YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.07 | p | 49.19 | 40.87 | 25.65 | 22.73 | -1.90 | b | 27.31 | g | ||||
1949 | -10.90 | -10.00 | 13.23 | 28.83 | 41.87 | a | 47.50 | 52.93 | a | 51.84 | 35.53 | 31.71 | 24.13 | -1.45 | 25.43 | |||||||||||
1950 | -18.61 | 2.79 | 12.68 | 25.53 | 37.13 | 45.40 | 47.53 | a | 49.29 | 41.96 | c | 32.20 | a | 14.07 | 5.39 | 24.61 | ||||||||||
1951 | -4.26 | 5.36 | 4.63 | a | 23.90 | 37.29 | 43.73 | 52.79 | b | 50.55 | 40.10 | 29.67 | a | 13.60 | -5.19 | 24.35 | ||||||||||
1952 | -5.90 | b | 9.14 | 9.68 | 30.03 | 39.42 | 50.63 | 51.48 | b | 51.47 | a | 41.44 | c | 26.35 | 15.90 | 5.43 | a | 27.09 | ||||||||
1953 | 10.39 | 12.69 | b | 18.29 | 25.43 | 39.23 | a | 52.40 | 54.43 | a | 54.33 | a | 40.33 | 31.58 | 24.97 | 14.16 | 31.52 | |||||||||
1954 | -6.52 | 25.07 | 11.60 | a | 27.07 | a | 37.69 | b | 47.61 | b | 58.14 | b | 52.35 | 42.73 | 29.71 | 23.43 | 11.39 | c | 30.02 | |||||||
1955 | 3.03 | a | -0.46 | 11.84 | 31.60 | 41.71 | 48.40 | 56.06 | 53.45 | b | 37.46 | d | 26.57 | c | 5.20 | -0.63 | a | 26.19 | ||||||||
1956 | -1.42 | 1.55 | 17.19 | 20.80 | 39.93 | a | 51.91 | h | 51.60 | a | 48.85 | e | 37.33 | 28.00 | 20.37 | 10.54 | c | 24.98 | a | |||||||
1957 | -9.74 | 3.89 | 18.39 | 26.57 | 39.19 | 47.87 | 58.00 | 55.94 | 40.17 | 32.07 | b | 21.97 | 16.10 | 29.20 | ||||||||||||
1958 | 10.81 | 3.86 | 14.21 | g | 29.86 | a | 40.48 | 45.03 | 49.63 | a | 51.73 | a | 37.76 | a | 26.35 | 17.00 | a | 4.68 | 28.84 | a | ||||||
1959 | -3.77 | a | -9.57 | 21.81 | 25.75 | b | 35.36 | c | 50.57 | b | 50.16 | 51.00 | 42.86 | b | 26.82 | c | 11.83 | f | 15.75 | c | 27.89 | a | ||||
1960 | -2.00 | a | 1.72 | 8.59 | b | 28.43 | b | 37.62 | b | 47.00 | c | 52.18 | c | 47.83 | b | 37.82 | b | 24.94 | 9.27 | 4.87 | 24.86 | |||||
1961 | 6.73 | a | 8.46 | 21.84 | 21.23 | 38.65 | 46.60 | 51.52 | 50.90 | 33.40 | 24.32 | 12.63 | -5.77 | a | 25.88 | |||||||||||
1962 | -1.35 | 1.04 | 8.68 | 27.57 | 43.52 | 49.17 | 51.52 | 50.06 | 37.83 | 33.00 | 22.00 | 8.55 | 27.63 | |||||||||||||
1963 | -8.81 | 10.64 | 22.26 | 29.10 | 39.32 | 52.60 | 56.32 | 50.94 | 45.03 | 33.81 | 14.23 | 1.23 | a | 28.89 | ||||||||||||
1964 | 6.90 | 12.38 | 9.68 | 28.00 | 42.52 | 48.23 | 55.48 | 48.90 | 36.93 | 27.16 | 8.63 | -4.19 | 26.72 | |||||||||||||
