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 | ----- | 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 | 64.06 | 61.35 | 56.30 | 44.16 | 33.40 | 25.48 | 47.46 | f | ||||||
1963 | 8.39 | 24.86 | 32.45 | 42.53 | 52.97 | a | 59.40 | 65.26 | 64.74 | 59.20 | 48.13 | 30.83 | 17.58 | 42.19 | ||||||||||||
1964 | 20.10 | 20.17 | 25.84 | 40.37 | 52.71 | 59.03 | 66.48 | 65.03 | 56.77 | 41.94 | 32.97 | 21.58 | 41.92 | |||||||||||||
1965 | 23.90 | 20.11 | 21.38 | e | 42.73 | 48.74 | 56.37 | 63.06 | 62.13 | 54.13 | 40.87 | 35.33 | 27.39 | 41.35 | ||||||||||||
1966 | 14.71 | 19.86 | 30.10 | 37.57 | 47.77 | 60.37 | 69.13 | 62.00 | 54.47 | 39.84 | 32.27 | 18.93 | b | 40.58 | ||||||||||||
1967 | 21.61 | 22.54 | 35.71 | 45.90 | 47.35 | 60.27 | 64.26 | 60.42 | 53.40 | 41.68 | 28.13 | 21.06 | 41.86 | |||||||||||||
1968 | 21.84 | 21.66 | 31.97 | 39.30 | 48.13 | 60.37 | 63.52 | 62.84 | 52.03 | 43.97 | 31.53 | 18.84 | 41.33 | |||||||||||||
1969 | 25.32 | 25.75 | 25.90 | 43.83 | 52.84 | 58.10 | 66.90 | 65.61 | 58.37 | 42.03 | 28.20 | 24.65 | 43.13 | |||||||||||||
1970 | 17.48 | 26.32 | 27.06 | 38.33 | 52.10 | 57.73 | 65.23 | 63.77 | 54.70 | 39.23 | 29.70 | 23.71 | 41.28 | |||||||||||||
1971 | 19.29 | 24.00 | a | 29.26 | 40.30 | 47.84 | 61.70 | 64.26 | 60.94 | 54.53 | 44.03 | 33.50 | 26.97 | 42.22 | ||||||||||||
1972 | 19.16 | 23.14 | 34.97 | 42.70 | 51.16 | 59.93 | 63.68 | 62.90 | 57.17 | 44.48 | 26.17 | 19.71 | 42.10 | |||||||||||||
1973 | 20.97 | 25.54 | 35.48 | 37.73 | 48.03 | 59.00 | 64.19 | 62.13 | 55.03 | 43.55 | 32.37 | 22.10 | 42.18 | |||||||||||||
1974 | 17.39 | 24.46 | 34.81 | 43.03 | 53.55 | 58.93 | 65.65 | 61.94 | 49.93 | 46.19 | 31.53 | 21.06 | 42.37 | |||||||||||||
1975 | 21.48 | 22.11 | 30.13 | 39.97 | 48.87 | 58.77 | 63.45 | 62.97 | 51.70 | 41.06 | 29.97 | 25.10 | 41.30 | |||||||||||||
1976 | 19.48 | 29.41 | 30.97 | 43.90 | 47.45 | 58.87 | 63.42 | 62.03 | 55.37 | 37.94 | 25.10 | 20.65 | 41.22 | |||||||||||||
1977 | 14.19 | 26.07 | 30.80 | a | 45.53 | 55.16 | 63.40 | 67.29 | 65.32 | 58.47 | 44.29 | 30.30 | 23.80 | a | 43.72 | |||||||||||
1978 | 15.45 | 17.04 | 31.32 | 44.57 | 49.94 | 62.60 | 66.68 | 63.42 | 57.20 | 43.94 | 34.60 | 19.29 | 42.17 | |||||||||||||
1979 | 12.74 | 22.93 | 33.39 | 41.17 | 48.81 | 58.43 | 64.03 | 60.39 | 54.70 | 42.80 | a | 28.13 | 23.81 | 40.94 | ||||||||||||
