YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | 66.96 | g | 79.90 | 83.70 | d | 82.81 | 79.45 | a | 57.66 | b | 42.41 | a | 27.10 | 64.72 | e | |||
1953 | 23.69 | b | 26.11 | 38.16 | 48.38 | a | 65.61 | 76.78 | c | 81.62 | b | 81.24 | b | 78.35 | j | 68.10 | a | 45.57 | 27.84 | 53.01 | a | |||||
1954 | 15.00 | b | 40.32 | c | 35.00 | a | 56.36 | b | 61.93 | a | 75.03 | 85.16 | 81.90 | 68.40 | 54.84 | 48.00 | a | 31.48 | 54.45 | |||||||
1955 | 24.52 | 19.14 | 37.10 | a | 65.03 | 74.87 | 75.10 | 86.39 | 84.52 | 74.28 | a | 63.87 | 29.57 | 18.13 | 54.38 | |||||||||||
1956 | 19.90 | 21.41 | 34.10 | 49.03 | 66.94 | 82.48 | c | 79.47 | a | 80.61 | 71.90 | 68.19 | 39.28 | a | 31.68 | 53.75 | ||||||||||
1957 | 15.61 | 27.07 | 38.35 | 54.93 | 64.68 | 74.63 | 85.94 | 80.03 | 67.60 | 53.82 | c | 39.40 | 34.41 | b | 53.04 | |||||||||||
1958 | 29.68 | 24.46 | 36.06 | 55.57 | 73.23 | 71.47 | 79.13 | 86.48 | 76.30 | 64.25 | c | 41.83 | 23.29 | 55.15 | ||||||||||||
1959 | 15.14 | b | 20.25 | 43.00 | 59.10 | a | 69.00 | 82.20 | 86.00 | 88.00 | 73.79 | a | 52.03 | a | 30.72 | a | 34.06 | 54.44 | ||||||||
1960 | 20.53 | a | 21.21 | 25.23 | 52.69 | a | 68.29 | 73.72 | a | 86.10 | 83.23 | 73.38 | a | 60.34 | b | 42.66 | a | 23.67 | a | 52.59 | ||||||
1961 | 23.00 | a | 30.32 | 44.62 | b | 49.80 | 64.23 | 82.56 | c | 81.42 | 86.83 | a | 68.87 | 60.67 | a | 41.12 | f | 21.62 | b | 55.81 | a | |||||
1962 | 18.06 | 19.86 | 32.23 | a | 55.10 | a | 67.00 | a | 73.31 | a | 77.79 | b | 82.32 | c | 69.80 | 62.53 | a | 46.10 | a | 32.67 | d | 53.07 | ||||
1963 | 14.94 | 28.93 | 47.29 | 57.87 | 67.45 | 80.50 | 82.69 | b | 81.17 | b | 74.03 | 70.19 | 45.69 | a | 19.46 | c | 55.85 | |||||||||
1964 | 28.03 | a | 33.25 | a | 34.23 | a | 57.90 | a | 72.32 | 79.50 | 86.32 | f | 78.55 | 70.25 | b | 61.29 | 40.71 | b | 19.36 | c | 52.31 | a | ||||
1965 | 16.90 | a | 24.26 | a | 27.13 | 51.93 | 68.48 | 75.24 | a | 81.32 | 80.60 | a | 58.27 | 62.57 | a | 43.19 | c | 34.70 | d | 52.05 | ||||||
1966 | 10.90 | 21.32 | 44.71 | 47.83 | a | 66.23 | 77.07 | 88.39 | 77.42 | 71.40 | 60.13 | 36.77 | 29.50 | c | 52.64 | |||||||||||
1967 | 25.90 | 22.00 | 42.00 | 54.77 | 63.70 | a | 74.10 | 81.90 | 82.40 | a | 74.70 | 58.74 | 39.93 | 28.61 | c | 54.06 | ||||||||||
1968 | 22.93 | a | 25.41 | 52.10 | 57.63 | 64.52 | 78.53 | 82.29 | 83.71 | 72.20 | 59.48 | 39.30 | 20.19 | 54.86 | ||||||||||||
1969 | 12.39 | 25.04 | 28.97 | 56.77 | 70.13 | 71.82 | b | 80.74 | 86.93 | a | 77.43 | b | 51.55 | 42.93 | 27.39 | 52.67 | ||||||||||
1970 | 14.20 | a | 28.75 | 32.77 | 52.10 | 70.45 | 81.59 | a | 89.75 | c | 85.53 | a | 75.43 | 59.06 | 35.14 | a | 25.84 | 54.22 | ||||||||