1965 | -2.16 | 3.96 | 4.74 | 30.63 | 40.10 | 52.10 | 56.13 | 52.32 | 33.97 | 30.84 | 17.57 | 14.42 | 27.88 | |||||||||||||
1966 | -9.00 | 2.25 | 18.26 | 25.53 | 39.19 | 48.10 | 58.23 | 50.29 | 46.17 | 30.77 | 13.43 | 10.90 | 27.84 | |||||||||||||
1967 | 6.53 | a | 8.50 | 18.03 | 28.73 | 36.19 | 48.77 | 50.29 | 50.23 | 44.10 | 33.23 | 18.87 | 4.13 | 28.97 | ||||||||||||
1968 | 1.52 | 7.69 | 22.00 | 25.43 | 34.74 | 48.80 | 49.84 | 51.19 | 42.90 | 28.42 | 24.40 | 0.32 | 28.10 | |||||||||||||
1969 | -10.77 | 5.07 | 12.45 | 34.93 | a | 39.68 | 45.33 | 55.10 | 54.29 | 42.80 | 28.87 | 19.37 | 11.10 | 28.18 | ||||||||||||
1970 | -0.87 | 8.29 | 13.94 | 29.57 | 41.61 | 50.90 | a | 56.48 | 53.97 | 40.77 | 27.29 | 19.07 | 5.68 | 28.89 | ||||||||||||
1971 | -2.19 | 7.79 | 18.45 | 32.24 | a | 39.10 | 53.86 | b | 49.83 | a | 55.94 | 42.66 | a | 30.92 | g | 21.42 | d | 1.88 | f | 31.91 | b | |||||
1972 | ----- | z | 3.44 | k | 16.56 | m | 30.67 | 43.26 | 51.43 | 50.23 | 54.35 | 40.33 | 28.39 | 20.77 | 1.42 | 35.65 | c | |||||||||
1973 | 7.68 | 12.75 | 24.32 | 29.23 | 38.42 | 50.43 | 51.90 | 54.52 | 41.97 | 33.06 | 14.68 | b | 5.67 | m | 32.63 | a | ||||||||||
1974 | 0.84 | 12.61 | 19.90 | 30.87 | 40.19 | 47.10 | 57.68 | 46.23 | 36.53 | 29.55 | 19.80 | 13.33 | a | 29.55 | ||||||||||||
1975 | 7.26 | 5.11 | 9.97 | 27.40 | 40.97 | 47.77 | 57.48 | 49.46 | c | ----- | z | 31.19 | 16.50 | 7.83 | a | 27.36 | a | |||||||||
1976 | 4.00 | b | 20.00 | 16.71 | 33.13 | 37.68 | 52.77 | 56.29 | 54.87 | 41.52 | a | 26.38 | b | 10.63 | 7.35 | 30.11 | ||||||||||
1977 | -9.48 | 17.57 | 20.97 | 30.87 | 47.35 | 52.43 | 55.41 | b | 47.16 | 44.60 | 33.48 | b | 14.20 | 4.32 | 29.91 | |||||||||||
1978 | -10.58 | -0.74 | a | 20.42 | 33.63 | 43.61 | 51.47 | 54.48 | 50.52 | 43.73 | 31.84 | 11.79 | a | 1.29 | 27.62 | |||||||||||
1979 | -10.39 | c | -6.29 | 16.74 | 27.64 | b | 37.48 | b | 48.40 | 56.48 | 52.74 | 43.67 | c | 33.83 | a | 15.93 | c | 12.79 | b | 27.42 | ||||||
1980 | 1.61 | 11.31 | 16.30 | a | 29.30 | 42.50 | a | 50.90 | 56.10 | 51.03 | 43.03 | a | 33.63 | a | 25.14 | b | 10.58 | 30.95 | ||||||||
1981 | 15.72 | b | 13.50 | 21.00 | 32.79 | b | 44.13 | 48.41 | a | 58.00 | b | 55.13 | 41.93 | b | 32.19 | 22.63 | 9.81 | 32.94 | ||||||||
