YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 35.63 | c | 37.18 | c | 49.04 | c | 58.58 | 51.26 | 50.10 | 36.16 | 26.77 | 19.42 | 40.46 | c | ||||||
1963 | 11.69 | b | 21.96 | 25.90 | 35.65 | m | 43.29 | 45.03 | 58.65 | 58.00 | 52.61 | b | 35.37 | a | 24.97 | a | 8.78 | h | 37.75 | b | ||||||
1964 | 9.40 | a | 11.62 | 21.16 | 32.20 | 42.58 | 46.73 | 58.00 | 55.16 | 49.83 | 30.26 | 20.50 | 16.48 | 32.83 | ||||||||||||
1965 | 15.13 | 16.78 | a | 26.74 | 31.60 | 39.58 | 45.37 | 58.23 | 54.65 | 48.10 | 29.84 | 24.21 | a | 21.87 | 34.34 | |||||||||||
1966 | 14.72 | b | 18.15 | a | 23.52 | 34.30 | 41.06 | 48.73 | 57.94 | 56.19 | 46.67 | 33.42 | 23.80 | 11.94 | 34.20 | |||||||||||
1967 | 7.46 | c | 19.18 | 27.48 | 35.13 | 39.32 | 51.30 | 61.29 | 55.48 | 46.00 | 33.35 | 23.87 | 20.26 | 35.01 | ||||||||||||
1968 | 17.42 | 25.97 | 30.35 | 32.77 | 41.77 | 46.83 | 55.94 | 54.55 | 41.00 | 32.13 | 25.10 | 14.26 | 34.84 | |||||||||||||
1969 | 21.35 | 20.43 | 20.06 | 35.53 | 42.81 | 49.00 | 58.00 | 57.16 | 47.73 | 35.84 | 24.50 | 22.52 | 36.24 | |||||||||||||
1970 | 13.77 | 22.21 | 26.81 | 29.80 | 40.23 | 48.13 | 58.19 | 55.83 | a | 45.83 | 32.26 | 22.53 | 14.10 | a | 34.14 | |||||||||||
1971 | 9.90 | 18.85 | b | 26.39 | 31.07 | 37.87 | 46.77 | 59.74 | 54.84 | 45.21 | a | 38.13 | 26.50 | 21.45 | 34.73 | |||||||||||
1972 | 17.23 | 21.27 | c | 28.94 | 33.93 | 38.94 | 50.13 | 58.35 | 55.32 | 50.17 | 43.39 | c | 25.60 | 19.28 | b | 36.88 | ||||||||||
1973 | 17.48 | b | 24.07 | 31.22 | d | 31.50 | 42.32 | 47.00 | 56.81 | 53.71 | 43.77 | 29.71 | 22.13 | 15.17 | b | 34.57 | ||||||||||
1974 | 18.00 | g | 14.14 | 32.77 | 30.90 | 42.06 | 49.07 | 56.65 | 55.10 | 47.87 | 41.84 | 26.07 | 15.84 | f | 39.65 | b | ||||||||||
1975 | 19.54 | c | 22.00 | 26.80 | f | 27.80 | 36.52 | 44.53 | 55.90 | 51.35 | 46.17 | 27.76 | b | 19.22 | c | ----- | z | 35.08 | b | |||||||
1976 | ----- | z | 20.33 | t | 23.48 | 29.60 | 42.61 | 46.61 | b | 56.81 | 55.10 | 48.40 | 31.29 | 18.21 | b | 8.93 | a | 36.10 | b | |||||||
1977 | 15.29 | c | 19.93 | 20.61 | 34.80 | 40.06 | 48.13 | 57.61 | 57.50 | a | 48.10 | 34.77 | 23.19 | c | 19.48 | 34.96 | ||||||||||
1978 | 19.84 | 23.71 | 28.16 | 32.30 | 39.57 | a | 48.20 | 54.71 | 52.06 | 47.81 | c | 36.16 | 30.33 | 18.90 | 35.98 | |||||||||||
1979 | 17.71 | 16.61 | 23.03 | 29.83 | 41.90 | 46.00 | a | 52.13 | 51.94 | 47.73 | 34.06 | 20.80 | 13.26 | 32.92 | ||||||||||||
1980 | 22.29 | 21.83 | 23.74 | 29.17 | 36.90 | 44.57 | 55.90 | 55.46 | c | 48.82 | b | 30.00 | ----- | z | ----- | z | 36.87 | b | ||||||||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | 45.50 | y | ----- | z | 56.30 | u | 61.40 | y | 71.33 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.62 | v | 24.92 | f | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | 33.53 | 42.39 | 51.97 | 60.26 | 61.81 | 57.17 | 43.45 | 32.07 | 40.34 | b | 47.00 | c | ||||||||
