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 | 67.28 | a | 51.21 | 39.92 | 32.34 | 47.69 | h | |||
1940 | 12.03 | 25.03 | 29.39 | 46.47 | 58.73 | 71.40 | 76.32 | 71.08 | 65.33 | 56.32 | 34.37 | 26.84 | 47.78 | |||||||||||||
1941 | 22.98 | 21.54 | 31.08 | 54.38 | a | 65.58 | a | 71.00 | b | 75.65 | 74.39 | 67.02 | 54.58 | 40.90 | 31.38 | a | 50.87 | |||||||||
1942 | 21.61 | 22.39 | 38.44 | 55.13 | 59.21 | 69.70 | 74.06 | 72.66 | 61.22 | 52.65 | a | 38.13 | 18.20 | p | 51.38 | a | ||||||||||
1943 | 12.32 | f | 22.63 | a | 27.81 | 47.58 | 58.52 | a | 72.84 | a | 76.35 | 73.69 | 59.95 | a | 51.67 | a | 33.40 | 26.22 | a | 50.06 | a | |||||
1944 | ----- | z | 26.14 | 29.90 | 45.50 | a | 63.92 | a | 72.47 | 72.73 | 73.71 | 64.98 | 53.55 | c | 40.88 | i | 21.64 | c | 52.45 | b | ||||||
1945 | 16.53 | a | 22.80 | 43.48 | a | 48.69 | a | 55.24 | 64.02 | 72.00 | b | 72.39 | 62.82 | 50.55 | 36.73 | 21.28 | h | 49.57 | a | |||||||
1946 | 22.56 | 24.48 | 44.48 | 53.47 | 57.89 | 68.78 | 73.84 | 69.15 | 62.36 | a | 56.11 | 38.64 | a | 26.66 | 49.87 | |||||||||||
1947 | 24.55 | 16.71 | b | 30.98 | a | 45.83 | a | 55.24 | 66.30 | c | 72.95 | a | 79.05 | 66.22 | a | 60.82 | 31.88 | 23.97 | 47.88 | |||||||
1948 | 15.20 | a | 20.66 | 32.03 | b | 53.80 | b | 59.75 | a | 68.55 | 75.26 | 73.84 | 68.25 | 51.15 | 39.72 | 23.97 | 48.51 | |||||||||
1949 | 19.44 | 20.18 | 33.73 | 48.57 | 62.87 | a | 72.75 | 76.90 | 73.95 | 59.32 | 55.45 | 39.30 | 26.00 | 49.04 | ||||||||||||
1950 | 19.58 | 20.86 | 28.39 | 40.83 | 58.71 | 67.77 | 69.76 | 67.82 | 62.90 | 56.08 | 31.72 | 15.84 | 45.02 | |||||||||||||
1951 | 13.24 | 20.16 | 27.00 | a | 43.05 | 62.39 | 65.25 | 71.93 | a | 68.08 | 59.57 | 51.52 | 28.30 | 20.61 | 44.26 | |||||||||||
1952 | 19.21 | 27.78 | 29.60 | 48.77 | 58.37 | 70.55 | 74.47 | 69.65 | 63.53 | 46.15 | 39.37 | 26.44 | 47.82 | |||||||||||||
1953 | 22.44 | 23.25 | 34.65 | 42.98 | 59.52 | 71.38 | 72.95 | 72.34 | 62.80 | 56.89 | 41.23 | 27.19 | 48.97 | |||||||||||||
1954 | 17.94 | 34.34 | 32.00 | 50.72 | 54.58 | 72.22 | 74.74 | 70.73 | 64.12 | 50.42 | 40.08 | 26.52 | 49.03 | |||||||||||||
1955 | 19.95 | 20.54 | 30.82 | ----- | z | 63.26 | 67.90 | 79.44 | 76.24 | 64.75 | 52.82 | 31.33 | 18.29 | 47.76 | a | |||||||||||
1956 | 18.18 | 19.98 | 28.23 | 44.53 | 59.84 | 72.75 | 70.85 | 71.84 | 60.53 | 57.94 | 35.92 | 27.10 | 47.31 | |||||||||||||
1957 | 14.53 | 27.91 | a | 33.85 | 49.40 | 58.12 | a | 69.28 | 76.85 | 71.82 | a | 61.63 | 49.97 | 35.90 | 29.15 | 48.20 | ||||||||||
