YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.78 | c | ----- | z | 12.57 | 14.10 | b | 23.15 | i | |
1939 | 8.80 | a | 1.64 | 21.29 | 30.07 | 35.23 | 45.07 | 50.73 | a | 48.52 | f | 45.21 | b | 26.52 | b | 19.07 | c | 11.07 | a | 26.79 | a | |||||
1940 | 12.03 | a | 13.54 | e | 22.20 | f | 26.90 | 35.96 | d | 43.77 | h | 48.07 | q | 48.80 | p | 44.24 | a | 34.00 | g | 20.43 | 17.71 | 24.40 | e | |||
1941 | 12.20 | a | 20.89 | a | 23.96 | c | 31.00 | d | 40.77 | 41.81 | c | 48.32 | 47.84 | 41.90 | 33.42 | 18.97 | a | 14.77 | 31.32 | |||||||
1942 | 9.21 | b | 13.96 | a | 18.34 | b | 29.77 | 32.20 | a | 40.24 | a | 49.10 | a | 49.14 | b | 37.96 | c | 29.44 | d | 16.72 | a | ----- | z | 29.64 | a | |
1943 | ----- | z | 20.12 | c | 26.10 | a | 30.67 | 36.87 | 44.07 | a | 51.59 | b | 52.81 | 41.00 | 28.52 | 17.72 | a | 14.68 | 33.10 | a | ||||||
1944 | 5.74 | 19.31 | 20.23 | 26.73 | 35.19 | 40.67 | 49.32 | 48.39 | 39.90 | 32.94 | 19.73 | 12.42 | 29.21 | |||||||||||||
1945 | 12.26 | 21.57 | 21.10 | 24.07 | 34.94 | 37.13 | 49.26 | 51.35 | 38.17 | 29.77 | 13.03 | 2.06 | 27.89 | |||||||||||||
1946 | 2.10 | 9.50 | 20.13 | 31.40 | 32.52 | 40.63 | 51.00 | 51.03 | 41.43 | 27.45 | 17.80 | 12.70 | a | 28.14 | ||||||||||||
1947 | 2.42 | 17.54 | 18.71 | 24.04 | c | 35.58 | 37.93 | c | 50.50 | m | 49.68 | 40.13 | 29.61 | 11.97 | 7.90 | 25.05 | a | |||||||||
1948 | 9.13 | a | 14.79 | 14.29 | 28.00 | 34.67 | j | 40.79 | a | 47.00 | 47.00 | a | 39.70 | 28.55 | 12.44 | c | 13.29 | 26.82 | a | |||||||
1949 | 7.87 | 6.70 | a | 20.87 | 26.80 | 32.87 | 40.31 | d | 50.23 | 45.45 | 42.83 | 27.35 | 16.66 | a | 7.84 | 27.15 | ||||||||||
1950 | 10.71 | 17.25 | 17.84 | 24.24 | a | 30.00 | 39.73 | d | 49.55 | 41.69 | b | 38.07 | 31.84 | 15.96 | b | 11.32 | c | 27.35 | ||||||||
1951 | 10.77 | 16.11 | a | 18.00 | 26.86 | a | 34.40 | a | 38.27 | 52.35 | 49.58 | 35.85 | c | 27.93 | a | 15.10 | 9.07 | b | 27.86 | |||||||
1952 | 19.13 | a | 14.08 | d | 15.36 | i | 29.04 | f | 36.39 | 45.03 | 49.87 | 52.84 | 38.93 | 25.06 | 14.80 | 8.52 | 30.47 | b | ||||||||
1953 | 13.94 | 12.61 | 20.70 | a | 24.77 | 31.07 | b | 44.33 | 54.10 | 47.68 | 38.23 | 29.26 | 19.45 | a | 5.10 | 28.44 | ||||||||||
1954 | 11.48 | 17.96 | 19.06 | 29.03 | a | 36.13 | 42.70 | 53.77 | a | 47.57 | a | 43.47 | 30.20 | a | 18.27 | 8.41 | b | 29.84 | ||||||||
