YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.25 | w | 73.78 | f | 60.52 | 40.35 | a | 21.66 | a | 26.26 | 37.19 | h | ||
1960 | 10.05 | b | 14.05 | a | 17.39 | 43.33 | 56.73 | 63.68 | 72.19 | d | 70.88 | a | 60.02 | 48.57 | b | 30.80 | 12.52 | 41.68 | ||||||||
1961 | 8.74 | 20.82 | f | 34.65 | 37.37 | 53.45 | 68.24 | a | 69.76 | d | 72.92 | 57.67 | 48.45 | 29.92 | 11.16 | 44.76 | a | |||||||||
1962 | 3.90 | 7.96 | 24.37 | 40.20 | 56.66 | 65.62 | 68.41 | d | 70.11 | 56.20 | 49.73 | a | 35.97 | 17.05 | 41.35 | |||||||||||
1963 | 2.17 | a | 10.48 | a | 32.73 | 45.68 | 54.60 | 68.50 | e | 71.87 | 69.95 | 62.13 | 57.93 | a | 34.62 | 6.81 | 43.12 | |||||||||
1964 | 15.71 | 19.66 | 20.50 | 45.38 | 60.53 | 66.81 | a | 73.52 | 66.87 | 56.27 | 46.95 | 29.79 | a | 6.00 | b | 42.33 | ||||||||||
1965 | -1.15 | d | 7.54 | 15.39 | 41.72 | 55.70 | h | 64.87 | 69.24 | 68.11 | c | 49.52 | b | 49.02 | 28.93 | a | 21.29 | c | 37.68 | a | ||||||
1966 | 1.86 | x | 10.67 | j | 30.98 | f | 37.88 | b | 53.40 | 66.72 | 73.82 | 66.27 | 59.73 | 46.39 | 24.72 | 15.19 | g | 53.62 | d | |||||||
1967 | 9.55 | 6.71 | 26.80 | a | 41.90 | 50.65 | 64.24 | a | 68.76 | 67.13 | 60.98 | 45.45 | 28.48 | 17.86 | b | 40.71 | ||||||||||
1968 | 7.18 | a | 9.90 | 36.65 | a | 45.67 | 52.37 | a | 65.76 | a | 70.29 | 69.58 | 59.52 | 47.55 | a | 31.31 | a | 11.14 | b | 42.24 | ||||||
1969 | -0.38 | a | 15.04 | 18.26 | 45.70 | 57.71 | 58.58 | 70.13 | a | 74.35 | a | 61.57 | 42.73 | 31.03 | 17.05 | 40.98 | ||||||||||
1970 | 0.87 | 12.59 | 20.02 | 41.18 | 54.94 | 69.48 | 73.50 | 71.73 | 61.58 | 47.13 | 27.14 | a | 11.61 | 40.98 | ||||||||||||
1971 | 0.24 | 12.38 | 26.03 | 45.08 | 54.73 | 69.08 | 66.67 | a | 69.73 | 61.08 | 49.18 | 28.93 | 13.21 | 41.36 | ||||||||||||
1972 | 0.98 | 4.78 | 24.08 | 40.92 | 59.79 | 66.57 | 67.98 | 69.42 | 57.64 | a | 44.40 | 26.30 | 3.52 | 38.86 | ||||||||||||
1973 | 12.71 | 17.62 | 37.05 | 43.85 | 55.53 | 67.58 | 69.93 | a | 73.40 | 57.45 | 53.18 | a | 27.17 | 13.05 | 44.04 | |||||||||||
1974 | 3.78 | b | 13.16 | 23.90 | 43.42 | 52.16 | 66.48 | 74.68 | 67.02 | 55.47 | 49.31 | 31.18 | 21.60 | 41.85 | ||||||||||||
1975 | 10.95 | 11.29 | 18.67 | a | 36.64 | b | 58.82 | 67.10 | 74.48 | 69.06 | 56.78 | 50.55 | 33.00 | a | 15.73 | 41.92 | ||||||||||
1976 | 7.59 | b | 23.48 | 26.29 | 50.15 | 58.14 | b | 70.85 | 74.60 | 75.11 | 62.05 | 46.27 | g | 24.13 | 7.92 | 43.66 | a | |||||||||
