YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.00 | n | 73.13 | 68.23 | 60.98 | 42.27 | a | 36.55 | 23.45 | 50.77 | f | |||||
1953 | 18.89 | 21.46 | 32.47 | 40.97 | 57.07 | a | 70.13 | 70.76 | 70.37 | 60.92 | 53.48 | d | 37.79 | a | 25.97 | 46.69 | ||||||||||
1954 | 16.10 | b | 33.82 | 30.66 | 50.10 | 52.87 | 70.77 | 73.34 | 68.39 | 61.36 | a | 48.06 | 37.98 | 23.18 | 47.22 | |||||||||||
1955 | 16.92 | 17.62 | 28.85 | 52.85 | 61.69 | 65.45 | 77.29 | 74.08 | 63.10 | 50.39 | 29.50 | 14.40 | a | 46.01 | ||||||||||||
1956 | 13.28 | a | 15.29 | a | 26.53 | 43.43 | 59.13 | ----- | z | 68.03 | 69.81 | 58.53 | 56.13 | 33.45 | a | 25.44 | 42.64 | a | ||||||||
1957 | 12.40 | 25.61 | 31.90 | 47.65 | 57.32 | 67.35 | 74.56 | 69.31 | b | 59.15 | 47.00 | 33.02 | 25.55 | 45.90 | ||||||||||||
1958 | 21.18 | 15.75 | 32.16 | l | 46.98 | 59.05 | 62.30 | 68.44 | 70.02 | 61.85 | 53.24 | 36.10 | a | 15.26 | 46.38 | a | ||||||||||
1959 | 10.77 | 14.64 | 29.35 | 46.85 | 61.74 | 68.21 | b | 69.60 | 72.77 | 60.53 | 44.37 | 24.46 | f | 29.64 | b | 46.23 | a | |||||||||
1960 | 20.50 | b | 20.66 | 20.39 | 46.83 | d | 56.92 | 63.68 | 69.27 | 70.35 | a | 61.58 | 48.32 | 36.15 | 20.00 | 44.55 | ||||||||||
1961 | 15.90 | 25.93 | 32.27 | 39.40 | a | 54.65 | 66.86 | a | 68.27 | g | 69.77 | 58.96 | b | 50.88 | b | 33.48 | 17.19 | 42.30 | a | |||||||
1962 | 11.27 | 16.33 | a | 26.08 | a | 42.16 | b | 62.64 | b | 64.98 | a | 66.85 | d | 67.95 | b | 56.54 | c | 50.74 | 36.85 | g | 21.05 | 44.24 | a | |||
1963 | 6.18 | 19.00 | b | 39.42 | e | 44.00 | 53.05 | a | 66.87 | 69.55 | i | 65.38 | b | 58.78 | 55.66 | 33.89 | u | 11.74 | 42.01 | b | ||||||
1964 | 23.23 | 25.57 | 29.06 | 46.96 | b | 62.18 | 68.16 | a | 75.23 | a | 67.38 | a | 58.77 | 46.50 | 35.70 | 16.00 | 46.23 | |||||||||
1965 | 10.65 | 13.02 | 19.87 | 42.22 | a | 60.03 | 64.72 | 69.10 | a | 66.66 | c | 56.27 | 49.22 | a | 34.13 | 29.02 | 42.91 | |||||||||
1966 | 4.70 | a | 15.96 | 35.15 | a | 41.68 | 51.70 | a | 65.62 | 71.94 | 65.85 | 57.45 | a | 47.08 | a | 32.25 | 19.69 | 42.42 | ||||||||
1967 | 16.55 | 10.89 | 31.71 | 45.50 | 50.87 | 65.73 | 67.05 | b | 63.84 | 57.25 | 45.90 | 29.88 | 23.30 | c | 42.37 | |||||||||||
1968 | 15.28 | a | 15.24 | b | 36.94 | 46.65 | 52.41 | b | 65.07 | 68.52 | 68.16 | 58.52 | 50.23 | a | 32.90 | d | 19.05 | a | 44.08 | |||||||
1969 | 11.06 | 19.55 | 22.69 | 47.10 | 57.58 | 58.72 | 69.18 | 68.55 | 58.59 | b | 45.00 | 31.88 | 19.73 | a | 42.47 | |||||||||||
1970 | 4.79 | 15.95 | 26.94 | 45.08 | 58.55 | 66.63 | 71.21 | 69.03 | 60.33 | 48.83 | a | 33.12 | b | 17.74 | b | 43.18 | ||||||||||
