YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.23 | 39.17 | 29.58 | 44.99 | i | |||
1957 | 17.00 | 28.29 | 36.94 | 53.67 | 64.00 | 72.27 | 80.68 | 76.74 | 65.47 | 56.58 | 37.00 | 28.97 | a | 51.47 | ||||||||||||
1958 | 27.03 | 22.46 | 37.81 | 55.07 | 63.52 | 69.70 | 74.71 | 75.23 | 67.87 | 57.16 | 40.53 | 20.55 | 50.97 | |||||||||||||
1959 | 16.61 | 24.43 | 38.23 | 49.67 | 69.39 | 75.57 | 78.03 | 77.55 | 67.73 | 48.87 | 29.97 | 32.48 | 50.71 | |||||||||||||
1960 | 23.68 | 27.00 | 31.13 | 49.27 | 60.94 | 72.07 | 77.39 | 76.87 | 66.80 | 56.74 | 40.97 | 25.00 | 50.65 | |||||||||||||
1961 | 21.10 | 32.82 | 39.68 | 48.13 | 63.06 | 75.50 | 76.71 | 79.29 | 68.27 | 58.13 | 39.87 | 25.27 | a | 52.32 | ||||||||||||
1962 | 18.06 | 20.04 | 38.13 | 48.03 | 68.10 | 73.43 | 75.16 | 76.00 | 62.93 | 55.61 | 39.47 | 25.29 | 50.02 | |||||||||||||
1963 | 13.16 | 18.46 | 40.39 | 54.93 | 63.90 | 75.57 | 81.74 | 75.61 | 68.77 | 69.26 | 42.80 | 21.10 | 52.14 | |||||||||||||
1964 | 28.90 | 30.31 | 32.84 | 52.97 | 69.35 | 73.40 | 81.00 | 70.97 | 64.07 | 53.23 | 42.13 | 21.58 | 51.73 | |||||||||||||
1965 | 20.29 | 21.11 | 28.39 | 47.47 | 69.06 | 71.53 | 72.50 | a | 72.87 | 59.67 | 55.77 | 37.30 | 29.29 | 48.77 | ||||||||||||
1966 | 17.55 | 25.50 | 39.39 | 45.60 | 58.77 | 76.67 | 82.29 | 71.90 | 66.37 | 53.74 | 35.03 | 25.29 | 49.84 | |||||||||||||
1967 | 23.48 | 19.18 | 37.71 | 53.00 | 57.90 | 72.10 | 74.00 | 71.45 | 67.30 | 50.29 | 32.63 | 27.74 | 48.90 | |||||||||||||
1968 | 21.03 | 21.90 | 44.23 | 53.17 | 61.03 | 70.67 | 75.55 | 75.26 | 65.83 | 57.77 | 36.23 | 25.23 | 50.66 | |||||||||||||
1969 | 22.26 | 27.57 | 33.87 | 53.97 | 66.06 | 63.97 | 76.65 | 80.42 | 65.67 | 49.48 | 38.80 | 26.90 | 50.47 | |||||||||||||
1970 | 17.90 | 25.82 | 34.52 | 51.67 | 59.26 | 76.20 | 79.65 | 78.23 | 66.97 | 59.03 | 36.80 | 26.03 | 51.01 | |||||||||||||
1971 | 15.90 | 25.46 | 34.19 | 51.17 | 61.30 | a | 76.30 | 73.58 | 73.71 | 69.27 | 60.87 | 37.73 | 27.48 | 50.58 | ||||||||||||
1972 | 19.97 | 21.14 | 30.39 | 45.87 | 71.48 | 71.53 | 75.32 | 75.16 | 63.73 | 50.97 | 36.17 | 22.26 | 48.67 | |||||||||||||
1973 | 29.42 | 26.39 | 42.61 | 50.00 | 58.32 | 74.13 | 77.90 | 77.84 | 66.67 | 62.06 | 36.00 | 25.35 | 52.23 | |||||||||||||
