YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.17 | a | 18.17 | k |
1933 | 26.77 | e | 22.70 | a | 33.13 | 34.83 | 38.67 | a | 45.43 | 44.38 | w | ----- | z | 41.70 | 36.90 | 31.80 | 34.23 | 34.62 | b | |||||||
1934 | 33.19 | 31.36 | 33.87 | 38.40 | 39.50 | c | 49.38 | v | 50.21 | l | 47.61 | 40.33 | 39.67 | s | 36.17 | 30.33 | a | 36.75 | c | |||||||
1935 | 25.10 | a | 29.29 | 28.74 | 34.33 | 36.74 | 46.10 | 49.52 | 46.39 | 40.40 | 33.97 | 24.07 | c | 25.79 | b | 35.04 | ||||||||||
1936 | 27.32 | 9.88 | d | 31.35 | 38.17 | 42.40 | a | 48.17 | 50.10 | 48.48 | ----- | z | ----- | z | ----- | z | ----- | z | 36.98 | d | ||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | 28.97 | 29.11 | a | 33.00 | 36.60 | 39.48 | 47.53 | 53.39 | 44.58 | 46.57 | 37.84 | 27.00 | 26.87 | 37.58 | ||||||||||||
1939 | 29.77 | 24.86 | 33.45 | 34.57 | 40.29 | 44.60 | 52.13 | 48.19 | 43.17 | 35.00 | 24.50 | 31.20 | a | 36.81 | ||||||||||||
1940 | 22.84 | 33.52 | 34.87 | 37.57 | 40.84 | 45.83 | 51.29 | 48.19 | 50.00 | 42.77 | 26.70 | 26.77 | 38.43 | |||||||||||||
1941 | 27.68 | 30.39 | 32.10 | 36.37 | 43.87 | 49.10 | 55.35 | 53.29 | 44.37 | 36.90 | a | 33.37 | 30.32 | 39.43 | ||||||||||||
1942 | 13.52 | 29.59 | a | 32.13 | 37.27 | 41.97 | 44.90 | 53.40 | a | 51.00 | 42.33 | 36.61 | 31.83 | 30.23 | 37.06 | |||||||||||
1943 | 16.58 | 28.75 | 30.26 | 38.37 | 39.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.60 | g | |||||
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 | 43.67 | 37.23 | 29.83 | 28.45 | 34.79 | h | ||||
1957 | 14.42 | e | 26.29 | 34.03 | 38.00 | 46.61 | 49.60 | 49.10 | 47.55 | 43.77 | 38.32 | 29.07 | 32.44 | d | 37.43 | |||||||||||
1958 | 31.13 | 38.25 | 29.84 | 38.37 | 46.19 | 51.83 | 54.55 | 53.03 | b | 45.53 | 35.58 | 32.30 | 31.61 | 40.69 | ||||||||||||
1959 | 27.81 | 31.54 | 33.87 | 37.17 | a | 39.45 | 45.97 | 49.58 | 48.13 | 46.17 | 37.97 | 23.27 | 26.06 | 37.25 | ||||||||||||
1960 | 13.48 | 28.45 | 30.52 | 37.30 | 40.61 | 44.03 | 52.13 | 49.58 | 42.33 | 37.58 | 33.17 | 25.74 | 36.24 | |||||||||||||
1961 | 31.00 | 37.46 | 35.77 | 36.27 | 42.13 | 48.87 | 52.16 | 54.68 | 40.33 | 34.03 | 21.97 | 27.47 | a | 38.51 | ||||||||||||
1962 | 24.60 | a | 28.86 | 32.16 | 38.00 | 42.03 | 41.83 | 50.29 | 50.84 | 44.07 | 37.87 | 36.37 | 30.67 | a | 38.13 | |||||||||||
1963 | 17.87 | 32.86 | 32.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.13 | 34.20 | 26.23 | 30.32 | f | ||||||
1964 | 30.81 | 27.00 | 30.39 | 32.63 | 37.55 | 46.93 | 50.71 | 48.16 | 39.80 | 32.13 | 32.40 | 24.61 | 36.09 | |||||||||||||
1965 | 28.61 | 31.29 | 25.81 | 38.72 | a | 39.10 | 46.53 | 52.00 | 53.55 | 39.13 | 37.00 | 33.67 | 26.26 | 37.64 | ||||||||||||
1966 | 28.58 | 29.71 | 31.13 | 34.20 | 39.81 | 45.23 | 50.13 | 48.90 | 45.93 | 33.39 | 33.87 | 32.68 | 37.80 | |||||||||||||