1971 | 8.22 | a | 17.02 | 25.85 | 45.47 | 52.25 | c | 71.12 | 66.37 | 66.31 | 62.19 | a | 54.90 | 34.04 | b | 22.24 | b | 43.83 | ||||||||
1972 | 10.17 | b | 12.14 | k | 26.54 | e | 42.27 | o | 61.81 | o | 65.76 | a | 67.02 | g | 69.40 | b | 59.85 | 45.40 | 33.28 | 14.35 | 40.59 | d | ||||
1973 | 18.37 | 23.64 | 40.61 | 43.30 | 54.10 | 67.75 | 71.87 | 69.53 | 60.13 | 54.45 | 36.45 | 18.35 | 46.55 | |||||||||||||
1974 | 15.92 | 18.59 | 32.05 | 48.00 | 54.61 | 63.60 | 73.77 | 66.34 | 55.63 | 50.02 | 36.42 | 24.00 | 44.91 | |||||||||||||
1975 | 16.65 | 18.36 | 23.18 | 39.87 | 60.50 | 66.88 | 71.90 | 70.26 | 55.57 | 51.66 | 37.57 | 22.44 | 44.57 | |||||||||||||
1976 | 13.80 | a | 27.88 | 33.95 | 48.73 | 55.23 | 67.38 | 72.18 | 67.79 | 59.08 | 43.18 | 27.23 | 11.45 | 43.99 | ||||||||||||
1977 | 1.82 | 22.64 | 39.79 | 53.28 | 65.21 | 67.53 | 73.69 | 65.82 | a | 61.45 | 47.45 | 32.80 | 16.63 | 45.68 | ||||||||||||
1978 | 6.27 | 9.23 | 28.37 | a | 45.68 | 58.79 | 67.47 | 70.34 | c | 68.19 | 65.60 | a | 48.53 | 32.55 | 16.79 | 43.15 | ||||||||||
1979 | 2.56 | 10.02 | 29.97 | 42.38 | 56.32 | 66.63 | 70.03 | 68.92 | 62.37 | 48.11 | 33.95 | 28.32 | 43.30 | |||||||||||||
1980 | 17.85 | 16.41 | 28.11 | 47.52 | 59.34 | 67.77 | 73.23 | 70.81 | 62.20 | 45.08 | 36.27 | 21.37 | 45.50 | |||||||||||||
1981 | 20.27 | 24.39 | 36.60 | 50.55 | 55.00 | 65.90 | 69.60 | 68.13 | 59.25 | 47.18 | 36.50 | 18.56 | 45.99 | |||||||||||||
1982 | 5.92 | a | 16.84 | 29.50 | 41.63 | 58.65 | 58.93 | 70.40 | 68.21 | 59.68 | 48.74 | b | 32.92 | 26.02 | a | 43.12 | ||||||||||
1983 | 20.13 | 25.11 | a | 34.08 | 40.77 | 52.79 | 65.42 | 73.66 | 72.72 | a | 60.88 | a | 48.16 | 36.41 | a | 5.53 | a | 44.64 | ||||||||
1984 | 14.12 | a | 27.84 | 25.35 | 45.66 | a | 53.31 | 67.28 | ----- | z | 70.57 | b | 58.79 | a | 51.38 | a | 33.06 | d | 20.03 | a | 42.49 | a | ||||
1985 | 12.52 | 13.69 | a | 35.26 | d | 50.61 | c | 60.36 | m | 64.06 | e | 69.39 | 64.08 | a | 57.38 | 44.36 | b | 26.08 | e | 6.02 | c | 40.31 | a | |||
1986 | 15.47 | a | 14.65 | b | 33.04 | c | 47.41 | c | 55.71 | 65.74 | a | 68.79 | c | 61.65 | 58.47 | 45.90 | 25.75 | 19.90 | 42.71 | |||||||
1987 | 17.34 | 26.52 | 34.50 | 46.95 | 58.42 | a | 66.12 | 70.97 | 64.26 | 57.08 | 41.27 | a | ----- | z | 26.61 | c | 46.37 | a | ||||||||
1988 | 11.02 | c | 16.09 | a | 33.75 | a | ----- | z | 61.02 | a | 71.16 | a | 73.39 | ----- | z | 61.85 | 44.37 | ----- | z | ----- | z | 46.58 | d | |||
1989 | 24.89 | c | 15.10 | c | 29.05 | b | 44.34 | b | 55.63 | 65.03 | 73.11 | 69.58 | 59.62 | 51.48 | 30.35 | 11.44 | 44.14 | |||||||||
1990 | 25.95 | 21.96 | 36.98 | 46.13 | 53.77 | 67.52 | 70.16 | 69.50 | 63.15 | 48.32 | 38.92 | 15.58 | a | 46.50 | ||||||||||||
