YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 21.68 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.11 | 58.20 | 42.81 | 29.05 | b | ----- | z | 48.79 | h | |||
1967 | ----- | z | ----- | z | 35.57 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.57 | k |
1968 | 22.16 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.38 | f | 60.71 | ----- | z | ----- | z | 32.64 | b | 16.73 | a | 33.06 | h | |
1969 | 6.27 | c | 21.00 | 34.53 | 43.83 | a | 57.06 | 66.25 | 66.00 | c | 64.06 | 56.97 | 41.89 | 32.87 | c | 24.00 | h | 44.61 | a | |||||||
1970 | 15.00 | 26.46 | 32.03 | b | 40.17 | a | 51.98 | 65.80 | 68.65 | 65.07 | a | 49.43 | b | 39.28 | b | 26.52 | a | 14.78 | a | 41.26 | ||||||
1971 | 19.88 | a | 25.20 | a | 24.71 | b | 38.22 | e | 50.29 | l | 52.26 | e | 65.10 | g | 67.47 | 48.48 | 37.77 | i | 26.86 | e | ----- | z | 37.89 | d | ||
1972 | 14.23 | a | 21.05 | 32.18 | 37.09 | g | 52.93 | a | 59.18 | 62.71 | b | 66.05 | 51.07 | 43.24 | b | 33.98 | d | 18.81 | 41.40 | a | ||||||
1973 | 16.53 | 26.06 | a | 37.40 | 45.05 | a | 53.35 | 58.93 | a | 68.71 | 67.71 | 57.45 | 42.50 | b | 25.52 | e | ----- | z | 45.38 | a | ||||||
1974 | 16.90 | 27.54 | 31.94 | 43.19 | a | 49.36 | c | 62.57 | 63.97 | a | 67.50 | a | 59.21 | a | 45.45 | a | 33.20 | g | 25.32 | 44.81 | a | |||||
1975 | 17.40 | e | 21.54 | b | 30.67 | b | 40.37 | 52.35 | 58.48 | a | 71.43 | c | 62.03 | a | 57.77 | b | 43.21 | 30.52 | 22.90 | b | 42.39 | |||||
1976 | 20.89 | 25.64 | 30.27 | a | 42.27 | 51.63 | a | 55.18 | 63.79 | 60.47 | 57.53 | 43.08 | 31.88 | 22.65 | 42.11 | |||||||||||
1977 | 15.11 | 30.93 | 37.71 | 49.73 | 51.00 | 64.78 | 65.79 | 70.81 | 54.45 | 42.58 | 28.97 | 19.02 | 44.24 | |||||||||||||
1978 | 22.68 | 29.02 | a | 35.74 | 44.27 | 51.23 | 61.78 | 67.87 | 64.11 | 53.95 | 44.23 | 26.97 | 16.42 | 43.19 | ||||||||||||
1979 | 8.55 | 22.68 | 36.35 | 44.78 | g | 54.89 | 62.23 | 69.97 | 67.79 | 58.92 | 47.77 | 27.13 | 28.98 | 44.12 | a | |||||||||||
1980 | 12.69 | 26.76 | 34.97 | 47.35 | 55.13 | a | 57.78 | 66.21 | 63.18 | 56.90 | 45.48 | 31.83 | 23.32 | 43.47 | ||||||||||||
1981 | 29.52 | 27.62 | 39.34 | 44.47 | 52.34 | 55.25 | 65.00 | 70.74 | 56.60 | 41.69 | 34.05 | 20.03 | 44.72 | |||||||||||||
1982 | 20.74 | 24.32 | 34.11 | 39.47 | a | 51.47 | 64.58 | 64.39 | 64.81 | 56.30 | 42.77 | a | 27.48 | a | 20.81 | 42.60 | ||||||||||
1983 | 28.28 | a | 29.96 | 37.69 | 44.78 | 55.92 | a | 59.52 | 61.31 | 67.18 | 52.37 | 44.23 | 33.68 | 10.15 | 43.76 | |||||||||||
1984 | 24.37 | 28.76 | 38.12 | a | 42.58 | 49.16 | 57.37 | 68.02 | 66.35 | 52.82 | 40.83 | a | 29.18 | 10.70 | a | 42.36 | ||||||||||
1985 | 17.82 | 20.16 | 33.61 | 45.05 | 55.71 | 61.22 | 72.34 | 66.29 | b | 52.24 | a | 41.92 | 18.77 | 15.47 | a | 41.72 | ||||||||||
1986 | 25.58 | 25.59 | 35.84 | 41.40 | 54.10 | 64.95 | 63.10 | 71.92 | 53.32 | 46.50 | 32.73 | 21.95 | 44.75 | |||||||||||||
