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 | ----- | 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 | 51.97 | 40.52 | 26.50 | 18.55 | 34.38 | h | ||||
1968 | 17.55 | 20.62 | 29.48 | 36.17 | 46.52 | 58.47 | 61.26 | 59.48 | 50.20 | 40.65 | 27.60 | 16.00 | 38.67 | |||||||||||||
1969 | 21.84 | 23.29 | 20.73 | a | 41.47 | 49.94 | 54.63 | 64.61 | 63.65 | 57.20 | 39.03 | 29.60 | 23.87 | 40.82 | ||||||||||||
1970 | 17.19 | 23.21 | 23.61 | 34.70 | 49.65 | 54.93 | 64.32 | 66.65 | 50.67 | 35.10 | 29.33 | 21.13 | 39.21 | |||||||||||||
1971 | 19.03 | 23.25 | 27.10 | 35.23 | 43.26 | 60.53 | 60.71 | 58.68 | 49.23 | 39.10 | 27.33 | 20.58 | 38.67 | |||||||||||||
1972 | 15.81 | 22.69 | 32.71 | 40.23 | 48.19 | 57.57 | 61.35 | 60.52 | 53.87 | 41.39 | 22.50 | 16.35 | 39.43 | |||||||||||||
1973 | 19.32 | 23.86 | 31.90 | 33.40 | 46.45 | 57.13 | 62.29 | 62.45 | 50.70 | ----- | z | 30.40 | ----- | z | 41.79 | b | ||||||||||
1974 | ----- | z | 22.36 | 30.42 | 38.97 | 47.68 | 56.47 | 62.84 | 58.06 | 47.83 | a | 43.26 | 28.37 | 17.77 | 41.27 | a | ||||||||||
1975 | 18.35 | 16.14 | 24.87 | 32.90 | 43.29 | 54.30 | 60.42 | 60.32 | 51.50 | 39.23 | 26.97 | 26.84 | 37.93 | |||||||||||||
1976 | 18.42 | 23.62 | ----- | z | ----- | z | ----- | z | 60.00 | a | 61.23 | 57.10 | 51.17 | 34.00 | 22.21 | a | 20.32 | 38.67 | c | |||||||
1977 | 11.37 | a | 19.96 | 24.60 | a | 37.69 | a | 48.10 | a | 56.41 | a | 61.74 | 57.61 | 51.52 | a | 34.67 | a | 21.43 | 16.52 | 36.80 | ||||||
1978 | 7.55 | 10.71 | 24.42 | ----- | z | 45.20 | a | 56.48 | a | 63.87 | 57.81 | 52.07 | 39.65 | 29.73 | 16.17 | a | 36.70 | a | ||||||||
1979 | 7.00 | 19.14 | 31.07 | a | 37.47 | ----- | z | ----- | z | ----- | z | 56.55 | 51.23 | 40.29 | 24.20 | 19.68 | 31.85 | c | ||||||||
1980 | 16.03 | 22.14 | 26.70 | a | 34.60 | 44.94 | 58.13 | 63.97 | 60.61 | 50.40 | 33.35 | 19.53 | 18.39 | m | 39.13 | a | ||||||||||
1981 | 17.35 | 17.43 | 31.06 | 43.77 | ----- | z | 61.53 | 63.34 | b | 61.10 | 54.00 | 42.39 | 33.23 | 21.03 | a | 40.57 | a | |||||||||
1982 | 16.45 | b | 17.15 | a | 29.61 | 35.87 | 48.90 | a | 54.63 | 63.32 | 62.81 | 54.21 | b | 40.00 | d | 25.60 | 20.89 | c | 39.12 | |||||||
1983 | 21.69 | b | 25.18 | 30.10 | 32.73 | 43.29 | 54.67 | 62.74 | 63.13 | 53.47 | 40.13 | 28.41 | a | 8.60 | a | 38.68 | ||||||||||
1984 | 13.03 | a | 22.39 | a | 25.83 | a | 32.66 | a | 48.71 | 56.55 | a | 61.10 | 62.90 | a | 50.20 | e | 38.58 | 29.57 | 23.77 | 38.77 | ||||||
1985 | 15.43 | a | 17.12 | b | 29.64 | c | 40.50 | 49.06 | 55.24 | a | 60.58 | 58.87 | 49.70 | 36.33 | a | 22.67 | 14.27 | a | 37.45 | |||||||
1986 | 20.77 | 20.29 | 31.13 | 38.03 | 46.48 | 58.93 | 63.16 | 61.41 | b | 51.86 | b | 39.50 | a | 26.40 | 20.13 | a | 39.84 | |||||||||