1982 | -13.72 | b | 3.04 | 17.65 | 27.90 | 38.00 | b | 48.13 | 55.55 | 53.48 | 40.83 | 32.84 | 14.87 | 12.23 | 27.57 | |||||||||||
1983 | 18.58 | 20.89 | 24.26 | 26.50 | 37.23 | 48.67 | 58.52 | 60.00 | 41.50 | 33.00 | b | 23.33 | -9.23 | a | 31.94 | |||||||||||
1984 | 11.29 | 20.10 | 19.10 | 30.00 | 36.71 | 50.97 | 56.29 | 59.10 | 37.90 | 31.23 | 17.90 | -0.30 | a | 30.86 | ||||||||||||
1985 | 3.00 | 5.07 | 19.74 | 33.07 | a | 45.10 | 46.33 | 56.52 | 52.45 | 43.07 | 32.83 | a | 6.83 | 3.71 | 28.98 | |||||||||||
1986 | 17.10 | a | 8.54 | 27.73 | a | 30.57 | 40.87 | 55.31 | a | 54.63 | a | 51.57 | a | 42.76 | a | 33.23 | 17.60 | 16.87 | 33.06 | |||||||
1987 | 13.84 | 21.11 | 24.06 | 35.03 | 46.48 | 53.17 | 58.03 | 52.61 | 42.70 | 30.48 | 24.33 | 13.58 | 34.62 | |||||||||||||
1988 | -1.19 | 5.24 | 22.13 | 27.45 | a | 45.23 | 61.57 | 57.47 | a | 54.32 | 41.57 | 31.10 | 20.07 | 11.97 | b | 31.41 | ||||||||||
1989 | 8.80 | a | -3.00 | 17.45 | 31.90 | 42.48 | 48.77 | 60.94 | 54.97 | 40.57 | 31.26 | 23.67 | 3.29 | 30.09 | ||||||||||||
1990 | 16.87 | 14.54 | 22.19 | 29.14 | a | 41.58 | 51.60 | 55.76 | b | 57.55 | 45.97 | 30.74 | 22.10 | -0.43 | a | 32.30 | ||||||||||
1991 | 1.94 | 21.32 | 21.61 | 33.77 | 45.87 | 54.93 | 55.03 | b | 57.23 | a | 44.55 | a | 27.55 | 18.17 | 13.65 | 32.97 | ||||||||||
1992 | 14.83 | a | 19.79 | 24.65 | 30.57 | 43.23 | 51.50 | 51.29 | 48.48 | 42.80 | 30.57 | a | 23.47 | 5.77 | 32.25 | |||||||||||
1993 | -0.29 | 1.07 | 24.16 | 31.10 | 41.84 | 48.50 | 52.81 | 52.03 | 39.33 | 27.84 | 16.97 | 18.03 | 29.45 | |||||||||||||
1994 | -0.63 | a | -0.54 | 24.26 | 31.23 | 43.94 | 52.77 | 52.55 | 53.94 | 45.10 | 37.06 | 20.43 | 14.13 | 31.19 | ||||||||||||
1995 | 8.20 | a | 14.93 | 16.43 | a | 27.57 | 37.45 | b | 51.28 | a | 55.94 | 55.55 | 38.30 | 32.14 | c | 19.03 | 6.96 | d | 30.31 | |||||||
1996 | -2.74 | 12.79 | 9.10 | 29.00 | 40.23 | 50.62 | a | 52.30 | a | 53.90 | a | 43.70 | 31.16 | 11.53 | 1.68 | 27.77 | ||||||||||
1997 | -1.70 | a | 16.93 | 18.29 | 26.90 | 38.90 | 51.07 | a | 56.38 | b | 50.73 | a | 44.03 | a | 31.23 | 16.52 | a | 15.61 | 30.41 | |||||||
1998 | 6.74 | 23.11 | 13.68 | 32.00 | 40.20 | a | 40.52 | e | 55.35 | 57.61 | 47.37 | 33.42 | 27.23 | 11.68 | 32.41 | |||||||||||