1955 | 5.03 | a | 4.86 | 19.19 | 22.40 | 33.52 | 38.97 | 51.39 | 49.13 | 36.83 | 26.55 | b | 14.50 | b | 9.45 | 25.98 | ||||||||||
1956 | 18.19 | 7.21 | 17.74 | 22.67 | 32.58 | 43.03 | 48.13 | 44.97 | 35.30 | 24.42 | 9.13 | 3.84 | 25.60 | |||||||||||||
1957 | 14.10 | 22.04 | 18.68 | 24.07 | 34.06 | 41.13 | 53.04 | e | 52.81 | 52.24 | i | 33.90 | j | 19.87 | 16.71 | c | 29.65 | b | ||||||||
1958 | 10.74 | 19.15 | a | 21.83 | a | 26.07 | 35.68 | 45.33 | 47.65 | 52.43 | h | 41.77 | 29.10 | 13.17 | 5.17 | a | 26.88 | a | ||||||||
1959 | 7.61 | h | 15.41 | a | 17.10 | 28.97 | 37.39 | 48.73 | 51.87 | a | 53.58 | 42.40 | 31.84 | 17.70 | 12.39 | 32.49 | a | |||||||||
1960 | 2.55 | 8.48 | b | 23.52 | 28.73 | 34.42 | 46.20 | 51.26 | 49.74 | 44.63 | 31.33 | a | 21.13 | 12.38 | b | 29.53 | ||||||||||
1961 | 6.94 | 14.48 | a | 24.06 | 27.21 | a | 35.84 | 46.03 | 51.77 | 51.39 | 37.53 | 28.84 | 22.10 | 8.42 | 29.55 | |||||||||||
1962 | 6.48 | 18.52 | a | 15.13 | 27.63 | 33.26 | 43.30 | 51.00 | 49.45 | 44.80 | 33.84 | 23.97 | 14.52 | 30.16 | ||||||||||||
1963 | 2.30 | a | 17.11 | a | 21.07 | a | 26.07 | 36.68 | 40.63 | 52.77 | 50.68 | 45.73 | 34.26 | 20.40 | 10.00 | r | 31.61 | a | ||||||||
1964 | 7.72 | m | 5.72 | 16.84 | ----- | z | 38.32 | 43.93 | 54.65 | 51.13 | 45.33 | 30.97 | 22.53 | 14.39 | 32.38 | b | ||||||||||
1965 | 18.19 | ----- | z | 18.84 | 28.83 | 34.81 | 41.77 | 52.13 | 47.23 | 40.37 | 32.00 | 26.77 | 17.17 | a | 32.55 | a | ||||||||||
1966 | 7.61 | 9.68 | 22.39 | 29.00 | 39.90 | 46.30 | 54.96 | d | 52.23 | 41.50 | 29.03 | 23.53 | 13.52 | 30.80 | ||||||||||||
1967 | 8.39 | 18.00 | a | 23.90 | a | 27.83 | 34.00 | 46.17 | 55.39 | 51.10 | 43.23 | 30.29 | 21.40 | 5.73 | a | 30.45 | ||||||||||
1968 | 9.81 | 19.76 | 23.26 | 27.20 | 34.67 | a | 43.97 | 51.68 | ----- | z | 38.90 | 30.97 | 20.27 | 7.13 | 27.96 | a | ||||||||||
1969 | 19.40 | a | 17.32 | 17.77 | 30.33 | 38.45 | 43.83 | 54.10 | 52.13 | 45.30 | 30.06 | 19.59 | a | 19.06 | 32.28 | |||||||||||
1970 | 15.93 | a | 19.00 | a | 19.68 | 23.23 | 35.48 | 45.30 | 52.74 | 52.45 | 39.63 | 27.74 | 21.73 | 13.58 | 30.54 | |||||||||||
1971 | 8.71 | c | 12.96 | 19.71 | 27.10 | 33.55 | 45.77 | 53.87 | 49.29 | 42.60 | 30.39 | 20.53 | 12.94 | 29.79 | ||||||||||||