1967 | 33.55 | 29.21 | 30.61 | 33.03 | 39.52 | 47.60 | 51.16 | 52.84 | 46.37 | 36.26 | 29.03 | 26.16 | 37.95 | |||||||||||||
1968 | 27.87 | a | 32.10 | 33.61 | 32.60 | 41.48 | 49.33 | 52.74 | 51.39 | 46.10 | 34.00 | 33.21 | a | 25.65 | 38.34 | |||||||||||
1969 | 12.23 | 28.86 | 31.03 | 36.03 | 43.94 | 51.03 | 49.77 | 47.23 | 45.47 | 33.06 | 31.37 | 29.23 | 36.60 | |||||||||||||
1970 | 25.55 | 32.59 | a | 31.45 | 32.53 | 41.35 | 51.33 | 53.71 | 48.77 | 40.17 | 33.52 | 31.40 | 26.77 | 37.43 | ||||||||||||
1971 | 29.58 | 28.25 | 29.81 | 34.07 | 41.90 | 46.13 | 50.00 | 53.10 | 39.00 | 31.16 | 31.73 | 27.10 | 36.82 | |||||||||||||
1972 | 26.76 | b | 26.55 | 34.77 | 32.87 | 42.26 | 48.83 | 51.74 | 51.94 | 39.73 | 31.97 | 31.77 | 21.04 | d | 36.69 | |||||||||||
1973 | 21.00 | 29.46 | 33.32 | 33.53 | 41.61 | 47.00 | 50.84 | 48.26 | 44.37 | 35.81 | 33.63 | 32.23 | 37.59 | |||||||||||||
1974 | 18.48 | 32.50 | 32.45 | 37.93 | 40.35 | 47.48 | a | 51.55 | 50.84 | 40.27 | 31.50 | a | 34.30 | 30.52 | 37.35 | |||||||||||
1975 | 25.35 | 26.43 | 29.58 | 32.00 | 40.84 | 45.53 | 54.77 | 48.42 | 39.50 | 38.61 | 30.20 | 29.74 | 36.75 | |||||||||||||
1976 | 29.68 | 28.00 | 30.23 | 35.33 | 39.58 | 43.90 | 50.61 | 51.81 | 45.20 | 31.35 | 32.83 | 23.52 | 36.84 | |||||||||||||
1977 | 19.52 | 29.96 | 32.74 | 34.57 | 39.77 | 48.90 | 51.55 | 55.10 | 44.30 | 33.68 | 28.40 | 28.97 | 37.29 | |||||||||||||
1978 | 26.68 | 33.07 | a | 33.58 | 37.47 | 41.26 | 47.37 | 52.58 | 51.84 | 44.80 | 30.19 | 21.67 | 19.55 | 36.67 | ||||||||||||
1979 | 6.97 | 29.96 | c | 33.55 | 38.00 | a | 43.10 | a | 45.77 | 52.00 | 53.32 | 45.30 | 39.68 | 28.27 | 30.03 | b | 37.16 | |||||||||
1980 | 18.70 | a | 30.17 | 32.00 | a | 37.83 | 43.52 | 46.17 | 52.39 | 47.71 | 44.67 | 35.16 | 33.83 | 29.65 | 37.65 | |||||||||||
1981 | 31.13 | 29.36 | 32.58 | 36.77 | 42.52 | 47.43 | 48.48 | 50.55 | 42.67 | 35.57 | a | 33.60 | 29.50 | a | 38.35 | |||||||||||
1982 | 25.19 | 29.07 | 32.60 | a | 32.90 | 40.07 | a | 51.43 | 52.90 | 52.00 | a | 43.67 | 36.03 | b | 28.93 | a | 29.42 | 37.85 | ||||||||
1983 | 32.19 | 34.30 | a | 37.45 | 34.47 | 42.00 | 46.83 | a | 51.55 | 54.07 | b | 41.00 | d | 34.73 | a | 37.27 | 18.39 | c | 38.69 | |||||||
1984 | 25.26 | 31.45 | 35.61 | 36.24 | a | 41.23 | a | 46.23 | 50.94 | 52.16 | 43.20 | 33.71 | 33.03 | 21.94 | 37.58 | |||||||||||
1985 | 21.03 | 23.62 | b | 30.77 | 38.23 | 42.29 | 46.57 | 53.81 | 49.20 | a | 39.80 | 34.33 | a | 19.21 | b | 12.57 | a | 34.29 | ||||||||
1986 | 27.58 | 30.96 | 37.24 | b | 35.17 | 42.90 | 49.83 | 49.23 | 52.65 | 42.10 | 34.35 | 34.73 | 26.71 | 38.62 | ||||||||||||
1987 | 20.83 | a | 31.04 | 34.90 | 38.43 | 44.35 | 47.27 | 52.42 | 46.93 | a | 42.67 | 29.45 | 31.70 | 25.00 | 37.08 | |||||||||||
