YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.91 | h | 50.42 | 48.94 | 38.97 | 27.52 | 14.73 | 7.16 | 31.29 | f | ||||||
1931 | 8.81 | 24.32 | 19.87 | 29.13 | 33.06 | 43.73 | 50.71 | 47.55 | 44.97 | 32.90 | 17.17 | 2.09 | i | 32.02 | a | |||||||||||
1932 | -2.61 | 19.24 | 22.10 | a | 25.65 | j | 33.39 | 39.07 | 50.10 | 48.74 | 37.27 | 28.58 | 14.97 | 7.06 | 27.08 | a | ||||||||||
1933 | 1.13 | -5.54 | 22.84 | 23.17 | 31.42 | 44.90 | a | 52.03 | 48.39 | 44.67 | 32.32 | 21.10 | 16.10 | 27.71 | ||||||||||||
1934 | 16.55 | 23.86 | 24.74 | 29.17 | 38.06 | 37.83 | 51.32 | 50.65 | 39.80 | 28.42 | 19.36 | b | 16.03 | 31.32 | ||||||||||||
1935 | 15.03 | 19.74 | a | 22.57 | a | 30.00 | 35.68 | 41.17 | 50.77 | 50.10 | 39.90 | 28.19 | 17.40 | 11.48 | 30.17 | |||||||||||
1936 | 8.23 | 16.48 | 22.30 | a | 27.37 | 35.00 | a | 46.97 | 51.26 | 50.03 | a | 40.73 | 29.65 | 17.13 | 12.34 | b | 29.79 | |||||||||
1937 | -10.30 | a | 0.80 | c | 20.13 | 25.63 | 34.71 | 41.93 | a | 50.16 | 48.16 | 39.07 | 31.35 | 18.13 | 17.23 | 26.42 | ||||||||||
1938 | 10.29 | 15.86 | 24.00 | 27.83 | a | 34.13 | a | 49.42 | r | 46.03 | 49.90 | 42.87 | 31.13 | a | 13.90 | 12.55 | 28.04 | a | ||||||||
1939 | 6.33 | a | -1.07 | 19.00 | 32.38 | a | 38.55 | 42.17 | 50.19 | 47.39 | 46.14 | a | 27.81 | 19.83 | 12.23 | 28.41 | ||||||||||
1940 | 7.57 | a | 15.62 | 23.81 | 30.21 | a | 35.77 | 42.87 | 50.23 | 48.55 | 44.73 | 32.17 | a | 17.70 | 16.50 | a | 30.48 | |||||||||
1941 | 9.42 | 19.00 | 24.58 | 28.53 | 36.68 | 39.13 | 46.61 | 46.48 | 37.69 | a | 32.94 | 19.73 | 15.97 | 29.73 | ||||||||||||
1942 | 3.97 | 5.75 | 15.90 | 30.90 | 30.52 | 37.67 | 48.57 | a | 47.50 | a | 37.57 | 31.61 | 21.80 | 15.77 | 27.29 | |||||||||||
1943 | 10.97 | b | 12.52 | c | 23.87 | 31.37 | 34.65 | 40.30 | 47.55 | 51.16 | 39.43 | 28.55 | 18.03 | 15.35 | 29.48 | |||||||||||
1944 | 8.26 | 12.93 | 19.71 | 25.50 | 33.94 | 37.10 | 45.68 | ----- | z | 39.93 | 31.13 | 20.23 | 12.35 | 26.07 | a | |||||||||||
1945 | 8.42 | 19.18 | 21.29 | 24.37 | 34.19 | 38.83 | 49.81 | 50.97 | 39.37 | 29.71 | 13.33 | 3.93 | a | 27.78 | ||||||||||||
1946 | 6.42 | 9.50 | 23.45 | 31.00 | 34.84 | 40.67 | 49.77 | 51.03 | 38.31 | a | 29.71 | 21.77 | 19.03 | 29.63 | ||||||||||||
1947 | 2.81 | 22.11 | 23.63 | a | 25.50 | 38.35 | 42.03 | 49.52 | 51.74 | 43.33 | 32.94 | 17.14 | a | 12.74 | 30.15 | |||||||||||
