YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.30 | 49.65 | 38.13 | 30.31 | 45.85 | h | ||||
1940 | 10.82 | a | 23.68 | a | 25.83 | b | 44.95 | 57.39 | 69.17 | 75.10 | 69.06 | 65.24 | a | 54.13 | 31.65 | 25.72 | b | 46.06 | ||||||||
1941 | 21.14 | b | 18.30 | 29.16 | b | 53.47 | 65.56 | 69.64 | a | 74.60 | 73.66 | 64.38 | b | 52.47 | 38.77 | 29.37 | 49.21 | |||||||||
1942 | 20.56 | 21.02 | 36.45 | 54.45 | 57.53 | 68.40 | 72.23 | 71.34 | 59.52 | 50.60 | 35.04 | d | 17.64 | b | 47.06 | |||||||||||
1943 | 11.48 | 20.57 | 26.32 | 45.72 | 56.55 | 71.47 | 74.53 | a | 73.14 | b | 59.20 | 49.74 | b | 31.07 | b | 26.02 | b | 45.48 | ||||||||
1944 | 25.24 | d | 24.48 | b | 28.09 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.94 | i |
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 | 77.11 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.11 | k | |
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 | 47.90 | p | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 58.02 | a | 70.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.10 | j | |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.65 | ----- | z | 37.15 | 23.95 | a | 41.92 | i | ||
1970 | ----- | z | ----- | z | 31.56 | ----- | z | 62.69 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.55 | ----- | z | 43.94 | i | |||
1971 | ----- | z | ----- | z | 30.44 | ----- | z | ----- | z | 74.92 | 71.15 | 71.65 | 66.38 | 58.44 | 38.40 | a | 25.63 | a | 54.62 | d | ||||||
1972 | ----- | z | 17.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.52 | k | |
1973 | ----- | z | 25.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.18 | 23.48 | j | ||
1974 | 19.62 | c | ----- | z | ----- | z | ----- | z | ----- | z | 67.33 | a | ----- | z | ----- | z | 59.48 | 52.95 | c | ----- | z | 28.08 | 45.49 | g | ||
1975 | 18.55 | a | ----- | z | 26.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.47 | j | |
1976 | ----- | z | ----- | z | ----- | z | 52.91 | a | ----- | z | 72.29 | a | 76.62 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.28 | i |
1977 | ----- | z | 23.12 | 40.82 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.92 | ----- | z | ----- | z | ----- | z | 42.62 | i | ||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | 49.76 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.76 | k |
1981 | ----- | z | ----- | z | 38.07 | a | 52.37 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.22 | j | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.62 | 73.19 | 72.97 | 60.57 | 49.24 | 26.95 | 23.60 | b | 54.31 | e | ||||||
