36 | b | 39.13 | a | 21.57 | b | 22.54 | g | 36.80 | d |
2024 | 15.06 | 17.38 | 19.83 | a | 32.09 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.43 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.32 | 3.72 | 16.58 | 31.68 | 42.89 | 52.37 | 56.50 | 54.47 | 45.57 | 34.90 | 22.46 | 7.83 | 30.60 | |||||||||||||
S.D. | 7.08 | 7.17 | 5.85 | 2.86 | 3.27 | 2.87 | 2.70 | 3.22 | 3.04 | 3.67 | 4.53 | 6.99 | 2.26 | |||||||||||||
SKEW | 0.04 | 0.49 | 0.40 | 0.13 | -0.33 | -0.13 | -0.21 | -0.17 | -0.14 | 0.13 | -0.51 | -0.34 | 0.11 | |||||||||||||
MAX | 20.00 | 21.89 | 34.62 | 37.97 | 49.52 | 58.79 | 61.97 | 62.07 | 53.53 | 44.48 | 33.67 | 24.52 | 36.59 | |||||||||||||
MIN | -17.35 | -10.93 | 3.13 | 25.67 | 33.29 | 46.03 | 49.93 | 46.42 | 37.90 | 26.39 | 10.80 | -8.06 | 25.92 | |||||||||||||
YRS | 71 | 71 | 72 | 70 | 72 | 73 | 74 | 73 | 74 | 71 | 73 | 71 | 65 |