YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | 7.63 | 14.61 | 22.68 | 36.17 | 55.90 | 67.63 | 69.66 | 67.61 | 61.35 | 53.00 | 28.37 | 12.07 | a | 41.39 | ||||||||||||
1951 | 8.29 | 16.98 | 22.40 | b | 41.65 | 60.82 | 62.63 | 69.87 | a | 65.48 | 54.15 | 46.76 | 24.23 | 15.08 | 40.70 | |||||||||||
1952 | 10.68 | 20.34 | 24.06 | 47.77 | 55.95 | 67.13 | 70.90 | 66.44 | 61.12 | 41.65 | a | 33.35 | 23.19 | 43.55 | ||||||||||||
1953 | 14.97 | 14.14 | 28.69 | 39.47 | 56.16 | 68.40 | 69.85 | 71.21 | 59.90 | 54.95 | 37.07 | 20.11 | 44.58 | |||||||||||||
1954 | 7.68 | 27.76 | a | 25.87 | 44.42 | 50.58 | 68.62 | 71.17 | a | 68.40 | 58.17 | 46.40 | 36.43 | 22.52 | 44.00 | |||||||||||
1955 | 10.60 | 12.36 | 23.84 | 51.42 | 61.52 | 66.70 | 76.53 | 73.81 | 60.45 | 49.34 | 25.38 | 9.15 | 43.42 | |||||||||||||
1956 | 10.76 | 11.41 | 23.11 | 40.27 | 55.10 | b | 69.85 | 66.90 | 68.05 | 56.42 | 54.48 | 32.28 | 19.65 | 42.36 | ||||||||||||
1957 | 6.02 | 16.88 | 27.13 | 44.57 | 55.06 | 64.43 | 73.81 | 68.53 | 57.28 | 47.00 | 32.30 | 22.47 | 42.96 | |||||||||||||
1958 | 19.36 | f | ----- | z | 30.93 | a | 45.27 | 57.11 | 60.37 | 67.73 | 67.95 | 60.82 | 50.29 | 33.65 | 14.00 | 48.81 | b | |||||||||
1959 | 7.97 | 15.04 | 31.44 | 44.47 | 59.53 | 68.10 | 71.63 | 72.55 | 61.22 | 43.48 | 23.19 | a | 27.52 | a | 43.84 | |||||||||||
1960 | 15.11 | 16.52 | a | 20.05 | 44.72 | 56.55 | 62.82 | 70.68 | 71.87 | 61.52 | 49.11 | 34.33 | 17.42 | 43.39 | ||||||||||||
1961 | 12.40 | 24.48 | 33.82 | 38.90 | 54.63 | 66.42 | 69.47 | 71.45 | 59.12 | 49.90 | 32.30 | 16.27 | 44.10 | |||||||||||||
1962 | 6.63 | 11.89 | 28.05 | 42.02 | 60.03 | 65.48 | 67.15 | a | 67.85 | 56.85 | 50.73 | 35.53 | 18.66 | 42.57 | ||||||||||||
1963 | 2.90 | 11.32 | 32.35 | 47.02 | 54.47 | 69.02 | 72.37 | 67.95 | 61.95 | 58.50 | 37.82 | 8.48 | 43.68 | |||||||||||||
1964 | 19.47 | 19.47 | 25.23 | 45.78 | 60.56 | 67.02 | 74.81 | 66.52 | a | 58.10 | 47.18 | 34.30 | 12.26 | 44.22 | ||||||||||||
1965 | 7.03 | 8.93 | 18.18 | 41.02 | 58.48 | 64.90 | 67.65 | 66.89 | 52.12 | 49.55 | 32.25 | 25.69 | 41.06 | |||||||||||||
1966 | 0.05 | 13.64 | 33.77 | 41.08 | 51.69 | 67.08 | 74.89 | 66.60 | 59.43 | 46.66 | 29.57 | 16.03 | 41.71 | |||||||||||||
1967 | 13.42 | 6.41 | 28.03 | 43.45 | 51.47 | 65.18 | 67.85 | 64.89 | 59.25 | 45.19 | 30.50 | 20.03 | 41.31 | |||||||||||||
1968 | 12.74 | 12.41 | 36.50 | 47.57 | 52.98 | 65.48 | 68.53 | 68.60 | 59.98 | 50.47 | 33.08 | 15.47 | 43.65 | |||||||||||||
1969 | 8.16 | 18.46 | 23.89 | 46.62 | 58.17 | a | 59.27 | 69.97 | 72.45 | 61.33 | 44.60 | 31.47 | 19.03 | a | 42.78 | |||||||||||
1970 | 3.92 | 12.75 | 23.55 | b | 44.43 | 56.53 | 69.05 | 72.48 | 69.31 | 58.95 | 48.73 | 30.67 | 18.17 | a | 42.38 | |||||||||||