1948 | 5.52 | 12.17 | 14.77 | 29.40 | 38.35 | 41.23 | 47.29 | 48.77 | 42.17 | 29.61 | 16.23 | 12.69 | b | 28.18 | ||||||||||||
1949 | 6.50 | a | -1.04 | 21.26 | 30.30 | 36.58 | 43.30 | 50.26 | 44.74 | 40.10 | 28.74 | 21.17 | 5.84 | 27.31 | ||||||||||||
1950 | 6.47 | a | 12.29 | 21.26 | 26.63 | 32.06 | 38.43 | 49.39 | 45.32 | 38.73 | 32.03 | 20.70 | 17.81 | 28.43 | ||||||||||||
1951 | 10.65 | 16.29 | 20.63 | a | 27.43 | 36.84 | 39.07 | 50.58 | 48.10 | 37.30 | 29.00 | 16.23 | 6.77 | 28.24 | ||||||||||||
1952 | 10.39 | 9.66 | 14.77 | 30.50 | 36.65 | 42.93 | 49.16 | 50.84 | 41.87 | 27.06 | 12.13 | 8.74 | 27.89 | |||||||||||||
1953 | 15.84 | 13.32 | 21.35 | 25.50 | 31.84 | 42.63 | 52.45 | 48.84 | 36.63 | 31.10 | 22.30 | 9.61 | 29.29 | |||||||||||||
1954 | 18.45 | 23.04 | 19.77 | 29.60 | 36.26 | 41.60 | 53.77 | 45.87 | 42.20 | 33.52 | 22.07 | 11.81 | 31.50 | |||||||||||||
1955 | 3.55 | -0.93 | 18.00 | 25.13 | 34.90 | 39.30 | 48.97 | 51.71 | 38.80 | 28.52 | 20.03 | 15.03 | a | 26.92 | ||||||||||||
1956 | 23.06 | 15.07 | 19.52 | 27.03 | 36.32 | 43.93 | 47.52 | 45.93 | a | 38.43 | 28.50 | a | 16.37 | 10.87 | 29.38 | |||||||||||
1957 | 17.63 | a | 19.39 | 25.90 | 29.31 | a | 35.16 | 44.33 | 49.97 | 49.65 | 36.57 | 33.90 | 19.40 | 17.71 | 31.58 | |||||||||||
1958 | 10.55 | 19.04 | 21.16 | 26.13 | 36.39 | 42.93 | 47.32 | 50.68 | 42.80 | 30.13 | a | 20.47 | 14.81 | 30.20 | ||||||||||||
1959 | 9.83 | a | 14.89 | a | 20.17 | a | 27.43 | 33.35 | 43.47 | 49.81 | 48.61 | 38.70 | 29.48 | 17.73 | 14.13 | 28.97 | ||||||||||
1960 | 1.74 | 5.83 | 19.45 | 26.83 | 31.81 | 39.61 | g | 47.63 | a | 48.19 | 43.57 | 30.97 | 21.03 | a | 9.13 | 26.02 | a | |||||||||
1961 | 2.53 | a | 18.36 | 24.13 | 27.20 | 33.97 | 42.70 | 50.06 | 53.37 | a | 38.33 | 29.16 | 21.55 | a | 6.87 | a | 29.02 | |||||||||
1962 | 7.70 | a | 21.71 | 16.00 | a | 27.57 | 32.97 | 40.03 | 47.06 | 47.13 | 40.60 | 33.00 | 23.33 | 14.84 | 29.33 | |||||||||||
1963 | -1.10 | 20.68 | 20.58 | 26.67 | 35.35 | 41.10 | 48.81 | 51.90 | 43.43 | 35.06 | 23.33 | 9.61 | 29.62 | |||||||||||||
1964 | 7.39 | 9.21 | 15.94 | 25.63 | 33.81 | 40.97 | 51.42 | 48.84 | 40.37 | 27.58 | 16.77 | 12.03 | 27.50 | |||||||||||||
1965 | 15.10 | 12.57 | 21.48 | 28.87 | 34.06 | 37.50 | 49.42 | 48.16 | 39.27 | 30.32 | 25.10 | 14.68 | 29.71 | |||||||||||||
