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 | ----- | 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 | 59.59 | m | 63.74 | 61.00 | s | 54.07 | 41.61 | 30.93 | 23.42 | 42.75 | g | |||||
1965 | 23.61 | 20.25 | 22.48 | 42.00 | 49.10 | 56.63 | 62.16 | 58.72 | f | 52.89 | b | 39.77 | 35.13 | 27.48 | 39.23 | a | ||||||||||
1966 | 16.32 | 19.25 | 31.00 | 37.07 | 47.13 | 56.58 | k | 65.59 | n | 59.71 | 53.47 | 39.65 | 32.13 | 17.81 | 35.35 | b | ||||||||||
1967 | 22.13 | 23.21 | 33.48 | 43.53 | 45.90 | a | 57.63 | 62.87 | 58.77 | 53.37 | 42.87 | 28.83 | 21.35 | 41.16 | ||||||||||||
1968 | 23.10 | 24.14 | 31.65 | 37.23 | 46.55 | 57.30 | 61.90 | 61.87 | a | 51.33 | l | 43.58 | 32.27 | 19.87 | 39.95 | a | ||||||||||
1969 | 26.35 | 25.82 | 25.06 | 43.07 | 51.03 | 56.14 | a | 64.39 | 63.10 | 57.83 | 40.97 | 29.13 | 24.16 | 42.25 | ||||||||||||
1970 | 19.32 | 24.07 | 24.84 | 35.93 | 46.45 | 54.53 | 61.16 | 60.74 | 53.23 | 37.77 | 29.87 | 23.32 | 39.27 | |||||||||||||
1971 | 20.42 | 22.78 | a | 27.48 | 36.80 | 45.65 | 58.57 | 62.06 | 58.06 | 51.50 | 42.48 | 32.93 | 26.42 | 40.43 | ||||||||||||
1972 | 18.97 | 23.34 | 33.03 | 40.53 | 48.39 | 57.77 | 61.19 | 59.13 | 51.78 | g | 44.16 | 25.17 | 19.94 | 39.24 | a | |||||||||||
1973 | 21.29 | 25.14 | ----- | z | 33.63 | 46.68 | 55.07 | 60.52 | ----- | z | 47.11 | u | 43.06 | 31.40 | 22.13 | 37.66 | c | |||||||||
1974 | 18.84 | 24.04 | 34.74 | 41.80 | 51.65 | 57.80 | 62.29 | 57.94 | n | 49.62 | a | 45.52 | 31.23 | 20.94 | 39.86 | a | ||||||||||
1975 | 21.16 | 23.04 | 29.52 | 35.87 | 45.42 | 56.23 | 59.81 | 61.30 | h | 50.47 | 40.58 | 28.67 | 24.42 | 37.74 | a | |||||||||||
1976 | 20.13 | 29.45 | 30.68 | 41.70 | 46.58 | 57.63 | 62.00 | i | 60.06 | 53.17 | 37.52 | 26.13 | 21.26 | 38.57 | a | |||||||||||
1977 | 15.77 | 26.75 | 29.23 | 42.03 | 53.06 | 59.90 | 63.96 | f | 63.16 | 56.87 | 43.53 | a | 31.00 | 24.00 | a | 40.48 | a | |||||||||
1978 | 17.39 | 20.86 | 31.74 | 42.50 | 49.54 | c | 59.70 | ----- | z | 60.00 | 55.00 | a | 42.45 | 34.77 | 19.13 | 39.37 | a | |||||||||
1979 | 15.06 | 25.64 | 32.39 | h | 40.40 | 47.00 | 56.07 | 62.00 | i | 58.39 | h | 53.50 | 42.58 | 26.50 | 23.39 | 36.68 | c | |||||||||