1977 | -4.18 | 17.54 | 30.66 | o | 52.23 | 67.56 | 67.00 | 72.48 | 63.85 | 59.13 | 47.50 | 24.07 | a | 8.44 | 43.24 | a | ||||||||||
1978 | -2.10 | 4.88 | 25.96 | c | 42.78 | 60.24 | 65.43 | a | 70.27 | 70.37 | 64.98 | 48.11 | 25.15 | 9.45 | 40.46 | |||||||||||
1979 | -4.47 | a | 0.21 | 21.80 | a | 36.98 | c | 50.40 | 66.82 | 70.84 | 66.66 | 63.48 | 44.97 | a | 26.23 | 24.77 | 39.06 | |||||||||
1980 | 6.61 | 10.36 | a | 20.44 | 50.05 | 62.48 | a | 67.00 | 72.10 | 67.94 | 59.17 | 44.06 | 33.66 | b | 12.02 | 42.16 | ||||||||||
1981 | 13.45 | 19.43 | 35.77 | 48.52 | 57.21 | b | 63.42 | d | 71.83 | b | 69.69 | 58.50 | 44.32 | 36.93 | a | 12.08 | 44.26 | |||||||||
1982 | -5.07 | b | 12.20 | a | 25.97 | a | 41.43 | a | 60.09 | c | 62.03 | 72.58 | a | 69.77 | a | 58.29 | a | 46.57 | d | 24.44 | c | 20.93 | a | 40.77 | ||
1983 | 17.10 | 23.56 | a | 31.55 | b | 41.91 | b | 55.17 | a | 66.39 | b | 74.93 | a | 75.16 | 60.76 | a | 46.26 | b | 31.50 | b | 0.17 | a | 43.70 | |||
1984 | 8.78 | a | 26.66 | a | ----- | z | 48.65 | c | 55.56 | 65.95 | b | 71.24 | 72.82 | a | 54.43 | a | 48.40 | b | 31.40 | d | 9.28 | b | 44.83 | a | ||
1985 | 5.58 | a | 11.02 | b | 33.65 | 47.93 | c | 59.03 | a | 60.91 | b | 69.72 | a | 64.85 | a | 55.34 | a | ----- | z | 17.48 | b | 3.29 | e | 38.98 | a | |
1986 | 12.59 | b | 10.64 | c | 31.10 | a | 44.57 | 58.83 | b | 67.43 | a | 71.74 | b | 65.00 | a | 54.69 | c | 45.18 | c | 23.07 | b | 22.90 | f | 44.08 | a | |
1987 | 17.55 | b | 27.73 | d | 32.61 | c | 52.38 | d | 62.02 | b | 68.00 | a | 73.57 | b | 65.94 | d | 60.18 | b | 40.33 | d | 33.35 | f | ----- | z | 50.03 | b |
1988 | 5.82 | f | 8.52 | a | ----- | z | 44.71 | b | 64.39 | c | 74.09 | b | 75.03 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.35 | g |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.33 | y | 24.05 | a | 5.87 | 14.96 | j | |
1990 | 22.92 | 19.45 | 32.61 | 44.52 | 54.95 | 66.40 | 69.69 | 70.18 | 62.53 | 46.57 | a | 33.93 | a | 12.60 | 44.70 | |||||||||||
1991 | 6.89 | 21.62 | 30.84 | 47.74 | a | 60.97 | a | 69.97 | 69.95 | 71.58 | 58.08 | 43.56 | 22.22 | 17.97 | 43.45 | |||||||||||
1992 | 17.79 | 24.22 | 33.06 | 41.97 | 59.80 | a | 62.57 | 63.68 | 64.23 | 57.93 | a | 45.68 | 25.83 | 11.60 | 42.36 | |||||||||||
1993 | 6.95 | a | 9.43 | 24.35 | 43.03 | 56.21 | 62.03 | a | 66.50 | 67.71 | 54.72 | 44.60 | 25.75 | 15.19 | 39.71 | |||||||||||
1994 | -4.79 | 5.45 | 29.13 | 44.17 | 59.57 | a | 67.60 | 67.42 | a | 66.68 | 62.23 | 49.84 | 34.28 | 20.60 | 41.85 | |||||||||||