1991 | 9.85 | 23.55 | 34.18 | 48.25 | 60.15 | a | 71.22 | 70.47 | 69.98 | b | 58.28 | a | 46.50 | 25.42 | 21.27 | 44.93 | ||||||||||
1992 | 21.23 | 28.16 | 32.32 | ----- | z | 57.77 | a | 63.58 | ----- | z | 63.95 | 58.72 | 47.42 | a | 32.20 | 21.09 | b | 42.64 | b | |||||||
1993 | 13.02 | a | 15.98 | 27.38 | b | 42.10 | 55.82 | 63.55 | a | 69.47 | a | 69.15 | 54.43 | 45.73 | 31.52 | 22.68 | 42.57 | |||||||||
1994 | 5.23 | a | 11.23 | b | 33.34 | 45.47 | 56.68 | a | 68.17 | 67.58 | 65.42 | 63.10 | 50.82 | 37.36 | a | 25.07 | a | 44.12 | ||||||||
1995 | 15.58 | a | 19.87 | a | 34.00 | 40.58 | 54.71 | 68.65 | 70.79 | 74.27 | 57.30 | 47.68 | 26.11 | b | 18.77 | a | 44.03 | |||||||||
1996 | 9.07 | a | 17.02 | a | 26.02 | 40.35 | 52.94 | 66.23 | 67.85 | a | 66.85 | 58.86 | a | 48.15 | 26.02 | 15.29 | 41.22 | |||||||||
1997 | 11.50 | a | 20.33 | a | 31.00 | 42.93 | 50.72 | b | 67.55 | 69.85 | 66.52 | 61.18 | b | 48.81 | 30.02 | a | 25.73 | 43.84 | ||||||||
1998 | 19.85 | a | 30.87 | b | 31.63 | a | 47.67 | 62.58 | 64.20 | 70.48 | a | 69.67 | a | 64.48 | 50.08 | 37.04 | b | 28.23 | c | 48.06 | ||||||
1999 | 11.26 | b | 27.64 | 32.77 | 47.02 | a | 58.67 | a | 66.70 | 74.57 | b | 67.62 | a | 58.74 | a | 46.47 | a | 40.23 | 23.27 | a | 46.25 | |||||
2000 | 15.00 | 27.32 | a | 39.61 | 45.57 | 59.26 | 65.27 | 69.68 | 69.50 | 60.38 | 50.90 | a | 31.70 | 7.23 | 45.12 | |||||||||||
2001 | 18.00 | a | 12.39 | 26.85 | d | 48.77 | b | 58.18 | a | 65.90 | 71.98 | a | 72.06 | 59.33 | 47.11 | 46.67 | 28.42 | 46.31 | ||||||||
2002 | 25.53 | 28.65 | b | 27.18 | 46.28 | 55.08 | 69.30 | 74.24 | 68.97 | 62.45 | 43.32 | a | 31.78 | a | 24.46 | g | 48.43 | a | ||||||||
2003 | 19.56 | o | 15.08 | c | 32.79 | e | 45.53 | a | 55.11 | 64.78 | 70.07 | a | 71.40 | 59.04 | f | 47.73 | 32.33 | j | 26.12 | e | 47.62 | c | ||||
2004 | 12.52 | e | 20.16 | d | 36.58 | g | 46.08 | 55.77 | 63.65 | 68.27 | 63.81 | 63.57 | 48.23 | a | 36.62 | 21.74 | 45.49 | a | ||||||||
2005 | 14.73 | 26.95 | 29.37 | 49.43 | 53.48 | 70.52 | 72.10 | 68.08 | 64.23 | 50.15 | 35.30 | 15.94 | 45.86 | |||||||||||||
2006 | 28.40 | a | 19.05 | 31.81 | 50.15 | 57.13 | 66.18 | 73.74 | 69.81 | 57.29 | a | 43.66 | 36.69 | a | 27.97 | 46.82 | ||||||||||
2007 | 19.29 | 9.66 | 34.68 | 43.75 | 60.92 | 67.80 | 70.26 | 69.90 | 62.05 | 53.71 | 32.92 | 16.81 | 45.15 | |||||||||||||
2008 | 11.82 | 12.48 | 26.39 | 43.12 | 53.81 | 65.95 | a | 71.47 | 67.82 | 62.78 | 47.89 | 34.72 | 13.08 | 42.61 | ||||||||||||
2009 | 5.73 | 21.16 | 32.11 | 44.70 | 56.85 | 65.28 | 65.61 | 66.37 | 62.15 | 43.03 | 41.22 | 17.08 | 43.44 | |||||||||||||
2010 | 11.50 | a | 15.48 | 37.03 | 51.67 | a | 57.90 | 68.07 | 73.47 | a | 73.83 | a | 59.47 | 50.58 | 34.98 | 15.59 | b | 45.80 | ||||||||