1974 | 20.81 | 24.82 | 35.33 | a | 53.40 | 62.39 | 71.77 | 81.48 | 73.77 | 61.03 | 55.13 | 40.30 | 31.61 | 50.99 | ||||||||||||
1975 | 24.06 | 27.43 | 33.26 | 44.17 | 71.06 | 73.30 | 81.19 | 77.29 | 62.70 | 59.58 | 43.93 | 25.94 | 51.99 | |||||||||||||
1976 | 20.06 | 34.21 | 35.74 | 54.17 | 64.29 | 80.14 | a | 80.71 | 82.81 | 70.97 | 50.68 | 32.07 | 18.68 | 52.04 | ||||||||||||
1977 | 12.74 | 26.96 | 44.16 | 57.47 | 75.67 | a | 72.67 | 80.94 | 70.61 | 64.53 | 57.58 | 39.70 | 23.90 | 52.24 | ||||||||||||
1978 | 19.67 | a | 22.29 | 36.35 | 46.33 | 68.61 | 73.20 | 75.97 | 76.94 | 70.27 | 56.10 | 40.67 | 22.77 | 50.76 | ||||||||||||
1979 | 13.84 | 20.86 | 36.94 | 48.13 | 60.35 | 72.37 | 80.61 | 74.58 | 70.40 | 48.84 | 37.20 | 30.65 | 49.56 | |||||||||||||
1980 | 22.16 | 21.72 | 33.68 | 53.07 | 71.84 | 73.83 | 80.68 | 72.84 | 62.40 | 50.13 | 37.07 | 23.81 | 50.27 | |||||||||||||
1981 | 24.35 | 30.18 | 40.03 | 55.30 | 65.48 | 74.03 | 80.26 | 77.81 | 64.83 | 51.10 | 45.50 | 27.39 | 53.02 | |||||||||||||
1982 | 15.61 | 24.11 | 34.52 | 46.93 | 71.17 | a | 68.87 | 79.13 | 73.39 | 64.17 | a | 57.00 | 37.66 | a | 30.78 | d | 50.28 | |||||||||
1983 | 25.65 | 29.69 | b | 36.00 | 46.41 | a | 59.45 | 74.30 | 83.44 | d | 80.87 | 68.30 | 54.84 | 39.07 | 17.16 | 51.27 | ||||||||||
1984 | 22.31 | b | 35.46 | c | 30.13 | 52.93 | 60.48 | 75.14 | a | 78.87 | a | 79.06 | 63.50 | 57.16 | 39.73 | 26.00 | 51.73 | |||||||||
1985 | 19.90 | 21.93 | a | 41.11 | c | 52.62 | a | 67.07 | b | 69.93 | 76.67 | d | 72.86 | b | 66.76 | a | 57.90 | a | 32.83 | 19.30 | u | 52.69 | a | |||
1986 | 23.75 | g | 25.23 | b | 42.33 | a | 58.29 | b | 69.30 | h | 74.96 | d | 79.39 | c | 72.46 | c | 65.38 | f | 54.93 | d | 34.77 | d | 31.32 | c | 52.63 | c |
1987 | 27.70 | a | 37.04 | c | 45.77 | e | 59.22 | g | 71.42 | g | 79.43 | b | 81.44 | d | 77.19 | d | 69.89 | c | 50.23 | a | 42.71 | f | 30.66 | b | 55.48 | c |
1988 | 22.62 | g | 25.12 | e | 37.40 | a | 53.46 | d | 73.48 | d | 80.19 | d | 84.38 | e | 79.45 | b | 67.12 | d | 49.14 | b | 38.41 | c | 27.40 | a | 55.96 | a |
1989 | 30.69 | b | 21.54 | 33.66 | b | 49.70 | 66.07 | a | 72.38 | a | 82.87 | 77.70 | a | 71.00 | a | 59.11 | c | 32.87 | 16.93 | b | 51.21 | |||||
