YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | 49.74 | k | 65.39 | 81.77 | 80.61 | 86.03 | 69.77 | 59.84 | 38.27 | 20.00 | 62.71 | d | ||||||||
1962 | 15.84 | 18.48 | a | 32.52 | 50.97 | 66.39 | 74.65 | d | 76.64 | f | 80.11 | d | 68.37 | 61.00 | 42.97 | 26.97 | b | 48.93 | a | |||||||
1963 | 11.97 | 23.82 | 43.19 | 57.13 | 64.77 | 78.57 | 84.87 | 80.39 | 72.76 | a | 69.52 | 44.67 | 17.45 | 54.09 | ||||||||||||
1964 | 25.30 | a | 30.59 | 31.77 | 55.57 | 73.23 | 78.80 | 85.16 | 76.23 | 68.53 | 58.39 | 39.48 | a | 16.33 | a | 53.28 | ||||||||||
1965 | 14.03 | 18.64 | 25.48 | 49.31 | a | 67.42 | 75.23 | 79.67 | a | 80.13 | 57.87 | 58.77 | 37.00 | 30.39 | 49.50 | |||||||||||
1966 | 7.69 | b | 20.25 | 40.23 | 45.43 | 65.42 | 78.40 | 85.29 | 76.19 | 72.67 | 58.00 | 34.40 | 23.90 | 50.66 | ||||||||||||
1967 | 20.29 | 19.19 | a | 37.06 | 52.40 | 62.10 | a | 74.43 | 82.40 | a | 80.58 | 72.97 | 55.79 | b | 37.97 | 26.19 | 51.78 | |||||||||
1968 | 18.06 | 21.24 | 47.55 | 56.60 | 64.13 | 76.40 | 80.61 | 81.42 | 71.76 | a | 58.68 | 38.31 | a | 19.59 | b | 52.86 | ||||||||||
1969 | 11.94 | 23.14 | 31.40 | a | 56.27 | 69.06 | 72.17 | 81.00 | 86.61 | 73.37 | 51.13 | 38.57 | 24.90 | 51.63 | ||||||||||||
1970 | 11.58 | 24.75 | 31.81 | 49.97 | 65.55 | 80.07 | 88.03 | 83.03 | 72.73 | 55.71 | 34.50 | 21.45 | 51.60 | |||||||||||||
1971 | 10.65 | 24.33 | a | 34.52 | 55.53 | 66.90 | 78.50 | 76.61 | 80.16 | 70.17 | 58.10 | 36.47 | 21.58 | 51.13 | ||||||||||||
1972 | 11.03 | 15.59 | 32.52 | 48.73 | 70.84 | 77.93 | 78.48 | 79.13 | a | 67.10 | 53.10 | 33.67 | 14.90 | 48.59 | ||||||||||||
1973 | 22.87 | 26.75 | 45.32 | 54.20 | 68.19 | 77.63 | 80.26 | 82.26 | 67.23 | 61.58 | 36.13 | 20.45 | 53.57 | |||||||||||||
1974 | 15.71 | 25.07 | 31.03 | a | 53.57 | 61.97 | 76.87 | 86.45 | 75.19 | 67.33 | 60.55 | 38.14 | a | 30.26 | 51.84 | |||||||||||
1975 | 21.55 | 22.07 | 30.77 | 43.60 | 70.55 | 76.27 | 85.90 | 80.16 | 67.57 | 60.03 | 40.20 | 25.94 | 52.05 | |||||||||||||
1976 | 20.13 | 33.55 | 36.39 | 61.45 | a | 70.20 | a | 81.20 | 85.68 | 86.81 | 76.17 | a | 54.52 | 32.97 | 17.33 | a | 54.70 | |||||||||
1977 | 5.37 | a | 27.25 | 42.13 | 62.00 | b | 78.29 | 77.77 | 83.42 | 73.97 | a | 67.87 | 58.10 | 34.80 | 16.03 | 52.25 | ||||||||||
1978 | 9.61 | 16.92 | b | 36.06 | 50.63 | 71.45 | 77.13 | 81.13 | 83.29 | 75.33 | 58.77 | 35.07 | 19.23 | 51.22 | ||||||||||||