2011 | 11.53 | 17.86 | 29.31 | 44.13 | 56.31 | 67.25 | 75.76 | 69.97 | 59.23 | 51.18 | 37.53 | 25.58 | 45.47 | |||||||||||||
2012 | 21.00 | 27.78 | 48.65 | 47.21 | a | 62.21 | 69.12 | 76.87 | 67.84 | 58.68 | 45.79 | 36.58 | 23.87 | a | 48.80 | |||||||||||
2013 | 16.92 | 18.18 | 24.02 | 39.50 | 55.84 | 66.02 | 70.31 | 69.18 | 62.77 | 47.73 | 31.15 | 13.76 | 42.95 | |||||||||||||
2014 | 7.06 | 6.09 | 23.44 | 42.28 | 55.53 | 68.33 | 67.03 | a | 69.77 | 60.32 | 46.35 | 25.41 | a | 24.73 | 41.36 | |||||||||||
2015 | 16.40 | 7.45 | 30.34 | 45.90 | 57.11 | 65.71 | b | 68.45 | 66.33 | b | 66.25 | 49.37 | 39.77 | 31.47 | 45.38 | |||||||||||
2016 | 14.76 | 22.40 | 37.17 | b | 46.15 | 56.31 | 67.87 | 70.50 | 69.86 | b | 63.48 | 50.79 | 41.90 | 20.31 | 46.79 | |||||||||||
2017 | 20.08 | 28.43 | 31.48 | 48.12 | 54.65 | 66.78 | 70.77 | 65.60 | 63.50 | a | 51.02 | 32.50 | 19.73 | 46.05 | ||||||||||||
2018 | 13.16 | 15.71 | 31.27 | 33.57 | 62.97 | 70.43 | 78.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | 26.65 | k | 43.59 | e | ||||||
2019 | 11.92 | 10.74 | a | 26.89 | d | 42.92 | f | 52.47 | a | 65.13 | g | 71.47 | 65.91 | c | 64.02 | e | 45.77 | e | 28.60 | e | 27.84 | o | 41.98 | c | ||
2020 | 19.70 | a | 18.46 | d | 35.72 | d | 41.81 | a | 54.02 | b | 68.57 | c | 72.02 | 68.76 | b | 58.73 | b | 40.69 | d | 38.46 | b | 25.34 | c | 45.19 | ||
2021 | 19.72 | d | 7.48 | a | 37.68 | c | 45.43 | c | 56.15 | 71.58 | 69.81 | 68.15 | 60.67 | 52.71 | 36.13 | 25.47 | a | 45.91 | ||||||||
2022 | 5.35 | 12.84 | 31.66 | 38.43 | 57.79 | 66.75 | 70.21 | 68.42 | 61.87 | 46.95 | 33.82 | 16.16 | 42.52 | |||||||||||||
2023 | 21.11 | 19.88 | 29.16 | 44.28 | 58.02 | b | 65.69 | f | 67.29 | g | 68.74 | b | 64.27 | b | 50.04 | d | 35.25 | b | 30.60 | 42.13 | b | |||||
2024 | 16.32 | 31.56 | b | 34.88 | c | 41.31 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.58 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 14.41 | 19.10 | 31.27 | 45.24 | 56.85 | 66.64 | 71.05 | 68.45 | 60.32 | 48.30 | 34.00 | 20.46 | 44.70 | |||||||||||||
S.D. | 5.85 | 6.38 | 5.07 | 3.61 | 3.24 | 2.49 | 2.66 | 2.49 | 2.52 | 3.34 | 4.22 | 5.84 | 1.71 | |||||||||||||
SKEW | -0.02 | 0.18 | 0.35 | -0.34 | 0.31 | -0.53 | 0.43 | -0.10 | 0.07 | 0.10 | -0.04 | -0.41 | 0.03 | |||||||||||||
MAX | 28.40 | 33.82 | 48.65 | 53.28 | 65.21 | 71.58 | 78.04 | 74.27 | 66.25 | 56.13 | 46.67 | 31.47 | 48.80 | |||||||||||||
MIN | 1.82 | 6.09 | 19.87 | 33.57 | 50.72 | 58.72 | 65.61 | 61.65 | 54.43 | 40.69 | 25.41 | 5.53 | 41.22 | |||||||||||||
YRS | 71 | 71 | 70 | 67 | 69 | 68 | 66 | 70 | 70 | 71 | 65 | 68 | 53 |