YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 52.29 | m | 41.67 | a | 32.90 | ----- | z | 37.28 | j | |
1961 | ----- | z | 20.58 | b | 29.08 | 35.22 | 47.78 | a | 56.57 | 60.10 | 59.60 | 48.38 | 42.03 | 24.38 | 15.53 | 39.93 | a | |||||||||
1962 | 8.77 | 25.61 | 25.53 | 41.33 | 47.47 | 54.73 | 60.50 | 59.81 | 53.55 | a | 45.98 | 33.83 | 22.90 | 40.00 | ||||||||||||
1963 | 11.77 | 24.79 | 26.89 | 40.15 | 49.71 | 55.78 | 63.65 | 60.21 | 57.12 | 48.81 | 32.22 | 18.43 | a | 40.79 | ||||||||||||
1964 | 14.58 | 14.91 | 21.34 | 35.67 | a | 47.32 | a | 54.60 | 63.52 | 58.40 | 52.30 | 43.77 | 26.17 | 15.13 | a | 37.31 | ||||||||||
1965 | 18.18 | a | 16.91 | 16.45 | 37.25 | 44.77 | 53.05 | 60.34 | 56.89 | 47.60 | 44.79 | 33.82 | 21.08 | 37.59 | ||||||||||||
1966 | 12.55 | 14.29 | 29.81 | 36.92 | 48.24 | 54.60 | 62.97 | 58.27 | 52.90 | 41.74 | 33.50 | 19.85 | 38.80 | |||||||||||||
1967 | 22.92 | 22.77 | 34.42 | 39.31 | a | 43.86 | b | 52.98 | 61.98 | 58.10 | 53.08 | 45.80 | a | 31.00 | b | 16.52 | 40.23 | |||||||||
1968 | 12.66 | 16.03 | 23.31 | 34.58 | 44.71 | 57.82 | 60.42 | 58.38 | a | 50.93 | 44.37 | 27.75 | 20.40 | 37.61 | ||||||||||||
1969 | 25.84 | 23.73 | 23.29 | 40.68 | 49.31 | 52.31 | a | 62.55 | 63.03 | 53.87 | 31.55 | 23.32 | 12.44 | 38.49 | ||||||||||||
1970 | 13.55 | 21.25 | 20.60 | 29.05 | 48.08 | a | 54.68 | 62.27 | 62.16 | 50.60 | 37.42 | 31.37 | 23.58 | 37.88 | ||||||||||||
1971 | 22.76 | 20.34 | 27.89 | 37.45 | 44.92 | 55.87 | 60.00 | 58.97 | 49.98 | 41.65 | 25.93 | 15.53 | 38.44 | |||||||||||||
1972 | 19.05 | 24.16 | 34.26 | 39.53 | 46.48 | 56.93 | 60.61 | 59.19 | 52.93 | 43.95 | 17.21 | a | 10.42 | 38.73 | ||||||||||||
1973 | 7.00 | 7.68 | 21.33 | a | 28.47 | 44.13 | 54.15 | 58.27 | 58.15 | 49.60 | 42.53 | a | 31.73 | 21.60 | 35.39 | |||||||||||
1974 | 12.66 | 16.25 | 33.26 | 36.32 | 50.39 | 56.38 | 60.56 | 56.40 | 49.47 | 43.71 | 29.57 | 11.95 | 38.08 | |||||||||||||
1975 | 15.82 | 18.98 | a | 27.63 | 34.02 | 44.02 | 52.47 | 60.65 | 58.66 | 50.95 | 43.24 | 27.00 | 24.19 | 38.14 | ||||||||||||
1976 | 18.62 | a | 29.43 | 27.85 | 38.70 | 46.05 | 54.48 | 60.58 | 57.02 | 51.81 | a | 37.85 | a | 29.48 | a | 19.44 | 39.28 | |||||||||
1977 | 17.31 | 21.52 | 24.66 | 37.88 | 46.35 | 57.77 | 61.03 | 59.56 | 52.78 | 42.11 | 31.00 | 24.52 | 39.71 | |||||||||||||
