YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 13.50 | 23.94 | ----- | z | 37.48 | 49.63 | 52.90 | 53.23 | 46.53 | 33.52 | 21.93 | 17.26 | 34.99 | b | ||||||||||
1947 | 15.16 | 14.86 | 21.13 | 29.77 | 39.39 | 46.07 | 52.77 | 52.87 | 44.73 | 34.77 | 15.37 | 9.71 | 31.38 | |||||||||||||
1948 | 11.06 | 13.10 | 14.71 | 33.23 | 40.55 | 47.93 | 51.97 | 51.42 | 44.47 | 29.87 | 15.17 | 15.19 | 30.72 | |||||||||||||
1949 | 9.61 | 14.11 | 22.94 | 32.27 | 41.35 | 47.00 | 53.26 | 50.52 | 44.20 | 29.94 | 24.20 | 10.48 | 31.66 | |||||||||||||
1950 | 14.06 | 17.75 | 19.03 | 30.67 | 36.94 | 49.57 | 52.87 | 48.19 | 45.77 | 37.84 | 20.47 | 16.19 | 32.45 | |||||||||||||
1951 | 10.32 | 16.57 | 19.19 | 28.57 | 39.97 | 46.93 | 54.90 | 53.39 | 42.83 | 32.48 | 17.37 | 15.65 | 31.51 | |||||||||||||
1952 | 17.68 | 17.45 | 20.65 | 31.33 | 39.35 | 52.67 | 52.68 | 54.16 | 44.90 | 31.35 | 17.73 | 13.61 | 32.80 | |||||||||||||
1953 | 18.65 | 13.96 | 24.26 | 27.80 | 37.84 | 52.07 | 55.61 | 52.19 | ----- | z | ----- | z | ----- | z | ----- | z | 35.30 | d | ||||||||
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 | 21.00 | 16.39 | 18.69 | j | ||
1956 | 17.00 | 14.72 | 20.13 | 26.97 | 42.52 | 51.23 | 52.55 | 49.97 | 44.37 | 32.68 | 17.17 | 12.81 | 31.84 | |||||||||||||
1957 | 13.39 | 23.32 | 24.35 | 27.57 | 39.74 | 46.63 | 55.77 | 53.16 | 43.33 | 38.23 | 19.10 | 18.77 | 33.61 | |||||||||||||
1958 | 13.26 | 21.29 | 23.35 | 30.10 | 43.23 | 51.97 | 53.26 | 53.84 | 48.13 | 33.81 | 20.57 | 16.77 | 34.13 | |||||||||||||
1959 | 10.87 | 18.04 | 17.94 | 29.33 | 41.00 | 48.93 | 51.13 | 53.03 | 41.63 | 31.06 | 16.57 | 17.03 | 31.38 | |||||||||||||
1960 | 7.77 | 11.59 | 22.87 | 30.43 | 37.90 | 48.47 | 53.23 | 52.13 | 46.13 | 33.74 | 22.80 | 13.84 | 31.74 | |||||||||||||
1961 | 10.42 | 17.43 | 24.16 | 28.23 | 40.74 | 49.50 | 52.45 | 54.52 | 42.03 | 30.87 | 21.80 | 11.94 | 32.01 | |||||||||||||
1962 | 8.00 | 20.50 | 16.42 | 32.73 | 39.06 | 46.30 | 52.97 | 50.71 | 46.37 | 35.61 | 23.80 | 16.39 | 32.41 | |||||||||||||
1963 | 4.45 | 18.50 | 22.19 | 33.33 | 42.58 | 49.47 | 55.81 | 55.55 | 49.10 | 38.55 | 23.30 | 10.13 | 33.58 | |||||||||||||
1964 | 9.10 | 8.24 | 17.06 | 29.87 | 41.84 | 49.53 | 55.52 | 52.77 | 46.60 | 32.26 | 24.20 | 14.13 | 31.76 | |||||||||||||
1965 | 16.58 | 10.64 | 15.16 | 31.73 | 39.29 | 46.73 | 54.19 | 50.61 | 44.17 | 32.26 | 26.03 | 16.90 | 32.03 | |||||||||||||
