YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 71.21 | q | 60.88 | 48.02 | 32.50 | 15.25 | a | 39.16 | h | |||
1961 | 11.44 | 23.61 | a | 34.43 | a | 37.97 | 53.94 | 67.80 | 68.69 | 71.23 | 55.55 | k | 48.08 | 31.35 | 12.87 | 41.95 | a | |||||||||
1962 | 6.61 | 10.80 | 25.93 | a | 41.00 | 59.44 | 65.23 | 67.27 | 69.45 | 55.15 | j | 49.40 | 35.25 | 18.24 | 40.79 | a | ||||||||||
1963 | 2.73 | 12.12 | 34.34 | 46.95 | 54.89 | 68.95 | 72.23 | 68.31 | 61.72 | 55.90 | 35.37 | 7.50 | a | 43.42 | ||||||||||||
1964 | 16.65 | 20.91 | 21.69 | 45.53 | 60.52 | 67.52 | 74.27 | 66.55 | 58.29 | a | 47.60 | 31.40 | 8.95 | 43.32 | ||||||||||||
1965 | 4.23 | 8.39 | 15.73 | 42.27 | 57.55 | 65.69 | a | 69.06 | 67.23 | 50.67 | 48.71 | 30.22 | 23.92 | 40.30 | ||||||||||||
1966 | -0.92 | a | 12.24 | a | 33.13 | 39.08 | 53.25 | a | 67.07 | 74.65 | a | 66.42 | 58.98 | 46.48 | 26.00 | 13.93 | a | 40.86 | ||||||||
1967 | 11.03 | 4.80 | 26.77 | 43.30 | 50.39 | 63.93 | 68.73 | a | 66.68 | 59.12 | 46.19 | 30.50 | 18.23 | 40.81 | ||||||||||||
1968 | 10.32 | 11.00 | 37.21 | 46.48 | 52.97 | 66.53 | 69.92 | 69.08 | 59.67 | 49.15 | 32.05 | 13.02 | 43.12 | |||||||||||||
1969 | 3.60 | 15.32 | 20.85 | 46.13 | 58.35 | 60.20 | 70.06 | 71.55 | 59.82 | 43.95 | 31.12 | 17.93 | a | 41.57 | ||||||||||||
1970 | 2.71 | 13.30 | 21.19 | 41.80 | 56.35 | 68.75 | 72.82 | 69.45 | 59.47 | 46.48 | 28.08 | 13.79 | 41.18 | |||||||||||||
1971 | 2.23 | 13.59 | 24.92 | 44.60 | a | 53.95 | 68.52 | 65.45 | a | 67.95 | 60.42 | 50.15 | 30.67 | 14.48 | 41.41 | |||||||||||
1972 | 3.15 | 7.41 | 24.97 | 40.72 | 60.02 | 65.85 | 68.58 | 68.94 | 56.97 | 43.27 | 29.55 | 7.39 | 39.73 | |||||||||||||
1973 | 13.94 | 18.09 | 36.82 | 43.70 | 55.10 | 66.70 | 69.98 | 70.42 | 56.97 | 52.06 | 30.83 | 13.50 | 44.01 | |||||||||||||
1974 | 8.42 | 13.73 | 25.44 | 45.00 | 52.47 | 65.65 | 74.79 | 65.42 | 55.53 | 49.35 | 31.64 | a | 21.44 | 42.41 | ||||||||||||
1975 | 11.15 | 12.30 | 19.90 | 35.67 | 59.60 | a | 65.38 | 73.94 | 68.82 | 55.35 | 49.89 | 32.23 | 15.26 | 41.62 | ||||||||||||
1976 | 6.90 | 23.03 | 27.92 | 50.20 | 56.68 | 69.80 | 73.21 | 71.97 | 61.02 | 42.34 | 24.35 | 9.00 | 43.03 | |||||||||||||
1977 | -2.65 | 20.36 | 34.98 | a | 51.75 | 65.81 | 67.50 | 73.13 | 65.52 | 59.55 | 47.21 | 29.63 | 10.63 | a | 43.62 | |||||||||||
1978 | 3.74 | 9.52 | 26.98 | 42.78 | 59.77 | 66.05 | 70.74 | 70.47 | 64.83 | 48.45 | 28.47 | 10.79 | 41.88 | |||||||||||||