1990 | 32.10 | 32.73 | b | 44.48 | b | 57.53 | 61.66 | b | 75.60 | 77.47 | a | 78.07 | c | 68.96 | e | 55.17 | g | 43.73 | 27.84 | 54.56 | a | |||||
1991 | 19.69 | b | 33.22 | a | 41.80 | a | 57.93 | a | 69.73 | a | 80.36 | b | 77.23 | 80.03 | 66.97 | a | 52.93 | a | 35.88 | d | 29.80 | a | 53.80 | |||
1992 | 26.35 | 29.86 | 35.16 | 45.86 | b | 70.10 | b | 71.03 | 70.61 | 72.71 | 66.57 | b | 52.10 | 34.57 | 27.00 | a | 50.16 | |||||||||
1993 | 22.77 | 25.59 | a | 38.10 | 46.14 | a | 61.00 | 68.55 | a | 77.03 | 78.10 | 61.30 | 48.97 | b | 34.00 | a | 27.00 | 49.05 | ||||||||
1994 | 11.26 | 18.57 | 37.48 | 48.83 | 63.13 | 75.62 | a | 75.58 | 71.90 | 69.93 | a | 58.71 | 43.67 | 34.43 | a | 50.76 | ||||||||||
1995 | 23.52 | 25.00 | a | 38.06 | 42.30 | 62.26 | 79.07 | 76.90 | 79.97 | a | 65.67 | 54.13 | a | 30.15 | c | 23.03 | a | 50.00 | ||||||||
1996 | 20.07 | a | 23.11 | b | 30.71 | 42.57 | ----- | z | 73.14 | a | 72.87 | ----- | z | 65.20 | ----- | z | ----- | z | ----- | z | 46.81 | e | ||||
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.61 | 76.17 | a | ----- | z | 38.77 | 25.55 | 54.53 | h | |||
2006 | 32.00 | 24.89 | 39.65 | ----- | z | 65.35 | ----- | z | ----- | z | 76.84 | 66.75 | b | 51.41 | b | 43.43 | b | 31.50 | u | 50.04 | d | |||||
2007 | 22.04 | h | 16.92 | c | 40.34 | b | 47.73 | ----- | z | 77.27 | 79.79 | b | 79.55 | 69.10 | 59.35 | e | 36.00 | a | 23.42 | 52.95 | b | |||||
2008 | 22.81 | 22.83 | 31.26 | d | 48.20 | 58.52 | 71.87 | 75.06 | 75.35 | 67.15 | c | 52.55 | 36.80 | 20.39 | 48.56 | |||||||||||
2009 | 15.37 | a | 25.21 | 35.32 | 47.07 | 61.16 | 69.20 | 69.10 | a | 72.29 | 72.57 | 46.29 | 46.10 | 24.10 | 48.65 | |||||||||||
2010 | 23.00 | 26.04 | 47.45 | 57.43 | 67.55 | 68.90 | 77.94 | 77.52 | 61.77 | 57.10 | 40.50 | 23.58 | 52.40 | |||||||||||||
2011 | 18.13 | 25.36 | 33.48 | 46.50 | 60.35 | 69.20 | 80.58 | 77.55 | 65.97 | 56.39 | 42.52 | g | 29.87 | a | 51.22 | a | ||||||||||
2012 | 25.61 | 30.48 | 49.65 | 52.00 | u | ----- | z | 75.20 | 80.68 | 74.90 | 64.07 | 52.87 | h | 37.33 | l | 29.45 | b | 53.75 | d | |||||||
2013 | 23.29 | 22.07 | 28.61 | 40.63 | 59.10 | 69.90 | 76.23 | 74.71 | 67.57 | 52.23 | 36.17 | g | 15.83 | m | 51.43 | b | ||||||||||
