YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.40 | 62.15 | 57.93 | 48.89 | 23.75 | 7.68 | 44.47 | f | ||||||
1951 | 4.90 | 13.79 | 18.32 | 40.12 | 57.45 | 60.37 | 67.47 | 62.65 | 53.23 | 44.95 | 21.90 | 12.61 | 38.15 | |||||||||||||
1952 | 8.65 | 17.95 | 21.44 | 46.17 | 54.06 | 65.82 | 69.06 | 64.13 | 58.93 | 39.69 | 31.02 | 21.24 | 41.51 | |||||||||||||
1953 | 11.50 | 10.82 | 26.10 | 38.17 | 53.55 | 66.30 | 67.55 | 69.10 | 57.35 | 52.50 | 33.65 | 17.24 | 41.99 | |||||||||||||
1954 | 4.71 | 24.55 | 23.74 | 42.05 | 48.95 | 66.48 | 69.03 | 65.10 | 55.42 | 43.21 | 34.33 | 19.89 | 41.46 | |||||||||||||
1955 | 8.23 | 9.46 | 20.10 | 49.87 | 58.94 | 64.92 | 73.87 | 70.74 | 57.17 | 46.90 | 22.65 | 6.84 | 40.81 | |||||||||||||
1956 | 8.63 | 8.41 | 20.68 | 37.33 | 53.27 | 66.62 | 64.94 | 65.71 | 53.28 | 52.53 | 30.08 | 16.56 | 39.84 | |||||||||||||
1957 | 3.02 | 13.36 | 23.69 | 42.30 | 52.79 | 62.05 | 71.24 | 66.08 | 54.72 | 44.39 | 30.05 | 20.00 | 40.31 | |||||||||||||
1958 | 16.53 | 10.05 | 28.90 | 43.53 | 54.18 | 57.67 | 65.90 | 65.05 | 57.93 | 47.87 | 31.47 | 9.90 | 40.75 | |||||||||||||
1959 | 4.19 | 10.21 | 29.37 | 41.15 | 56.79 | 66.38 | 69.45 | 70.31 | 58.32 | 42.06 | 20.27 | 24.69 | 41.10 | |||||||||||||
1960 | 12.00 | 12.67 | 16.82 | 42.40 | 54.10 | 60.22 | 68.00 | 68.66 | 58.73 | 46.58 | 31.72 | 13.60 | 40.46 | |||||||||||||
1961 | 9.39 | 23.59 | 34.23 | 39.10 | 53.55 | 65.10 | 68.19 | e | 71.11 | 59.03 | 49.16 | 32.28 | 14.89 | 43.30 | ||||||||||||
1962 | 6.94 | 12.05 | 27.32 | a | 41.68 | 59.45 | a | 64.68 | 64.21 | s | ----- | z | 55.95 | 50.03 | 34.88 | 18.13 | a | 37.11 | b | |||||||
1963 | 2.32 | 9.74 | c | 33.23 | 46.95 | 54.32 | 67.38 | 70.57 | h | 66.56 | 60.60 | 56.24 | 36.52 | g | 8.19 | 40.55 | b | |||||||||
1964 | 18.76 | 19.24 | 24.19 | 45.75 | 60.22 | a | 64.92 | d | 72.45 | 66.00 | 57.82 | 47.23 | a | 31.98 | a | 9.97 | a | 43.21 | ||||||||
1965 | 6.27 | 9.46 | 17.37 | 41.48 | 58.05 | 63.25 | d | 67.65 | 66.08 | 51.03 | a | 49.06 | e | 30.80 | 23.60 | 40.34 | ||||||||||
1966 | -0.11 | 13.09 | 32.95 | a | 40.18 | 51.02 | 66.15 | 72.98 | 63.88 | a | 57.43 | 45.65 | 26.21 | d | 14.90 | 40.36 | ||||||||||
1967 | 12.65 | 6.95 | 27.26 | 43.30 | 49.71 | 64.23 | 67.78 | b | 64.52 | 57.77 | 44.74 | 27.29 | d | 23.64 | i | 42.38 | a | |||||||||
1968 | ----- | z | 10.98 | 36.90 | 47.03 | 52.82 | 64.37 | 68.83 | a | 67.68 | a | 58.53 | 50.22 | b | 32.20 | 14.84 | 45.86 | a | ||||||||
1969 | 7.47 | 17.32 | 22.26 | 45.95 | 57.65 | 58.77 | 68.60 | 71.27 | 59.58 | 43.73 | 29.93 | a | 18.50 | a | 41.75 | |||||||||||
1970 | 3.57 | a | 13.81 | b | 22.32 | a | 43.21 | b | 55.02 | 67.55 | a | 71.21 | 68.35 | 58.13 | 46.60 | 29.32 | 15.39 | 41.21 | ||||||||