1958 | 23.02 | 18.39 | 34.44 | 49.58 | 61.70 | a | 65.10 | 71.53 | 72.74 | 64.35 | 55.35 | 39.30 | 17.98 | 47.79 | ||||||||||||
1959 | 13.22 | a | 16.71 | 30.48 | 48.40 | 64.05 | 70.74 | a | 72.19 | 75.02 | 63.98 | 46.66 | 27.93 | 31.65 | 46.75 | |||||||||||
1960 | 22.58 | 23.12 | 23.24 | 49.37 | 58.34 | 65.93 | 72.13 | 73.05 | 65.40 | 51.77 | 39.50 | 23.16 | 47.30 | |||||||||||||
1961 | 18.61 | 28.43 | 35.81 | 43.05 | 58.16 | 69.87 | 72.81 | 73.47 | 63.07 | 54.32 | 37.48 | 21.02 | 48.01 | |||||||||||||
1962 | 14.92 | 19.41 | 30.06 | 46.53 | 65.26 | 68.90 | 70.40 | 71.13 | 60.85 | 54.94 | 38.57 | 23.24 | 47.02 | |||||||||||||
1963 | 7.92 | 16.18 | 36.69 | 50.50 | 58.73 | 72.02 | 74.40 | 70.05 | a | 63.73 | 61.55 | a | 41.70 | 14.13 | 47.30 | |||||||||||
1964 | 25.40 | 27.52 | 31.95 | 49.13 | 65.18 | 69.98 | 75.60 | 69.21 | 62.12 | 49.53 | 38.81 | a | 19.55 | 48.67 | ||||||||||||
1965 | 15.45 | 17.34 | 25.32 | 43.95 | a | 63.15 | 68.08 | 71.90 | 69.44 | 58.48 | 52.10 | 37.53 | 31.00 | 46.15 | ||||||||||||
1966 | 9.77 | 19.77 | 37.12 | b | 44.62 | 55.69 | 69.48 | 74.48 | 69.27 | 61.50 | 51.15 | 36.78 | 23.42 | 46.09 | ||||||||||||
1967 | 21.21 | 14.25 | 34.42 | 48.52 | 55.23 | 68.57 | 69.90 | 66.85 | 60.78 | 48.92 | 33.17 | 25.60 | 45.62 | |||||||||||||
1968 | 18.94 | 19.09 | 41.00 | 50.27 | 56.16 | 67.67 | 71.53 | 71.42 | a | 61.73 | 52.48 | 36.17 | 21.82 | 47.36 | ||||||||||||
1969 | 13.35 | 21.66 | 26.31 | 49.23 | 59.81 | 61.15 | 71.85 | 71.55 | 62.00 | 47.65 | 35.23 | 23.29 | 45.26 | |||||||||||||
1970 | 9.65 | 20.57 | a | 30.81 | 48.52 | 60.60 | 69.77 | 73.66 | 71.13 | 61.52 | 52.60 | 35.92 | 20.98 | 46.31 | ||||||||||||
1971 | 9.40 | 18.14 | 28.79 | 47.68 | 56.45 | 73.15 | 68.82 | 68.82 | 64.60 | 56.98 | a | 36.95 | a | 25.13 | 46.24 | |||||||||||
1972 | 11.87 | 15.55 | 28.66 | 43.20 | 61.71 | 65.47 | 69.81 | 70.02 | 61.65 | 46.84 | 34.73 | 16.35 | 43.82 | |||||||||||||
1973 | 20.82 | 24.77 | 41.63 | 45.17 | 55.44 | 69.95 | 73.45 | 72.77 | 62.23 | 56.79 | 37.15 | 20.76 | 48.41 | |||||||||||||
1974 | 17.31 | 20.00 | 33.26 | 48.78 | 55.48 | 65.38 | 75.60 | a | 69.08 | 58.00 | 51.67 | a | 37.67 | 26.27 | 46.54 | |||||||||||
1975 | 18.92 | 19.04 | 25.56 | 41.30 | 62.00 | 68.38 | 73.40 | 72.21 | 59.17 | 54.52 | 41.23 | 24.82 | 46.71 | |||||||||||||
1976 | 16.26 | 29.78 | 36.02 | 50.80 | 57.52 | 69.85 | 73.03 | a | 69.48 | 60.32 | 45.29 | 28.70 | 13.23 | 45.86 | ||||||||||||