1980 | 22.06 | 25.48 | 26.81 | 33.47 | 48.30 | a | 61.47 | 66.04 | d | 62.45 | 54.97 | 39.16 | f | 29.73 | 28.31 | b | 41.74 | a | ||||||||
1981 | 23.00 | g | 24.39 | 33.15 | e | 46.27 | 49.16 | f | 60.47 | 63.81 | 60.12 | g | 54.60 | e | 44.13 | 34.40 | 24.97 | 42.91 | c | |||||||
1982 | 21.58 | 21.93 | 31.40 | a | 37.53 | 47.61 | 54.40 | 61.96 | g | 62.21 | g | 54.87 | 39.32 | 28.83 | 23.71 | 36.12 | b | |||||||||
1983 | 22.84 | 25.46 | 32.55 | 33.03 | 43.43 | a | 53.63 | 62.22 | h | 63.09 | i | 55.40 | 44.83 | a | 36.85 | j | 7.00 | m | 38.90 | d | ||||||
1984 | 20.27 | a | 23.79 | 27.84 | 34.87 | 49.84 | 58.80 | 61.03 | 61.58 | 50.06 | l | 41.64 | f | 30.00 | k | 26.29 | 40.48 | c | ||||||||
1985 | 19.00 | 22.75 | 33.26 | 41.93 | 49.39 | 57.83 | 60.55 | 61.47 | l | 51.16 | e | 42.03 | 28.08 | d | 20.10 | 38.73 | a | |||||||||
1986 | 25.68 | 26.00 | 35.48 | 40.97 | 48.03 | 58.53 | 63.45 | 60.90 | 53.40 | 40.45 | 27.63 | 23.00 | a | 41.96 | ||||||||||||
1987 | 20.90 | b | 27.82 | 28.68 | 37.30 | 49.87 | 57.10 | 61.39 | 60.40 | a | 51.20 | 38.84 | 25.93 | 17.35 | 39.73 | |||||||||||
1988 | ----- | z | ----- | z | 26.61 | 34.33 | 43.73 | a | 57.77 | 59.50 | i | 60.39 | 50.90 | 40.10 | 28.52 | c | 18.90 | 40.14 | c | |||||||
1989 | 19.68 | 18.86 | 28.29 | 38.40 | 48.68 | 53.67 | 59.00 | 60.39 | 49.93 | 39.58 | 27.27 | 14.29 | 38.17 | |||||||||||||
1990 | 19.73 | a | 22.82 | 29.90 | 38.13 | 43.23 | a | 59.40 | 59.33 | g | 59.33 | d | 54.95 | h | 38.06 | 31.30 | 13.50 | a | 35.54 | b | ||||||
1991 | 18.59 | b | 25.59 | a | 29.97 | a | 38.07 | 47.37 | a | 57.25 | b | 60.48 | 60.42 | 51.59 | a | 39.26 | 26.28 | a | 22.80 | a | 39.80 | |||||
1992 | 22.19 | 27.19 | b | 31.61 | 40.43 | 48.07 | a | 53.03 | 60.26 | 58.30 | a | 52.92 | e | 41.35 | 25.13 | 21.03 | 40.13 | |||||||||
1993 | 20.13 | a | 23.36 | 30.84 | 36.83 | 48.81 | 57.13 | 63.26 | 61.19 | ----- | z | 38.77 | a | 25.40 | 22.35 | 38.92 | a | |||||||||
1994 | 18.72 | b | 21.29 | 32.90 | a | 38.69 | a | 50.40 | a | 60.66 | a | 61.52 | 62.32 | 52.90 | 40.47 | a | 29.55 | a | 25.55 | 41.25 | ||||||
1995 | 24.16 | 28.11 | 30.87 | 35.93 | 46.87 | 54.97 | 59.74 | 62.94 | 53.73 | 37.94 | 30.00 | 23.94 | 40.77 | |||||||||||||
