YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.56 | v | 25.25 | c | 25.25 | k |
1940 | 7.79 | 17.86 | a | 17.97 | 32.74 | i | 49.56 | w | ----- | z | ----- | z | 57.50 | q | 60.89 | h | 46.76 | d | 23.53 | k | 17.80 | c | 21.64 | g | ||
1941 | 14.31 | d | 15.45 | g | 20.74 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.53 | j |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | 46.15 | t | 49.89 | v | 64.52 | i | 67.81 | b | 64.87 | a | 48.35 | t | 51.45 | u | ----- | z | ----- | z | 66.34 | j |
1944 | ----- | z | ----- | z | ----- | z | 35.21 | d | 62.20 | p | 63.24 | e | 64.93 | d | 65.40 | b | 53.04 | d | 40.25 | u | ----- | z | ----- | z | 56.36 | g |
1945 | ----- | z | ----- | z | ----- | z | 39.67 | d | 45.22 | b | 54.20 | o | 61.85 | k | 62.12 | g | 55.79 | i | 39.70 | k | ----- | z | ----- | z | 42.45 | j |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | 37.36 | p | 46.40 | f | 60.00 | m | 66.83 | e | 70.46 | c | 53.93 | h | 51.95 | b | ----- | z | ----- | z | 63.08 | i |
1948 | ----- | z | ----- | z | ----- | z | 41.22 | e | 48.30 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.76 | j |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.96 | d | 15.44 | e | 22.20 | j |
1971 | 4.80 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | 32.59 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.59 | k |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.32 | b | ----- | z | ----- | z | ----- | z | 55.32 | k |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.52 | k | |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.21 | 64.98 | 56.43 | a | 42.33 | a | 34.15 | 15.74 | b | 46.47 | f | |||
1991 | 7.85 | a | 18.82 | 26.97 | 43.82 | 58.29 | 67.28 | 66.22 | a | 66.84 | 53.80 | 42.27 | 25.20 | 18.21 | 41.30 | |||||||||||
1992 | 17.58 | 20.02 | 24.55 | 37.50 | e | 54.42 | 59.55 | 61.00 | 60.73 | a | 54.12 | 42.76 | 28.28 | 20.90 | b | 40.12 | ||||||||||
1993 | 13.50 | a | 14.14 | 26.97 | 36.95 | a | 51.71 | 59.63 | 66.03 | a | 66.72 | b | 50.18 | b | 40.95 | b | 26.98 | c | 19.12 | c | 39.41 | |||||
1994 | 1.23 | a | 9.52 | 27.68 | a | 39.54 | c | 53.00 | a | 64.20 | 64.97 | b | 61.15 | a | 59.77 | 46.92 | 33.88 | a | 24.41 | b | 40.52 | |||||
1995 | 15.33 | a | 14.38 | 28.82 | 34.57 | 51.08 | 67.88 | a | 67.72 | b | 69.24 | 54.34 | b | 44.54 | e | 20.91 | a | 15.68 | a | 40.37 | ||||||
1996 | 9.11 | 13.66 | d | 19.05 | c | 34.50 | 49.53 | a | 62.35 | 64.23 | 64.16 | 57.02 | a | 43.35 | 24.36 | a | 18.44 | 38.31 | ||||||||
1997 | 10.40 | 16.70 | a | 23.92 | 36.17 | 45.26 | b | 64.08 | 64.71 | 60.34 | 54.97 | 41.72 | a | 25.48 | 23.07 | a | 38.90 | |||||||||
1998 | 16.15 | 27.80 | 26.27 | 42.69 | a | 58.53 | 61.50 | a | 65.92 | a | 65.95 | a | 58.77 | 44.32 | 31.90 | 20.92 | a | 43.39 | ||||||||
1999 | 7.84 | 20.19 | a | 25.77 | a | 42.12 | 55.37 | a | 63.63 | 69.53 | 62.82 | 53.68 | 39.89 | 34.88 | 17.33 | b | 41.09 | |||||||||
2000 | 9.90 | a | 18.60 | 31.89 | 37.23 | 54.56 | 60.70 | 64.78 | a | 63.57 | a | 53.72 | 44.90 | a | 29.55 | 7.25 | a | 39.72 | ||||||||
2001 | 15.90 | 9.95 | 23.52 | b | 42.12 | 54.79 | 62.81 | a | 67.03 | 66.55 | a | 54.08 | 41.63 | 38.36 | a | 23.35 | a | 41.67 | ||||||||
2002 | 19.37 | 20.46 | 17.30 | a | 36.85 | 47.35 | 64.35 | 71.06 | 64.71 | 56.87 | 37.65 | a | 26.24 | a | 19.77 | 40.17 | ||||||||||
2003 | 8.90 | 7.23 | 22.21 | 36.17 | 50.60 | a | 61.22 | 66.50 | 66.34 | 55.97 | 42.18 | 27.48 | 20.72 | a | 38.79 | |||||||||||