2014 | 14.86 | i | 15.04 | 25.71 | 43.50 | 60.90 | 71.60 | 72.68 | 71.77 | 65.67 | 49.58 | 29.00 | 27.81 | 48.48 | a | |||||||||||
2015 | 18.32 | 11.16 | i | 34.52 | 49.10 | 63.16 | 67.70 | ----- | z | ----- | z | 76.28 | a | 56.85 | d | 46.71 | b | 33.64 | c | 49.59 | c | |||||
2016 | 23.06 | 26.34 | 39.48 | 44.38 | a | 64.57 | c | 73.55 | a | 77.23 | a | 76.83 | a | 68.41 | a | 55.57 | a | 48.70 | c | 25.03 | 51.93 | |||||
2017 | 25.53 | a | 30.39 | 32.24 | b | 50.48 | a | 57.72 | b | 72.24 | a | 76.14 | b | 71.74 | d | 70.70 | 59.41 | d | 34.20 | 20.87 | 50.14 | |||||
2018 | 21.97 | a | 22.93 | a | 34.10 | a | 38.25 | b | 72.11 | c | 74.00 | a | 79.25 | c | 77.17 | h | 67.29 | b | 46.33 | g | 29.54 | b | 28.90 | a | 46.83 | b |
2019 | 15.76 | b | 18.93 | a | 33.33 | a | 45.60 | e | 59.07 | c | 72.04 | b | 80.29 | c | 74.24 | b | 67.10 | a | 52.07 | b | 31.69 | d | 27.60 | a | 48.14 | |
2020 | 25.21 | c | 24.74 | j | 38.13 | 43.93 | 61.19 | 75.30 | c | 80.40 | a | 75.52 | 64.47 | 46.57 | c | 43.40 | 27.21 | b | 52.85 | a | ||||||
2021 | 27.72 | b | 18.68 | 40.63 | a | 49.70 | 63.45 | b | 76.69 | a | 77.60 | a | 78.59 | b | 69.77 | 61.16 | 39.10 | 28.48 | b | 52.63 | ||||||
2022 | 13.96 | c | 17.68 | 31.03 | a | 41.93 | 64.11 | c | 73.76 | a | 76.87 | 75.27 | a | 68.17 | 55.87 | 40.17 | a | 25.29 | c | 48.68 | ||||||
2023 | 25.48 | 27.07 | 35.53 | a | 48.28 | a | 64.30 | a | 74.14 | a | 74.90 | b | 73.10 | 71.45 | a | 54.81 | e | 40.03 | a | 37.63 | a | 52.23 | ||||
2024 | 24.68 | 37.52 | 39.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.86 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.65 | 25.31 | 36.82 | 49.45 | 64.40 | 73.39 | 77.92 | 75.87 | 67.00 | 55.00 | 38.12 | 26.40 | 50.78 | |||||||||||||
S.D. | 4.93 | 5.08 | 4.83 | 4.74 | 4.60 | 3.27 | 3.25 | 2.89 | 3.31 | 4.61 | 4.50 | 4.14 | 1.37 | |||||||||||||
SKEW | 0.03 | 0.42 | 0.28 | -0.03 | 0.53 | -0.02 | -0.41 | 0.06 | 0.39 | 0.48 | 0.04 | 0.01 | -0.10 | |||||||||||||
MAX | 32.10 | 37.52 | 49.65 | 58.29 | 75.67 | 80.36 | 84.38 | 82.81 | 76.28 | 69.26 | 48.70 | 37.63 | 53.80 | |||||||||||||
MIN | 11.26 | 15.04 | 25.71 | 38.25 | 57.72 | 63.97 | 69.10 | 70.61 | 59.67 | 46.29 | 29.00 | 16.93 | 48.14 | |||||||||||||
YRS | 55 | 57 | 59 | 55 | 53 | 57 | 56 | 56 | 58 | 55 | 55 | 56 | 43 |