1987 | 21.35 | 32.52 | 38.53 | 47.79 | b | 55.05 | 64.10 | a | 65.24 | 66.10 | 62.40 | a | 48.71 | 36.25 | 20.63 | 46.56 | ||||||||||
1988 | 19.47 | 29.00 | 38.00 | 47.20 | 52.81 | b | 59.30 | 67.13 | 66.73 | a | 57.52 | a | 49.84 | 32.14 | a | 21.92 | 45.09 | |||||||||
1989 | 23.26 | 21.09 | 33.34 | 47.29 | a | 52.53 | 62.71 | b | 65.62 | b | 64.67 | a | 59.21 | a | 45.05 | 35.37 | 26.05 | 44.68 | ||||||||
1990 | 26.06 | 24.26 | a | 38.31 | 48.90 | 51.79 | 59.10 | 68.95 | 67.39 | 63.07 | 41.53 | 34.77 | 14.95 | 44.92 | ||||||||||||
1991 | 20.39 | 35.45 | 35.42 | 44.81 | a | 52.16 | 57.21 | a | 66.22 | a | 67.42 | 61.60 | 44.10 | 31.35 | 26.40 | a | 45.21 | |||||||||
1992 | 25.88 | a | 33.40 | 43.03 | 46.98 | 56.60 | a | 66.84 | a | 65.60 | 66.71 | 55.65 | 46.45 | a | 32.20 | 17.42 | 46.40 | |||||||||
1993 | 16.29 | 25.38 | b | 34.63 | 43.07 | 57.69 | b | 58.82 | 60.84 | 64.03 | 59.23 | 48.21 | 27.13 | 22.90 | a | 43.19 | ||||||||||
1994 | 28.52 | 24.38 | 39.03 | a | 48.90 | 55.37 | a | 58.90 | 71.65 | 66.95 | 62.84 | b | 45.95 | a | 25.57 | 22.26 | 45.86 | |||||||||
1995 | 21.97 | 31.02 | 34.42 | 43.42 | 55.97 | 60.20 | 67.50 | 60.45 | 61.21 | a | 42.60 | 32.32 | 23.15 | a | 44.52 | |||||||||||
1996 | 18.80 | a | 24.12 | 34.57 | a | 43.77 | 49.08 | 58.37 | 67.93 | a | 66.69 | 55.94 | c | 42.37 | a | 29.30 | 16.48 | 42.29 | ||||||||
1997 | 22.58 | 27.11 | 33.71 | 41.07 | 53.82 | 57.62 | 64.03 | 67.08 | 58.33 | 42.52 | 34.15 | 24.24 | 43.85 | |||||||||||||
1998 | 22.89 | 32.88 | 37.81 | 45.60 | 56.50 | 60.73 | 70.79 | 69.61 | 64.18 | 44.18 | a | 34.90 | 21.37 | a | 46.79 | |||||||||||
1999 | 27.50 | 28.86 | 34.15 | 42.73 | 49.66 | 58.03 | 64.77 | 67.89 | 56.45 | 42.95 | a | 36.20 | 27.90 | 44.76 | ||||||||||||
2000 | 22.68 | 28.67 | 36.85 | 47.47 | 51.81 | 60.53 | 65.92 | 67.18 | 57.00 | 45.03 | 28.65 | 21.03 | b | 44.40 | ||||||||||||
2001 | 25.55 | 25.84 | 38.23 | 43.95 | 55.35 | a | 58.28 | 68.11 | 69.37 | 61.82 | 43.90 | 35.10 | 23.84 | 45.78 | ||||||||||||
2002 | 26.10 | 28.46 | a | 32.34 | 45.28 | 51.27 | 63.07 | 70.15 | 67.68 | 58.60 | 45.35 | 33.95 | 29.18 | 45.95 | ||||||||||||
2003 | 25.73 | 30.07 | a | 37.25 | a | 44.73 | 52.65 | 65.10 | 72.47 | 70.44 | 61.57 | 48.45 | 27.82 | 21.76 | 46.50 | |||||||||||
2004 | 23.71 | 30.52 | 40.13 | 49.37 | 54.24 | 63.96 | c | 70.77 | 69.85 | 57.18 | 47.00 | 33.75 | 27.87 | 47.36 | ||||||||||||
2005 | 21.98 | 30.07 | 40.47 | 46.95 | 55.81 | 59.85 | 67.97 | 69.52 | 57.63 | 46.32 | a | 28.86 | a | 19.97 | 45.45 | |||||||||||
2006 | 28.40 | 26.29 | 34.90 | b | 44.66 | a | 53.61 | 62.60 | a | 72.74 | b | 68.11 | c | 59.41 | b | 47.05 | c | 28.20 | c | 20.30 | c | 45.52 | ||||
2007 | 15.82 | c | 29.81 | a | 37.15 | 43.41 | s | 54.27 | 65.10 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.26 | h | ||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.94 | v | 17.24 | 17.24 | k | |