1979 | 6.29 | 14.50 | 32.32 | 44.64 | b | 60.00 | 76.67 | 80.13 | 75.94 | 74.53 | 54.68 | 37.10 | 31.23 | 49.00 | ||||||||||||
1980 | 18.97 | 21.17 | 32.71 | 61.43 | 76.19 | 77.73 | 84.16 | 78.90 | 69.47 | 52.83 | a | 43.10 | 24.16 | 53.40 | ||||||||||||
1981 | 25.16 | 30.00 | 47.52 | 59.10 | 68.16 | 74.63 | 81.90 | 78.71 | 69.17 | 53.32 | 45.57 | 20.94 | 54.51 | |||||||||||||
1982 | 7.90 | a | 21.54 | b | 32.39 | 51.20 | 69.10 | 73.20 | 82.52 | 79.97 | 68.03 | 55.68 | 34.77 | 29.74 | 50.50 | |||||||||||
1983 | 24.84 | 29.71 | 37.97 | 52.93 | 66.50 | a | 76.14 | a | 85.71 | 87.23 | 70.53 | 54.61 | 36.70 | 8.93 | b | 52.65 | ||||||||||
1984 | 18.77 | 34.59 | 32.74 | 57.41 | a | 67.10 | a | 75.97 | 83.90 | 85.06 | 66.03 | 56.55 | 39.90 | 21.52 | 53.30 | |||||||||||
1985 | 17.63 | a | 22.54 | 41.97 | 59.86 | a | 73.39 | 72.20 | 81.63 | a | 74.00 | 64.03 | 56.58 | 28.21 | a | 15.69 | b | 50.64 | ||||||||
1986 | 24.26 | 21.71 | 41.74 | 57.30 | 70.87 | a | 79.17 | 81.58 | 75.43 | a | 66.30 | 58.60 | a | 34.14 | a | 31.48 | 53.55 | |||||||||
1987 | 27.74 | 37.46 | 43.35 | 67.24 | a | 73.16 | 82.47 | 84.37 | a | 78.81 | 70.87 | 52.81 | 43.20 | 28.61 | 57.51 | |||||||||||
1988 | 18.13 | 20.52 | 38.13 | 60.46 | b | 77.74 | 86.87 | 89.59 | b | 82.42 | 70.86 | a | 53.45 | 36.34 | a | 25.80 | a | 55.03 | ||||||||
1989 | 27.57 | c | 14.57 | 32.77 | 52.03 | 69.84 | 76.03 | 88.19 | 80.74 | 69.40 | 59.74 | 34.30 | 14.52 | 51.64 | ||||||||||||
1990 | 32.32 | 30.57 | 41.83 | a | 56.76 | a | 66.87 | 77.70 | 79.77 | 80.13 | 73.87 | 57.42 | 44.53 | 23.03 | 55.40 | |||||||||||
1991 | 20.20 | a | 33.33 | a | 41.60 | a | 58.60 | 70.97 | 79.27 | 79.83 | a | 83.53 | a | 67.47 | 55.94 | 31.20 | 27.19 | 54.09 | ||||||||
1992 | 27.90 | 32.28 | 41.29 | 51.93 | 72.13 | 73.90 | 73.94 | 74.74 | 69.17 | 57.32 | 32.23 | 21.48 | 52.36 | |||||||||||||
1993 | 19.03 | 22.43 | 37.10 | 54.70 | 67.13 | a | 71.17 | a | 75.39 | 76.47 | a | 64.93 | b | 56.23 | 34.20 | 25.61 | 50.37 | |||||||||
1994 | 7.13 | a | 18.29 | 39.39 | 56.20 | 71.61 | 78.87 | 77.84 | 76.71 | 73.70 | 58.42 | 42.73 | 31.26 | 52.68 | ||||||||||||
1995 | 21.84 | 24.50 | 39.42 | 49.32 | b | 66.94 | 80.73 | 80.52 | 81.10 | 69.83 | a | 52.23 | 31.37 | 22.19 | 51.66 | |||||||||||
1996 | 13.00 | 23.03 | 29.67 | a | 48.27 | 65.42 | 79.00 | 80.35 | 81.45 | 69.43 | 57.84 | 28.37 | 16.26 | 49.34 | ||||||||||||
