YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | 66.12 | o | 79.40 | 83.06 | 78.39 | 70.90 | 68.81 | 46.17 | 17.60 | a | 63.47 | e | ||||||
1964 | 27.90 | 30.79 | 34.43 | a | 56.50 | 71.45 | 76.43 | 83.62 | b | 74.10 | 67.03 | 56.71 | 39.73 | 18.32 | 53.09 | |||||||||||
1965 | 16.87 | 20.61 | 27.81 | 49.07 | 67.00 | 73.77 | 77.68 | 76.00 | 57.23 | 58.23 | 38.40 | 29.58 | 49.35 | |||||||||||||
1966 | 9.67 | a | 23.96 | 40.10 | a | 47.07 | 62.71 | 77.23 | 83.81 | 75.06 | 69.00 | b | 56.67 | a | 35.34 | a | 23.39 | 50.33 | ||||||||
1967 | 21.55 | 19.22 | j | 36.84 | 50.30 | 61.52 | 73.63 | 77.94 | 75.71 | 71.18 | b | 55.10 | 36.38 | a | 26.19 | 53.30 | a | |||||||||
1968 | 20.71 | 23.14 | 47.19 | 55.23 | 62.90 | 74.27 | 78.67 | a | 77.83 | a | 68.41 | a | 57.83 | a | 37.83 | 21.16 | 52.10 | |||||||||
1969 | 15.13 | a | 26.54 | 33.61 | 55.27 | 67.87 | 69.55 | a | 79.65 | 84.10 | 69.93 | 51.35 | 38.43 | 25.55 | 51.42 | |||||||||||
1970 | 13.42 | 25.61 | 33.84 | 51.53 | 63.58 | 78.43 | 83.74 | 80.40 | a | 69.38 | a | 55.87 | 35.23 | 21.81 | 51.07 | |||||||||||
1971 | 11.55 | 24.71 | 33.90 | 55.53 | 65.52 | 78.80 | 76.23 | 77.45 | 69.79 | a | 59.03 | a | 36.33 | 23.93 | a | 51.07 | ||||||||||
1972 | 13.77 | 18.62 | 32.52 | 48.43 | 71.52 | 77.33 | 77.68 | 77.17 | a | 66.30 | 52.33 | a | 34.69 | a | 17.42 | 48.98 | ||||||||||
1973 | 22.68 | 26.07 | 43.84 | 52.40 | 63.10 | 75.73 | 79.52 | 79.39 | 68.40 | 61.94 | 39.13 | 23.17 | b | 52.95 | ||||||||||||
1974 | 17.58 | 25.21 | 33.26 | 53.14 | a | 61.52 | 74.00 | 83.52 | 74.32 | 64.83 | 57.94 | 39.10 | 28.35 | 51.06 | ||||||||||||
1975 | 20.77 | 24.04 | 30.47 | a | 43.00 | 70.23 | 73.10 | 82.94 | 78.16 | 65.70 | 59.58 | 43.47 | 21.97 | 51.12 | ||||||||||||
1976 | 16.00 | 31.31 | 34.29 | 59.67 | 66.63 | a | 78.90 | 82.52 | 81.81 | 71.03 | 51.55 | 32.97 | 16.13 | 51.90 | ||||||||||||
1977 | 6.13 | a | 27.11 | 42.74 | 59.52 | e | 75.83 | b | ----- | z | ----- | z | ----- | z | 64.12 | n | 57.39 | c | 36.70 | 19.23 | a | 40.58 | d | |||
1978 | 13.81 | ----- | z | 37.86 | c | 50.41 | a | 69.55 | 73.53 | 75.14 | b | 76.94 | 72.23 | 56.84 | f | 40.32 | b | 19.23 | 52.90 | b | ||||||
1979 | 8.03 | 15.11 | 32.87 | 47.23 | 58.43 | a | 73.07 | 78.74 | 73.97 | 70.21 | a | 51.00 | f | 36.33 | 28.42 | 47.49 | a | |||||||||
1980 | 17.43 | a | 23.75 | i | 37.19 | j | 58.10 | 71.94 | 73.93 | 82.03 | 76.58 | 65.10 | a | 50.00 | g | 40.23 | 22.61 | 56.44 | c | |||||||
1981 | 24.71 | 30.00 | 44.45 | 52.95 | i | 65.90 | 73.10 | 78.29 | 74.97 | a | ----- | z | ----- | z | ----- | z | ----- | z | 55.92 | e | ||||||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | 48.70 | 61.79 | b | 74.33 | 83.42 | 82.68 | 67.50 | 52.94 | 35.07 | 9.32 | 57.31 | c | ||||||||
1984 | 16.80 | a | 32.66 | 31.71 | 55.03 | 62.45 | 74.17 | 79.26 | 80.42 | 62.17 | 55.33 | a | 36.33 | 22.37 | a | 50.72 | ||||||||||
1985 | 16.50 | a | 21.50 | 39.19 | 55.40 | 68.84 | 70.37 | 78.06 | 72.10 | 63.50 | 53.94 | 27.80 | 12.87 | 48.34 | ||||||||||||