1996 | 18.26 | 25.31 | 24.39 | 38.17 | 51.68 | 58.93 | a | 63.42 | 60.68 | 50.97 | 38.94 | 29.23 | 20.68 | 40.05 | ||||||||||||
1997 | 19.19 | 24.25 | 30.00 | 32.96 | f | 47.89 | l | 56.77 | 60.68 | 61.10 | 55.63 | 41.13 | a | 27.60 | 21.10 | 39.74 | b | |||||||||
1998 | ----- | z | 27.71 | 27.10 | 35.20 | 47.19 | 55.67 | 63.19 | 60.77 | 56.47 | 43.74 | 32.00 | 20.68 | 42.70 | a | |||||||||||
1999 | 23.10 | 26.79 | 29.77 | 36.90 | 45.84 | 56.10 | 62.94 | 61.74 | 53.13 | 38.58 | 31.43 | b | 22.71 | 40.75 | ||||||||||||
2000 | 23.10 | 27.45 | 31.58 | 38.97 | 49.61 | 58.90 | 62.90 | 63.16 | 53.00 | 43.84 | 24.57 | 17.27 | a | 41.20 | ||||||||||||
2001 | 20.48 | 25.33 | a | 30.26 | 40.03 | 48.68 | 57.60 | 64.61 | 61.42 | 52.00 | 39.29 | 35.20 | 22.74 | 41.47 | ||||||||||||
2002 | 22.23 | 21.57 | 22.13 | a | 40.80 | 46.30 | a | 60.93 | b | 63.26 | 61.35 | 54.89 | b | 39.23 | 29.87 | 20.77 | 40.28 | |||||||||
2003 | 23.83 | a | 22.64 | 30.81 | 39.00 | 49.97 | 55.03 | 63.10 | 62.00 | 51.83 | 44.00 | 30.87 | 23.65 | 41.39 | ||||||||||||
2004 | 21.17 | a | 20.03 | 34.60 | a | 39.93 | 49.61 | 56.67 | 60.90 | 57.84 | 53.07 | 42.35 | 31.20 | 23.00 | a | 40.86 | ||||||||||
2005 | 24.87 | 28.29 | 28.71 | 38.43 | 47.55 | 55.67 | 60.10 | a | 60.29 | 54.60 | 41.52 | 27.63 | 19.65 | 40.61 | ||||||||||||
2006 | 23.39 | 20.68 | c | 30.00 | 39.87 | 49.23 | 57.41 | m | 63.50 | a | 62.27 | a | 49.57 | 40.93 | a | 29.77 | 22.88 | f | 40.92 | b | ||||||
2007 | 17.03 | 21.21 | 35.21 | b | 35.21 | b | 48.65 | 55.24 | a | 61.29 | 63.77 | 56.17 | a | 44.14 | i | 27.86 | a | 20.87 | 40.23 | a | ||||||
2008 | 18.35 | 22.72 | 28.97 | 34.77 | 46.68 | 58.07 | 63.00 | 60.84 | 52.57 | 42.06 | 31.13 | 21.45 | 40.05 | |||||||||||||
2009 | 20.42 | 27.25 | 31.00 | 37.73 | 49.35 | 57.03 | 62.58 | 60.03 | 51.57 | 38.65 | 31.77 | 15.03 | b | 40.20 | ||||||||||||
2010 | 18.90 | 20.11 | 30.45 | 41.00 | 45.76 | f | 61.30 | 62.94 | 60.68 | 55.20 | 42.19 | 26.45 | a | 24.52 | 40.34 | a | ||||||||||
2011 | 17.77 | 15.71 | 30.29 | 37.60 | 45.35 | 59.63 | 65.60 | a | 66.10 | 52.67 | 40.87 | 29.43 | b | 21.03 | 40.17 | |||||||||||
2012 | 23.16 | 24.54 | a | 34.63 | a | 42.67 | 50.33 | a | 59.03 | a | 63.93 | a | 60.20 | a | 50.37 | 36.10 | a | 31.00 | 18.69 | b | 41.22 | |||||