1971 | 3.10 | 13.91 | 24.98 | 44.38 | 51.70 | a | 67.60 | a | 64.21 | 64.26 | 56.31 | a | 49.92 | 31.15 | 15.45 | c | 40.58 | |||||||||
1972 | 3.05 | 8.09 | a | 23.05 | 38.55 | 57.29 | 62.55 | 66.48 | 66.02 | 54.82 | 40.62 | b | 30.69 | a | ----- | z | 41.02 | a | ||||||||
1973 | 9.72 | a | 14.32 | c | 37.50 | a | 44.05 | b | 51.18 | a | 64.65 | 67.70 | a | 69.58 | ----- | z | 50.35 | ----- | z | 12.54 | h | 45.45 | c | |||
1974 | 9.00 | a | 7.00 | o | 25.05 | a | 42.72 | 51.26 | b | 61.80 | b | 70.18 | a | 62.88 | a | 51.41 | b | 45.32 | ----- | z | ----- | z | 46.63 | c | ||
1975 | 11.87 | 14.48 | c | 20.48 | c | 37.46 | e | 58.41 | b | 62.43 | b | 68.52 | 65.63 | a | 52.84 | a | 47.21 | 40.98 | h | 13.50 | b | 41.17 | a | |||
1976 | 5.68 | a | 21.36 | 25.19 | 48.10 | 54.31 | 67.38 | a | 71.00 | b | 67.52 | b | 56.70 | b | 40.53 | 23.86 | a | 4.79 | b | 40.54 | ||||||
1977 | -2.25 | a | 17.30 | 33.90 | 49.07 | 64.73 | 65.02 | 69.83 | a | 62.12 | a | 57.32 | 44.58 | 29.07 | 13.27 | a | 42.00 | |||||||||
1978 | 4.40 | 8.93 | 26.57 | a | 41.95 | 59.15 | 62.98 | a | 67.23 | 67.36 | b | 60.41 | a | 45.77 | a | 28.45 | b | ----- | z | 43.02 | a | |||||
1979 | -3.93 | b | 5.66 | 24.35 | 39.63 | 50.80 | a | 64.05 | 70.26 | 65.94 | 59.50 | 45.34 | 31.07 | 23.10 | a | 39.65 | ||||||||||
1980 | 9.11 | 11.78 | 22.23 | 47.05 | 60.45 | 62.73 | 69.63 | 66.71 | 54.30 | 41.52 | 32.05 | 14.85 | 41.03 | |||||||||||||
1981 | 13.58 | 19.05 | 33.05 | 45.07 | 54.71 | 62.45 | 68.52 | 67.16 | 56.18 | 42.25 | a | 36.52 | a | 15.55 | b | 42.84 | ||||||||||
1982 | -3.00 | e | 10.30 | a | 23.62 | b | 40.35 | f | 59.91 | d | 58.73 | f | 70.31 | e | 66.78 | h | 57.10 | i | 47.24 | j | 26.72 | a | 21.37 | 29.89 | e | |
1983 | 14.62 | c | 23.04 | a | 30.96 | e | 39.06 | c | 51.10 | b | 62.78 | e | 71.58 | e | 71.00 | h | 57.20 | h | 47.12 | g | 30.33 | f | -0.37 | e | 36.60 | d |
1984 | 9.69 | b | 24.95 | 22.45 | a | 45.39 | c | 52.88 | f | 65.18 | e | 68.06 | e | 69.58 | g | 52.60 | f | 48.42 | f | 30.21 | i | 14.55 | c | 35.75 | e | |
1985 | 7.54 | c | 11.12 | b | 31.89 | d | 44.93 | h | 58.48 | e | 59.02 | f | 66.96 | g | 62.39 | h | ----- | z | 44.56 | d | 20.98 | g | 3.60 | e | 26.20 | f |
1986 | 13.23 | 12.46 | a | 29.75 | a | 46.48 | j | 57.35 | d | 64.45 | h | ----- | z | 62.31 | e | 56.28 | ----- | z | ----- | z | 19.95 | b | 35.90 | e | ||
1987 | 17.63 | 27.27 | 35.71 | b | 51.69 | a | ----- | z | ----- | z | 72.42 | ----- | z | 58.28 | 41.47 | 34.98 | 22.29 | b | 40.19 | c | ||||||
1988 | 5.05 | a | 8.00 | 28.18 | a | 43.91 | a | 61.42 | a | 68.58 | 74.00 | e | 69.58 | a | ----- | z | 39.86 | m | 30.48 | 14.77 | 40.40 | b | ||||