1997 | 14.10 | 26.86 | 34.97 | 51.30 | 63.83 | a | 80.57 | 78.80 | a | 78.55 | 74.47 | 59.74 | 32.37 | 31.65 | 52.27 | |||||||||||
1998 | 21.52 | b | 36.61 | 36.52 | 62.17 | 74.52 | 73.20 | 80.58 | 83.39 | 77.07 | 58.06 | 39.43 | 30.23 | 56.11 | ||||||||||||
1999 | 18.35 | 33.50 | 41.84 | 56.97 | 69.13 | 76.17 | 82.90 | 79.81 | 66.33 | 57.42 | 50.83 | 33.16 | 55.53 | |||||||||||||
2000 | 22.16 | 33.66 | 48.10 | 56.13 | 68.45 | 72.79 | a | 80.03 | 80.03 | 70.80 | 60.06 | 36.17 | 11.60 | a | 53.33 | |||||||||||
2001 | 26.94 | 19.41 | a | 35.58 | 54.43 | 69.42 | 76.59 | a | 82.35 | 82.94 | 69.52 | a | 57.97 | 48.30 | c | 30.69 | b | 54.51 | ||||||||
2002 | 29.48 | b | 36.71 | 30.00 | b | 50.40 | 62.23 | 80.77 | 86.13 | 79.63 | a | 73.30 | 45.77 | a | 36.21 | b | 29.17 | a | 53.32 | |||||||
2003 | 13.89 | l | 20.64 | 36.30 | a | 57.69 | d | 65.69 | e | 74.62 | d | 80.74 | h | 84.13 | h | 72.50 | j | 58.48 | j | 34.38 | f | 29.65 | e | 47.43 | f | |
2004 | 14.44 | d | 23.54 | c | 39.20 | a | 55.88 | e | 61.63 | a | 71.15 | c | 77.48 | b | 71.61 | c | 74.15 | d | 56.57 | j | 40.70 | j | 31.12 | n | 54.34 | c |
2005 | 17.63 | d | 29.38 | b | 36.93 | d | 58.85 | c | 61.36 | c | 77.50 | 81.72 | b | 78.25 | c | 73.25 | f | 58.00 | c | 40.64 | h | 25.63 | l | 55.51 | c | |
2006 | 32.21 | g | 22.12 | b | 37.68 | f | 59.50 | f | 65.96 | g | 76.31 | n | 86.44 | d | 80.56 | d | 67.35 | j | 54.56 | o | 45.89 | l | 35.94 | m | 63.04 | i |
2007 | 23.77 | i | 19.20 | m | 46.05 | l | 48.26 | k | 69.44 | m | 78.79 | p | 84.70 | k | 78.31 | o | 72.50 | l | 61.26 | l | 36.67 | l | 18.76 | n | ----- | z |
2008 | 18.76 | f | 18.19 | h | 30.90 | a | 46.64 | h | 64.87 | h | 71.53 | o | 79.00 | n | 79.15 | k | 68.32 | k | 55.52 | d | 36.64 | b | 17.59 | n | 41.02 | i |
2009 | 10.00 | f | 23.54 | d | 31.76 | b | 49.66 | a | 65.72 | m | 72.95 | h | 72.80 | k | 78.21 | q | 73.70 | t | 44.96 | f | 45.59 | a | 18.19 | 33.75 | g | |
2010 | 17.40 | a | 22.73 | b | 43.59 | b | 60.72 | a | 64.03 | b | 71.31 | q | 82.46 | r | 80.88 | o | 63.48 | e | 58.85 | e | 38.63 | 18.07 | a | 43.06 | c | |
2011 | 12.13 | a | 22.46 | b | 31.63 | a | 49.80 | e | 62.50 | g | 72.59 | h | 83.23 | e | 79.95 | k | 69.50 | j | 59.60 | f | 40.11 | b | 30.80 | a | 38.60 | e |
2012 | 26.59 | b | 29.07 | b | 50.00 | b | 55.89 | c | 69.31 | e | 76.32 | e | 84.88 | g | 78.57 | h | 70.58 | d | 52.15 | e | 37.48 | c | 24.83 | b | 49.22 | b |