1987 | 18.35 | 27.21 | 26.55 | 36.47 | 49.23 | 56.10 | 61.71 | 59.50 | a | 49.97 | 36.65 | 26.57 | 19.52 | 38.98 | ||||||||||||
1988 | 14.74 | 20.52 | 25.52 | 34.70 | 47.13 | 59.13 | 60.23 | 61.03 | 49.93 | 38.90 | 28.83 | 18.60 | a | 38.27 | ||||||||||||
1989 | 19.26 | 12.89 | 27.58 | 38.17 | 48.97 | 54.03 | 60.32 | 60.19 | 50.13 | 38.55 | 27.13 | 13.48 | 37.56 | |||||||||||||
1990 | 19.58 | 21.36 | 29.19 | 37.20 | 44.68 | 59.03 | 60.65 | 59.97 | 56.27 | 38.58 | 31.23 | 13.16 | 39.24 | |||||||||||||
1991 | 17.19 | 24.25 | 28.81 | 37.00 | 50.29 | 58.37 | 60.94 | 60.74 | 51.13 | 38.06 | 24.97 | 22.39 | 39.51 | |||||||||||||
1992 | 20.97 | 26.18 | a | 30.84 | 39.50 | 47.71 | 54.00 | 59.81 | 57.23 | 51.97 | 39.97 | 24.50 | 18.55 | 39.27 | ||||||||||||
1993 | 16.74 | 18.86 | 28.48 | 35.93 | 46.81 | 56.20 | 61.90 | 60.94 | 47.63 | 37.94 | 23.13 | 20.90 | a | 37.96 | ||||||||||||
1994 | 17.61 | 16.71 | 30.32 | 36.70 | 50.16 | 60.57 | 59.48 | 61.65 | 51.83 | 40.48 | 29.30 | 23.19 | 39.83 | |||||||||||||
1995 | 21.58 | 24.89 | 28.55 | 34.27 | 43.71 | 53.60 | 59.48 | 63.45 | 51.38 | a | 37.03 | 28.47 | 21.42 | 38.99 | ||||||||||||
1996 | 14.74 | 21.36 | a | 21.10 | 37.47 | 49.19 | 58.17 | 61.74 | 60.10 | 51.90 | 39.10 | 26.60 | 19.39 | 38.40 | ||||||||||||
1997 | 16.87 | 22.37 | a | 29.73 | a | 32.07 | 45.58 | 56.13 | 62.23 | 60.94 | 54.73 | 39.68 | 25.50 | 20.16 | 38.83 | |||||||||||
1998 | 22.03 | 25.75 | 24.39 | 33.57 | 49.03 | 54.67 | 63.97 | 60.16 | 56.53 | 42.10 | a | 32.17 | a | 19.27 | a | 40.30 | ||||||||||
1999 | 21.77 | 25.57 | 28.32 | c | 36.40 | 45.68 | 55.77 | 63.26 | 61.13 | 50.97 | 36.65 | 30.79 | a | 22.90 | 39.93 | |||||||||||
2000 | 20.19 | 26.52 | 30.74 | 36.40 | 48.90 | 56.93 | a | 62.23 | 63.25 | c | 51.90 | 41.58 | 22.83 | 15.93 | a | 39.78 | ||||||||||
2001 | 16.29 | 21.15 | a | 28.97 | 39.70 | 47.77 | 56.79 | a | 65.00 | 60.45 | 51.24 | a | 38.16 | 32.07 | 20.77 | 39.86 | ||||||||||
2002 | 18.55 | 20.21 | 21.90 | 39.03 | 45.37 | a | 62.77 | 63.52 | 62.16 | 53.83 | 37.32 | 27.73 | 21.13 | 39.46 | ||||||||||||
2003 | 21.65 | 19.71 | 29.10 | 38.57 | 47.35 | 55.60 | 64.68 | 61.06 | 50.13 | 42.45 | 27.77 | 20.47 | a | 39.88 | ||||||||||||
2004 | 20.23 | 19.45 | 31.77 | 38.17 | 49.26 | 55.33 | 59.58 | 57.13 | 54.20 | 40.65 | 30.27 | 21.61 | 39.80 | |||||||||||||
2005 | 22.32 | 26.14 | 28.55 | 36.37 | 47.84 | 56.43 | 61.68 | 60.40 | a | 55.80 | 41.32 | 29.67 | 19.37 | a | 40.49 | |||||||||||
2006 | 23.74 | 16.57 | 28.16 | 40.20 | 48.94 | 59.53 | 63.65 | 62.32 | 47.80 | 38.77 | 28.77 | 20.65 | 39.92 | |||||||||||||
2007 | 10.29 | 17.25 | 33.39 | 35.07 | 47.39 | 55.40 | 61.03 | 64.03 | 54.31 | a | 40.39 | 27.13 | 16.77 | 38.54 | ||||||||||||
2008 | 16.52 | 19.69 | 28.32 | 33.23 | 45.19 | 55.60 | 63.19 | 61.32 | 51.73 | 39.19 | 30.43 | 18.32 | 38.56 | |||||||||||||