1995 | 10.29 | 12.43 | 28.79 | 38.72 | 55.40 | 70.68 | 69.50 | 72.19 | 58.62 | 44.18 | 22.18 | 12.81 | 41.32 | |||||||||||||
1996 | 0.68 | 12.07 | 17.97 | a | 38.65 | 53.68 | 68.43 | 68.53 | 70.74 | 59.50 | 47.08 | 18.45 | 6.53 | a | 38.53 | |||||||||||
1997 | 2.13 | 13.52 | 21.84 | 39.13 | 53.58 | 69.48 | a | 69.69 | 67.94 | 62.47 | 48.53 | 24.08 | 24.00 | 41.37 | ||||||||||||
1998 | 12.18 | 28.71 | 27.31 | 49.53 | 61.94 | 63.38 | 71.00 | 71.97 | a | 65.45 | 48.57 | a | 31.92 | 19.66 | 45.97 | |||||||||||
1999 | 7.82 | 23.48 | 32.95 | 46.22 | 58.29 | 66.03 | 72.47 | 69.31 | 56.78 | 45.03 | 39.07 | 22.66 | 45.01 | |||||||||||||
2000 | 11.11 | 22.40 | 35.83 | b | 42.27 | b | 56.94 | ----- | z | 69.11 | d | 68.29 | g | 57.54 | b | 48.00 | c | 27.04 | g | 0.98 | i | 42.90 | d | |||
2001 | 17.41 | h | 3.23 | h | 21.64 | b | 42.72 | e | 56.93 | c | 65.72 | a | 71.68 | 71.12 | b | 58.28 | a | 43.77 | 42.24 | e | 20.88 | e | 49.50 | b | ||
2002 | 15.72 | f | 23.48 | f | 19.07 | d | 39.69 | d | 49.74 | d | 68.29 | b | 73.52 | d | 68.07 | c | 62.21 | a | 36.61 | d | 28.92 | d | 20.44 | e | 46.66 | b |
2003 | 7.20 | d | 8.76 | g | 27.80 | c | 46.04 | b | 56.44 | e | 65.80 | b | 70.03 | a | 72.77 | a | 58.07 | b | ----- | z | 25.89 | c | 19.75 | e | 44.98 | b |
2004 | 6.85 | g | 14.21 | e | 31.40 | e | 43.50 | 52.52 | f | 60.59 | c | 68.71 | c | 62.76 | d | 61.89 | c | 45.75 | a | 33.21 | a | 17.63 | a | 43.97 | b | |
2005 | 6.05 | 18.40 | h | 27.24 | d | 47.91 | c | 52.97 | b | 67.67 | f | 71.30 | a | 66.26 | b | 62.40 | 48.22 | a | 33.87 | d | 17.44 | f | 46.24 | c | ||
2006 | 23.74 | 10.76 | e | 28.48 | b | 49.13 | c | 57.48 | a | 66.66 | a | 74.21 | b | 69.02 | 57.29 | b | 42.10 | e | 32.17 | d | 23.80 | a | 44.57 | |||
2007 | 14.08 | g | 7.35 | e | 31.71 | e | 40.83 | 58.48 | c | 67.29 | b | 70.37 | 66.27 | e | 59.67 | a | 48.20 | a | 30.64 | e | 9.17 | e | 44.54 | a | ||
2008 | 5.48 | h | 7.78 | d | 22.63 | d | 39.70 | b | 52.53 | a | 63.15 | f | 66.50 | h | 69.27 | a | ----- | z | 45.69 | b | 30.07 | h | 7.68 | i | 39.60 | f |
2009 | 0.25 | e | 9.45 | i | 25.08 | f | 39.12 | b | 54.17 | d | 62.38 | 65.27 | 65.27 | a | 63.57 | 39.10 | b | 37.84 | a | 10.64 | j | 47.44 | c | |||
2010 | 8.73 | g | 10.62 | c | 34.40 | b | 51.17 | 57.74 | b | 62.60 | o | 69.98 | d | 69.24 | d | 54.50 | b | 48.92 | a | 30.81 | d | 11.78 | h | 47.49 | c | |
2011 | 2.07 | h | 12.34 | c | 21.44 | e | 40.95 | b | 55.07 | b | 65.18 | b | 73.62 | a | 69.03 | 58.53 | 50.02 | b | 32.21 | b | 23.98 | d | 45.67 | a | ||