1977 | 2.29 | 22.36 | 40.21 | 54.98 | a | 66.56 | 66.80 | 75.08 | 67.06 | 62.05 | 49.90 | 34.70 | 18.53 | 46.71 | ||||||||||||
1978 | 7.44 | 11.59 | 29.65 | 46.70 | 60.18 | 68.25 | 71.32 | 71.13 | 66.28 | 49.31 | 34.97 | 19.68 | 44.71 | |||||||||||||
1979 | 4.95 | 12.34 | 31.50 | 43.58 | 58.11 | 68.33 | 71.84 | 69.26 | 64.86 | a | 49.74 | 35.32 | 28.63 | 44.87 | ||||||||||||
1980 | 17.97 | 17.31 | 29.68 | 48.69 | a | 61.47 | 69.10 | a | 75.00 | 71.61 | 63.38 | b | 47.66 | 38.40 | 23.47 | 46.98 | ||||||||||
1981 | 20.45 | 25.91 | 37.97 | 51.74 | a | 57.77 | a | 68.73 | 72.39 | 70.76 | 60.98 | a | 48.03 | 38.40 | 21.18 | 47.86 | ||||||||||
1982 | 6.32 | 18.70 | 31.15 | a | 43.64 | a | 62.02 | a | 63.52 | a | 72.84 | 71.25 | a | 61.95 | 52.75 | a | 36.16 | a | 30.64 | c | 45.91 | |||||
1983 | 23.32 | c | 29.00 | 35.68 | a | 43.33 | a | 54.81 | 68.78 | a | 77.16 | 76.90 | 64.29 | a | 51.31 | d | 37.83 | 9.16 | b | 47.63 | ||||||
1984 | 16.34 | c | 30.12 | 28.08 | 48.40 | 56.66 | b | 70.58 | 71.23 | 73.53 | 61.35 | 53.73 | a | 34.96 | b | 23.20 | a | 47.35 | ||||||||
1985 | 12.05 | 17.43 | a | 37.05 | a | 54.05 | 63.94 | 66.77 | 73.85 | 69.57 | a | 63.57 | 52.22 | a | 29.92 | 10.76 | 45.93 | |||||||||
1986 | 19.61 | 19.93 | 37.41 | b | 52.43 | 61.48 | 70.05 | 75.27 | 67.73 | a | 63.28 | a | 52.00 | 31.60 | a | 25.87 | 48.06 | |||||||||
1987 | 22.65 | a | 31.16 | 39.02 | b | 53.64 | a | 64.06 | 73.20 | 76.45 | 70.42 | 63.12 | 46.52 | 40.62 | 28.48 | 50.78 | ||||||||||
1988 | 14.71 | b | 16.71 | 36.26 | 48.70 | 64.45 | 72.42 | 75.82 | 76.18 | 64.27 | 45.77 | 37.68 | 23.60 | 48.05 | ||||||||||||
1989 | 27.06 | 14.50 | 30.34 | 46.45 | a | 58.31 | b | 67.62 | 75.23 | 71.45 | a | 60.77 | 52.24 | 32.02 | b | 14.10 | 45.84 | |||||||||
1990 | 28.89 | 26.27 | 37.79 | 49.07 | 56.37 | 69.50 | 72.79 | 71.18 | 65.20 | 50.27 | 41.73 | 20.37 | 49.12 | |||||||||||||
1991 | 13.87 | 26.36 | 36.84 | 50.83 | 63.35 | 73.29 | a | 72.94 | 71.90 | b | 61.28 | 49.77 | 28.27 | 25.16 | 47.82 | |||||||||||
1992 | 24.31 | 30.16 | 34.92 | a | 45.18 | 60.62 | a | 65.58 | 68.32 | 67.10 | 60.73 | b | 50.13 | 33.05 | 23.65 | 46.98 | ||||||||||
1993 | 18.30 | a | 18.32 | 32.07 | d | 44.60 | a | 59.00 | j | 68.13 | g | 71.42 | a | 72.90 | a | 58.22 | a | 49.50 | 34.67 | 25.52 | 42.55 | b | ||||
1994 | 7.58 | 13.55 | 34.97 | b | 48.86 | b | 59.43 | c | 71.02 | 70.15 | 67.87 | a | 65.09 | a | 53.25 | e | 40.57 | 28.31 | 46.72 | |||||||