1992 | 23.52 | 29.50 | 33.05 | 44.52 | 60.25 | c | 66.14 | b | 67.63 | a | 68.21 | 60.87 | c | 49.72 | a | 33.81 | a | 23.33 | d | 46.71 | ||||||
1993 | 13.17 | e | 17.88 | c | 27.77 | c | 41.28 | c | 57.83 | b | 63.38 | b | 70.84 | c | 71.03 | b | 56.00 | b | 48.62 | a | 33.67 | a | 24.61 | d | 43.84 | |
1994 | 5.29 | c | 14.04 | c | 33.10 | e | 46.91 | b | 59.00 | c | 70.75 | 70.20 | d | 67.73 | e | 64.98 | b | 54.17 | d | 39.55 | b | 27.91 | b | 46.14 | ||
1995 | 17.70 | d | 20.56 | a | 34.59 | d | 41.93 | b | 56.38 | c | 70.52 | c | 73.00 | d | 76.64 | b | 60.69 | f | 51.29 | c | 28.40 | a | 19.33 | d | 44.58 | a |
1996 | 10.75 | a | 21.40 | c | 24.40 | b | 42.30 | b | 55.26 | b | 67.70 | b | 70.30 | a | 71.07 | a | 63.45 | a | 50.43 | d | 27.87 | 17.50 | a | 43.53 | ||
1997 | 11.40 | b | 22.25 | 31.02 | 45.50 | b | 52.82 | c | 69.79 | b | 71.26 | f | 68.41 | c | 63.44 | e | 51.09 | b | 30.33 | d | 28.60 | 43.15 | a | |||
1998 | 21.96 | f | 33.04 | 33.23 | 50.67 | 64.32 | 66.28 | a | 73.79 | 72.59 | b | 68.48 | a | 52.46 | f | 39.62 | a | 30.53 | b | 53.25 | b | |||||
1999 | 12.90 | a | 29.90 | b | 34.95 | 50.57 | 61.15 | a | 68.34 | b | 76.50 | a | 70.52 | a | 62.48 | b | 50.39 | 42.48 | d | 25.62 | c | 48.82 | ||||
2000 | 15.96 | c | 29.65 | f | 42.12 | b | 46.46 | c | 61.95 | 66.65 | d | 72.61 | 73.02 | b | 65.33 | l | 52.37 | a | 33.45 | 8.12 | a | 47.27 | b | |||
2001 | 20.32 | 15.82 | c | 28.45 | 48.58 | 59.40 | 67.22 | 72.87 | a | 72.77 | c | 60.23 | 48.89 | 47.89 | c | 30.00 | 47.70 | |||||||||
2002 | 26.60 | 29.57 | 26.80 | a | 45.52 | 54.64 | b | 69.13 | 75.78 | a | 71.72 | b | 66.27 | d | 46.41 | b | 34.68 | 26.53 | 47.81 | |||||||
2003 | 15.69 | 16.29 | 31.65 | 47.15 | 56.63 | 66.17 | 71.80 | a | 73.42 | 61.86 | a | 50.52 | 34.22 | a | 26.85 | 46.02 | ||||||||||
2004 | 13.90 | a | 21.50 | 36.92 | a | 49.15 | 56.42 | a | 65.47 | 70.61 | 65.48 | 66.77 | b | 51.46 | c | 40.02 | b | 23.57 | a | 46.77 | ||||||
2005 | 16.27 | 27.86 | 31.37 | 51.41 | a | 55.85 | 71.92 | l | 74.11 | 71.05 | 66.73 | 53.98 | 37.97 | 19.26 | 45.99 | a | ||||||||||
2006 | 30.60 | 21.00 | 33.90 | 52.57 | 58.53 | 69.03 | 76.13 | 71.82 | 59.63 | 46.56 | 38.62 | 29.45 | 48.99 | |||||||||||||
2007 | 21.40 | 12.29 | 36.63 | 45.15 | 61.66 | 69.05 | 71.44 | 69.60 | 63.38 | 54.92 | 34.90 | 18.34 | 46.56 | |||||||||||||
2008 | 13.66 | 11.16 | 26.92 | a | 43.95 | 55.60 | 66.67 | 70.74 | 68.56 | 62.91 | a | 49.06 | 34.87 | 13.08 | a | 43.10 | ||||||||||
2009 | 6.02 | b | 22.93 | 35.07 | d | 46.79 | a | 57.72 | a | 65.88 | 66.71 | 67.95 | 64.67 | 43.88 | a | 42.57 | b | 20.11 | 45.03 | |||||||
2010 | 13.44 | 17.23 | 38.56 | 53.47 | 58.37 | 67.85 | 73.18 | 74.98 | 59.70 | 53.74 | 36.72 | 15.71 | 46.91 | |||||||||||||