1980 | 22.32 | 24.59 | 29.03 | 38.07 | 49.42 | 61.53 | 66.29 | 62.26 | 53.33 | 36.52 | 27.07 | 23.19 | 41.13 | |||||||||||||
1981 | 19.55 | 21.43 | 31.00 | 44.33 | c | 49.68 | 63.37 | 66.30 | a | 62.45 | 53.73 | 43.77 | 33.70 | 23.68 | 42.75 | |||||||||||
1982 | 18.74 | 18.69 | b | 29.81 | 39.20 | 51.00 | 58.50 | 65.27 | a | 65.19 | 57.93 | 42.23 | 29.87 | 25.23 | 41.80 | |||||||||||
1983 | 23.74 | 25.96 | a | 32.81 | 36.43 | 45.29 | c | 57.20 | 64.74 | 64.87 | 56.87 | 45.74 | 33.43 | 12.10 | 41.60 | |||||||||||
1984 | 17.93 | b | 24.59 | 29.13 | 36.55 | a | 51.58 | 61.89 | b | 63.52 | 64.17 | a | 53.70 | 44.39 | 32.24 | a | 26.87 | 42.21 | ||||||||
1985 | 19.10 | 23.43 | 36.35 | 43.70 | 52.71 | 60.10 | a | 64.29 | 63.97 | 55.83 | a | 43.81 | 29.37 | 21.45 | 42.84 | |||||||||||
1986 | 26.23 | 26.14 | 37.65 | 44.93 | 52.13 | 62.43 | 67.06 | 63.77 | a | 58.63 | 44.16 | 29.30 | 25.19 | 44.80 | ||||||||||||
1987 | 23.42 | 30.93 | 30.45 | 39.20 | 53.65 | 59.97 | 64.39 | 64.00 | a | 55.63 | 43.32 | 32.70 | 23.39 | 43.42 | ||||||||||||
1988 | 19.06 | 22.90 | 29.81 | 39.17 | a | 50.48 | 61.10 | 63.48 | 65.13 | 53.82 | b | 42.52 | 31.53 | 23.90 | 41.91 | |||||||||||
1989 | 23.10 | 19.11 | 31.42 | 43.97 | 52.04 | d | 58.04 | e | ----- | z | ----- | z | 52.43 | 40.71 | 28.43 | 14.61 | 36.39 | b | ||||||||
1990 | 21.00 | 24.64 | 31.81 | 39.70 | 48.03 | b | 62.72 | a | 64.23 | a | 63.00 | 57.97 | a | 40.74 | 32.86 | a | 16.16 | 41.91 | ||||||||
1991 | 18.68 | 26.25 | 32.27 | a | 41.67 | 52.65 | 60.86 | b | 63.97 | b | 63.29 | c | 54.03 | a | 41.62 | b | 26.43 | 25.74 | 42.29 | |||||||
1992 | 24.83 | b | 28.62 | 33.40 | a | 42.62 | a | 51.21 | c | 57.00 | a | 62.66 | b | 59.46 | c | 54.93 | a | 42.03 | a | 25.90 | 21.16 | 41.99 | ||||
1993 | 18.73 | a | 21.21 | 31.23 | a | 37.90 | 49.80 | a | 59.30 | 65.40 | a | 62.77 | a | 50.50 | 38.67 | a | 25.53 | 22.35 | 40.28 | |||||||
1994 | 18.26 | 18.11 | 30.65 | 38.57 | 51.97 | a | 63.28 | a | 62.61 | 61.47 | a | 53.07 | 43.68 | 30.41 | a | 25.61 | 41.47 | |||||||||
1995 | 22.29 | 25.86 | 30.74 | 35.07 | 45.96 | c | 56.83 | 62.13 | a | 65.68 | 54.57 | 38.07 | a | 29.30 | 22.03 | b | 40.71 | |||||||||