1999 | 4.87 | 20.54 | 24.94 | 31.46 | b | 43.11 | c | 48.87 | 56.07 | b | 55.33 | a | 37.10 | 29.70 | a | 26.30 | 13.10 | a | 32.62 | |||||||
2000 | 9.13 | 13.83 | 22.07 | b | 27.96 | c | 40.23 | 46.00 | b | 57.16 | f | 55.64 | i | 40.42 | k | 33.76 | j | 9.08 | q | -1.86 | q | 26.54 | f | |||
2001 | 12.09 | i | -1.46 | o | 20.74 | l | 31.10 | j | 39.79 | b | 47.71 | f | 57.74 | h | 56.26 | h | 46.47 | k | ----- | z | ----- | z | 9.00 | o | 39.79 | k |
2002 | 11.52 | h | 15.68 | i | 5.50 | k | 25.55 | j | 37.62 | j | 52.68 | b | 60.00 | f | 55.28 | m | 46.33 | f | 25.35 | 22.92 | e | 13.00 | 28.49 | h | ||
2003 | 1.50 | c | -2.37 | a | 16.13 | a | 36.20 | 42.19 | 50.76 | a | 59.30 | a | 60.00 | a | 45.07 | 38.58 | 16.10 | 17.26 | 31.73 | |||||||
2004 | 4.33 | a | 13.86 | ----- | z | 33.10 | 40.77 | ----- | z | 57.65 | 51.07 | b | 48.63 | 35.47 | a | 21.33 | 17.30 | a | 32.35 | b | ||||||
2005 | 3.21 | b | 17.32 | 24.58 | 35.27 | ----- | z | 54.37 | 58.26 | 51.77 | 44.40 | 34.61 | 26.97 | 15.10 | 33.26 | a | ||||||||||
2006 | 25.13 | ----- | z | 23.42 | s | 36.30 | 43.00 | 53.17 | 57.27 | t | 54.60 | a | 41.33 | 27.71 | 18.23 | 9.21 | c | 34.30 | c | |||||||
2007 | 6.40 | a | 4.36 | 24.97 | 28.77 | 43.32 | 52.30 | 60.65 | 53.55 | 42.20 | 31.94 | 18.20 | 1.52 | b | 30.68 | |||||||||||
2008 | -1.93 | a | 2.14 | 17.17 | a | 26.48 | a | 40.47 | a | 49.52 | a | 55.60 | a | 55.13 | 39.46 | b | 28.65 | 21.59 | a | -1.10 | 27.76 | |||||
2009 | -0.65 | 7.85 | a | 13.55 | 29.21 | a | 39.84 | 47.24 | a | 52.87 | 50.81 | 46.89 | b | 30.42 | 20.48 | a | -2.61 | 27.99 | ||||||||
2010 | 2.42 | 0.14 | 22.39 | 31.90 | 39.43 | a | 51.50 | 54.48 | 53.74 | 42.73 | 31.36 | c | 16.07 | 0.20 | a | 28.86 | ||||||||||
2011 | -0.06 | -2.89 | 13.77 | 29.17 | 40.84 | 50.55 | a | 58.68 | c | 54.00 | 40.93 | 32.03 | a | 14.04 | d | 12.00 | g | 30.10 | a | |||||||
2012 | 8.07 | a | 7.07 | 25.32 | 30.76 | a | 40.52 | b | 50.43 | 60.31 | b | 50.33 | a | ----- | z | 29.84 | 20.38 | a | 3.23 | a | 29.66 | a | ||||
2013 | 5.30 | a | 15.57 | 14.58 | 24.30 | 43.03 | b | 48.23 | 55.19 | d | 55.23 | i | 50.96 | e | 28.38 | r | 16.52 | a | -1.80 | a | 27.19 | b | ||||
2014 | 5.63 | a | -1.96 | 15.26 | 27.63 | 39.70 | d | 45.89 | b | 52.20 | a | 55.11 | d | 39.79 | a | 32.97 | 12.10 | a | 12.50 | a | 28.07 | |||||