1989 | 14.82 | 3.93 | 21.90 | a | 40.80 | 55.39 | 64.68 | 72.52 | 67.67 | b | 57.88 | 46.63 | a | 24.98 | a | 5.97 | 39.76 | |||||||||
1990 | 21.35 | 16.86 | 31.06 | 43.76 | a | 53.05 | 66.02 | a | 68.61 | 67.53 | 59.78 | 43.95 | a | 33.36 | a | 13.63 | 43.25 | |||||||||
1991 | 7.73 | 20.46 | 29.60 | a | 46.90 | 60.23 | a | 68.41 | a | 68.15 | a | 69.05 | 55.53 | 43.56 | 21.52 | 16.02 | 42.26 | |||||||||
1992 | 16.69 | 23.67 | 29.81 | 39.37 | 58.55 | 62.58 | 62.69 | 63.28 | a | 55.98 | 45.20 | a | 29.00 | 17.42 | 42.02 | |||||||||||
1993 | 9.89 | 14.93 | 27.27 | a | 40.27 | 55.02 | a | 61.78 | 67.87 | a | 67.55 | a | 52.02 | 43.36 | b | 26.52 | a | 17.53 | 40.33 | |||||||
1994 | -0.44 | 8.80 | 30.73 | a | 42.55 | 57.58 | a | 66.37 | 67.27 | 64.69 | 61.38 | a | 48.81 | 34.65 | 20.76 | 41.93 | ||||||||||
1995 | 13.29 | 13.43 | 29.63 | a | 37.63 | 54.33 | a | 68.76 | a | 68.82 | 70.03 | 56.37 | 45.24 | b | 21.75 | 13.38 | b | 41.06 | ||||||||
1996 | 5.06 | 12.28 | 20.77 | 37.80 | b | 53.11 | 64.57 | a | 66.63 | a | 68.13 | a | 58.93 | 45.62 | a | 22.95 | a | 11.89 | 38.98 | |||||||
1997 | 5.14 | b | 18.00 | 27.08 | a | 40.15 | 50.29 | b | 67.66 | a | 68.13 | 64.69 | b | 60.88 | 47.61 | 26.18 | b | 25.37 | 41.77 | |||||||
1998 | 17.03 | 30.71 | 30.88 | a | 48.42 | 62.81 | 63.35 | 70.47 | 69.57 | a | 62.33 | c | 49.18 | 34.12 | a | 21.18 | 46.67 | |||||||||
1999 | 9.03 | 23.34 | 31.76 | 45.75 | 59.05 | 64.37 | 72.77 | 67.15 | 58.84 | a | 45.08 | a | 38.90 | a | 22.45 | a | 44.87 | |||||||||
2000 | 11.62 | b | 23.28 | 38.45 | 42.87 | 58.18 | a | 61.97 | 69.68 | a | 69.19 | 57.30 | 50.37 | 31.79 | a | 5.35 | a | 43.34 | ||||||||
2001 | 16.42 | a | 8.86 | 26.29 | 44.35 | 58.13 | 66.17 | 72.13 | 71.58 | 58.22 | 46.35 | a | 42.95 | 25.84 | 44.77 | |||||||||||
2002 | 20.74 | 24.55 | 20.81 | 41.57 | 51.21 | 67.55 | 73.82 | 67.60 | 61.18 | 39.47 | 30.60 | 22.85 | 43.50 | |||||||||||||
2003 | 11.35 | 11.57 | 27.10 | 43.57 | 55.66 | 64.38 | 69.75 | a | 71.23 | 59.90 | 47.00 | 29.42 | 21.84 | 42.73 | ||||||||||||
2004 | 7.21 | 17.98 | 32.00 | 45.37 | 52.19 | 61.63 | 68.40 | 61.63 | 64.02 | 48.56 | 35.58 | 18.19 | 42.73 | |||||||||||||
2005 | 11.32 | 23.45 | 28.81 | 48.50 | 53.43 | a | 70.26 | a | 72.24 | 70.11 | c | 63.33 | 49.36 | b | 33.82 | 18.32 | 45.25 | |||||||||
2006 | 25.89 | 15.64 | 32.40 | 50.32 | 58.26 | 66.87 | 75.63 | 69.82 | 57.83 | 43.52 | 34.33 | 26.85 | a | 46.45 | ||||||||||||
2007 | 16.60 | 10.35 | a | 34.06 | 43.41 | a | 60.78 | a | 69.75 | 72.48 | a | 69.00 | 60.33 | 51.65 | 32.32 | 13.90 | 44.55 | |||||||||
2008 | 11.21 | 12.33 | 25.05 | 41.50 | 53.32 | 64.72 | 69.92 | a | 67.61 | 60.07 | 47.26 | 32.92 | 10.81 | 41.39 | ||||||||||||
