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 | 74.00 | a | 56.00 | 45.03 | a | 34.40 | a | 52.36 | h | |
1940 | 13.83 | a | 27.35 | c | 30.84 | 50.46 | b | 65.52 | b | 74.87 | 81.48 | 73.90 | 72.52 | a | 60.06 | 35.18 | b | 29.46 | c | 51.29 | ||||||
1941 | 25.82 | c | 23.69 | b | 34.13 | 60.00 | b | 71.07 | b | 75.69 | a | 81.13 | a | 80.48 | 71.11 | c | 57.73 | a | 44.78 | c | 34.78 | d | 55.03 | |||
1942 | 29.33 | d | 26.15 | a | 40.73 | a | 61.37 | 63.83 | a | 73.07 | c | 78.23 | 77.75 | c | 64.93 | c | 58.63 | a | 40.59 | c | 23.59 | i | 55.87 | a | ||
1943 | 20.14 | i | 29.12 | d | 32.66 | b | 51.90 | 62.90 | a | 77.29 | b | 81.80 | a | 79.69 | b | 64.97 | a | 57.50 | a | 35.36 | b | 30.48 | b | 54.88 | a | |
1944 | 32.93 | b | 29.18 | a | 32.22 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.44 | i |
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 | 84.65 | 69.03 | a | 64.61 | 45.41 | a | 31.45 | 59.03 | g | |||
1950 | 22.88 | e | 26.25 | 32.13 | 46.43 | 65.74 | 77.93 | 80.16 | 76.58 | 73.20 | 67.29 | 38.87 | 20.39 | 52.32 | ||||||||||||
1951 | 20.84 | 28.36 | 32.52 | 48.80 | ----- | z | 74.67 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.04 | g | |||||
1952 | 27.69 | b | 33.10 | 35.65 | 60.00 | 69.06 | 80.80 | 85.10 | 78.94 | 74.13 | 58.23 | ----- | z | 31.39 | 57.64 | a | ||||||||||
1953 | 28.32 | 30.39 | 40.84 | 49.40 | 70.61 | 81.90 | 82.48 | 84.10 | 76.20 | 70.48 | ----- | z | 35.03 | 59.07 | a | |||||||||||
1954 | 25.34 | b | 39.53 | m | 40.35 | 60.43 | 63.52 | 81.37 | 84.77 | 80.35 | 71.37 | 57.48 | 46.60 | 31.61 | 58.47 | a | ||||||||||
1955 | 25.14 | b | 26.46 | 35.14 | c | 63.77 | 74.65 | 77.20 | 87.77 | 86.74 | 76.00 | 62.58 | 36.83 | 24.87 | 56.43 | |||||||||||
1956 | 26.83 | a | 28.62 | 36.39 | 53.60 | 68.84 | 85.33 | 79.81 | 82.16 | 71.80 | 68.32 | 43.73 | 33.23 | 56.56 | ||||||||||||
1957 | 22.68 | 34.04 | a | 41.23 | 57.97 | 69.32 | 78.70 | 86.90 | 81.35 | 70.70 | 58.29 | 40.87 | 34.87 | 56.41 | ||||||||||||
1958 | 30.42 | 26.54 | 42.97 | 59.18 | b | 73.45 | 75.03 | 81.06 | 83.77 | 73.73 | 64.87 | 47.83 | 25.70 | a | 57.05 | |||||||||||
1959 | 20.55 | 26.68 | 41.32 | 57.90 | 72.94 | 81.83 | a | 83.45 | 84.77 | 73.63 | 53.55 | 35.50 | 38.90 | a | 55.92 | |||||||||||
1960 | 29.00 | 30.45 | 34.63 | a | 57.80 | 70.16 | 77.33 | 83.10 | 81.97 | 73.47 | 61.19 | 47.17 | 30.29 | 56.38 | ||||||||||||