1996 | 16.52 | 21.59 | 23.97 | 38.38 | a | 53.06 | 60.86 | a | 63.81 | 62.13 | a | 52.90 | 41.07 | a | 28.93 | b | 18.97 | 40.18 | ||||||||
1997 | 16.87 | a | 24.00 | 29.79 | b | 34.28 | a | 48.90 | a | 57.20 | 64.45 | 62.90 | b | 57.50 | j | 41.07 | a | 27.67 | 21.97 | 39.01 | a | |||||
1998 | 23.10 | a | 27.62 | d | 27.03 | a | 35.73 | 52.50 | a | 60.28 | a | 66.48 | b | 62.73 | a | 59.41 | c | 46.13 | a | 33.48 | a | 22.23 | 43.06 | |||
1999 | 22.71 | 27.26 | a | 30.24 | b | 39.17 | 48.93 | b | 58.90 | 65.97 | b | 65.00 | c | 54.24 | a | 39.97 | a | 32.89 | c | 23.29 | 42.38 | |||||
2000 | 21.74 | 27.39 | a | 33.48 | 40.31 | a | 51.73 | a | 59.78 | c | 66.29 | c | 65.81 | 55.48 | a | 45.84 | 25.45 | a | 17.90 | 42.60 | ||||||
2001 | 21.35 | 24.36 | 30.87 | 42.24 | a | 50.52 | 61.00 | d | 68.65 | 64.37 | a | 54.86 | a | 40.94 | 37.50 | 23.45 | 43.34 | |||||||||
2002 | 19.97 | 22.00 | 24.17 | a | 43.45 | a | 48.52 | b | 64.04 | b | 66.43 | a | 64.87 | 56.47 | 41.07 | a | 30.54 | b | 22.30 | a | 41.98 | |||||
2003 | 23.39 | 20.43 | 31.69 | b | 39.50 | 50.44 | d | 57.82 | b | ----- | z | 65.39 | 53.04 | b | 45.84 | f | 29.96 | e | 23.58 | g | 41.29 | c | ||||
2004 | 18.86 | b | 20.15 | c | 35.74 | d | 39.69 | a | 53.48 | d | 59.81 | c | 62.70 | d | 59.93 | b | 55.97 | a | 43.57 | h | 34.28 | e | 21.58 | l | 44.06 | b |
2005 | 24.00 | b | 28.23 | b | 29.69 | b | 38.00 | n | 50.50 | e | 59.15 | d | 63.40 | f | 63.15 | e | 57.34 | a | 43.10 | b | 30.70 | 19.61 | 40.55 | b | ||
2006 | 23.13 | 20.07 | 32.23 | 41.40 | 51.97 | 62.34 | a | 67.10 | 65.19 | 51.97 | 42.16 | 28.70 | 23.10 | 42.45 | ||||||||||||
2007 | 16.81 | 20.30 | a | 35.26 | 37.47 | 51.35 | 57.33 | 62.23 | 66.16 | 56.87 | 43.74 | 27.03 | 20.61 | 41.26 | ||||||||||||
2008 | 18.77 | 20.41 | 29.94 | 35.73 | 49.32 | 59.37 | 65.13 | 62.77 | 53.03 | 42.19 | 32.17 | 19.55 | 40.70 | |||||||||||||
2009 | 17.65 | 25.50 | 29.71 | 38.73 | 50.23 | 60.00 | 63.23 | 62.87 | a | 52.53 | 38.45 | 33.93 | a | 16.58 | 40.78 | |||||||||||
2010 | 17.06 | 18.79 | 30.55 | 42.13 | 49.10 | 63.40 | 66.48 | 64.74 | 57.77 | 43.58 | 28.17 | 23.16 | 42.08 | |||||||||||||
2011 | 17.32 | 17.50 | 30.39 | 39.37 | 46.52 | 62.33 | 68.90 | 67.00 | 54.17 | 42.65 | 30.27 | 22.03 | 41.54 | |||||||||||||