2009 | 2.02 | 17.46 | 28.48 | 45.08 | 56.16 | 64.35 | 66.06 | 66.02 | 64.53 | 41.05 | 39.27 | 14.42 | 42.08 | |||||||||||||
2010 | 10.58 | a | 17.70 | 38.02 | 50.92 | 58.40 | 65.13 | 71.85 | 72.10 | 56.22 | 49.79 | 32.40 | 13.77 | 44.74 | ||||||||||||
2011 | 8.00 | ----- | z | 25.71 | 43.17 | 54.85 | 64.53 | 74.24 | d | 69.16 | 58.33 | 51.76 | 35.87 | 23.65 | 46.30 | a | ||||||||||
2012 | 18.85 | 25.74 | 43.61 | 46.42 | 60.08 | 68.05 | 75.18 | 68.24 | 58.32 | 44.47 | 33.13 | 19.63 | 46.81 | |||||||||||||
2013 | 12.82 | 15.05 | 23.42 | 36.02 | 55.15 | 64.42 | 70.19 | 70.00 | 61.90 | 46.37 | 28.38 | 6.65 | 40.86 | |||||||||||||
2014 | 2.82 | a | 4.11 | 19.79 | 38.10 | 55.90 | 66.88 | 68.50 | 68.48 | 58.68 | 46.42 | 22.80 | 22.63 | 39.59 | ||||||||||||
2015 | 14.13 | 6.48 | 31.63 | 46.45 | 56.24 | 65.50 | 71.56 | 67.32 | 65.48 | 47.48 | 38.47 | 28.47 | 44.94 | |||||||||||||
2016 | 13.79 | 21.45 | 36.90 | a | 44.35 | 57.23 | 67.07 | 71.02 | 70.00 | 61.97 | 49.48 | 41.18 | 18.18 | 46.05 | ||||||||||||
2017 | 17.19 | 25.57 | 29.97 | 46.90 | 55.31 | 65.77 | 69.23 | 65.11 | 64.78 | 50.06 | 29.52 | 14.39 | 44.48 | |||||||||||||
2018 | 10.92 | 11.54 | 28.55 | 33.32 | 64.65 | 67.95 | 70.90 | a | 69.66 | 60.92 | 41.94 | 24.45 | 23.42 | 42.35 | ||||||||||||
2019 | 9.58 | 8.48 | 23.83 | a | 41.23 | 51.37 | 65.40 | 70.85 | 66.24 | 60.75 | 43.68 | 26.80 | 18.27 | 40.54 | ||||||||||||
2020 | 17.34 | 16.53 | 32.35 | 40.35 | 53.97 | ----- | z | 72.39 | 69.31 | 55.95 | a | 39.30 | a | 34.65 | 21.63 | 41.25 | a | |||||||||
2021 | 18.48 | 8.75 | 36.23 | 43.65 | 56.13 | 70.53 | 70.94 | 69.58 | 61.32 | 51.79 | 33.63 | 19.26 | 45.02 | |||||||||||||
2022 | 5.56 | 10.57 | 27.11 | 38.62 | 57.65 | 66.68 | 70.02 | 67.05 | 60.02 | 48.48 | 32.40 | 14.30 | a | 41.54 | ||||||||||||
2023 | 19.00 | 17.75 | 24.23 | 41.73 | 61.02 | 68.80 | 69.26 | 67.90 | 63.50 | a | 48.95 | 33.93 | 31.66 | 45.64 | ||||||||||||
2024 | 19.48 | 30.29 | 32.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.47 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.00 | 15.16 | 27.89 | 43.10 | 55.95 | 65.09 | 69.72 | 67.29 | 58.35 | 46.38 | 30.69 | 16.60 | 42.28 | |||||||||||||
S.D. | 6.24 | 6.40 | 5.60 | 3.79 | 3.55 | 2.61 | 2.57 | 2.59 | 3.14 | 3.55 | 4.89 | 6.28 | 2.10 | |||||||||||||
SKEW | 0.03 | 0.51 | 0.27 | 0.04 | 0.25 | -0.36 | -0.03 | -0.34 | -0.04 | 0.08 | -0.08 | -0.28 | 0.48 | |||||||||||||
MAX | 25.89 | 30.71 | 43.61 | 51.69 | 64.73 | 70.53 | 75.63 | 72.10 | 65.48 | 56.24 | 42.95 | 31.66 | 46.81 | |||||||||||||
MIN | -3.93 | 3.93 | 16.82 | 33.32 | 48.95 | 57.67 | 62.69 | 61.63 | 51.03 | 39.30 | 20.27 | -0.37 | 38.15 | |||||||||||||
YRS | 73 | 72 | 74 | 70 | 71 | 68 | 70 | 68 | 68 | 69 | 66 | 69 | 55 |