1988 | 24.39 | 25.86 | 30.90 | 39.07 | 42.00 | 48.47 | 50.90 | 46.52 | 42.07 | 38.58 | 35.17 | 26.55 | 37.54 | |||||||||||||
1989 | 28.00 | a | 18.56 | c | 32.74 | 39.07 | 41.68 | 48.13 | 49.45 | 51.84 | 41.40 | 34.97 | 33.17 | a | 25.87 | 37.07 | ||||||||||
1990 | 31.13 | ----- | z | 31.29 | 37.53 | 41.87 | a | 49.23 | 53.65 | 53.39 | 45.40 | 35.43 | a | 35.20 | 18.68 | c | 39.35 | a | ||||||||
1991 | 22.52 | 34.29 | 30.80 | a | 35.77 | 41.55 | 46.00 | 50.77 | 53.26 | 41.90 | 32.97 | 33.87 | 30.00 | 37.81 | ||||||||||||
1992 | 32.68 | 34.03 | 32.35 | 39.00 | 41.13 | 50.67 | 53.42 | 51.29 | 42.87 | 37.30 | a | 33.63 | 23.84 | 39.35 | ||||||||||||
1993 | 15.81 | 21.63 | a | 31.19 | 38.17 | 46.63 | a | 49.13 | 51.32 | 49.27 | a | 42.07 | 37.00 | 18.97 | a | 30.16 | 35.95 | |||||||||
1994 | 32.29 | 26.25 | 31.55 | 39.80 | 44.52 | 46.53 | 53.13 | 50.58 | 44.47 | 34.45 | 31.67 | 28.26 | 38.62 | |||||||||||||
1995 | 28.26 | 31.11 | 32.03 | a | 35.87 | 42.32 | 46.83 | 53.65 | 46.97 | 46.52 | a | 36.45 | 36.00 | 28.72 | b | 38.73 | ||||||||||
1996 | 30.03 | b | 26.62 | c | 32.87 | a | 38.40 | 41.35 | 44.73 | 52.68 | 50.97 | 42.27 | 37.06 | 31.10 | a | 27.74 | 37.99 | |||||||||
1997 | 23.65 | 30.43 | 34.70 | a | 36.03 | 43.87 | 47.57 | 50.71 | 52.71 | 47.00 | 35.27 | a | 33.93 | a | 27.84 | 38.64 | ||||||||||
1998 | 29.19 | 33.37 | a | 33.29 | 34.90 | 42.81 | 47.60 | 57.39 | 51.81 | 48.60 | 32.55 | 35.93 | a | 26.26 | 39.47 | |||||||||||
1999 | 32.29 | 31.70 | a | 32.55 | 31.73 | 38.52 | 46.43 | b | 49.10 | 54.45 | 38.43 | 32.00 | 35.77 | 31.73 | a | 37.89 | ||||||||||
2000 | 29.20 | a | 31.66 | 31.13 | a | 37.30 | 43.52 | 45.86 | a | 50.71 | 47.55 | 45.17 | a | 37.06 | 27.14 | a | 26.58 | 37.74 | ||||||||
2001 | 28.42 | 27.39 | 31.58 | 36.10 | 41.74 | 46.80 | 51.68 | 51.61 | 45.17 | 34.32 | 33.57 | 28.23 | 38.05 | |||||||||||||
2002 | 28.06 | 28.54 | 30.10 | a | 33.97 | 40.00 | 49.67 | 53.77 | 47.84 | 42.07 | 29.10 | 29.60 | 32.32 | 37.09 | ||||||||||||
2003 | 34.13 | 29.25 | 36.71 | 36.70 | 42.90 | 46.87 | 53.06 | 50.10 | a | 46.07 | 39.52 | 26.27 | 28.94 | 39.21 | ||||||||||||
2004 | 21.06 | 30.34 | 33.68 | 34.80 | 43.29 | 47.75 | b | 52.32 | 54.33 | a | 44.21 | a | 37.68 | 30.36 | b | 29.74 | 38.30 | |||||||||
2005 | 26.19 | 21.89 | 32.10 | 36.43 | 44.58 | 44.93 | 51.74 | 49.16 | 39.27 | 37.29 | 30.67 | 23.55 | 36.48 | |||||||||||||
2006 | 33.84 | 25.18 | 32.77 | a | 36.23 | 39.77 | a | 48.60 | 53.94 | 48.68 | 45.60 | 34.28 | b | 32.50 | 25.97 | a | 38.11 | |||||||||
2007 | 22.30 | a | 29.61 | 33.13 | 33.90 | a | 41.00 | 47.56 | c | 54.61 | c | 47.10 | a | 40.60 | 35.35 | 28.83 | 28.48 | 36.87 | ||||||||
2008 | 22.10 | a | 30.07 | 31.03 | 31.10 | 42.87 | a | 42.85 | d | 50.65 | 51.07 | a | 39.28 | a | 30.54 | c | 33.07 | 16.57 | a | 35.10 | ||||||