1984 | 39.11 | c | 29.45 | 30.97 | a | 35.67 | 51.42 | 55.93 | 61.45 | 60.87 | 53.47 | 40.03 | 28.57 | 23.42 | 42.53 | |||||||||||
1985 | 23.42 | 23.21 | 33.74 | 40.10 | 47.42 | 55.53 | 60.00 | 59.10 | 49.97 | 42.29 | 40.71 | f | 29.82 | c | 42.24 | a | ||||||||||
1986 | 35.10 | 39.93 | a | 38.29 | 38.03 | 35.28 | b | 38.33 | 66.97 | a | 70.00 | a | 57.47 | 50.23 | 44.86 | a | 33.82 | c | 45.69 | |||||||
1987 | 15.52 | 25.46 | 26.32 | 35.37 | 47.35 | 52.50 | 58.42 | 58.23 | 49.87 | 39.87 | 24.93 | 17.97 | 37.65 | |||||||||||||
1988 | 16.52 | 23.55 | 26.16 | 37.83 | 46.77 | 56.17 | 61.45 | 61.74 | 49.00 | 40.71 | 28.53 | 18.26 | 38.89 | |||||||||||||
1989 | 16.23 | 24.86 | 30.97 | 40.93 | 50.19 | 55.47 | 61.29 | 59.13 | 49.57 | 38.52 | 24.77 | 14.06 | 38.83 | |||||||||||||
1990 | 14.87 | 19.96 | 32.87 | 42.70 | 47.26 | 57.10 | 61.39 | 56.58 | 55.43 | 37.65 | 27.77 | 17.19 | 39.23 | |||||||||||||
1991 | 19.23 | 24.14 | 30.13 | 35.20 | 43.97 | 52.43 | 61.23 | 60.97 | 52.60 | 37.90 | 29.20 | 24.06 | 39.26 | |||||||||||||
1992 | 19.55 | 25.86 | 31.90 | 40.70 | 49.03 | 52.10 | 58.71 | 57.90 | 49.27 | 40.58 | 21.90 | 17.58 | 38.76 | |||||||||||||
1993 | 26.45 | 26.18 | 30.42 | 39.17 | 47.58 | 54.60 | 61.97 | 60.35 | 46.97 | 35.97 | 22.43 | 14.42 | 38.88 | |||||||||||||
1994 | 14.32 | 21.32 | 31.39 | 37.03 | 46.87 | 56.50 | 62.13 | 61.68 | 51.07 | 37.58 | 28.70 | 21.52 | 39.18 | |||||||||||||
1995 | 21.71 | 27.61 | 34.00 | 35.23 | 47.19 | 51.63 | 56.13 | 62.03 | 52.67 | 33.23 | 28.07 | 20.74 | 39.19 | |||||||||||||
1996 | 19.26 | 29.24 | 27.32 | 36.87 | 48.10 | 58.50 | 63.39 | 60.52 | 50.47 | 40.48 | 27.93 | 20.48 | 40.21 | |||||||||||||
1997 | 21.13 | 24.50 | 30.45 | 41.13 | 48.71 | 54.97 | 59.87 | 61.52 | 56.27 | 39.19 | 26.23 | 18.03 | 40.17 | |||||||||||||
1998 | 19.71 | 25.89 | 30.48 | 34.23 | 43.77 | 52.83 | 62.65 | 60.48 | 55.27 | 42.10 | 28.43 | 20.81 | 39.72 | |||||||||||||
1999 | 20.16 | 20.85 | a | 32.71 | 35.10 | 47.32 | 55.13 | 63.03 | 60.48 | 52.47 | 36.00 | 24.20 | 18.13 | 38.80 | ||||||||||||
2000 | 21.61 | 28.54 | a | 31.13 | 42.40 | 50.13 | 59.37 | 62.42 | 61.52 | 51.53 | 43.16 | 25.07 | 21.81 | 41.56 | ||||||||||||
2001 | 20.19 | 26.04 | a | 32.77 | 37.73 | 49.29 | 57.76 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.30 | f | ||||
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.41 | m | 38.89 | c | 27.66 | a | 21.89 | c | 29.48 | i |
2003 | 21.82 | c | 28.35 | b | 28.23 | e | 38.23 | d | 47.90 | b | 55.93 | c | 64.64 | c | 61.26 | d | 51.86 | a | 43.97 | 30.07 | c | 18.36 | c | 40.88 | ||
2004 | 20.18 | i | 20.00 | 36.31 | b | 40.00 | a | 46.54 | c | 53.54 | b | 59.79 | g | 56.86 | j | 48.68 | e | 39.45 | 29.61 | b | 18.55 | k | 39.27 | d | ||
2005 | 27.46 | c | 29.46 | d | 29.96 | d | 33.85 | q | 44.82 | i | 54.24 | i | 59.43 | q | 58.83 | h | 52.41 | c | 42.66 | b | 25.63 | 18.81 | 32.34 | e | ||
2006 | 19.57 | a | 21.21 | 32.48 | d | 38.76 | i | 47.85 | d | 57.73 | d | 62.90 | b | 61.93 | c | 50.00 | d | 40.35 | e | 27.88 | d | 18.14 | c | 40.00 | a | |