1979 | -1.19 | 5.83 | a | 25.31 | 38.97 | 52.08 | 65.73 | 70.53 | a | 66.87 | 62.22 | 45.98 | 30.25 | 23.84 | 40.54 | |||||||||||
1980 | 11.27 | 13.36 | 23.40 | 48.78 | 61.21 | 65.72 | a | 72.68 | 68.89 | 59.07 | 43.95 | 35.18 | 17.50 | 43.42 | ||||||||||||
1981 | 16.82 | 21.48 | 36.45 | 48.22 | 56.63 | 65.45 | 71.56 | 68.88 | a | 59.00 | 46.05 | 36.85 | 14.35 | 45.15 | ||||||||||||
1982 | -1.88 | a | 13.17 | a | 24.87 | a | 42.42 | 60.53 | a | 61.79 | a | 72.79 | 69.45 | 59.02 | a | 47.98 | 26.63 | 21.62 | a | 41.53 | ||||||
1983 | 15.69 | 23.91 | 31.97 | 41.77 | 54.13 | a | 65.74 | a | 75.26 | 74.80 | a | 61.00 | a | 46.83 | a | 32.42 | -0.33 | a | 43.60 | |||||||
1984 | 10.79 | 26.67 | 24.53 | a | 45.64 | a | 56.22 | a | 67.10 | 70.97 | a | 72.41 | c | 54.15 | c | 49.26 | b | 32.00 | a | 13.94 | 43.64 | |||||
1985 | 8.42 | 12.95 | 33.98 | a | 46.54 | g | 61.15 | a | 61.75 | b | 70.09 | c | 63.58 | 56.00 | a | 43.83 | a | 18.55 | a | 2.80 | h | 43.03 | b | |||
1986 | 14.34 | 11.04 | a | 30.90 | a | 46.43 | 57.20 | a | 67.38 | a | 72.23 | a | 65.61 | 57.14 | a | 47.15 | a | 25.15 | 21.95 | 43.04 | ||||||
1987 | 19.97 | b | 29.39 | 36.06 | 53.25 | 62.05 | b | 70.00 | a | 74.52 | 67.48 | a | 60.91 | a | 43.58 | 35.77 | 21.68 | c | 47.89 | |||||||
1988 | 8.37 | e | 10.62 | 31.39 | 47.05 | a | 65.26 | b | 73.95 | 76.85 | 72.15 | 60.95 | 42.62 | c | 29.30 | 16.47 | a | 44.58 | ||||||||
1989 | 17.52 | a | 5.36 | 24.68 | a | 43.36 | a | 58.26 | 66.94 | c | 74.50 | 69.90 | 59.78 | 49.32 | 25.30 | 6.88 | b | 41.82 | ||||||||
1990 | 23.52 | 20.91 | 33.13 | 45.54 | c | 56.02 | c | 68.93 | a | 69.34 | 69.31 | 62.40 | a | 45.47 | 33.05 | a | 13.43 | b | 45.09 | |||||||
1991 | 9.42 | 22.59 | a | 30.28 | a | 45.89 | c | 62.67 | a | 71.88 | a | 72.11 | 71.68 | a | 58.44 | c | 45.53 | 22.29 | b | 18.05 | 44.24 | |||||
1992 | 18.05 | b | 25.16 | 32.79 | 41.43 | 60.28 | b | 65.02 | 64.37 | a | 64.26 | 58.19 | i | 45.37 | a | 28.16 | a | 17.73 | e | 42.05 | a | |||||
1993 | 11.74 | f | 16.29 | b | 29.12 | c | 44.24 | a | 57.72 | d | 64.10 | a | 69.11 | c | 69.75 | a | 54.36 | b | 45.78 | a | 28.46 | b | 18.12 | c | 45.19 | a |
1994 | -1.10 | g | 9.50 | c | 31.52 | d | 45.15 | c | 60.25 | a | 68.47 | a | 69.58 | e | 67.62 | b | 63.08 | e | 50.03 | 34.85 | d | 21.34 | 47.40 | a | ||
1995 | 13.46 | c | 15.02 | d | 31.82 | 40.20 | c | 55.46 | c | 71.31 | a | 71.83 | a | 72.90 | b | 59.09 | b | 46.17 | b | 25.39 | b | 15.33 | b | 43.17 | ||