2013 | 18.77 | 22.21 | 28.39 | 29.77 | 46.21 | b | 61.70 | c | 63.65 | 61.48 | 55.07 | 36.55 | 27.57 | 19.74 | 39.26 | |||||||||||
2014 | 14.23 | 16.54 | 24.52 | 34.90 | 47.00 | 58.63 | 62.68 | 59.81 | 54.60 | 43.26 | 25.00 | 21.52 | 38.56 | |||||||||||||
2015 | 22.35 | 23.39 | 32.00 | 37.07 | 45.65 | 59.07 | 62.87 | 59.71 | 55.67 | 46.03 | 28.00 | 23.71 | 41.29 | |||||||||||||
2016 | 22.74 | 27.17 | 31.97 | 39.13 | 45.06 | 58.47 | 63.23 | 59.00 | 53.37 | 44.03 | 33.13 | 19.65 | 41.41 | |||||||||||||
2017 | 23.32 | 27.61 | 33.65 | 40.27 | 44.77 | 55.63 | 62.06 | 59.03 | 53.00 | 40.94 | 33.50 | 18.68 | 41.04 | |||||||||||||
2018 | 17.74 | 19.79 | 29.68 | 33.87 | 50.58 | 58.80 | 61.13 | 59.93 | a | 52.23 | 41.61 | 26.23 | 21.06 | 39.39 | ||||||||||||
2019 | 21.68 | 19.61 | 27.74 | 37.57 | 44.94 | 53.83 | 60.87 | 61.84 | 57.93 | 35.68 | 25.20 | 24.39 | 39.27 | |||||||||||||
2020 | 23.42 | 22.31 | 35.13 | 34.67 | 47.84 | 59.10 | 64.19 | 59.61 | c | 49.54 | b | 36.19 | 34.10 | 21.61 | 40.64 | |||||||||||
2021 | 22.58 | 15.04 | b | 29.94 | 34.50 | 48.84 | 58.33 | 60.90 | 59.97 | 54.43 | 40.65 | 30.50 | 26.13 | 40.15 | ||||||||||||
2022 | 17.74 | 15.79 | 25.13 | 35.67 | 46.84 | 60.23 | 65.68 | 61.68 | 55.77 | h | 42.74 | 27.23 | 18.45 | 37.93 | a | |||||||||||
2023 | 21.65 | 20.68 | 28.29 | 35.00 | 50.35 | 56.93 | 62.87 | 61.71 | 55.13 | 41.97 | 30.17 | 25.97 | 40.89 | |||||||||||||
2024 | 18.48 | 27.97 | 31.65 | 34.50 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.03 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.62 | 23.43 | 30.05 | 38.09 | 47.82 | 57.55 | 62.37 | 60.86 | 53.34 | 40.99 | 29.51 | 21.72 | 40.46 | |||||||||||||
S.D. | 2.64 | 3.37 | 3.14 | 3.17 | 2.17 | 2.12 | 1.60 | 1.57 | 2.07 | 2.45 | 2.81 | 3.08 | 0.94 | |||||||||||||
SKEW | -0.18 | -0.52 | -0.49 | 0.05 | 0.03 | -0.11 | 0.13 | 0.65 | 0.07 | -0.18 | 0.14 | -0.37 | -0.44 | |||||||||||||
MAX | 26.35 | 29.45 | 35.48 | 46.27 | 53.06 | 61.70 | 66.04 | 66.10 | 57.93 | 46.03 | 35.20 | 28.31 | 42.25 | |||||||||||||
MIN | 14.23 | 15.04 | 22.13 | 29.77 | 43.23 | 53.03 | 59.00 | 57.84 | 49.54 | 35.68 | 24.57 | 13.50 | 38.17 | |||||||||||||
YRS | 57 | 59 | 58 | 58 | 56 | 57 | 51 | 50 | 53 | 57 | 58 | 58 | 33 |