2012 | 22.71 | 24.93 | 37.77 | 45.00 | 52.97 | 63.00 | 67.19 | 60.97 | 53.90 | 38.71 | 30.90 | 21.61 | 43.31 | |||||||||||||
2013 | 20.87 | 21.04 | 28.81 | 33.00 | 49.00 | 62.43 | 64.87 | 64.61 | 58.60 | 39.97 | 28.57 | 18.68 | 40.87 | |||||||||||||
2014 | 16.29 | 17.36 | 25.42 | 37.30 | 46.77 | a | 58.60 | 63.97 | 63.26 | 55.27 | 43.45 | 25.73 | 24.39 | 39.82 | ||||||||||||
2015 | 20.26 | 20.68 | 30.97 | 39.03 | 48.81 | 62.50 | 65.32 | 62.61 | 58.37 | 47.97 | 31.77 | 24.74 | 42.75 | |||||||||||||
2016 | 20.71 | 25.21 | 31.03 | 40.60 | 47.00 | 62.03 | 64.84 | 62.45 | 57.20 | 46.00 | 34.53 | 17.77 | 42.45 | |||||||||||||
2017 | 22.23 | 26.57 | 32.87 | 43.07 | 46.61 | 60.83 | 66.23 | 61.52 | 55.43 | 43.35 | 33.87 | 20.55 | 42.76 | |||||||||||||
2018 | 16.52 | 21.75 | 31.26 | 33.93 | 56.87 | 62.27 | 63.87 | 62.74 | 57.60 | 43.40 | a | 26.47 | 22.03 | 41.56 | ||||||||||||
2019 | 23.77 | 19.50 | 27.58 | 38.52 | a | 46.90 | 57.73 | 65.84 | 66.55 | 62.87 | 36.61 | 25.70 | 24.87 | 41.37 | ||||||||||||
2020 | 23.68 | 22.21 | a | 35.61 | 38.80 | 51.19 | 62.40 | 66.71 | 63.45 | 52.13 | 37.94 | 33.37 | 21.87 | 42.45 | ||||||||||||
2021 | 22.42 | 13.39 | 30.74 | 36.57 | 51.32 | 62.77 | 64.84 | 64.42 | 59.23 | 44.03 | 32.43 | 26.90 | 42.42 | |||||||||||||
2022 | 16.97 | 16.04 | 26.52 | 38.87 | 50.81 | 63.67 | 67.97 | 64.81 | 59.07 | 44.55 | 26.97 | 19.35 | 41.30 | |||||||||||||
2023 | 23.16 | 20.14 | 30.13 | a | 38.13 | 53.23 | a | 60.03 | 65.81 | 64.35 | 58.97 | 44.52 | 30.97 | 27.97 | 43.12 | |||||||||||
2024 | 20.19 | 29.07 | 31.55 | 41.79 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.94 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.99 | 22.93 | 30.87 | 40.02 | 50.32 | 60.32 | 65.12 | 63.41 | 55.49 | 42.41 | 30.40 | 22.00 | 41.96 | |||||||||||||
S.D. | 3.31 | 3.61 | 3.26 | 3.08 | 2.43 | 2.04 | 1.68 | 1.69 | 2.55 | 2.60 | 2.93 | 3.22 | 0.95 | |||||||||||||
SKEW | -0.74 | -0.12 | -0.30 | -0.04 | 0.11 | 0.00 | 0.37 | -0.14 | 0.23 | -0.25 | -0.03 | -0.56 | 0.23 | |||||||||||||
MAX | 26.23 | 30.93 | 37.77 | 45.90 | 56.87 | 64.04 | 69.13 | 67.00 | 62.87 | 48.13 | 37.50 | 27.97 | 44.80 | |||||||||||||
MIN | 8.39 | 13.39 | 21.38 | 33.00 | 45.29 | 56.37 | 62.13 | 59.46 | 49.93 | 36.52 | 25.10 | 12.10 | 39.82 | |||||||||||||
YRS | 62 | 62 | 62 | 60 | 61 | 61 | 59 | 61 | 61 | 60 | 62 | 60 | 56 |