1996 | 3.85 | e | 15.57 | g | 22.35 | a | 39.02 | c | 55.63 | d | 68.03 | a | 68.98 | b | 70.25 | c | 60.77 | b | 48.94 | e | 24.65 | c | 10.60 | a | 43.01 | a |
1997 | 6.12 | a | 18.04 | d | 26.20 | a | 41.50 | c | 53.76 | b | 70.23 | b | 70.72 | b | 68.52 | c | 62.96 | b | 48.43 | d | 26.72 | c | 25.65 | a | 43.24 | |
1998 | 15.11 | c | 30.78 | a | 30.06 | e | 49.83 | c | 63.98 | b | 65.90 | a | 72.79 | 72.35 | d | 65.48 | c | 49.95 | c | 34.05 | 23.13 | a | 47.78 | |||
1999 | 9.40 | b | 26.62 | c | 32.36 | b | 46.00 | b | 59.04 | f | 67.36 | b | 74.50 | b | 69.30 | d | 59.38 | d | 47.86 | c | 38.93 | 24.00 | b | 45.06 | a | |
2000 | 13.62 | b | 24.11 | a | 39.17 | a | 44.18 | b | 59.73 | e | 63.53 | a | 71.66 | b | 70.32 | c | 59.37 | 51.78 | a | 28.54 | b | 3.92 | a | 44.16 | ||
2001 | 17.95 | a | 6.90 | c | 25.47 | 44.59 | c | 58.76 | b | 67.70 | c | 73.07 | b | 70.35 | a | 57.73 | d | 42.98 | e | 38.54 | g | 21.46 | d | 44.27 | a | |
2002 | 22.08 | f | 23.24 | e | 17.83 | h | 38.02 | h | 49.11 | i | 67.87 | g | 72.98 | h | 69.33 | k | 63.06 | e | 37.00 | j | 29.23 | d | 22.17 | h | 38.51 | i |
2003 | 11.25 | m | 11.65 | e | 25.39 | h | 42.93 | i | 54.58 | e | 65.25 | f | 69.13 | d | 70.50 | d | 56.25 | f | 47.07 | j | 27.03 | k | 20.00 | h | 51.46 | h |
2004 | 5.74 | n | 14.53 | i | 32.31 | j | ----- | z | 51.75 | g | 61.58 | f | 65.96 | f | 60.89 | h | 61.50 | e | 46.57 | b | 34.36 | a | ----- | z | 47.48 | i |
2005 | 6.78 | o | 21.27 | h | ----- | z | ----- | z | 53.47 | 68.50 | b | 73.20 | f | 65.55 | c | 62.05 | i | 47.83 | g | 33.33 | f | 16.67 | a | 51.05 | h | |
2006 | ----- | z | 14.08 | i | 31.13 | h | 48.80 | h | 57.81 | b | 66.09 | b | 73.97 | 68.52 | b | 54.92 | 40.20 | c | 31.14 | a | 23.75 | k | 56.09 | e | ||
2007 | 14.62 | e | 7.12 | g | 31.53 | 42.17 | a | 59.95 | a | 68.95 | 72.45 | 67.66 | 60.42 | 49.85 | 30.62 | 10.63 | 46.26 | a | ||||||||
2008 | 6.95 | 9.53 | 22.55 | 40.00 | 52.48 | 64.10 | 69.16 | 66.81 | 58.93 | 45.21 | 31.27 | 8.23 | 39.60 | |||||||||||||
2009 | -1.22 | a | 13.55 | 24.34 | 42.25 | 52.69 | 62.83 | 65.58 | 64.92 | 61.62 | 40.05 | 37.92 | 13.60 | 39.84 | ||||||||||||
2010 | 8.77 | 12.11 | 35.45 | 50.80 | 56.53 | 64.53 | 69.29 | 70.28 | a | 55.52 | 48.81 | 30.73 | 11.73 | 42.88 | ||||||||||||