2013 | 19.04 | c | 20.14 | 28.97 | 40.50 | b | 63.76 | b | 72.19 | d | 80.15 | d | 80.26 | h | 72.30 | 51.84 | 34.93 | a | 10.71 | j | 48.38 | b | ||||
2014 | 12.90 | 15.19 | a | 29.00 | e | 46.61 | b | 61.79 | c | 73.52 | a | 75.77 | 76.68 | 67.54 | d | 56.31 | b | 28.73 | 26.59 | b | 47.55 | |||||
2015 | 23.12 | f | 14.73 | b | 39.41 | b | 55.66 | a | 63.70 | a | 73.96 | b | 79.52 | b | 76.97 | 74.57 | 58.20 | f | 44.10 | 29.77 | 55.24 | b | ||||
2016 | 19.58 | 28.69 | 45.39 | 51.27 | 67.90 | 75.86 | b | 78.65 | 78.42 | 69.33 | 56.04 | d | 47.72 | a | 21.61 | 53.37 | ||||||||||
2017 | 21.10 | 31.71 | 38.26 | 54.96 | g | 64.66 | b | 75.40 | 79.47 | a | 74.10 | a | 70.54 | b | 56.43 | a | 34.77 | 21.29 | 51.61 | a | ||||||
2018 | 16.71 | c | 19.67 | a | 39.08 | g | 42.67 | 73.26 | 77.14 | b | 79.20 | a | 76.67 | a | 67.24 | a | 47.32 | 28.77 | 28.59 | d | 50.66 | a | ||||
2019 | 13.08 | e | 12.78 | a | 30.87 | 52.32 | e | 59.40 | a | 74.66 | a | 79.77 | 74.62 | b | 68.93 | a | 48.26 | 31.73 | 23.45 | 47.49 | ||||||
2020 | 19.68 | 25.70 | f | 38.48 | 49.50 | 62.58 | 78.07 | a | 80.57 | a | 78.23 | 66.70 | 47.45 | 41.00 | b | 28.47 | a | 53.70 | a | |||||||
2021 | 26.17 | a | 13.68 | 44.90 | 50.80 | 66.45 | 81.63 | 82.54 | c | 79.75 | c | 73.23 | 61.03 | a | 39.30 | 24.00 | a | 53.62 | ||||||||
2022 | 13.87 | 16.50 | 35.86 | b | 40.45 | a | 64.40 | a | 76.66 | a | 79.10 | 77.16 | 72.43 | 57.68 | 36.80 | 17.63 | a | 49.04 | ||||||||
2023 | 21.97 | 24.11 | 29.97 | 45.15 | c | 70.57 | c | 79.72 | a | 77.72 | b | 78.83 | b | 73.83 | 56.04 | c | 40.38 | a | 36.00 | b | 52.86 | |||||
2024 | 19.84 | 37.10 | 40.72 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.56 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.19 | 24.32 | 37.05 | 53.41 | 67.64 | 76.91 | 81.59 | 79.44 | 70.06 | 56.39 | 37.61 | 23.82 | 52.33 | |||||||||||||
S.D. | 6.35 | 6.55 | 5.69 | 5.69 | 4.33 | 3.09 | 3.34 | 3.50 | 3.54 | 3.98 | 5.08 | 5.99 | 2.20 | |||||||||||||
SKEW | -0.02 | 0.32 | 0.28 | -0.22 | 0.35 | 0.43 | 0.22 | 0.22 | -0.58 | -0.23 | 0.38 | -0.25 | -0.20 | |||||||||||||
MAX | 32.32 | 37.46 | 50.00 | 67.24 | 78.29 | 86.87 | 89.59 | 87.23 | 77.07 | 69.52 | 50.83 | 36.00 | 57.51 | |||||||||||||
MIN | 5.37 | 12.78 | 25.48 | 40.45 | 59.40 | 71.15 | 73.94 | 71.61 | 57.87 | 45.77 | 28.21 | 8.93 | 47.49 | |||||||||||||
YRS | 57 | 60 | 60 | 58 | 58 | 57 | 56 | 55 | 56 | 56 | 58 | 57 | 46 |