1966 | 8.13 | 14.75 | 21.71 | 29.43 | 40.68 | 50.07 | 57.16 | 52.39 | 45.47 | 31.94 | 24.33 | 11.90 | 32.33 | |||||||||||||
1967 | 13.03 | 14.93 | 25.77 | 33.90 | 37.52 | 49.77 | 55.55 | 50.68 | 44.50 | 32.84 | 22.40 | 9.35 | 32.52 | |||||||||||||
1968 | 13.68 | 18.17 | 21.74 | 27.47 | 39.65 | 48.60 | 52.77 | 50.87 | 41.83 | 33.03 | 22.53 | ----- | z | 33.67 | a | |||||||||||
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 | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.00 | v | 46.86 | a | 34.52 | 26.23 | 15.00 | b | 30.65 | h | ||
1999 | 19.79 | b | 17.75 | 24.55 | 29.03 | 39.35 | 47.00 | 54.33 | d | 51.61 | c | 47.42 | k | 30.37 | a | 22.24 | a | 11.77 | a | 31.62 | a | |||||
2000 | 16.80 | a | 20.28 | 25.55 | 32.23 | 40.55 | 49.53 | 53.26 | 52.87 | 43.77 | 34.19 | 18.13 | 13.03 | 33.35 | ||||||||||||
2001 | 7.77 | 16.93 | 26.06 | 31.07 | 39.70 | d | 47.23 | 54.90 | 50.26 | 44.03 | 31.68 | 24.73 | 10.77 | 32.10 | ||||||||||||
2002 | 12.19 | 10.86 | 15.77 | 32.46 | b | 38.74 | 51.43 | 53.39 | 51.58 | 45.27 | 31.29 | 21.67 | 14.03 | 31.56 | ||||||||||||
2003 | 18.61 | 17.15 | a | 22.10 | b | 31.27 | 40.71 | 47.70 | 54.69 | b | 53.16 | 43.83 | 35.23 | 22.63 | 13.97 | 33.42 | ||||||||||
2004 | 15.10 | 14.83 | 25.97 | 32.40 | 39.97 | 48.03 | 52.13 | 49.74 | 43.67 | 33.48 | 23.93 | 14.19 | 32.79 | |||||||||||||
2005 | 21.03 | a | 20.50 | 20.16 | 29.52 | a | 41.29 | 46.80 | 51.74 | 50.86 | b | 45.73 | 34.29 | 22.00 | 12.81 | 33.06 | ||||||||||
2006 | 13.77 | 12.14 | 23.03 | 32.43 | 42.19 | 51.27 | 55.32 | 54.23 | a | 41.40 | 33.17 | a | 23.93 | a | 15.54 | c | 33.20 | |||||||||
2007 | 10.80 | a | 18.32 | 25.29 | 30.57 | 41.65 | 48.33 | 54.42 | 56.00 | 48.37 | 34.23 | 22.90 | 14.97 | b | 33.82 | |||||||||||
2008 | 11.83 | a | 17.52 | 23.26 | 28.53 | 38.42 | 48.53 | 55.29 | 54.06 | 45.10 | 35.26 | 23.97 | 17.87 | 33.30 | ||||||||||||
2009 | 16.13 | 19.21 | 24.97 | 32.50 | 43.35 | 50.37 | 56.13 | 52.58 | 45.03 | 31.65 | 24.20 | 11.71 | 33.99 | |||||||||||||
2010 | 14.81 | 16.21 | 25.48 | 33.63 | 40.87 | 53.70 | 57.90 | 54.84 | 48.67 | 37.23 | 20.33 | 21.74 | 35.45 | |||||||||||||
2011 | 12.77 | 14.18 | 28.10 | 34.37 | 39.61 | 52.17 | 60.16 | 58.74 | 48.27 | 35.45 | 24.87 | 16.26 | 35.41 | |||||||||||||