1978 | 20.40 | 22.55 | 31.45 | 39.50 | a | 42.84 | 55.75 | 62.03 | a | 57.47 | 52.60 | 41.42 | 29.98 | 10.82 | 38.90 | |||||||||||
1979 | 7.27 | 15.82 | 26.16 | 35.58 | 43.63 | 52.90 | 60.05 | 56.53 | a | 52.93 | 41.97 | 20.43 | 13.00 | 35.52 | ||||||||||||
1980 | 12.81 | 16.34 | 23.58 | 31.02 | 43.16 | 56.92 | 62.79 | 59.45 | 52.92 | 40.24 | 26.35 | 29.18 | 37.90 | |||||||||||||
1981 | 18.43 | a | 23.88 | 26.71 | 41.93 | 45.32 | 57.85 | 60.97 | 58.16 | 52.22 | 41.66 | 33.37 | 19.84 | 40.03 | ||||||||||||
1982 | 17.93 | a | 20.32 | c | 29.98 | 35.22 | 43.56 | 51.93 | 59.37 | 60.35 | 51.58 | 38.00 | a | 28.20 | 17.97 | b | 37.87 | |||||||||
1983 | 10.21 | 16.87 | a | 26.06 | 31.21 | a | 41.33 | a | 50.90 | a | 61.06 | 60.97 | 53.80 | 42.15 | 28.48 | a | 14.98 | 36.50 | ||||||||
1984 | 3.48 | 11.16 | 20.90 | 30.68 | 47.60 | 53.63 | 61.84 | 59.10 | 51.97 | 35.47 | 29.93 | a | 21.40 | 35.60 | ||||||||||||
1985 | 14.33 | b | 16.36 | 28.94 | 37.28 | 47.08 | 55.85 | 60.35 | 59.73 | 49.38 | 41.18 | 28.78 | 17.55 | 38.07 | ||||||||||||
1986 | 20.74 | 26.38 | 33.44 | 38.48 | 45.48 | 56.81 | a | 59.40 | 59.79 | 49.93 | 39.66 | 25.20 | 4.15 | 38.29 | ||||||||||||
1987 | 9.50 | a | 8.64 | 14.94 | 33.50 | 46.21 | 56.75 | 60.52 | a | 58.73 | 51.59 | a | 44.00 | 29.62 | 16.55 | c | 35.88 | |||||||||
1988 | 9.61 | c | 19.22 | 26.07 | b | 38.23 | 45.85 | a | 57.57 | 60.02 | 61.03 | 50.17 | 44.87 | 29.08 | 11.18 | 37.74 | ||||||||||
1989 | 5.98 | a | 10.54 | 33.05 | 38.55 | 47.97 | 52.58 | 61.78 | a | 57.84 | 51.79 | a | 40.58 | 31.33 | 14.67 | a | 37.22 | |||||||||
1990 | 14.81 | 21.00 | 28.92 | 38.05 | a | 43.16 | 58.13 | 59.94 | 56.73 | 55.08 | 40.87 | ----- | z | 13.79 | 39.13 | a | ||||||||||
1991 | 15.71 | 23.57 | 28.56 | 35.70 | 47.02 | 55.58 | 59.27 | 58.85 | 51.88 | 42.29 | 26.57 | 13.87 | 38.24 | |||||||||||||
1992 | 13.43 | b | 20.59 | b | 28.24 | b | 42.43 | a | 48.35 | 54.36 | a | 58.05 | 57.72 | a | 52.22 | 44.30 | a | 22.62 | 14.68 | c | 38.08 | |||||
1993 | 14.02 | a | 13.89 | 28.42 | a | 36.17 | 46.98 | 55.26 | a | 60.32 | 57.45 | b | 49.73 | b | 39.48 | 22.86 | b | 19.53 | a | 37.01 | ||||||
1994 | 17.98 | 14.67 | a | 32.28 | b | 36.55 | a | 48.55 | 59.38 | 60.74 | 60.71 | 52.48 | 40.76 | 28.60 | 22.72 | b | 39.62 | |||||||||
1995 | 20.21 | b | 25.89 | 29.88 | a | 33.52 | 42.05 | 52.75 | 58.32 | 62.48 | b | 51.25 | 40.87 | a | 33.31 | a | 23.27 | a | 39.48 | |||||||