2012 | 19.82 | i | 19.92 | e | 40.81 | g | 46.22 | c | 59.58 | e | 68.62 | b | 75.22 | a | 67.77 | 58.80 | 43.27 | 30.18 | 15.79 | 48.54 | b | |||||
2013 | 11.27 | 10.40 | c | 16.50 | 31.75 | 55.26 | 65.52 | 70.65 | 69.68 | 63.42 | 43.94 | 27.27 | 4.87 | 39.21 | ||||||||||||
2014 | 2.76 | 0.93 | 21.03 | 38.95 | 55.40 | a | 65.75 | 67.60 | 69.67 | m | 58.82 | e | 46.79 | 20.90 | a | 20.21 | 36.28 | a | ||||||||
2015 | 13.69 | 5.62 | 30.85 | 45.70 | 54.95 | 66.50 | 71.02 | 67.65 | 64.87 | 48.82 | a | 36.52 | 23.82 | 44.17 | ||||||||||||
2016 | 12.74 | 21.12 | 37.23 | 42.53 | 59.35 | 66.97 | 70.05 | 69.10 | 60.87 | 47.72 | a | 40.65 | 14.53 | 45.24 | ||||||||||||
2017 | 13.31 | 23.55 | ----- | z | 44.38 | 55.68 | 66.65 | 70.76 | 65.23 | ----- | z | 46.63 | 28.07 | 12.97 | 42.72 | b | ||||||||||
2018 | 10.52 | 6.52 | 27.37 | 34.65 | 62.94 | 69.52 | 70.38 | a | 68.00 | a | ----- | z | 39.65 | 22.28 | a | ----- | z | 41.18 | b | |||||||
2019 | 6.29 | 2.30 | ----- | z | ----- | z | 51.98 | a | 66.88 | 71.26 | 65.15 | 60.53 | a | 41.13 | 26.60 | 15.73 | 40.79 | b | ||||||||
2020 | 12.06 | 13.45 | a | 29.87 | 39.47 | 53.42 | a | 70.28 | a | 72.29 | 69.97 | 58.07 | 38.11 | 33.25 | b | 21.05 | 42.61 | |||||||||
2021 | 18.81 | 4.68 | 35.74 | 41.37 | 57.42 | 71.58 | 73.92 | 71.11 | 63.88 | 51.05 | 32.89 | b | 16.71 | 44.93 | ||||||||||||
2022 | ----- | z | 5.57 | 24.92 | 35.18 | ----- | z | 69.27 | 71.55 | 68.63 | 61.95 | 47.79 | 28.17 | 10.79 | 42.38 | b | ||||||||||
2023 | 12.66 | 12.80 | 16.53 | ----- | z | ----- | z | ----- | z | 68.83 | b | 70.00 | 65.33 | 47.06 | 32.55 | 29.37 | 39.46 | c | ||||||||
2024 | 14.44 | 27.88 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.16 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 7.90 | 13.51 | 26.95 | 43.20 | 56.81 | 66.56 | 70.90 | 68.96 | 59.57 | 46.24 | 29.31 | 15.00 | 42.19 | |||||||||||||
S.D. | 6.98 | 7.27 | 6.18 | 4.43 | 3.56 | 2.83 | 2.47 | 2.78 | 3.14 | 3.65 | 5.29 | 6.62 | 1.96 | |||||||||||||
SKEW | 0.03 | 0.40 | -0.09 | -0.04 | 0.45 | -0.31 | -0.37 | 0.10 | -0.37 | -0.13 | 0.09 | -0.07 | 0.02 | |||||||||||||
MAX | 23.74 | 28.71 | 37.23 | 52.38 | 67.56 | 74.09 | 75.22 | 75.16 | 65.45 | 57.93 | 42.24 | 29.37 | 45.97 | |||||||||||||
MIN | -5.07 | 0.21 | 15.39 | 31.75 | 49.74 | 58.58 | 63.68 | 62.76 | 49.52 | 36.61 | 17.48 | 0.17 | 38.53 | |||||||||||||
YRS | 53 | 57 | 55 | 61 | 59 | 58 | 62 | 60 | 60 | 60 | 61 | 55 | 35 |