2011 | 11.69 | 18.96 | 30.15 | 44.68 | 56.81 | 67.77 | 76.42 | a | 72.26 | 60.75 | 53.65 | 40.03 | 27.37 | 46.71 | ||||||||||||
2012 | 22.60 | 28.12 | 49.15 | 48.65 | 62.35 | 70.17 | a | 78.52 | 69.97 | 61.35 | 47.81 | 38.22 | a | 25.77 | 50.22 | |||||||||||
2013 | 18.06 | 18.00 | 24.89 | 39.53 | 56.52 | 66.77 | 72.55 | 71.82 | a | 65.22 | a | 48.94 | 32.82 | 14.69 | 44.15 | |||||||||||
2014 | 7.27 | 6.25 | 23.81 | 42.92 | 56.95 | 70.03 | 69.71 | 71.76 | 62.13 | 48.89 | 28.18 | 25.02 | 42.74 | |||||||||||||
2015 | 17.10 | b | 7.50 | a | 32.44 | 49.05 | 59.60 | 68.60 | 71.97 | 69.82 | 69.25 | 52.42 | 43.10 | 33.24 | 47.84 | |||||||||||
2016 | 15.26 | 23.28 | 40.16 | 47.90 | a | 59.21 | 69.98 | 73.71 | 73.68 | 66.22 | 54.23 | 45.53 | 20.37 | 49.13 | ||||||||||||
2017 | 19.47 | 29.21 | 32.72 | a | 50.15 | 57.19 | 68.78 | 72.87 | 68.55 | 66.82 | 53.45 | 34.52 | 20.29 | 47.84 | ||||||||||||
2018 | 15.71 | 16.70 | 33.39 | 36.68 | 64.95 | a | 70.77 | 73.42 | 71.90 | 65.45 | 47.06 | 30.37 | 27.06 | 46.12 | ||||||||||||
2019 | 15.47 | 12.07 | 27.24 | 45.48 | a | 55.42 | a | 67.03 | 74.45 | 69.67 | a | 66.33 | 47.79 | 30.77 | 24.97 | 44.72 | ||||||||||
2020 | 22.13 | a | 19.57 | a | 37.44 | 44.70 | 57.88 | a | 70.17 | c | 74.45 | 71.19 | b | 60.83 | 44.81 | d | 40.83 | 26.98 | b | 47.58 | ||||||
2021 | 22.90 | a | 12.12 | 40.88 | a | 48.05 | a | 58.22 | a | 73.24 | a | 72.89 | c | 71.73 | a | 65.33 | a | 57.17 | a | 37.14 | b | 26.81 | b | 48.87 | ||
2022 | 10.10 | 16.61 | a | 33.23 | 41.16 | a | 60.12 | b | 69.43 | c | 72.83 | b | 70.95 | a | 64.85 | 50.82 | 36.20 | b | 20.27 | a | 45.55 | |||||
2023 | 23.52 | 22.65 | a | 32.47 | 47.62 | b | 61.45 | c | 71.02 | a | 71.92 | a | 72.71 | 66.97 | a | 53.45 | b | 38.15 | 34.23 | 49.68 | ||||||
2024 | 22.57 | a | 36.65 | c | 38.71 | 47.71 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.64 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.92 | 20.66 | 32.80 | 47.03 | 58.64 | 68.92 | 73.04 | 71.17 | 63.55 | 50.90 | 36.15 | 23.98 | 46.67 | |||||||||||||
S.D. | 5.79 | 6.72 | 5.48 | 4.13 | 2.93 | 2.37 | 2.50 | 2.21 | 2.97 | 3.17 | 4.82 | 5.50 | 1.98 | |||||||||||||
SKEW | 0.05 | 0.10 | 0.55 | -0.23 | 0.60 | 0.27 | -0.19 | -0.17 | -0.34 | 0.05 | 0.11 | -0.66 | -0.22 | |||||||||||||
MAX | 30.60 | 36.65 | 49.15 | 54.45 | 65.56 | 74.92 | 78.52 | 76.64 | 69.25 | 58.44 | 47.89 | 34.23 | 50.22 | |||||||||||||
MIN | 5.29 | 6.25 | 23.81 | 36.68 | 52.82 | 63.38 | 66.71 | 65.48 | 56.00 | 43.88 | 26.95 | 8.12 | 42.74 | |||||||||||||
YRS | 39 | 40 | 43 | 39 | 38 | 40 | 39 | 38 | 40 | 39 | 41 | 42 | 31 |