1966 | 5.17 | a | 5.14 | 21.58 | 24.77 | 35.00 | 40.67 | 51.71 | 49.55 | 41.47 | 28.61 | 23.57 | 15.37 | a | 28.55 | |||||||||||
1967 | 6.81 | 18.04 | a | 25.58 | 26.21 | a | 31.94 | 41.03 | 51.77 | 49.71 | 41.43 | 28.90 | 18.37 | 7.47 | a | 28.94 | ||||||||||
1968 | 4.13 | 16.72 | 22.06 | 24.70 | 30.19 | 40.97 | 49.48 | 47.45 | 36.07 | 30.58 | 20.93 | 4.71 | 27.33 | |||||||||||||
1969 | 15.68 | 12.71 | 12.35 | 28.67 | 36.58 | 40.80 | 51.90 | 51.87 | 42.37 | 28.77 | 20.93 | 16.55 | 29.93 | |||||||||||||
1970 | 13.03 | 18.36 | 22.23 | 24.17 | 34.94 | 41.31 | a | 49.58 | 52.39 | 39.87 | 29.03 | a | 22.73 | 9.57 | a | 29.77 | ||||||||||
1971 | 5.06 | 16.57 | 19.84 | 26.33 | 33.35 | 40.13 | 50.00 | 51.58 | 38.40 | 29.26 | 17.97 | 11.33 | a | 28.32 | ||||||||||||
1972 | 14.19 | 19.41 | 21.13 | 25.41 | a | 32.94 | 44.83 | 52.19 | 49.39 | 42.20 | 39.00 | 19.53 | 4.19 | 30.37 | ||||||||||||
1973 | -2.32 | 7.29 | 21.52 | 26.60 | 35.61 | 41.33 | 49.35 | 49.29 | 37.47 | 28.81 | 19.37 | 11.50 | a | 27.15 | ||||||||||||
1974 | 1.55 | 2.32 | 28.74 | 25.66 | a | 35.35 | 43.17 | 50.74 | 45.26 | 38.03 | 34.10 | 21.60 | 11.48 | 28.17 | ||||||||||||
1975 | 6.10 | 12.39 | 24.90 | 26.62 | a | 33.00 | 39.07 | 50.03 | 44.52 | 39.07 | 27.87 | 14.43 | 10.74 | 27.40 | ||||||||||||
1976 | 4.35 | 23.97 | 22.90 | 26.83 | 37.61 | 41.47 | 50.97 | 49.71 | 41.87 | 26.32 | 18.03 | 8.03 | 29.34 | |||||||||||||
1977 | 2.94 | 15.32 | 19.16 | 29.90 | 35.42 | 46.03 | 54.32 | 52.16 | 45.45 | a | 31.87 | 24.27 | 18.29 | 31.26 | ||||||||||||
1978 | 16.23 | a | 7.64 | 26.52 | 32.17 | 35.45 | 42.07 | 47.52 | 46.23 | 39.87 | 30.00 | 27.57 | 4.84 | 29.67 | ||||||||||||
1979 | 5.07 | a | 1.18 | 17.55 | 28.93 | 36.29 | 41.00 | 47.90 | a | 47.26 | 39.30 | 31.19 | 15.17 | 11.94 | 26.90 | |||||||||||
1980 | 15.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.87 | p | 48.81 | 40.33 | 29.81 | 20.53 | 23.74 | 29.78 | f | ||||||
1981 | 14.81 | 14.32 | 23.97 | 29.47 | 33.13 | 45.00 | 51.61 | 49.00 | 43.20 | 33.19 | 24.57 | 16.35 | 31.55 | |||||||||||||
1982 | 8.03 | a | 15.75 | 26.32 | 27.63 | 37.32 | 41.40 | 51.39 | 54.20 | a | 46.10 | 27.71 | 24.03 | 12.03 | 30.99 | |||||||||||
1983 | 13.06 | 18.61 | 25.74 | 27.23 | 33.57 | a | 42.67 | 51.57 | a | 52.03 | a | 43.57 | 31.84 | 22.86 | a | 13.97 | a | 31.39 | ||||||||