1971 | 3.81 | 14.80 | 25.39 | 44.43 | 53.27 | a | 70.00 | 67.08 | 66.52 | 61.28 | 51.98 | 32.80 | 17.60 | 42.41 | ||||||||||||
1972 | 5.28 | d | 8.36 | 23.60 | 40.42 | 60.34 | 64.22 | 68.34 | 68.56 | 57.70 | 43.23 | 32.26 | a | 11.60 | 40.32 | |||||||||||
1973 | 14.61 | 18.70 | 39.42 | 43.98 | 54.11 | 67.58 | 70.82 | 71.85 | 59.07 | 53.98 | 33.82 | 15.97 | 45.33 | |||||||||||||
1974 | 11.73 | a | 15.50 | 28.27 | 45.93 | 53.87 | a | 63.38 | 74.56 | 66.77 | a | 54.87 | 48.87 | 34.37 | 23.71 | 43.49 | ||||||||||
1975 | 12.95 | 16.38 | 21.70 | a | 39.13 | 60.76 | 66.73 | 73.76 | 69.15 | 56.12 | 51.00 | 35.07 | 17.77 | 43.38 | ||||||||||||
1976 | 6.50 | a | 25.05 | 28.10 | 49.35 | 56.50 | 69.32 | 73.60 | 71.10 | 59.08 | 42.45 | 24.47 | 7.68 | 42.77 | ||||||||||||
1977 | -2.21 | 18.91 | 36.53 | 51.82 | 66.23 | 66.62 | 72.85 | 64.84 | 60.00 | 47.39 | 31.37 | 14.43 | a | 44.06 | ||||||||||||
1978 | 5.50 | 9.41 | 27.50 | 43.18 | 59.92 | a | 64.53 | 68.66 | 69.02 | 63.97 | a | 47.63 | 28.72 | 10.81 | 41.57 | |||||||||||
1979 | -1.23 | a | 7.43 | 26.05 | a | 41.45 | 52.27 | 64.28 | 69.82 | 65.66 | 60.08 | 44.52 | 30.73 | 23.13 | 40.35 | |||||||||||
1980 | 11.52 | 12.09 | 24.81 | 47.85 | 59.32 | 64.58 | 71.06 | 69.06 | 57.88 | 43.74 | 34.47 | 17.15 | a | 42.79 | ||||||||||||
1981 | 15.89 | 19.57 | a | 34.66 | 46.88 | 55.32 | 65.60 | 70.19 | 68.77 | 58.12 | 45.11 | 37.22 | 16.02 | 44.45 | ||||||||||||
1982 | -1.16 | 14.87 | a | 27.37 | 41.88 | a | 62.40 | 62.22 | c | 73.89 | 68.81 | 58.82 | b | 49.65 | 30.00 | a | 25.12 | a | 42.82 | |||||||
1983 | 15.79 | 24.86 | 34.06 | 41.32 | 52.84 | 66.63 | 75.32 | 74.37 | 61.70 | 48.24 | 33.78 | a | 2.34 | 44.27 | ||||||||||||
1984 | 9.92 | 26.90 | 24.84 | 46.80 | 55.08 | 67.43 | 70.98 | 72.55 | 55.78 | a | 51.10 | a | 33.16 | a | 17.62 | a | 44.35 | |||||||||
1985 | 8.23 | 13.70 | 33.87 | 49.52 | a | 61.55 | a | 62.87 | 70.31 | 66.05 | 58.87 | 46.94 | 23.64 | a | 5.38 | a | 41.74 | |||||||||
1986 | 15.10 | 12.00 | a | 33.43 | a | 49.68 | 59.58 | 68.05 | 73.81 | 66.85 | 59.38 | 48.66 | 28.10 | 22.58 | 44.77 | |||||||||||
1987 | 19.65 | 30.29 | 37.35 | 53.72 | 62.27 | 71.71 | a | 75.16 | 69.19 | 62.34 | a | 42.82 | 37.02 | 23.45 | a | 48.75 | ||||||||||
1988 | 7.32 | 10.44 | b | 30.98 | a | 46.50 | a | 64.71 | 72.83 | 76.61 | 72.69 | 61.48 | a | 42.19 | 32.17 | a | 17.05 | 44.58 | ||||||||
1989 | 17.47 | a | 6.62 | 24.53 | 42.78 | 57.81 | 65.95 | 74.69 | 70.73 | 60.95 | a | 49.55 | 26.67 | 9.15 | 42.24 | |||||||||||
1990 | 24.60 | 22.04 | 34.65 | a | 45.50 | 55.39 | 67.75 | 69.81 | 69.18 | 61.40 | 45.39 | 35.09 | a | 14.53 | 45.44 | |||||||||||
1991 | 8.95 | 21.00 | 30.65 | 47.29 | b | 60.73 | 71.60 | 70.94 | 71.73 | 59.27 | 46.13 | 24.33 | 18.48 | a | 44.26 | |||||||||||