2011 | 5.94 | 12.04 | 22.02 | 41.78 | 54.94 | 63.88 | 74.34 | 69.68 | 58.25 | 49.98 | 32.41 | a | ----- | z | 44.11 | a | ||||||||||
2012 | 21.33 | y | 22.55 | a | 42.31 | 46.28 | a | 59.87 | 67.86 | a | 75.63 | 67.11 | 57.83 | 43.32 | 31.60 | 16.84 | 48.29 | a | ||||||||
2013 | 11.53 | 12.02 | 19.31 | 33.25 | 54.00 | 64.72 | 70.79 | 69.45 | 61.85 | 44.82 | 28.57 | b | 6.60 | a | 39.74 | |||||||||||
2014 | 1.40 | a | 2.50 | 19.65 | a | 38.05 | 54.47 | 66.57 | 67.42 | 68.79 | 58.22 | 45.66 | 20.58 | 20.15 | 38.62 | |||||||||||
2015 | 14.81 | 6.93 | 29.66 | 44.20 | 55.00 | 65.85 | 69.66 | 66.68 | 64.97 | 49.86 | i | ----- | z | ----- | z | 46.42 | c | |||||||||
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.75 | b | 47.87 | a | 40.33 | 15.56 | 41.13 | h | ||
2017 | 13.77 | 24.66 | 28.40 | 45.58 | 54.58 | 66.13 | 70.32 | 64.74 | 61.42 | 47.63 | 27.98 | 14.79 | 43.33 | |||||||||||||
2018 | 10.73 | 7.59 | 27.57 | a | 31.55 | a | 62.98 | 68.32 | 70.58 | 69.11 | h | 59.42 | e | 41.56 | 23.33 | 21.27 | 38.63 | a | ||||||||
2019 | 5.89 | 3.04 | 22.24 | 41.47 | a | 51.18 | 66.70 | 71.84 | 66.63 | 61.45 | 43.42 | 27.35 | 16.92 | 39.84 | ||||||||||||
2020 | 13.95 | 14.09 | 31.42 | 40.33 | 54.63 | 68.98 | 71.97 | 69.24 | 56.89 | b | 39.77 | 34.93 | 22.06 | 43.19 | ||||||||||||
2021 | 17.97 | 6.48 | 36.18 | 42.53 | 56.23 | 71.68 | 72.68 | 70.32 | 61.97 | 52.26 | 33.77 | 19.94 | 45.17 | |||||||||||||
2022 | 4.52 | 7.25 | 26.79 | 37.79 | a | 58.24 | 68.12 | 71.90 | 69.00 | u | ----- | z | ----- | z | ----- | z | ----- | z | 39.23 | e | ||||||
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.71 | p | 30.98 | 30.98 | k | |
2024 | 16.02 | 29.47 | 32.00 | 45.18 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.83 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 9.47 | 15.07 | 28.64 | 43.39 | 57.13 | 66.81 | 71.28 | 68.75 | 59.48 | 46.80 | 30.34 | 15.76 | 42.62 | |||||||||||||
S.D. | 6.25 | 7.34 | 5.75 | 4.27 | 3.58 | 2.56 | 2.62 | 2.36 | 2.83 | 3.21 | 4.35 | 5.95 | 2.08 | |||||||||||||
SKEW | -0.08 | 0.40 | 0.05 | -0.24 | 0.39 | 0.10 | -0.34 | -0.00 | -0.46 | -0.03 | -0.26 | -0.16 | 0.37 | |||||||||||||
MAX | 23.52 | 30.78 | 42.31 | 53.25 | 65.81 | 73.95 | 76.85 | 74.80 | 65.48 | 55.90 | 40.33 | 30.98 | 47.89 | |||||||||||||
MIN | -2.65 | 2.50 | 15.73 | 31.55 | 50.39 | 60.20 | 64.37 | 63.58 | 50.67 | 39.77 | 18.55 | -0.33 | 38.62 | |||||||||||||
YRS | 54 | 57 | 57 | 55 | 58 | 58 | 58 | 57 | 57 | 58 | 58 | 56 | 41 |