1971 | 14.00 | a | 25.64 | 40.94 | 60.70 | 67.84 | 79.70 | 79.42 | 85.97 | a | 72.87 | 59.35 | 39.43 | 23.29 | 54.10 | |||||||||||
1972 | 15.94 | 19.66 | 35.45 | 51.37 | 68.63 | a | 77.72 | a | 80.97 | 81.71 | 70.90 | a | 57.13 | 35.34 | a | 17.77 | 51.05 | |||||||||
1973 | 25.84 | 31.14 | 46.00 | 55.07 | 69.77 | 79.27 | 85.37 | a | 88.16 | 69.70 | 64.65 | 38.10 | 21.26 | 56.19 | ||||||||||||
1974 | 20.32 | 28.11 | 37.68 | 56.40 | 64.42 | 79.47 | 89.68 | 81.83 | a | 74.43 | 65.43 | a | 41.77 | 31.77 | 55.94 | |||||||||||
1975 | 25.06 | 21.93 | 31.87 | 41.47 | 71.00 | a | 77.03 | 89.48 | 83.32 | 72.13 | 63.47 | a | 43.07 | 28.04 | d | 53.99 | ||||||||||
1976 | 21.06 | 36.03 | 41.48 | 62.43 | 71.13 | 84.77 | 91.65 | 90.84 | 78.31 | a | 57.17 | b | 36.57 | 24.71 | 58.01 | |||||||||||
1977 | 9.73 | a | 32.14 | 42.97 | 63.90 | 77.23 | 79.50 | 86.16 | 76.97 | 71.10 | 59.61 | 34.57 | 17.84 | 54.31 | ||||||||||||
1978 | 9.06 | 14.36 | 35.48 | 51.83 | 69.26 | 77.79 | a | 81.20 | a | 84.07 | a | 77.33 | 60.94 | 37.03 | 21.71 | 51.67 | ||||||||||
1979 | 7.94 | 13.68 | 33.26 | 46.63 | 63.19 | 76.47 | 80.94 | 77.52 | 77.53 | 58.26 | 38.00 | 37.06 | 50.87 | |||||||||||||
1980 | 22.71 | 23.62 | 34.71 | 63.40 | 74.97 | 77.93 | 85.52 | 80.71 | 73.27 | 56.65 | 46.40 | 29.23 | 55.76 | |||||||||||||
1981 | 30.71 | 33.68 | ----- | z | 64.40 | 69.23 | 75.13 | 83.55 | 82.77 | a | 74.43 | 55.76 | b | 46.32 | h | 21.95 | i | 63.29 | c | |||||||
1982 | 11.89 | m | 25.35 | b | 34.77 | 54.50 | 67.90 | 74.10 | 85.26 | 82.06 | 71.47 | 56.65 | 36.33 | 31.30 | a | 56.34 | a | |||||||||
1983 | 29.55 | 34.68 | 36.10 | b | 49.76 | a | 66.81 | 77.03 | a | 86.74 | 89.37 | a | 72.90 | 56.19 | 34.14 | b | 6.94 | 53.35 | ||||||||
1984 | 22.58 | 35.43 | f | 31.21 | b | 53.34 | a | 67.87 | 75.97 | 83.29 | 84.47 | a | 67.90 | 57.13 | 43.13 | 22.57 | a | 55.41 | a | |||||||
1985 | 20.70 | a | 25.61 | 45.71 | 63.86 | a | ----- | z | 74.93 | 85.03 | a | 75.60 | a | 64.47 | 57.26 | 26.13 | 15.55 | 50.44 | a | |||||||
1986 | 23.39 | c | 19.29 | 41.13 | a | 55.57 | 68.23 | a | 78.25 | b | 81.94 | 76.33 | a | 65.83 | 60.13 | a | 36.53 | 35.48 | 53.51 | |||||||
1987 | 31.10 | 39.70 | a | 40.97 | a | 67.97 | 74.23 | 82.10 | a | 85.13 | 79.97 | 73.43 | 56.19 | 43.67 | c | 30.25 | c | 58.73 | ||||||||
1988 | 20.00 | 24.81 | c | 42.17 | b | 62.00 | a | 77.52 | f | 87.79 | b | 88.96 | e | 85.52 | b | 72.42 | f | 56.04 | h | 38.29 | b | 31.36 | f | 56.19 | d | |
1989 | 29.07 | d | 13.48 | g | 33.06 | 55.72 | a | 69.70 | a | 76.10 | a | 87.35 | e | 80.67 | a | 71.52 | a | 62.63 | d | 37.56 | e | 18.59 | i | 60.34 | b | |
1990 | 36.07 | c | 32.96 | b | 46.07 | c | 58.83 | 68.33 | a | 77.11 | c | 81.31 | e | 80.63 | d | 76.63 | 60.82 | c | 45.70 | 24.45 | b | 57.41 | ||||