2009 | 18.45 | b | 25.13 | a | 29.75 | e | 44.98 | g | 51.60 | b | 62.52 | c | 70.07 | a | 69.57 | c | 60.74 | a | 40.77 | 32.92 | 17.60 | 43.56 | a | |||
2010 | 27.14 | c | 31.96 | 37.23 | 44.07 | 49.88 | a | 59.75 | 68.29 | 67.52 | 56.93 | 47.57 | a | 28.20 | 23.89 | 45.20 | ||||||||||
2011 | 23.60 | 23.88 | 33.47 | 39.68 | 50.94 | 58.87 | 64.35 | 70.16 | 62.87 | 45.10 | 29.90 | 22.28 | a | 43.76 | ||||||||||||
2012 | 19.95 | 28.59 | 33.50 | 44.87 | 53.50 | 57.15 | 71.33 | k | 71.21 | 62.63 | 45.21 | 33.35 | 23.95 | 43.08 | a | |||||||||||
2013 | 16.37 | 31.23 | 37.31 | 44.82 | 55.32 | 60.58 | 73.31 | 68.56 | 60.97 | 43.47 | 32.17 | 17.97 | 45.17 | |||||||||||||
2014 | 25.37 | 22.61 | 35.24 | 44.32 | 56.15 | 63.02 | 75.64 | f | 71.15 | 59.77 | 49.66 | 31.18 | 25.27 | 43.98 | a | |||||||||||
2015 | 24.11 | 33.29 | 41.44 | 45.37 | 58.15 | 70.22 | 73.89 | 70.52 | 56.85 | 50.06 | 29.77 | 21.81 | 47.95 | |||||||||||||
2016 | 23.40 | 29.81 | 37.08 | 52.12 | 58.03 | 63.40 | 67.60 | 69.58 | 57.83 | 43.50 | 38.92 | 17.52 | 46.57 | |||||||||||||
2017 | 15.52 | 23.02 | a | 33.66 | 42.60 | 55.48 | 62.80 | 73.35 | 72.82 | 60.42 | 42.08 | 32.08 | 20.71 | 44.55 | ||||||||||||
2018 | 26.24 | 26.43 | 35.05 | 44.32 | 61.37 | 61.77 | 72.00 | 70.16 | 57.15 | 44.27 | 33.78 | 24.05 | 46.38 | |||||||||||||
2019 | 23.61 | 16.23 | 30.39 | 45.53 | 57.45 | 63.35 | 67.40 | 70.37 | 57.73 | 41.00 | 31.72 | 22.44 | 43.94 | |||||||||||||
2020 | 25.18 | 28.81 | 35.45 | 45.63 | 54.39 | 60.63 | 69.60 | 71.56 | 62.05 | 45.92 | 29.15 | 22.94 | 45.94 | |||||||||||||
2021 | 24.27 | 25.25 | 35.60 | 46.33 | 54.71 | 66.93 | 76.23 | 70.24 | 57.90 | 43.29 | 33.53 | 18.79 | 46.09 | |||||||||||||
2022 | 19.18 | 28.39 | 38.10 | 40.63 | 49.89 | 59.90 | 72.23 | 73.26 | 61.72 | 52.18 | 21.28 | 11.93 | a | 44.06 | ||||||||||||
2023 | 25.55 | 25.43 | 32.52 | 41.62 | 60.92 | 65.30 | 71.81 | 71.32 | 59.80 | 45.60 | 31.47 | 27.48 | 46.57 | |||||||||||||
2024 | 20.45 | 31.55 | 38.21 | 46.41 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.07 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.39 | 27.11 | 35.52 | 44.56 | 53.88 | 61.13 | 68.07 | 67.66 | 57.97 | 44.65 | 30.89 | 21.03 | 44.72 | |||||||||||||
S.D. | 4.95 | 3.87 | 3.21 | 2.87 | 2.83 | 3.42 | 3.53 | 3.04 | 3.50 | 2.72 | 3.71 | 4.39 | 1.60 | |||||||||||||
SKEW | -0.78 | -0.29 | -0.52 | 0.12 | 0.41 | 0.11 | 0.09 | -0.52 | -0.61 | 0.58 | -0.77 | -0.40 | -0.26 | |||||||||||||
MAX | 29.52 | 35.45 | 43.03 | 52.12 | 61.37 | 70.22 | 76.23 | 73.26 | 64.18 | 52.18 | 38.92 | 29.18 | 47.95 | |||||||||||||
MIN | 6.27 | 16.23 | 24.71 | 38.22 | 49.08 | 52.26 | 60.84 | 60.45 | 48.48 | 39.28 | 18.77 | 10.15 | 41.26 | |||||||||||||
YRS | 56 | 55 | 56 | 50 | 53 | 53 | 50 | 55 | 54 | 53 | 54 | 52 | 44 |