1986 | 21.55 | 21.18 | 38.52 | 54.17 | 67.26 | 74.90 | 79.35 | 73.74 | 64.40 | 53.74 | 32.03 | 27.17 | a | 50.67 | ||||||||||||
1987 | 27.85 | d | 36.11 | 44.37 | a | 62.67 | 69.81 | 79.40 | 83.26 | 76.23 | 68.83 | 49.16 | 41.67 | 27.03 | a | 55.53 | ||||||||||
1988 | 15.52 | 19.14 | 35.52 | 54.93 | 75.10 | 82.17 | a | 85.42 | 78.04 | e | 66.80 | 50.31 | b | 35.20 | 23.10 | 51.77 | ||||||||||
1989 | 24.65 | 13.07 | 30.97 | 49.93 | 65.68 | 74.28 | a | 83.55 | 78.74 | 68.00 | 55.81 | 31.97 | 14.16 | 49.23 | ||||||||||||
1990 | 28.71 | 27.54 | 39.64 | c | 52.97 | a | 62.70 | a | 74.87 | ----- | z | ----- | z | 70.00 | 51.81 | 41.33 | 20.65 | 47.02 | b | |||||||
1991 | 15.10 | 27.93 | 37.81 | 54.10 | a | 66.03 | 74.38 | d | 74.71 | 77.81 | 63.23 | 50.61 | 28.10 | 23.48 | 49.44 | |||||||||||
1992 | 23.74 | 28.79 | 35.94 | 45.13 | 66.97 | 69.17 | 69.23 | 70.23 | 65.77 | 53.30 | a | 31.78 | c | 21.90 | 48.49 | |||||||||||
1993 | 19.48 | b | 21.50 | 35.33 | a | 46.80 | 60.55 | 67.50 | 72.29 | 73.94 | 59.93 | 51.06 | 32.07 | 21.07 | a | 46.79 | ||||||||||
1994 | 6.94 | 16.22 | a | 35.58 | 47.90 | 66.58 | 75.20 | 74.52 | 72.87 | 68.71 | b | 55.32 | 41.00 | a | 28.76 | f | 50.99 | a | ||||||||
1995 | 19.17 | b | 20.86 | 36.13 | 42.40 | 61.10 | 76.53 | 75.61 | 76.77 | 65.43 | 51.45 | 27.00 | d | 19.81 | 47.69 | |||||||||||
1996 | 11.65 | 20.89 | a | 29.17 | a | 44.03 | 59.84 | 72.23 | 73.52 | 76.97 | 66.57 | 53.87 | a | 28.80 | 15.50 | a | 46.09 | |||||||||
1997 | 14.19 | 24.41 | a | 34.68 | 48.60 | 56.60 | a | 75.80 | 74.71 | 70.53 | a | 68.43 | 55.00 | 32.17 | 29.90 | 48.75 | ||||||||||
1998 | 20.97 | 35.29 | 34.13 | 57.03 | 73.00 | 70.90 | 77.86 | b | 78.13 | 72.90 | 56.68 | 40.03 | 29.00 | 53.83 | ||||||||||||
1999 | 15.45 | 32.29 | 42.38 | o | 53.89 | l | 67.55 | 73.20 | 81.16 | 74.77 | 67.23 | 57.42 | 47.43 | 28.87 | 54.54 | b | ||||||||||
2000 | 18.94 | ----- | z | 45.62 | r | 52.60 | 66.97 | a | 70.07 | 77.03 | 77.10 | 66.27 | 60.70 | d | 36.20 | 13.97 | b | 53.98 | b | |||||||
2001 | 23.06 | ----- | z | ----- | z | ----- | z | ----- | z | 71.48 | a | ----- | z | ----- | z | ----- | z | ----- | z | 41.57 | p | 30.48 | 41.68 | i | ||
2002 | 27.19 | 33.00 | 28.45 | 48.13 | 59.35 | 76.23 | 80.58 | 74.48 | 69.30 | 45.00 | 35.63 | 28.10 | 50.46 | |||||||||||||
2003 | 17.94 | 19.93 | 34.84 | 51.60 | 65.06 | 72.60 | 78.58 | 80.55 | 68.30 | 57.26 | 34.07 | 28.29 | 50.75 | |||||||||||||
2004 | 13.23 | 25.55 | 38.48 | 54.33 | 60.81 | 70.28 | a | 76.39 | 70.87 | 72.03 | 55.45 | 41.90 | 23.87 | 50.27 | ||||||||||||
2005 | 15.77 | 29.50 | 35.94 | 57.50 | 60.35 | 76.20 | 80.29 | 77.58 | 71.47 | 57.10 | 40.43 | 23.26 | 52.12 | |||||||||||||
2006 | 30.87 | 22.18 | 38.90 | 59.50 | 65.87 | 75.63 | 85.39 | 78.84 | 66.90 | 52.23 | 39.83 | 30.94 | 53.92 | |||||||||||||
2007 | 23.13 | 17.14 | 40.65 | 51.90 | 69.45 | 78.20 | 81.52 | 77.16 | 70.93 | 57.65 | 37.30 | 19.13 | 52.01 | |||||||||||||