1991 | 21.06 | 35.64 | 44.77 | 59.83 | 70.07 | a | 79.45 | a | 80.28 | b | 80.97 | 69.50 | b | 58.65 | 31.83 | 31.87 | 55.33 | |||||||||
1992 | 30.74 | 34.08 | d | 44.87 | a | 52.80 | 72.71 | 73.38 | a | 71.72 | b | 75.63 | a | 71.59 | a | 59.42 | 30.40 | 23.40 | a | 53.40 | ||||||
1993 | 19.47 | a | 19.25 | 36.48 | 53.07 | a | 68.87 | 73.86 | b | 76.29 | 79.43 | a | 68.28 | a | 58.31 | b | 35.42 | d | 27.00 | d | 51.31 | |||||
1994 | 7.47 | a | 17.00 | a | 40.43 | a | 58.61 | b | 72.68 | 79.07 | a | 79.17 | a | 78.87 | a | 75.39 | b | 59.62 | e | 43.59 | a | 30.45 | b | 53.53 | ||
1995 | 22.17 | b | 26.54 | b | 39.33 | a | 46.67 | c | 65.41 | b | 78.66 | a | 82.00 | a | 83.50 | a | 72.10 | a | 55.13 | a | 33.77 | 25.89 | l | 55.03 | a | |
1996 | 15.78 | d | 25.96 | c | 29.76 | b | 50.37 | 64.85 | e | 78.86 | a | 79.69 | e | 82.26 | d | 70.34 | a | 59.52 | d | 24.68 | e | 15.35 | e | 49.78 | ||
1997 | 15.96 | e | 24.81 | a | 33.97 | b | 48.43 | b | 65.88 | e | 78.90 | i | 80.11 | d | 79.61 | h | 74.43 | i | 59.85 | e | 32.08 | f | 30.86 | b | 44.98 | d |
1998 | 21.89 | c | 34.15 | b | 33.04 | d | 57.89 | b | 72.62 | b | 72.07 | b | 83.31 | b | 83.03 | a | 79.48 | e | 57.77 | 39.78 | c | 32.50 | c | 55.63 | ||
1999 | 18.33 | a | 36.40 | c | 44.90 | a | 56.93 | b | 67.83 | a | 75.90 | a | 82.55 | 81.10 | 68.90 | 59.00 | a | 51.93 | a | 36.82 | c | 56.72 | ||||
2000 | 25.10 | a | 37.39 | a | 49.47 | a | 55.43 | 69.37 | a | 75.13 | 81.48 | 81.81 | 73.10 | a | 60.71 | 33.41 | c | 11.60 | a | 54.50 | ||||||
2001 | 26.13 | 17.48 | c | 32.32 | 52.53 | 67.77 | 75.41 | a | 84.27 | a | 83.80 | a | 71.66 | a | 57.86 | b | 51.07 | 30.81 | 54.26 | |||||||
2002 | 30.40 | a | 38.38 | b | 31.13 | a | 53.62 | a | 65.18 | c | 80.28 | a | 86.70 | a | 79.90 | b | 75.25 | b | 46.50 | a | 41.83 | 30.89 | c | 55.01 | ||
2003 | 21.93 | a | 23.15 | b | 38.73 | a | 58.53 | 65.30 | a | 74.86 | a | 82.48 | d | 85.27 | e | 72.91 | h | 62.92 | g | 36.13 | g | 30.00 | f | 56.28 | d | |
2004 | 18.96 | f | 27.54 | c | 44.40 | f | 63.00 | i | 65.96 | e | 73.65 | d | 81.83 | h | 76.07 | a | 74.16 | e | 57.80 | a | 45.97 | a | 33.17 | b | 56.79 | d |
2005 | 22.04 | e | 33.67 | a | 42.10 | 59.93 | 62.45 | i | 77.27 | 82.78 | d | 80.57 | c | 77.60 | 58.41 | b | 42.85 | d | 23.10 | 54.57 | a | |||||
2006 | 31.42 | 27.04 | 37.07 | a | 61.43 | 67.65 | 77.80 | 88.90 | 82.61 | 67.00 | 54.23 | a | 43.57 | 36.39 | 56.26 | |||||||||||
2007 | 23.74 | 17.14 | 40.19 | e | 50.10 | 71.16 | 77.83 | 83.77 | 79.77 | 73.03 | 61.00 | 41.40 | 22.42 | 53.46 | ||||||||||||
2008 | 21.48 | 25.24 | d | 36.61 | 51.00 | 66.32 | 75.54 | f | 81.23 | a | 79.94 | 71.77 | 56.84 | 39.77 | 19.65 | 49.99 | a | |||||||||