1984 | 4.03 | 9.83 | 23.29 | 25.55 | a | 37.39 | 44.83 | 53.87 | 52.52 | 43.53 | 31.00 | 18.03 | 14.07 | a | 29.83 | |||||||||||
1985 | 12.39 | 9.18 | 26.74 | 31.23 | 36.97 | 42.24 | a | 51.71 | 48.16 | 40.07 | a | 32.84 | 21.69 | a | 16.68 | 30.82 | ||||||||||
1986 | 20.94 | 23.68 | 25.70 | a | 25.53 | 34.13 | 42.63 | 50.03 | 51.55 | 41.93 | 30.94 | 25.20 | 16.77 | 32.42 | ||||||||||||
1987 | 9.00 | 17.86 | 19.00 | 30.53 | 36.55 | 43.83 | 48.68 | 49.10 | 39.90 | 32.32 | 20.14 | a | 10.90 | 29.82 | ||||||||||||
1988 | 1.94 | 9.24 | 19.06 | 28.10 | 33.52 | 44.30 | 48.53 | a | 48.42 | 38.23 | 31.52 | 18.27 | 6.90 | a | 27.34 | |||||||||||
1989 | -0.23 | 14.62 | b | 25.81 | 29.50 | 36.03 | 42.43 | 51.29 | 47.90 | a | 41.53 | 29.41 | b | 18.63 | 9.94 | 28.91 | ||||||||||
1990 | 7.40 | a | 14.96 | 26.48 | 31.57 | 33.68 | 44.14 | a | 51.90 | 49.48 | 47.07 | 30.97 | 19.55 | a | 2.71 | 29.99 | ||||||||||
1991 | 1.06 | 12.61 | 23.71 | 23.80 | 33.87 | 41.70 | 49.61 | 50.94 | 42.10 | 30.42 | 18.10 | a | 12.61 | 28.38 | ||||||||||||
1992 | 5.23 | 17.64 | a | 20.52 | 29.90 | 39.07 | c | 43.10 | 49.35 | 50.77 | 41.50 | 33.03 | 18.52 | a | 9.18 | c | 29.82 | |||||||||
1993 | 17.03 | a | 17.93 | 25.81 | 29.77 | 37.10 | a | 42.50 | 48.58 | 50.03 | 39.70 | 31.13 | 19.86 | a | 13.24 | b | 31.06 | |||||||||
1994 | 14.10 | 11.61 | 26.52 | 32.43 | 38.77 | 54.50 | 52.87 | 53.03 | 44.74 | k | ----- | z | ----- | z | ----- | z | 35.48 | d | ||||||||
1995 | 16.21 | c | 25.59 | a | 25.23 | 27.83 | 34.94 | 41.50 | 47.26 | 51.87 | 42.63 | 28.58 | 22.27 | 14.13 | 31.50 | |||||||||||
1996 | 12.42 | 20.69 | 21.90 | 26.63 | 38.81 | 45.80 | 52.83 | b | 50.94 | 40.87 | 31.42 | 24.41 | a | 15.90 | 31.88 | |||||||||||
1997 | 13.23 | 13.61 | 20.19 | 28.27 | 38.48 | f | 43.87 | 49.45 | 50.94 | 47.28 | a | 29.52 | 21.97 | 12.16 | 30.04 | a | ||||||||||
1998 | 14.94 | 18.57 | 22.84 | 27.53 | 35.84 | 40.23 | 54.45 | b | 51.23 | 45.87 | 32.23 | 23.70 | 14.45 | 31.82 | ||||||||||||
1999 | 19.19 | 21.04 | 23.74 | 27.03 | 34.13 | 42.20 | 52.77 | 52.29 | 39.67 | 27.67 | a | 19.00 | 12.39 | 30.93 | ||||||||||||
2000 | 16.68 | 24.10 | 23.77 | 30.27 | 37.87 | a | 45.73 | 49.48 | 54.26 | 43.13 | 34.26 | 17.17 | 16.68 | 32.78 | ||||||||||||