2009 | 24.77 | 27.71 | 28.94 | 33.21 | b | 38.06 | m | 50.33 | x | ----- | z | 50.68 | i | 43.83 | a | 31.75 | o | ----- | z | ----- | z | 31.69 | g | |||
2010 | 32.84 | 32.29 | 30.81 | 35.77 | 40.00 | a | 45.66 | a | 49.53 | a | 48.80 | f | 42.82 | b | 36.70 | a | 26.13 | 28.13 | 36.42 | a | ||||||
2011 | 26.19 | 26.54 | 33.61 | 33.53 | 39.07 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.79 | g | ||||
2012 | 24.71 | 26.69 | 29.86 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.87 | 28.03 | h | |||
2013 | 23.52 | 27.32 | 29.00 | 32.33 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.04 | h | ||||
2014 | ----- | z | ----- | z | 31.97 | 35.80 | 41.68 | 46.27 | 56.06 | 54.03 | 44.00 | 41.77 | 26.03 | 28.45 | 40.61 | b | ||||||||||
2015 | 28.07 | a | 29.20 | m | 31.95 | l | 33.07 | c | 42.80 | f | 51.68 | h | 54.08 | g | 49.45 | 41.87 | 38.52 | 29.60 | 30.52 | 35.87 | e | |||||
2016 | 28.52 | 31.76 | 33.33 | a | 39.03 | 42.81 | 47.31 | a | 51.90 | 48.87 | 43.37 | 40.00 | 37.53 | 19.87 | 38.69 | |||||||||||
2017 | 14.10 | 24.96 | 34.68 | 36.43 | 42.10 | 47.40 | 51.06 | 52.06 | 45.67 | 34.03 | 32.33 | 23.77 | 36.55 | |||||||||||||
2018 | 32.45 | b | 27.04 | 30.65 | 35.53 | 46.45 | 47.62 | a | 50.94 | 51.58 | 39.47 | 35.57 | a | 29.07 | 29.68 | 38.00 | ||||||||||
2019 | 29.94 | 18.89 | 22.94 | 38.27 | 42.87 | 46.87 | 50.61 | 51.61 | 46.37 | 30.06 | 25.73 | 27.32 | 35.96 | |||||||||||||
2020 | 30.45 | 27.34 | 28.58 | 32.37 | 41.03 | 43.43 | 46.68 | 49.97 | 44.50 | 37.23 | 30.77 | 27.90 | 36.69 | |||||||||||||
2021 | 30.77 | 27.57 | 29.90 | 28.40 | 38.90 | 49.60 | 53.41 | i | 52.62 | e | 42.08 | f | 35.30 | a | 32.81 | d | 26.35 | 35.22 | b | |||||||
2022 | 26.48 | 24.86 | 35.13 | 32.53 | 42.39 | h | 48.04 | f | 53.58 | 54.16 | 45.11 | b | 39.13 | a | 27.21 | b | 22.00 | y | 37.58 | c | ||||||
2023 | ----- | z | ----- | z | ----- | z | 36.07 | a | 44.94 | 46.97 | 52.16 | 55.58 | 48.65 | m | 39.00 | g | 33.46 | b | 32.26 | 43.06 | e | |||||
2024 | 23.10 | a | 32.62 | 31.94 | 34.62 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.57 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.75 | 28.80 | 32.09 | 35.74 | 41.69 | 47.17 | 51.82 | 50.62 | 43.25 | 35.44 | 30.87 | 27.14 | 37.53 | |||||||||||||
S.D. | 5.83 | 4.26 | 2.33 | 2.35 | 2.08 | 2.02 | 1.89 | 2.54 | 2.55 | 2.85 | 4.12 | 4.10 | 1.13 | |||||||||||||
SKEW | -0.96 | -1.34 | -0.64 | -0.50 | 0.29 | 0.05 | 0.25 | -0.09 | 0.04 | -0.08 | -0.94 | -1.18 | -0.18 | |||||||||||||
MAX | 34.13 | 38.25 | 37.45 | 39.80 | 46.63 | 51.83 | 57.39 | 55.58 | 50.00 | 42.77 | 37.53 | 34.23 | 40.69 | |||||||||||||
MIN | 6.97 | 9.88 | 22.94 | 28.40 | 36.74 | 41.83 | 46.68 | 44.58 | 38.43 | 29.10 | 18.97 | 12.57 | 34.29 | |||||||||||||
YRS | 76 | 74 | 76 | 76 | 71 | 68 | 67 | 69 | 70 | 70 | 72 | 73 | 61 |