2012 | 19.87 | 19.46 | a | 28.90 | 37.34 | a | 45.13 | 55.37 | 59.26 | 56.16 | 45.13 | 33.13 | 22.67 | 13.90 | 36.36 | |||||||||||
2013 | 12.03 | 17.71 | 22.77 | 28.17 | a | 40.26 | 53.73 | 57.00 | 54.13 | 50.40 | 32.63 | a | 22.66 | a | 14.84 | 33.86 | ||||||||||
2014 | 13.63 | a | 19.64 | 23.84 | 30.87 | 39.13 | 52.38 | v | 56.35 | k | 51.68 | 50.30 | 36.87 | 18.53 | 16.19 | 30.07 | b | |||||||||
2015 | 18.71 | 18.50 | 26.29 | 32.53 | 40.90 | 51.60 | 54.68 | 53.42 | 49.43 | 40.29 | 22.00 | 19.55 | b | 35.66 | ||||||||||||
2016 | 16.50 | k | 18.69 | 23.35 | 31.13 | 37.52 | 49.60 | 52.68 | c | 52.19 | 47.50 | 36.45 | 24.90 | 13.27 | a | 35.21 | a | |||||||||
2017 | 17.06 | 22.86 | 27.13 | 33.63 | 37.97 | a | 48.83 | 54.87 | 52.81 | 47.07 | 32.65 | 27.50 | 15.23 | 34.80 | ||||||||||||
2018 | 14.45 | 17.14 | 23.42 | 29.90 | 43.87 | 50.73 | 55.10 | 53.23 | 46.33 | 36.10 | 20.53 | 14.81 | 33.80 | |||||||||||||
2019 | 16.35 | 16.29 | 24.71 | 32.70 | 36.97 | 46.67 | 53.45 | 53.94 | 49.50 | 26.29 | 20.39 | b | 16.07 | b | 32.78 | |||||||||||
2020 | 18.06 | 17.17 | 26.58 | 30.03 | 43.00 | 50.00 | 55.06 | 53.03 | 41.57 | 31.32 | 25.27 | 13.58 | 33.72 | |||||||||||||
2021 | 14.55 | 14.46 | 22.69 | b | 28.13 | 42.35 | 50.97 | 56.13 | 52.65 | 47.93 | 33.68 | 24.97 | a | 19.26 | 33.98 | |||||||||||
2022 | 13.26 | 10.43 | 20.45 | 30.33 | 41.90 | 52.83 | 57.52 | 53.35 | 46.77 | 33.58 | 19.43 | 13.23 | 32.76 | |||||||||||||
2023 | 14.84 | 14.11 | 21.10 | 27.73 | 43.19 | 48.30 | 55.97 | b | 55.23 | 46.70 | 34.52 | 23.80 | 18.39 | 33.66 | ||||||||||||
2024 | 14.55 | 20.97 | 25.25 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.25 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.80 | 16.53 | 22.67 | 30.83 | 40.37 | 49.55 | 54.55 | 52.79 | 45.68 | 33.61 | 21.96 | 14.70 | 33.07 | |||||||||||||
S.D. | 3.73 | 3.33 | 3.36 | 2.23 | 1.97 | 2.25 | 1.98 | 1.93 | 2.38 | 2.60 | 2.91 | 2.72 | 1.30 | |||||||||||||
SKEW | -0.24 | -0.29 | -0.64 | 0.37 | 0.20 | 0.47 | 0.70 | 0.36 | 0.10 | 0.14 | -0.59 | 0.16 | 0.55 | |||||||||||||
MAX | 21.03 | 23.32 | 28.90 | 37.34 | 45.13 | 55.37 | 60.16 | 58.74 | 50.40 | 40.29 | 27.50 | 21.74 | 36.36 | |||||||||||||
MIN | 4.45 | 8.24 | 14.71 | 26.97 | 36.94 | 46.07 | 51.13 | 48.19 | 41.40 | 26.29 | 15.17 | 9.35 | 30.72 | |||||||||||||
YRS | 45 | 47 | 47 | 45 | 46 | 45 | 45 | 46 | 45 | 46 | 47 | 46 | 40 |