1972 | 13.40 | a | 17.76 | 23.71 | 24.80 | 33.81 | 45.80 | 53.71 | 52.03 | 45.57 | 37.83 | b | 18.30 | 10.84 | 31.46 | |||||||||||
1973 | 8.18 | i | 17.50 | l | 22.09 | h | 23.30 | j | 36.52 | 43.83 | 50.87 | ----- | z | 40.63 | 31.39 | 24.20 | e | 12.03 | 34.21 | e | ||||||
1974 | 11.72 | b | 11.86 | 26.10 | a | 26.87 | 37.10 | 47.30 | 51.48 | 48.42 | 41.30 | 37.39 | 22.17 | 9.42 | 30.93 | |||||||||||
1975 | 7.43 | a | 12.63 | a | 23.94 | 25.40 | 31.87 | 35.37 | 48.74 | 45.00 | a | 38.53 | 23.87 | 11.92 | d | 6.42 | l | 27.70 | a | |||||||
1976 | 1.45 | k | 19.06 | k | 14.67 | g | 25.73 | 34.81 | 37.90 | a | 47.52 | 47.26 | 41.43 | 23.03 | 8.86 | a | 1.46 | e | 29.78 | c | ||||||
1977 | -2.32 | c | 10.07 | 15.19 | 28.03 | 33.06 | 39.30 | 46.90 | ----- | z | 38.10 | 26.32 | 18.97 | a | 11.33 | g | 25.36 | b | ||||||||
1978 | 12.81 | e | 8.20 | c | 24.79 | c | 25.87 | 31.48 | 41.77 | 48.77 | 43.94 | 38.87 | 27.47 | a | 24.55 | a | 4.89 | c | 27.78 | |||||||
1979 | -0.58 | 4.07 | 19.45 | 26.13 | 35.23 | a | 39.62 | a | 45.77 | 46.19 | 39.83 | 25.97 | 12.24 | a | 10.56 | f | 26.72 | a | ||||||||
1980 | ----- | z | ----- | z | 16.95 | j | 22.75 | f | 31.74 | d | 39.63 | 47.19 | 45.65 | 38.20 | 24.00 | a | 15.37 | c | 15.38 | e | 32.15 | d | ||||
1981 | 6.67 | j | 9.21 | i | 19.00 | i | 26.05 | h | 33.97 | 42.17 | 50.90 | a | 48.55 | 40.37 | 28.72 | b | 17.36 | b | 11.69 | e | 34.22 | d | ||||
1982 | 1.60 | k | 2.00 | h | 22.00 | i | 22.71 | i | 30.41 | i | 38.50 | 49.16 | 51.45 | 42.33 | 22.17 | b | 19.62 | d | 12.50 | k | 37.21 | f | ||||
1983 | 7.67 | j | 10.26 | i | 22.52 | h | 23.09 | h | 29.94 | 38.47 | 46.94 | 49.29 | 40.32 | b | 28.29 | c | 15.85 | c | 11.96 | h | 35.58 | e | ||||
1984 | -4.53 | l | 9.30 | i | 16.41 | i | 21.40 | j | 33.84 | f | 40.41 | c | 48.10 | 46.97 | 39.27 | 26.96 | d | 14.00 | e | 16.15 | k | 35.95 | f | |||
1985 | 5.00 | i | 1.74 | i | 24.81 | j | 25.14 | h | 35.50 | g | 40.33 | 47.52 | 44.17 | a | 35.83 | a | 28.77 | a | 17.93 | c | 9.77 | i | 35.76 | f | ||
1986 | 11.76 | j | 13.53 | i | 18.25 | k | 26.90 | i | 29.33 | j | 42.33 | c | 46.96 | e | 49.24 | j | 38.52 | c | 27.50 | c | 20.15 | c | 10.95 | j | 35.09 | g |
1987 | 5.58 | l | 19.00 | k | 14.84 | l | 22.50 | h | 31.25 | k | 38.36 | b | 44.42 | 44.87 | 34.70 | 27.17 | a | 18.07 | a | 10.29 | j | 34.60 | f | |||