1995 | 19.92 | a | 23.96 | c | 36.24 | b | 44.44 | c | 58.29 | 72.86 | a | 74.03 | 77.09 | b | 61.08 | 50.16 | 29.53 | 20.83 | a | 47.37 | ||||||
1996 | 11.53 | a | 20.38 | a | 28.06 | 43.72 | c | 55.95 | 68.50 | 70.19 | 70.77 | a | 62.35 | 51.53 | 28.95 | b | 19.77 | a | 44.31 | |||||||
1997 | 14.63 | a | 25.02 | 33.63 | a | 45.30 | e | 54.79 | 69.65 | 72.35 | a | 67.60 | a | 63.57 | a | 52.27 | 33.02 | a | 29.00 | b | 46.74 | |||||
1998 | 23.21 | 33.32 | 35.34 | 51.77 | 65.05 | a | 67.03 | 73.57 | a | 72.45 | 68.02 | 52.97 | 40.74 | a | 29.90 | a | 51.11 | |||||||||
1999 | 15.65 | a | 31.23 | 35.69 | 51.10 | 61.35 | a | 68.97 | 77.08 | a | 70.10 | a | 61.89 | b | 51.27 | 43.38 | 27.29 | 49.58 | ||||||||
2000 | 19.48 | 29.44 | c | 42.20 | a | 49.23 | b | 61.35 | 67.30 | 72.08 | ----- | z | 63.34 | a | 54.07 | b | 34.80 | 10.69 | 45.82 | a | ||||||
2001 | 21.65 | 18.67 | a | 30.85 | a | 51.97 | a | 60.58 | a | 68.28 | 74.80 | a | 73.32 | a | 61.14 | a | 49.48 | 48.21 | a | 30.45 | 49.12 | |||||
2002 | 29.44 | 31.91 | 30.27 | 48.07 | a | 56.92 | 71.07 | a | 76.13 | 71.38 | e | 65.41 | b | 44.81 | d | 35.64 | b | 27.87 | a | 49.08 | ||||||
2003 | 16.98 | a | 17.27 | b | 32.55 | c | 48.15 | d | 58.71 | b | 66.45 | b | 72.31 | b | 73.98 | b | 61.73 | d | 51.74 | b | 35.76 | e | 27.40 | a | 46.92 | |
2004 | 16.08 | 23.93 | b | 38.37 | a | 50.02 | a | 59.28 | b | 66.30 | c | 70.00 | 66.95 | b | 66.88 | d | 51.79 | b | 39.91 | b | 26.25 | e | 47.98 | |||
2005 | 17.94 | 28.52 | 32.34 | 51.83 | c | 58.08 | e | 74.41 | b | 74.91 | c | 71.98 | a | 67.73 | 54.22 | b | 38.93 | b | 21.45 | a | 49.36 | |||||
2006 | 32.82 | a | 24.29 | 35.79 | b | 54.15 | d | 60.41 | c | 69.91 | b | 78.19 | 71.78 | d | 61.52 | c | 47.35 | a | 40.16 | a | 31.45 | 50.65 | ||||
2007 | 24.06 | 14.18 | 39.40 | 47.92 | 64.32 | 71.05 | 73.74 | 73.48 | 66.43 | 57.39 | 36.50 | 20.77 | 49.10 | |||||||||||||
2008 | 16.11 | 16.93 | 30.61 | 47.13 | 57.41 | d | 69.71 | a | 73.79 | 71.13 | a | 64.70 | 51.31 | 34.94 | c | 16.25 | a | 45.84 | ||||||||
2009 | 10.24 | 24.46 | a | 37.05 | b | 48.55 | a | 59.71 | 68.35 | 68.06 | 69.52 | 65.24 | a | 45.35 | 44.13 | 20.98 | c | 46.81 | ||||||||
2010 | 15.73 | 21.48 | b | 41.23 | 56.07 | 61.18 | a | 70.58 | 75.98 | a | 76.52 | 63.33 | 55.43 | a | 38.93 | c | 18.84 | 49.61 | ||||||||
2011 | 15.13 | 20.59 | 33.45 | 48.13 | 60.22 | a | 71.36 | b | 78.18 | 73.18 | a | 61.14 | a | 53.82 | 40.77 | 30.65 | 48.88 | |||||||||