2004 | 4.84 | 15.61 | a | 27.05 | 38.60 | 50.16 | 59.53 | a | 64.85 | 59.39 | 59.55 | 43.34 | 31.42 | 14.47 | 39.07 | |||||||||||
2005 | ----- | z | 19.82 | 21.02 | 43.28 | 50.10 | 69.72 | 69.39 | 66.81 | 61.88 | a | 49.26 | 34.45 | b | 20.64 | b | 46.03 | a | ||||||||
2006 | 27.28 | a | 13.43 | a | 28.10 | b | 46.27 | 55.25 | a | 64.20 | 71.32 | 66.45 | 55.73 | 41.90 | a | 35.22 | 24.38 | b | 44.13 | |||||||
2007 | 18.33 | a | 10.25 | 31.35 | 39.87 | 58.31 | 66.20 | 67.66 | 66.67 | a | 59.03 | a | 50.69 | 32.35 | 18.78 | a | 43.29 | |||||||||
2008 | 14.97 | a | 11.12 | 18.89 | 38.50 | 49.00 | 63.73 | 67.76 | 65.29 | 58.90 | 44.86 | c | 31.22 | c | 10.45 | b | 39.56 | |||||||||
2009 | 6.77 | 17.48 | a | 26.52 | b | 40.26 | e | 51.63 | d | 60.14 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.80 | f | |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | 67.06 | v | 62.57 | a | 69.45 | 67.95 | c | 53.56 | d | 47.40 | e | 32.32 | b | 16.33 | d | 49.94 | e | |
2011 | 9.56 | v | 15.91 | 22.92 | 36.16 | e | 50.38 | b | 62.10 | a | 71.07 | b | 66.15 | 55.95 | 48.03 | a | 33.57 | c | 21.15 | 43.94 | a | |||||
2012 | 16.39 | 20.91 | 40.68 | 41.53 | 57.27 | 65.40 | 71.42 | 64.66 | 54.60 | 42.76 | 31.13 | 23.32 | 44.17 | |||||||||||||
2013 | 14.06 | 12.98 | 20.69 | 34.07 | 52.79 | 61.93 | a | 68.11 | 65.26 | 58.10 | 44.88 | a | 28.42 | 7.10 | a | 39.03 | ||||||||||
2014 | 1.81 | 3.98 | 13.89 | 34.40 | 52.71 | 63.62 | 61.92 | 63.19 | 54.03 | 42.66 | 21.03 | 18.78 | a | 36.00 | ||||||||||||
2015 | 11.21 | 2.04 | 27.31 | 41.38 | 53.98 | 59.58 | 65.23 | 63.50 | 60.85 | 44.39 | 34.90 | 28.31 | 41.06 | |||||||||||||
2016 | 15.11 | 19.24 | 32.69 | 38.05 | 53.06 | 61.83 | 65.77 | 65.65 | 58.33 | 46.32 | 37.27 | 17.02 | 42.53 | |||||||||||||
2017 | 16.52 | 23.38 | 25.56 | 41.63 | 49.61 | 61.45 | 64.39 | 59.63 | 58.43 | 46.73 | 28.40 | 12.47 | 40.68 | |||||||||||||
2018 | 13.39 | 12.32 | 23.32 | 29.93 | 59.05 | 63.65 | 65.68 | 64.98 | 57.57 | 39.13 | 23.53 | 22.19 | 39.56 | |||||||||||||
2019 | 7.94 | 9.55 | 20.87 | 37.28 | 48.71 | 60.58 | 67.39 | 60.84 | 57.68 | 41.10 | 25.28 | 19.05 | 38.02 | |||||||||||||
2020 | 19.27 | 14.36 | 29.68 | 35.75 | 50.88 | a | 62.70 | 67.97 | 63.63 | 52.70 | 36.24 | 34.80 | 21.18 | 40.76 | ||||||||||||
2021 | 17.76 | 6.98 | 31.32 | 40.95 | 50.89 | 66.30 | 65.00 | 65.06 | 56.27 | 50.42 | 30.50 | 20.02 | 41.79 | |||||||||||||
2022 | 6.47 | 10.09 | 22.71 | 35.25 | 54.37 | 61.32 | 66.06 | 63.76 | 56.28 | 44.39 | 32.08 | 17.79 | 39.21 | |||||||||||||
2023 | 19.73 | 19.46 | 23.92 | 37.73 | 54.18 | 63.15 | 64.15 | a | 62.48 | 59.37 | 44.34 | 31.07 | 29.52 | 42.42 | ||||||||||||
2024 | 19.71 | 26.52 | 31.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.76 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.93 | 15.14 | 25.44 | 38.49 | 52.36 | 63.00 | 66.64 | 64.62 | 56.31 | 44.08 | 30.16 | 19.06 | 40.52 | |||||||||||||
S.D. | 5.79 | 5.95 | 5.33 | 3.43 | 3.60 | 2.48 | 2.44 | 2.55 | 2.62 | 3.54 | 4.44 | 4.93 | 1.90 | |||||||||||||
SKEW | -0.01 | -0.07 | 0.34 | -0.01 | 0.05 | 0.72 | 0.19 | -0.21 | 0.03 | 0.18 | -0.31 | -0.43 | 0.11 | |||||||||||||
MAX | 27.28 | 27.80 | 40.68 | 46.27 | 59.05 | 69.72 | 71.42 | 70.46 | 61.88 | 51.95 | 38.36 | 29.52 | 44.17 | |||||||||||||
MIN | 1.23 | 2.04 | 13.89 | 29.93 | 45.22 | 59.53 | 61.00 | 59.39 | 50.18 | 36.24 | 20.91 | 7.10 | 36.00 | |||||||||||||
YRS | 33 | 34 | 36 | 35 | 34 | 34 | 37 | 36 | 35 | 35 | 34 | 36 | 29 |