2009 | 16.37 | a | 25.50 | 34.94 | 51.27 | 68.36 | c | 73.73 | 76.39 | 76.55 | 73.13 | 45.74 | 48.53 | 18.42 | 50.74 | |||||||||||
2010 | 16.77 | 21.08 | b | 41.13 | 61.87 | 63.97 | 74.77 | 78.29 | 80.42 | 64.67 | 58.32 | 37.67 | 17.81 | 51.40 | ||||||||||||
2011 | 13.87 | 19.79 | 28.52 | 45.97 | 62.23 | 71.53 | 82.68 | 80.77 | 71.43 | 60.65 | 42.60 | 34.16 | 51.18 | |||||||||||||
2012 | 30.23 | 33.10 | 52.19 | 58.30 | 69.55 | 79.27 | 88.39 | 82.19 | 74.87 | 55.19 | 40.60 | 24.87 | 57.40 | |||||||||||||
2013 | 22.81 | 24.25 | 28.43 | a | 39.90 | 63.97 | 73.86 | b | 80.55 | 81.77 | 78.20 | 53.06 | 39.83 | 18.52 | 50.43 | |||||||||||
2014 | 19.16 | 17.79 | 36.48 | 52.47 | 66.65 | 74.60 | 77.71 | 78.21 | c | 71.30 | 60.68 | 30.53 | 26.06 | 50.97 | ||||||||||||
2015 | 25.61 | 21.43 | 44.26 | 59.17 | 65.06 | 76.73 | 82.29 | 79.39 | 77.43 | 62.16 | 46.53 | 28.77 | 55.74 | |||||||||||||
2016 | 24.16 | 31.79 | 47.87 | 55.53 | 70.35 | 80.60 | 82.13 | 81.42 | 72.10 | 60.13 | 50.87 | 19.96 | e | 56.41 | ||||||||||||
2017 | 21.84 | 35.57 | 37.39 | c | 56.70 | 67.77 | 77.63 | 86.03 | 76.81 | 73.60 | 59.06 | 41.27 | 25.58 | 54.94 | ||||||||||||
2018 | 24.58 | 20.86 | 34.45 | 43.60 | 74.94 | 79.97 | 81.19 | 80.65 | 70.93 | 50.42 | 32.33 | 30.42 | g | 53.99 | a | |||||||||||
2019 | 17.55 | 11.54 | 30.77 | 52.53 | 62.74 | 77.63 | 80.29 | 75.52 | 71.37 | 48.77 | 35.97 | 25.87 | 49.21 | |||||||||||||
2020 | 21.68 | 27.28 | 40.68 | 50.80 | 63.39 | 79.03 | 82.84 | 81.39 | 68.76 | a | 49.45 | 47.37 | 33.13 | 53.82 | ||||||||||||
2021 | 29.18 | c | 18.80 | c | 48.61 | 53.50 | 69.56 | f | 84.17 | 83.35 | 79.90 | 74.57 | 60.06 | 44.70 | 28.03 | 54.99 | a | |||||||||
2022 | 20.03 | 23.50 | 36.94 | 43.10 | 64.00 | 78.30 | 80.55 | 79.16 | 74.83 | 60.26 | 35.90 | 19.00 | 51.30 | |||||||||||||
2023 | 21.10 | 26.96 | 27.77 | 43.87 | 71.61 | 81.00 | 80.45 | 80.39 | 73.87 | 57.00 | 45.23 | 38.68 | 53.99 | |||||||||||||
2024 | 22.79 | b | 39.03 | 40.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.17 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.27 | 26.29 | 38.15 | 54.54 | 68.10 | 77.43 | 82.98 | 81.58 | 72.41 | 58.52 | 39.88 | 26.14 | 53.87 | |||||||||||||
S.D. | 6.12 | 6.80 | 6.20 | 5.91 | 3.44 | 3.28 | 3.64 | 3.31 | 3.79 | 4.52 | 5.79 | 6.71 | 2.15 | |||||||||||||
SKEW | -0.10 | 0.21 | 0.18 | -0.20 | 0.42 | 0.50 | -0.03 | 0.41 | -0.76 | -0.38 | -0.29 | -0.35 | -0.04 | |||||||||||||
MAX | 36.07 | 40.32 | 52.19 | 67.97 | 77.23 | 87.79 | 91.65 | 90.84 | 79.48 | 70.19 | 51.93 | 38.68 | 58.73 | |||||||||||||
MIN | 7.47 | 11.54 | 25.23 | 39.90 | 61.93 | 71.47 | 71.72 | 75.52 | 58.27 | 45.74 | 24.68 | 6.94 | 49.21 | |||||||||||||
YRS | 70 | 70 | 70 | 70 | 67 | 70 | 70 | 71 | 68 | 70 | 68 | 66 | 54 |