2009 | 19.68 | 23.07 | 27.42 | 35.53 | 47.74 | 57.17 | 61.26 | 58.00 | 50.90 | 35.35 | 31.33 | 14.42 | 38.49 | |||||||||||||
2010 | 16.74 | 19.96 | 28.00 | 38.70 | 44.29 | 60.60 | 63.42 | 61.68 | 54.53 | 39.97 | 26.47 | 21.97 | 39.69 | |||||||||||||
2011 | 16.00 | 15.54 | 28.42 | 36.59 | a | 44.87 | 58.10 | 65.65 | 65.61 | 51.60 | 39.45 | 29.23 | 17.32 | 39.03 | ||||||||||||
2012 | 22.87 | 22.45 | 34.16 | 40.63 | 47.74 | 60.00 | 64.71 | 59.19 | 50.47 | 37.06 | 29.93 | 20.35 | 40.80 | |||||||||||||
2013 | 18.00 | 20.86 | 27.03 | 30.63 | 45.94 | 60.03 | 62.29 | 62.19 | 57.07 | 37.16 | 25.73 | 17.55 | 38.71 | |||||||||||||
2014 | 16.35 | 18.21 | 26.26 | 37.53 | 46.06 | 57.83 | 61.06 | 61.61 | 53.77 | 42.23 | 25.50 | 21.13 | 38.96 | |||||||||||||
2015 | 19.90 | 21.14 | 29.35 | 37.67 | 45.58 | 59.87 | 63.29 | 61.45 | 56.73 | 44.97 | 27.90 | 22.65 | 40.88 | |||||||||||||
2016 | 20.13 | 25.03 | 28.42 | 38.03 | 43.87 | 59.03 | 63.39 | 60.74 | 53.47 | 41.45 | 32.20 | 14.42 | 40.02 | |||||||||||||
2017 | 18.23 | 25.68 | 31.10 | 39.70 | 45.03 | 57.80 | 63.48 | 58.06 | 53.57 | 39.06 | 31.93 | 17.97 | 40.13 | |||||||||||||
2018 | 17.55 | 18.61 | 29.55 | 33.40 | 52.13 | 61.47 | 62.48 | 59.97 | 54.57 | 39.84 | 25.70 | 19.23 | 39.54 | |||||||||||||
2019 | 21.19 | 16.11 | 26.13 | 38.20 | 44.48 | 54.50 | 62.26 | 61.23 | 58.20 | 33.39 | 24.70 | 22.00 | 38.53 | |||||||||||||
2020 | 20.68 | 20.00 | 31.55 | 35.13 | 48.00 | 59.70 | 63.77 | 60.65 | 49.43 | 35.16 | 32.43 | 21.61 | 39.84 | |||||||||||||
2021 | 20.35 | 12.93 | 29.29 | 34.47 | 47.81 | 58.43 | 62.29 | 60.58 | 54.93 | 39.32 | 31.23 | 25.26 | 39.74 | |||||||||||||
2022 | 17.06 | 15.68 | 26.52 | 36.40 | 46.97 | 59.80 | 65.71 | 61.06 | 54.07 | 40.48 | 25.33 | 18.68 | 38.98 | |||||||||||||
2023 | 18.90 | 18.86 | 26.19 | 35.77 | 51.35 | 56.27 | 62.48 | 61.71 | 54.77 | 40.19 | 29.40 | 25.13 | 40.09 | |||||||||||||
2024 | 16.32 | 28.10 | 28.39 | 35.11 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.27 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.95 | 20.83 | 28.27 | 36.68 | 47.13 | 57.41 | 62.38 | 60.76 | 52.39 | 39.03 | 27.66 | 19.46 | 39.23 | |||||||||||||
S.D. | 3.43 | 3.82 | 2.87 | 2.64 | 2.16 | 2.26 | 1.59 | 2.06 | 2.48 | 2.45 | 3.11 | 3.34 | 0.88 | |||||||||||||
SKEW | -1.14 | -0.34 | -0.57 | 0.10 | 0.01 | 0.27 | 0.07 | 0.22 | 0.32 | -0.39 | -0.39 | -0.59 | -0.38 | |||||||||||||
MAX | 23.74 | 28.10 | 34.16 | 43.77 | 52.13 | 62.77 | 65.71 | 66.65 | 58.20 | 44.97 | 33.23 | 26.84 | 40.88 | |||||||||||||
MIN | 7.00 | 10.71 | 20.73 | 30.63 | 43.26 | 53.60 | 59.48 | 56.55 | 47.63 | 33.35 | 19.53 | 8.60 | 36.80 | |||||||||||||
YRS | 56 | 57 | 56 | 54 | 53 | 55 | 55 | 56 | 57 | 56 | 57 | 55 | 49 |