1996 | 18.90 | a | 25.61 | a | 26.53 | b | 37.20 | 49.74 | 55.95 | 62.78 | a | 59.15 | 49.00 | a | 41.58 | a | 31.12 | 21.48 | 39.92 | |||||||
1997 | 18.90 | a | 19.48 | 31.74 | 33.18 | b | 46.27 | 56.07 | 60.85 | a | 59.03 | 55.29 | a | 39.29 | b | 25.46 | g | 5.18 | i | 42.01 | b | |||||
1998 | 13.87 | e | 11.74 | c | 23.73 | 32.82 | 47.45 | 53.63 | 62.53 | 60.18 | a | 56.03 | 42.37 | ----- | z | 19.57 | b | 38.54 | a | |||||||
1999 | 22.21 | c | 26.23 | b | 34.15 | 33.05 | 43.74 | b | 54.00 | a | 62.18 | a | 59.13 | a | 50.22 | c | 42.08 | a | 34.70 | 18.84 | 40.05 | |||||
2000 | 20.02 | 23.74 | 29.74 | 39.97 | a | 49.38 | a | 56.57 | 62.92 | a | 62.27 | 53.48 | a | 41.53 | b | 22.48 | a | 18.90 | b | 40.08 | ||||||
2001 | 15.00 | 19.02 | 29.26 | 39.68 | 46.72 | a | 57.50 | 63.53 | 60.37 | 53.93 | 43.48 | b | 32.72 | a | 21.05 | 40.19 | ||||||||||
2002 | 18.79 | b | 16.31 | a | 25.84 | 42.05 | a | 47.33 | a | 60.42 | 63.55 | 60.75 | a | 52.37 | 39.11 | 29.34 | a | 21.05 | 39.74 | |||||||
2003 | 26.10 | a | 17.84 | 27.90 | 39.27 | b | 48.02 | 54.42 | 64.95 | 61.82 | 51.57 | a | 46.47 | b | 27.93 | b | 23.13 | 40.78 | ||||||||
2004 | 18.33 | b | 10.14 | 34.78 | a | 37.29 | a | 48.16 | 54.68 | b | 59.08 | 57.07 | a | 51.17 | a | 41.71 | c | 26.67 | 20.91 | b | 38.33 | |||||
2005 | 25.21 | 21.04 | a | 28.19 | 36.50 | 48.02 | 54.48 | 63.00 | a | 58.73 | 53.08 | 43.55 | 31.48 | 19.83 | b | 40.26 | ||||||||||
2006 | 20.05 | a | 20.82 | 28.16 | 40.32 | 48.58 | 58.60 | 62.15 | 58.18 | 47.75 | 39.73 | 31.95 | 17.37 | 39.47 | ||||||||||||
2007 | 4.26 | 21.68 | 31.45 | 36.32 | 45.97 | 55.58 | 61.98 | 61.27 | 53.57 | 42.44 | 31.95 | 14.98 | 38.45 | |||||||||||||
2008 | 7.82 | 15.98 | 21.85 | 33.72 | 43.94 | 55.03 | 62.26 | 59.73 | 52.18 | b | 43.15 | 34.17 | a | 20.02 | 37.49 | |||||||||||
2009 | 20.50 | 25.32 | 31.34 | 34.87 | 49.06 | 53.87 | 60.97 | 58.76 | 51.22 | 36.58 | a | 32.35 | 10.66 | 38.79 | ||||||||||||
2010 | 13.87 | 10.93 | 21.13 | 37.37 | 44.16 | 57.52 | 62.68 | 60.87 | 55.52 | 43.15 | 29.55 | 26.68 | 38.62 | |||||||||||||
2011 | 17.68 | 13.82 | 31.21 | 37.30 | 42.50 | 57.65 | 64.34 | 62.56 | 52.97 | 40.16 | 28.55 | a | 13.75 | c | 38.54 | |||||||||||