1961 | 26.68 | 38.00 | 42.90 | 50.67 | 70.19 | 82.27 | 83.26 | 83.52 | 72.47 | 63.65 | 42.50 | 27.27 | a | 56.95 | ||||||||||||
1962 | 21.16 | 26.14 | 38.35 | 55.57 | 72.65 | 78.87 | 79.90 | 82.87 | 70.07 | 63.23 | 46.37 | 29.97 | 55.43 | |||||||||||||
1963 | 15.29 | 26.37 | a | 45.74 | 61.20 | 68.61 | 84.20 | 86.26 | 81.03 | 74.07 | 70.48 | 49.27 | 20.84 | 56.95 | ||||||||||||
1964 | 33.65 | 37.97 | 39.29 | 58.80 | 74.65 | 80.90 | 87.50 | a | 80.29 | 70.33 | 60.00 | 46.33 | 26.23 | 57.99 | ||||||||||||
1965 | 22.81 | 26.00 | 31.13 | 50.97 | 72.42 | 77.10 | 81.58 | 78.58 | 64.57 | 62.26 | 44.00 | 36.23 | 53.97 | |||||||||||||
1966 | 15.48 | 28.89 | 46.39 | 52.77 | 66.84 | 80.13 | 86.00 | 78.90 | 72.43 | 60.94 | 41.87 | 29.39 | 55.00 | |||||||||||||
1967 | 28.71 | 24.14 | 42.29 | 56.17 | 65.00 | 77.93 | 80.00 | 78.32 | 72.70 | 58.39 | 40.33 | 32.68 | 54.72 | |||||||||||||
1968 | 27.23 | 27.41 | 52.03 | 61.53 | 65.61 | 77.83 | 80.71 | 81.35 | 71.57 | 61.81 | 42.63 | 27.97 | 56.47 | |||||||||||||
1969 | 20.32 | 31.14 | 35.77 | 60.07 | 71.23 | 71.57 | 82.13 | 84.23 | 72.93 | 57.10 | 43.47 | 29.61 | 54.96 | |||||||||||||
1970 | 17.94 | 29.78 | a | 37.29 | 58.23 | 70.77 | 81.43 | 85.81 | 82.55 | 71.43 | 60.84 | 41.80 | 29.58 | 55.62 | ||||||||||||
1971 | 18.10 | 27.14 | 36.90 | 60.10 | a | 68.23 | 83.03 | 80.03 | 80.16 | 73.83 | 65.35 | 43.40 | 30.48 | 55.56 | ||||||||||||
1972 | 20.58 | 24.55 | 38.10 | 53.03 | 74.48 | 79.07 | 80.26 | 80.00 | 70.33 | 55.81 | 39.60 | 23.71 | 53.29 | |||||||||||||
1973 | 29.03 | 32.11 | 49.81 | 54.07 | 66.16 | 80.70 | 83.16 | 82.42 | 70.67 | 66.35 | 44.63 | 27.23 | 57.19 | |||||||||||||
1974 | 24.94 | 30.14 | 40.94 | 59.43 | 66.60 | a | 77.83 | 87.32 | 79.42 | 69.10 | 61.53 | a | 44.33 | 32.94 | 56.21 | |||||||||||
1975 | 26.87 | 27.21 | 34.39 | 50.00 | 72.65 | 78.30 | 85.23 | 82.16 | 67.87 | 65.35 | 48.97 | 28.63 | a | 55.64 | ||||||||||||
1976 | 23.61 | 37.10 | 42.84 | 62.10 | a | 69.38 | b | 80.72 | a | 85.42 | 81.35 | 72.63 | 54.30 | a | 37.34 | a | 23.37 | a | 55.85 | |||||||
1977 | 11.19 | 32.15 | a | 47.10 | 64.76 | a | 79.11 | c | 78.14 | a | 84.26 | d | 77.23 | a | 70.90 | a | 58.52 | 41.73 | 25.13 | 55.85 | ||||||
1978 | 16.58 | 22.04 | 40.10 | 55.90 | 72.03 | 79.17 | 80.71 | 82.48 | 78.23 | 59.61 | 42.80 | 24.20 | a | 54.49 | ||||||||||||
1979 | 11.23 | a | 21.29 | 38.00 | 53.30 | 67.58 | 78.23 | 82.35 | 77.90 | 73.80 | 57.52 | 41.60 | 35.81 | 53.22 | ||||||||||||