2015 | 6.93 | a | 5.43 | 21.55 | 29.33 | 37.57 | a | 52.46 | f | 56.14 | c | 50.62 | e | 45.71 | b | 33.74 | 20.24 | a | 11.57 | c | 28.99 | a | ||||
2016 | 6.04 | c | 19.52 | b | 23.47 | a | 29.54 | b | 39.52 | 51.74 | k | 53.11 | v | 52.14 | q | 46.79 | f | 34.69 | e | 25.26 | c | 1.69 | b | 22.46 | d | |
2017 | 0.53 | a | 13.07 | 21.77 | 29.55 | a | 39.55 | b | 48.45 | a | 57.23 | e | 49.50 | i | 41.76 | m | 28.52 | b | 17.97 | a | 8.33 | a | 26.50 | b | ||
2018 | -0.39 | -7.32 | 16.71 | 24.27 | 42.85 | e | 51.36 | b | 55.73 | e | 51.80 | a | 41.07 | a | 24.55 | 18.14 | a | 14.30 | a | 27.75 | ||||||
2019 | 8.26 | -12.04 | 9.29 | 31.66 | a | 36.29 | 49.67 | 57.32 | 53.26 | 45.70 | 26.00 | 14.94 | l | 8.76 | f | 30.54 | b | |||||||||
2020 | 7.67 | a | 12.00 | 19.92 | g | 22.00 | h | 40.59 | b | 51.45 | a | 54.45 | 53.70 | a | 41.31 | d | 23.80 | a | 18.89 | b | 12.87 | a | 31.67 | b | ||
2021 | 13.04 | f | -9.40 | c | 20.97 | 24.93 | a | 38.97 | a | 50.90 | a | 59.76 | f | 51.86 | c | 41.38 | a | 33.73 | a | 21.56 | c | 5.72 | b | 28.06 | b | |
2022 | 6.43 | a | 6.37 | a | 18.84 | 25.35 | g | 38.04 | d | 48.00 | 57.17 | m | 55.30 | d | 44.07 | b | 38.79 | q | ----- | z | ----- | z | 31.01 | e | ||
2023 | ----- | z | ----- | z | ----- | z | 26.46 | b | 45.77 | 54.20 | ----- | z | ----- | z | 48.18 | m | 36.07 | d | 18.86 | h | 15.93 | c | 35.69 | g | ||
2024 | 2.34 | b | 13.84 | j | 17.21 | g | 32.29 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.34 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 2.34 | 7.66 | 17.89 | 29.30 | 40.52 | 49.90 | 55.03 | 52.76 | 41.78 | 30.57 | 18.48 | 7.26 | 29.29 | |||||||||||||
S.D. | 8.20 | 8.79 | 5.40 | 3.24 | 2.72 | 3.12 | 2.97 | 2.87 | 3.32 | 3.20 | 4.85 | 6.76 | 2.40 | |||||||||||||
SKEW | 0.04 | -0.14 | -0.52 | -0.12 | 0.32 | 0.30 | -0.34 | 0.31 | -0.11 | -0.13 | -0.48 | -0.31 | -0.02 | |||||||||||||
MAX | 25.13 | 25.07 | 27.73 | 36.30 | 47.35 | 61.57 | 60.94 | 60.00 | 50.96 | 38.58 | 27.23 | 18.03 | 34.62 | |||||||||||||
MIN | -18.61 | -12.04 | 4.63 | 20.80 | 34.74 | 40.52 | 47.53 | 46.23 | 33.40 | 23.80 | 5.20 | -9.23 | 24.35 | |||||||||||||
YRS | 71 | 70 | 67 | 71 | 73 | 70 | 67 | 69 | 68 | 71 | 70 | 69 | 51 |