1988 | -0.17 | m | 12.94 | m | 16.45 | i | 25.07 | b | 30.39 | m | 42.81 | c | 48.32 | 52.00 | 39.44 | c | 28.83 | b | 17.04 | c | 9.40 | a | 32.86 | d | ||
1989 | 6.55 | b | 13.91 | e | 21.61 | 28.37 | 33.84 | 40.79 | a | 48.58 | 46.34 | b | 38.23 | 25.87 | 11.38 | a | 4.17 | a | 26.64 | |||||||
1990 | 2.00 | g | 10.64 | 22.71 | 30.11 | b | 34.90 | 41.00 | 50.61 | 45.10 | 42.46 | f | 22.27 | e | 19.57 | 5.47 | p | 30.77 | c | |||||||
1991 | 0.29 | n | 10.14 | n | 19.80 | p | 24.05 | k | 32.26 | h | 42.26 | k | 49.68 | 48.90 | 40.63 | 27.03 | 16.74 | c | 12.90 | 32.65 | f | |||||
1992 | 3.94 | 20.07 | 23.87 | 28.20 | 38.65 | 39.13 | 47.19 | 46.77 | 36.97 | 27.97 | 13.57 | 8.62 | j | 29.67 | a | |||||||||||
1993 | 11.00 | u | 20.43 | n | 20.57 | j | 24.56 | n | 34.32 | 38.88 | e | 45.74 | 49.13 | a | 35.07 | 26.06 | 15.00 | 8.97 | 31.65 | d | ||||||
1994 | 6.42 | 13.00 | 22.13 | 28.70 | 36.60 | a | 43.17 | 50.13 | 51.20 | a | 40.03 | 27.00 | 18.17 | 14.47 | a | 29.25 | ||||||||||
1995 | 10.42 | 20.11 | 23.32 | 25.03 | a | 34.74 | d | 39.27 | 44.87 | 53.13 | 40.30 | 20.59 | d | 17.33 | 12.74 | 28.49 | ||||||||||
1996 | 10.43 | a | 18.24 | 15.81 | 23.23 | h | 33.55 | 45.72 | e | 52.28 | f | 49.84 | 38.87 | 28.45 | 19.86 | a | 13.29 | 27.41 | b | |||||||
1997 | 10.80 | a | 19.21 | 18.19 | 25.76 | a | 36.48 | b | 38.43 | b | 47.06 | 50.96 | g | 44.07 | 25.10 | a | 18.52 | a | 9.03 | 26.61 | a | |||||
1998 | 16.19 | 17.11 | 20.68 | 22.67 | 28.63 | a | 34.00 | g | 52.90 | 50.13 | 42.13 | 31.40 | f | 20.27 | 10.68 | 28.14 | b | |||||||||
1999 | 11.73 | a | 12.29 | 20.74 | 25.57 | 28.97 | 36.10 | 48.81 | 50.48 | 37.53 | 22.29 | 12.37 | 5.37 | a | 26.02 | |||||||||||
2000 | 12.13 | 19.92 | d | 20.77 | 27.10 | 31.60 | a | 44.10 | 47.45 | 48.10 | 38.93 | 30.96 | e | 14.47 | 10.97 | 28.88 | ||||||||||
2001 | 3.33 | a | 12.79 | 20.44 | d | 24.60 | 33.90 | 38.60 | 51.61 | 46.71 | 36.30 | 29.90 | 20.33 | 8.52 | 27.25 | |||||||||||
2002 | 8.68 | 8.43 | 15.13 | 24.53 | 29.83 | a | 40.33 | 49.90 | 45.65 | 40.77 | 29.06 | 19.03 | 10.07 | a | 26.78 | |||||||||||
2003 | 17.03 | 17.71 | 21.74 | 23.90 | 36.36 | q | 36.28 | e | 48.87 | 49.61 | 38.20 | 29.42 | e | 18.07 | 11.58 | 28.40 | a | |||||||||
2004 | 14.77 | 10.07 | 22.52 | 28.03 | 30.39 | 37.27 | 44.61 | 44.93 | d | 35.50 | 28.06 | 18.13 | 10.84 | 27.09 | ||||||||||||