2012 | 25.44 | 29.83 | 51.03 | 51.85 | 65.77 | 72.43 | 79.79 | 72.10 | 62.25 | 49.76 | 39.83 | 28.13 | 52.35 | |||||||||||||
2013 | 21.55 | 21.32 | 27.17 | a | 42.60 | 60.00 | 68.57 | 73.71 | 72.44 | 67.15 | 51.79 | 34.92 | 17.18 | 46.53 | ||||||||||||
2014 | 10.48 | 10.98 | 29.26 | 46.53 | 60.24 | 71.58 | 70.69 | 72.48 | a | 63.22 | 50.22 | a | 29.74 | a | 27.65 | 45.26 | ||||||||||
2015 | 20.48 | 12.41 | 35.45 | 50.22 | a | 62.44 | 69.12 | a | 72.63 | a | 70.58 | a | 69.40 | 53.66 | 43.78 | 34.29 | 49.54 | |||||||||
2016 | 20.61 | 26.62 | 42.07 | x | 49.88 | 60.37 | 71.37 | 74.06 | 73.03 | 64.80 | 54.74 | 44.82 | 21.29 | 51.05 | a | |||||||||||
2017 | 21.97 | a | 35.02 | c | 37.17 | a | 52.82 | 58.95 | 71.57 | 74.70 | a | 69.84 | 68.15 | 55.71 | 37.70 | 23.98 | 50.63 | |||||||||
2018 | 19.47 | 20.77 | 34.00 | 39.00 | b | 66.88 | b | 73.02 | 75.05 | 73.94 | 66.71 | a | 48.83 | b | 33.67 | j | 30.72 | h | 51.76 | b | ||||||
2019 | 9.50 | y | 11.66 | l | 27.76 | 46.53 | a | 55.29 | 67.07 | 75.34 | 69.98 | 66.37 | 47.55 | 30.23 | 27.47 | a | 51.36 | b | ||||||||
2020 | 22.45 | a | 20.90 | 37.92 | 43.93 | a | 56.87 | 69.73 | 75.30 | a | 71.90 | a | 60.63 | 44.94 | 41.43 | a | 26.18 | 47.68 | ||||||||
2021 | 21.81 | 9.48 | 39.87 | 47.82 | 57.94 | 72.90 | 72.78 | b | 71.61 | 64.33 | 56.47 | 37.05 | 28.13 | 48.35 | ||||||||||||
2022 | 8.95 | 15.24 | a | 33.29 | 41.83 | a | 60.05 | 69.72 | c | 72.48 | 70.89 | 64.18 | 49.34 | 37.42 | 19.18 | 45.21 | ||||||||||
2023 | 23.53 | 23.27 | 32.38 | a | 47.24 | a | 59.71 | 69.62 | 71.02 | 71.98 | 66.59 | a | 53.19 | 37.85 | 33.26 | 49.14 | ||||||||||
2024 | 20.98 | 34.05 | 38.65 | 47.03 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.23 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.74 | 22.07 | 33.75 | 48.08 | 59.88 | 69.35 | 73.52 | 71.55 | 63.29 | 51.79 | 36.76 | 23.79 | 47.57 | |||||||||||||
S.D. | 5.84 | 5.83 | 4.91 | 3.69 | 3.12 | 2.55 | 2.43 | 2.46 | 2.53 | 3.49 | 4.16 | 5.41 | 1.77 | |||||||||||||
SKEW | -0.24 | 0.20 | 0.56 | -0.04 | 0.29 | -0.49 | 0.14 | 0.38 | 0.21 | 0.19 | -0.16 | -0.52 | 0.21 | |||||||||||||
MAX | 32.82 | 35.02 | 51.03 | 56.07 | 66.88 | 74.41 | 79.79 | 79.05 | 69.40 | 61.55 | 48.21 | 34.29 | 52.35 | |||||||||||||
MIN | 2.29 | 9.48 | 23.24 | 39.00 | 54.58 | 61.15 | 68.06 | 66.85 | 58.00 | 44.81 | 27.93 | 9.16 | 43.82 | |||||||||||||
YRS | 82 | 84 | 84 | 83 | 83 | 83 | 84 | 83 | 85 | 85 | 83 | 82 | 74 |