2008 | 18.33 | a | 19.24 | 32.58 | 48.54 | b | 61.39 | 72.30 | 78.42 | 77.90 | 68.75 | b | 53.94 | 38.36 | b | 17.00 | a | 48.90 | ||||||||
2009 | 11.76 | b | 24.75 | 34.68 | 51.31 | a | 65.79 | b | 71.93 | a | 73.26 | 74.26 | 74.34 | a | 45.74 | 45.43 | b | 19.55 | 49.40 | |||||||
2010 | 17.48 | 26.21 | d | 46.32 | 61.50 | 66.32 | 72.20 | 79.97 | 79.32 | 63.20 | 60.16 | 39.79 | a | 18.68 | c | 52.60 | ||||||||||
2011 | 13.37 | a | 23.44 | a | 33.13 | h | 49.80 | 63.19 | 71.20 | 82.17 | b | 78.42 | 68.30 | 60.20 | a | 41.00 | a | 29.16 | 52.75 | a | ||||||
2012 | 23.68 | f | 31.00 | a | 51.94 | 54.63 | 67.35 | 75.21 | b | 83.57 | c | 77.84 | 69.76 | a | 53.17 | a | 39.21 | a | 21.59 | i | 60.37 | b | ||||
2013 | 17.09 | h | 22.68 | 31.65 | 39.64 | p | 62.83 | a | 71.63 | 79.10 | a | 80.13 | 72.11 | c | 52.26 | 35.52 | a | 13.29 | 52.12 | b | ||||||
2014 | 12.68 | f | 14.11 | 28.39 | 45.41 | a | 63.42 | 74.31 | a | 76.74 | 76.03 | b | 67.89 | c | 53.71 | c | 29.03 | a | 24.32 | f | 52.91 | b | ||||
2015 | 26.00 | h | 15.57 | 39.94 | 55.66 | a | 64.84 | 74.14 | a | 78.96 | d | 75.35 | 73.70 | 56.76 | b | 46.17 | a | 30.45 | 55.59 | a | ||||||
2016 | 19.32 | 27.10 | 43.16 | 50.80 | 66.55 | 73.67 | c | 77.93 | a | 77.48 | 68.47 | 56.58 | 47.69 | d | 22.35 | 52.59 | ||||||||||
2017 | 22.37 | a | 31.11 | a | 36.94 | 54.00 | 63.71 | c | 74.70 | 78.55 | 72.53 | a | 71.73 | o | ----- | z | 34.21 | f | 20.06 | 50.44 | c | |||||
2018 | 18.39 | 19.61 | 36.97 | 42.78 | c | 72.97 | 75.10 | 79.94 | 77.83 | a | 67.70 | 47.42 | 29.10 | 27.03 | 49.57 | |||||||||||
2019 | 14.39 | 16.04 | 32.84 | 49.13 | 59.58 | 75.41 | a | 80.87 | 75.68 | 68.53 | 49.60 | a | 30.83 | 24.45 | 48.11 | |||||||||||
2020 | 21.45 | b | 26.14 | 38.77 | 49.70 | c | 62.87 | a | 78.23 | 81.97 | 78.61 | c | 66.03 | 46.68 | 42.46 | b | 26.83 | b | 51.65 | |||||||
2021 | 24.52 | 14.64 | 43.68 | c | 51.14 | b | 66.38 | b | 81.13 | 81.84 | 80.77 | 73.27 | 60.65 | 39.17 | 26.58 | 53.65 | ||||||||||
2022 | 13.00 | 16.75 | 35.00 | a | 42.38 | a | 64.13 | a | 75.63 | 78.30 | a | 77.34 | b | 70.85 | c | 56.35 | 38.47 | 19.90 | 49.01 | |||||||
2023 | 23.19 | 24.50 | 32.83 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.84 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.22 | 24.01 | 36.63 | 51.75 | 65.41 | 74.50 | 79.32 | 76.83 | 68.08 | 54.84 | 37.22 | 22.61 | 50.67 | |||||||||||||
S.D. | 5.60 | 5.73 | 5.10 | 4.93 | 4.22 | 2.97 | 3.48 | 2.90 | 3.34 | 4.35 | 5.03 | 5.20 | 2.06 | |||||||||||||
SKEW | 0.08 | 0.05 | 0.69 | 0.02 | 0.40 | 0.22 | -0.45 | -0.11 | -0.73 | 0.18 | -0.05 | -0.33 | 0.02 | |||||||||||||
MAX | 30.87 | 36.11 | 51.94 | 62.67 | 75.83 | 82.17 | 85.42 | 84.10 | 74.34 | 68.81 | 47.69 | 30.94 | 55.53 | |||||||||||||
MIN | 6.13 | 13.07 | 27.81 | 42.38 | 56.60 | 67.50 | 69.23 | 70.23 | 57.23 | 45.00 | 27.00 | 9.32 | 46.09 | |||||||||||||
YRS | 54 | 53 | 53 | 54 | 57 | 58 | 56 | 56 | 55 | 53 | 56 | 55 | 40 |