2012 | 20.42 | 18.11 | a | 33.97 | 41.40 | 47.48 | 60.50 | 63.35 | 60.97 | 53.08 | 42.11 | 33.43 | 15.89 | 40.89 | ||||||||||||
2013 | 7.30 | a | 16.62 | 25.94 | 32.32 | 44.39 | 58.20 | 61.24 | 61.11 | 55.82 | 40.11 | 28.35 | 12.68 | 37.01 | ||||||||||||
2014 | 17.11 | 17.63 | a | 27.31 | 34.47 | 44.15 | 56.18 | 61.92 | 57.85 | 54.82 | 44.24 | 29.30 | 16.95 | 38.49 | ||||||||||||
2015 | 18.23 | 23.76 | a | 32.19 | 37.72 | 43.83 | a | 58.58 | 59.95 | 61.10 | 56.20 | 46.73 | 29.20 | 11.02 | 39.88 | |||||||||||
2016 | 9.21 | c | 22.90 | 30.10 | 36.80 | 43.79 | 60.00 | 62.69 | 58.58 | 53.98 | 46.11 | 33.41 | a | 18.15 | a | 39.64 | ||||||||||
2017 | 12.67 | b | 28.96 | 35.68 | a | 37.28 | a | 44.44 | 58.31 | a | 62.12 | b | 58.10 | 53.60 | a | 40.90 | a | 36.76 | a | 26.35 | a | 41.26 | ||||
2018 | 21.38 | c | 23.96 | 29.81 | 38.05 | 50.47 | 59.95 | 63.93 | a | 59.73 | 55.20 | 40.05 | a | 25.98 | 18.32 | 40.57 | ||||||||||
2019 | 11.22 | b | 16.98 | 27.13 | 37.22 | a | 41.10 | 52.90 | 61.95 | 61.37 | 56.57 | 35.29 | 28.02 | 9.97 | a | 36.64 | ||||||||||
2020 | 12.60 | 11.97 | 29.81 | 35.15 | 48.69 | 56.83 | 61.39 | 62.05 | 51.70 | 41.00 | 32.87 | 12.48 | 38.04 | |||||||||||||
2021 | 13.48 | a | 18.04 | 26.06 | 35.20 | 45.98 | 57.35 | 62.35 | 59.89 | 56.18 | 42.18 | 35.13 | 27.65 | 39.96 | ||||||||||||
2022 | 19.40 | 12.59 | 26.61 | 36.12 | 45.66 | 56.55 | 62.77 | 60.00 | 55.45 | 42.39 | 27.65 | 22.24 | 38.95 | |||||||||||||
2023 | 17.18 | 17.89 | 25.58 | 34.72 | 47.90 | 53.40 | 64.06 | 61.56 | 54.32 | 43.45 | 30.78 | 19.19 | 39.17 | |||||||||||||
2024 | 18.15 | 20.45 | 26.63 | 38.02 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.74 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.57 | 19.01 | 27.80 | 36.56 | 46.14 | 55.79 | 61.50 | 59.49 | 52.50 | 41.78 | 29.39 | 17.93 | 38.64 | |||||||||||||
S.D. | 5.26 | 5.07 | 4.34 | 3.10 | 2.32 | 2.25 | 1.56 | 1.65 | 2.21 | 2.89 | 3.82 | 4.94 | 1.41 | |||||||||||||
SKEW | -0.25 | -0.17 | -0.57 | -0.39 | -0.16 | 0.10 | -0.09 | 0.15 | -0.05 | -0.70 | -0.75 | -0.12 | -0.37 | |||||||||||||
MAX | 26.10 | 29.43 | 35.68 | 42.43 | 50.47 | 60.50 | 64.95 | 63.03 | 57.12 | 48.81 | 36.76 | 29.18 | 41.26 | |||||||||||||
MIN | 3.48 | 7.68 | 14.94 | 28.47 | 41.10 | 50.90 | 58.05 | 56.40 | 47.60 | 31.55 | 17.21 | 4.15 | 35.39 | |||||||||||||
YRS | 63 | 64 | 64 | 63 | 63 | 63 | 63 | 63 | 63 | 64 | 61 | 62 | 59 |