2001 | 12.71 | 19.00 | 27.10 | 30.57 | 37.10 | 42.70 | 52.42 | 51.90 | 41.67 | 31.77 | 21.03 | 7.74 | 31.31 | |||||||||||||
2002 | 9.19 | 10.96 | 19.60 | a | 32.07 | 34.81 | 45.50 | 52.58 | 48.65 | 42.28 | a | 30.45 | 20.90 | 17.97 | 30.41 | |||||||||||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.36 | s | 32.58 | 19.13 | 18.42 | 23.38 | i | |||
2015 | 16.81 | e | 18.11 | 25.23 | 26.31 | a | 36.16 | 45.80 | 51.26 | d | 53.43 | a | 40.67 | c | 37.80 | a | 21.03 | 8.07 | a | 31.72 | ||||||
2016 | 3.77 | 11.62 | 23.42 | 27.67 | 34.23 | 46.37 | 50.10 | 50.29 | 41.10 | 32.19 | 23.00 | 13.45 | 29.77 | |||||||||||||
2017 | 16.19 | 23.79 | 23.94 | 27.43 | 34.55 | 44.50 | 53.32 | 48.55 | 43.33 | 28.60 | a | 23.90 | 13.39 | 31.79 | ||||||||||||
2018 | 12.67 | a | 16.54 | 21.35 | 28.82 | b | 36.10 | 44.40 | 54.23 | 50.32 | 42.23 | 34.61 | 17.20 | 13.77 | 31.02 | |||||||||||
2019 | 9.65 | 8.07 | 26.58 | 31.37 | 34.58 | 43.50 | 51.13 | 49.65 | 45.13 | 22.87 | a | 20.07 | 15.97 | 29.88 | ||||||||||||
2020 | 8.42 | 13.48 | 27.26 | 25.73 | 36.32 | 44.63 | 49.35 | 50.55 | 41.67 | 29.19 | 21.07 | 9.29 | 29.75 | |||||||||||||
2021 | 10.10 | 14.11 | 24.52 | 25.97 | 34.42 | 46.27 | 56.48 | 50.13 | 44.20 | 31.39 | 23.17 | 17.03 | 31.48 | |||||||||||||
2022 | 14.58 | 12.57 | 20.90 | 25.80 | 33.45 | 45.33 | 54.71 | 52.84 | 45.90 | 31.87 | 16.63 | 11.42 | 30.50 | |||||||||||||
2023 | 9.68 | 5.79 | 16.77 | 25.93 | 35.77 | 39.07 | 51.32 | 51.65 | 41.90 | 30.68 | 19.17 | 17.13 | 28.74 | |||||||||||||
2024 | 12.94 | 20.48 | 23.97 | 22.82 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.13 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 9.20 | 14.26 | 22.14 | 27.89 | 35.11 | 42.42 | 50.41 | 49.70 | 41.18 | 30.64 | 19.86 | 12.48 | 29.62 | |||||||||||||
S.D. | 6.08 | 6.74 | 3.29 | 2.27 | 1.96 | 2.70 | 2.11 | 2.19 | 2.64 | 2.45 | 3.01 | 4.11 | 1.53 | |||||||||||||
SKEW | -0.29 | -0.73 | -0.53 | 0.20 | -0.12 | 0.95 | 0.22 | -0.23 | 0.30 | 0.41 | -0.12 | -0.22 | -0.11 | |||||||||||||
MAX | 23.06 | 25.59 | 28.74 | 32.43 | 39.07 | 54.50 | 56.48 | 54.26 | 47.28 | 39.00 | 27.57 | 23.74 | 32.78 | |||||||||||||
MIN | -10.30 | -5.54 | 12.35 | 23.17 | 30.19 | 37.10 | 45.68 | 44.52 | 36.07 | 22.87 | 12.13 | 2.71 | 26.42 | |||||||||||||
YRS | 82 | 81 | 81 | 79 | 79 | 78 | 81 | 81 | 81 | 82 | 82 | 81 | 73 |