1992 | 20.02 | 27.80 | b | 32.58 | a | 42.00 | c | 60.56 | 64.65 | 63.52 | a | 63.70 | a | 57.86 | a | 45.36 | b | 30.67 | 19.84 | 44.05 | ||||||
1993 | 10.10 | a | 15.78 | a | 26.00 | b | 41.83 | a | 55.11 | 62.38 | 69.15 | 69.45 | c | 52.66 | e | 44.97 | b | 28.93 | b | 18.94 | e | 41.27 | ||||
1994 | 0.34 | 7.16 | c | 31.22 | f | 42.62 | d | 56.52 | c | 67.96 | d | 68.88 | a | 66.78 | d | 62.43 | 50.88 | b | 36.60 | a | 24.37 | e | 44.05 | a | ||
1995 | 14.66 | b | 14.42 | d | 30.76 | 37.54 | g | 53.33 | e | 69.21 | a | 71.12 | g | 72.23 | c | 57.48 | f | 47.47 | b | 25.74 | e | 14.00 | a | 37.98 | c | |
1996 | 5.39 | c | 11.22 | b | 19.85 | e | 37.52 | b | 53.90 | f | 65.19 | d | 66.87 | a | 68.90 | b | 60.42 | e | 47.82 | a | 24.58 | d | 13.28 | b | 38.27 | a |
1997 | 7.48 | b | 17.79 | d | 29.85 | d | 43.59 | a | 54.02 | d | 70.31 | a | 71.97 | 68.90 | a | 63.60 | 50.77 | a | 29.69 | a | 25.89 | c | 44.49 | |||
1998 | 19.44 | 32.70 | a | 32.52 | a | 51.33 | 65.41 | c | 66.12 | 72.62 | a | 72.40 | a | 67.09 | c | 51.50 | a | 37.12 | b | 23.87 | 49.34 | |||||
1999 | 11.52 | a | 27.09 | a | 35.28 | b | 50.14 | b | 60.41 | b | 67.64 | b | 75.32 | a | 70.37 | 61.00 | 48.84 | 40.67 | a | 23.74 | b | 47.67 | ||||
2000 | 13.47 | 24.48 | 38.39 | c | 45.05 | 60.48 | 64.78 | 71.74 | 71.02 | 59.58 | 50.66 | b | 30.65 | 5.44 | 44.65 | |||||||||||
2001 | 18.79 | 10.87 | b | 26.89 | 46.93 | 57.80 | d | 67.57 | a | 73.33 | d | 71.76 | 59.61 | b | 46.48 | c | 42.54 | b | 24.45 | a | 45.58 | |||||
2002 | 19.18 | a | 23.77 | 19.98 | c | 40.53 | a | 46.72 | b | 64.62 | b | 71.58 | a | 68.02 | c | 61.81 | d | 38.83 | b | 29.18 | b | 21.48 | a | 42.14 | ||
2003 | 12.29 | c | 9.25 | b | 24.64 | b | 42.92 | d | 53.14 | b | ----- | z | 68.19 | b | 69.85 | d | 58.45 | b | 45.90 | b | 28.68 | b | 20.02 | c | 39.39 | a |
2004 | 6.80 | a | 14.31 | c | 30.13 | e | 43.98 | a | 51.00 | e | 60.67 | a | 67.57 | d | 61.39 | c | 63.86 | a | 47.56 | 33.79 | a | 16.23 | c | 41.44 | ||
2005 | 10.27 | a | 20.98 | 24.87 | a | 47.19 | f | 51.76 | b | 68.77 | b | 71.22 | f | 68.66 | b | 63.98 | a | 50.26 | d | ----- | z | 19.33 | a | 42.10 | c | |
2006 | 26.71 | b | 18.69 | a | 32.02 | a | 50.80 | b | 58.29 | e | 69.08 | e | 75.89 | 70.40 | 59.52 | c | 46.69 | e | 35.60 | a | 28.81 | 47.71 | ||||
2007 | 18.17 | a | 9.45 | 34.33 | a | 45.52 | c | 61.16 | 70.12 | 73.10 | a | 69.94 | 62.24 | a | 53.02 | a | 34.05 | a | 14.38 | b | 45.46 | |||||
2008 | 12.92 | 12.52 | 24.89 | 42.22 | 53.91 | c | 65.27 | 71.04 | c | 69.48 | 62.33 | a | 48.77 | a | 34.80 | b | 12.15 | a | 42.52 | |||||||
2009 | 2.65 | 19.05 | 30.13 | 45.57 | 56.55 | a | 65.65 | 66.64 | b | 67.03 | a | 66.90 | a | 43.00 | 40.46 | b | 16.89 | 43.38 | ||||||||