2005 | 18.58 | 19.52 | a | ----- | z | ----- | z | ----- | z | ----- | z | 49.71 | 49.77 | 42.97 | 30.24 | b | 14.97 | 7.00 | f | 32.25 | e | |||||
2006 | 11.32 | 6.43 | 18.11 | c | 28.20 | 34.52 | 45.57 | 53.10 | 49.87 | 35.93 | 30.77 | 13.30 | 6.48 | b | 27.80 | |||||||||||
2007 | 4.29 | 13.69 | b | 23.42 | 28.83 | 36.06 | 40.93 | 50.52 | 49.74 | 42.27 | 26.94 | 14.27 | 10.39 | 28.45 | ||||||||||||
2008 | 5.10 | 18.45 | 17.26 | 17.67 | 29.74 | 37.03 | 49.00 | 48.68 | 36.50 | 23.55 | 17.95 | k | ----- | z | 28.30 | b | ||||||||||
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 | 9.86 | x | 18.37 | a | 24.24 | b | 25.76 | a | 35.42 | 44.47 | 54.45 | 49.83 | a | 46.87 | 34.81 | o | ----- | z | ----- | z | 37.43 | d | ||||
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.73 | a | 18.07 | a | 14.55 | 23.12 | i | |
2019 | 15.10 | 18.17 | j | 28.10 | 31.43 | 35.94 | 44.63 | 56.97 | 52.43 | c | 46.03 | 26.55 | 20.33 | 17.55 | 34.10 | a | ||||||||||
2020 | 11.35 | 18.21 | 27.81 | 29.41 | a | ----- | z | ----- | z | ----- | z | 57.94 | ----- | z | 31.43 | a | 27.32 | h | ----- | z | 29.36 | f | ||||
2021 | ----- | z | 16.07 | ----- | z | 28.80 | ----- | z | 49.57 | 54.77 | 51.00 | 45.00 | 31.65 | 21.00 | 17.71 | 35.06 | c | |||||||||
2022 | ----- | z | ----- | z | 22.65 | ----- | z | 36.23 | 45.25 | v | 55.73 | e | 53.87 | 47.23 | 33.77 | 17.73 | 17.61 | 35.60 | d | |||||||
2023 | 14.42 | 15.61 | 23.90 | ----- | z | ----- | z | 42.57 | 54.55 | 53.77 | 44.67 | 33.19 | 25.84 | k | 18.00 | g | 35.33 | d | ||||||||
2024 | 17.29 | 22.41 | 24.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.27 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.08 | 14.66 | 20.90 | 26.82 | 34.39 | 41.81 | 50.34 | 49.24 | 40.54 | 28.77 | 17.68 | 11.01 | 28.71 | |||||||||||||
S.D. | 5.11 | 5.01 | 3.17 | 2.60 | 2.58 | 3.22 | 2.90 | 2.95 | 3.15 | 3.47 | 3.69 | 4.11 | 1.74 | |||||||||||||
SKEW | -0.18 | -0.63 | 0.01 | -0.63 | -0.14 | 0.17 | 0.10 | -0.01 | 0.19 | 0.18 | -0.17 | -0.24 | 0.13 | |||||||||||||
MAX | 19.40 | 22.41 | 28.10 | 31.43 | 40.77 | 49.57 | 56.97 | 57.94 | 47.23 | 37.83 | 26.77 | 19.06 | 32.28 | |||||||||||||
MIN | -2.32 | 1.64 | 14.29 | 17.67 | 28.63 | 35.37 | 44.42 | 41.69 | 34.70 | 20.59 | 8.86 | 1.46 | 25.60 | |||||||||||||
YRS | 57 | 61 | 60 | 59 | 63 | 70 | 72 | 68 | 74 | 73 | 74 | 60 | 32 |