2007 | 20.78 | d | 26.08 | d | 30.96 | d | 37.62 | d | 47.86 | b | 56.90 | i | 61.13 | a | 62.42 | l | 53.96 | g | 35.67 | g | 28.96 | e | 21.00 | d | 34.30 | d |
2008 | 16.35 | ----- | z | 27.58 | e | 33.89 | k | 44.68 | f | 56.89 | c | 62.75 | c | 61.22 | d | 51.33 | f | 38.35 | h | 28.76 | e | 24.04 | f | 42.26 | f | |
2009 | 17.90 | b | 20.67 | g | 32.32 | i | 35.57 | g | 50.74 | d | ----- | z | 62.17 | h | ----- | z | ----- | z | ----- | z | 24.04 | e | ----- | z | 30.89 | i |
2010 | 18.75 | c | 24.75 | d | 28.39 | h | 36.24 | i | 43.24 | n | 54.82 | h | 63.96 | h | 59.43 | j | ----- | z | ----- | z | ----- | z | ----- | z | 21.75 | j |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.17 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | 50.29 | j | 58.65 | m | 62.34 | b | 59.58 | g | 52.59 | c | 33.17 | g | 23.68 | e | 16.23 | i | 46.21 | i |
2014 | 9.64 | i | 26.50 | r | 33.14 | x | 32.78 | u | 43.76 | j | 56.63 | k | 62.31 | e | 59.00 | i | 57.53 | 41.92 | f | 20.78 | g | 21.43 | j | 59.92 | j | |
2015 | 20.90 | j | 23.94 | l | 29.93 | p | 36.57 | w | 45.50 | s | 56.00 | s | ----- | z | ----- | z | 54.04 | d | 46.33 | v | ----- | z | ----- | z | 54.04 | k |
2016 | ----- | z | ----- | z | ----- | z | 38.25 | v | 42.96 | h | 57.91 | g | 63.32 | i | 56.95 | j | 52.64 | e | 42.08 | r | ----- | z | ----- | z | 52.64 | k |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.94 | n | 60.62 | w | 58.94 | n | 53.68 | h | 43.88 | e | 25.11 | l | ----- | z | 43.88 | k |
2019 | 27.56 | v | ----- | z | 35.00 | c | 38.76 | m | 43.46 | e | 54.11 | c | 62.21 | c | 59.10 | 54.15 | c | 35.10 | 25.29 | f | 22.29 | c | 45.68 | d | ||
2020 | 17.13 | h | 21.95 | i | 36.04 | g | 38.80 | e | 47.83 | b | 53.72 | e | 63.79 | g | 59.81 | e | 47.52 | c | 33.52 | b | 27.60 | j | 12.83 | m | 46.87 | f |
2021 | 14.84 | l | 19.53 | k | 24.16 | l | 36.00 | i | 47.16 | f | 58.77 | q | 63.00 | j | 59.13 | h | 55.31 | d | 37.38 | g | 25.14 | h | 19.09 | i | 55.31 | k |
2022 | 13.24 | n | ----- | z | ----- | z | ----- | z | 44.40 | f | 59.08 | f | 62.44 | v | 65.41 | n | 57.90 | j | 43.75 | k | 22.05 | j | 21.54 | r | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.95 | 23.30 | 29.12 | 35.40 | 44.20 | 51.41 | 59.78 | 58.07 | 50.40 | 37.39 | 26.10 | 19.75 | 37.70 | |||||||||||||
S.D. | 5.87 | 4.88 | 4.20 | 3.86 | 4.35 | 4.76 | 2.96 | 3.76 | 3.67 | 4.82 | 4.24 | 5.61 | 3.08 | |||||||||||||
SKEW | 1.19 | 0.51 | -0.29 | 0.00 | -0.26 | -0.37 | -0.15 | 0.37 | 0.02 | 0.11 | 1.76 | 1.49 | 0.35 | |||||||||||||
MAX | 39.11 | 39.93 | 38.29 | 42.70 | 51.42 | 59.37 | 66.97 | 70.00 | 57.53 | 50.23 | 44.86 | 40.34 | 45.69 | |||||||||||||
MIN | 7.46 | 11.62 | 20.06 | 27.80 | 35.28 | 38.33 | 52.13 | 51.26 | 41.00 | 27.76 | 18.21 | 8.93 | 32.83 | |||||||||||||
YRS | 41 | 41 | 42 | 41 | 45 | 44 | 44 | 42 | 48 | 45 | 44 | 39 | 30 |