2010 | 12.16 | b | 16.06 | c | 38.65 | 52.45 | a | 58.68 | 66.83 | 73.48 | a | 72.87 | a | 57.68 | 50.76 | 33.40 | a | 14.98 | 45.67 | |||||||
2011 | 7.43 | a | 13.82 | 26.27 | a | 42.40 | d | 55.89 | 66.27 | 75.35 | 69.61 | 59.17 | a | 53.13 | 37.15 | 26.02 | a | 44.38 | ||||||||
2012 | 21.76 | 26.66 | 43.76 | 48.00 | 61.40 | 68.22 | a | 76.37 | a | 68.69 | 61.63 | 46.77 | 35.17 | 22.63 | 48.42 | |||||||||||
2013 | 14.65 | 15.44 | a | 23.43 | a | 37.89 | b | 55.97 | b | 65.47 | 70.53 | 69.90 | 64.29 | d | 48.71 | 33.10 | d | 10.37 | 42.48 | |||||||
2014 | 1.79 | 4.12 | 22.50 | 40.88 | 56.53 | b | 67.15 | 69.76 | 70.82 | 60.18 | 47.63 | 24.12 | 24.61 | 40.84 | ||||||||||||
2015 | 15.47 | a | 6.29 | 31.11 | 46.93 | b | 57.15 | 66.57 | 71.05 | 68.55 | 67.20 | 49.58 | 41.57 | 31.13 | 46.05 | |||||||||||
2016 | 15.32 | 22.41 | 38.50 | 46.47 | 58.23 | 67.62 | 71.32 | 70.13 | 63.53 | 51.26 | 42.10 | 19.52 | b | 47.20 | ||||||||||||
2017 | 18.90 | 26.21 | 30.95 | 45.15 | 55.27 | a | 66.50 | 70.48 | 65.15 | 63.98 | a | 50.39 | 31.20 | 16.94 | 45.09 | |||||||||||
2018 | 13.58 | 10.84 | 28.56 | 33.67 | 64.35 | a | 69.20 | 71.13 | 70.27 | 63.25 | 43.73 | 27.40 | 25.10 | 43.42 | ||||||||||||
2019 | 13.27 | 8.62 | 23.31 | 43.06 | c | 51.93 | a | 66.36 | a | 72.11 | 67.40 | 63.48 | 45.16 | 28.20 | 23.05 | 42.16 | ||||||||||
2020 | 20.37 | 19.59 | a | 35.18 | a | 42.97 | a | 55.89 | 69.20 | 72.82 | a | 70.77 | 58.33 | 41.77 | 37.25 | 23.88 | a | 45.67 | ||||||||
2021 | 19.76 | 9.05 | 38.32 | 44.37 | 57.05 | 71.90 | 72.53 | 71.42 | 63.18 | 54.18 | 36.13 | 22.08 | 46.66 | |||||||||||||
2022 | 5.48 | a | 11.12 | 29.83 | a | 38.35 | 59.10 | 68.20 | 72.63 | 69.74 | 62.62 | 50.90 | 35.00 | 16.82 | 43.32 | |||||||||||
2023 | 21.37 | a | 18.09 | 27.15 | 42.16 | a | 60.95 | 71.27 | 70.53 | 70.63 | 66.32 | 51.95 | 36.25 | b | 31.96 | c | 47.38 | |||||||||
2024 | 21.33 | d | 31.28 | 35.14 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.25 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.48 | 16.37 | 29.15 | 44.37 | 57.15 | 66.72 | 71.30 | 69.11 | 60.35 | 48.15 | 32.45 | 18.34 | 43.83 | |||||||||||||
S.D. | 6.47 | 6.67 | 5.53 | 3.97 | 3.81 | 2.72 | 2.77 | 2.47 | 3.03 | 3.63 | 4.57 | 6.05 | 2.05 | |||||||||||||
SKEW | -0.00 | 0.49 | 0.29 | 0.03 | 0.05 | -0.28 | -0.12 | -0.37 | -0.15 | 0.04 | -0.10 | -0.25 | 0.63 | |||||||||||||
MAX | 26.71 | 32.70 | 43.76 | 53.72 | 66.23 | 72.83 | 76.61 | 74.37 | 67.20 | 58.50 | 42.54 | 31.96 | 49.34 | |||||||||||||
MIN | -2.21 | 4.13 | 18.18 | 33.67 | 46.72 | 59.27 | 63.52 | 61.39 | 52.12 | 38.83 | 23.19 | 2.34 | 40.32 | |||||||||||||
YRS | 74 | 74 | 74 | 72 | 73 | 73 | 72 | 74 | 73 | 74 | 73 | 74 | 68 |