1980 | 23.74 | 25.21 | 37.55 | 60.57 | 75.30 | a | 79.50 | 86.74 | 81.27 | a | 73.03 | 55.35 | 46.33 | 28.94 | 56.13 | |||||||||||
1981 | 29.90 | 32.82 | 47.29 | 60.86 | a | 69.23 | 78.63 | 82.03 | 79.74 | 71.00 | 57.00 | 47.43 | 27.00 | 56.91 | ||||||||||||
1982 | 16.43 | c | 26.56 | a | 38.27 | a | 53.80 | 73.48 | 75.43 | ----- | z | 81.83 | a | 69.97 | a | 60.70 | a | 42.13 | 33.90 | b | 52.05 | a | ||||
1983 | 29.10 | a | 34.25 | 41.70 | a | 50.97 | 65.10 | a | 79.24 | a | 86.45 | 86.24 | b | 72.57 | 58.74 | 43.04 | b | 15.52 | 55.24 | |||||||
1984 | 24.52 | d | 37.55 | 36.93 | c | 58.37 | 67.16 | 80.53 | 82.39 | 83.68 | 70.93 | c | 61.93 | a | 44.10 | 30.41 | d | 56.54 | ||||||||
1985 | 23.14 | b | 24.70 | a | 44.41 | b | 63.10 | 75.47 | a | 76.19 | c | 83.55 | b | 77.21 | b | ----- | z | 59.00 | 36.03 | 18.90 | a | 52.88 | a | |||
1986 | 27.81 | 25.25 | 45.13 | 62.18 | b | 71.84 | 79.86 | a | 85.16 | 78.13 | 70.03 | 59.35 | 38.93 | a | 31.19 | 56.24 | ||||||||||
1987 | 30.69 | b | 40.29 | 47.77 | 66.57 | b | 74.45 | b | 83.00 | 84.23 | 78.19 | 72.63 | 54.55 | 46.93 | a | 33.45 | b | 59.40 | ||||||||
1988 | 20.90 | a | 24.83 | 44.37 | a | 61.07 | 77.23 | a | 85.10 | a | 87.57 | a | 85.39 | 74.30 | 54.74 | 43.63 | 30.55 | 57.47 | ||||||||
1989 | 33.13 | 23.39 | 37.13 | 56.28 | a | 69.19 | 76.87 | 85.30 | a | 80.10 | 71.27 | 61.93 | a | 37.50 | 20.26 | 54.36 | ||||||||||
1990 | 35.13 | 34.30 | a | 46.06 | 58.77 | 67.33 | a | 78.87 | 80.94 | 80.39 | 74.03 | 61.20 | a | 49.90 | 26.81 | 57.81 | ||||||||||
1991 | 22.74 | 35.50 | 44.61 | 60.57 | 70.45 | 80.58 | r | 81.52 | 80.84 | 69.23 | 57.94 | 33.80 | 31.23 | 53.49 | a | |||||||||||
1992 | 30.06 | 35.31 | 41.06 | 52.07 | 71.84 | 76.40 | 75.84 | 76.16 | 70.62 | a | 58.45 | 37.47 | 30.39 | 54.64 | ||||||||||||
1993 | 25.94 | 28.59 | a | 40.16 | 54.33 | 67.97 | 75.60 | 79.90 | 80.87 | a | 64.90 | 58.73 | a | 39.97 | 29.81 | 53.90 | ||||||||||
1994 | 14.87 | 22.30 | a | 42.94 | 58.00 | 71.40 | a | 80.31 | a | 78.58 | 76.23 | 73.17 | 61.61 | 46.14 | a | 33.77 | 54.94 | |||||||||
1995 | 25.81 | 29.86 | 44.13 | 51.97 | 67.61 | 80.70 | 83.00 | 84.32 | 70.38 | a | 57.40 | a | 34.60 | 26.16 | 54.66 | |||||||||||
1996 | 21.23 | 27.93 | a | 35.65 | 54.21 | a | 64.57 | a | 77.34 | a | 79.07 | b | 80.71 | 71.41 | a | 60.16 | 34.60 | 24.19 | 52.59 | |||||||
1997 | 22.30 | a | 30.21 | 39.42 | 54.97 | 65.17 | a | 80.97 | a | 80.23 | 76.80 | a | 72.10 | 61.39 | 36.40 | 33.52 | 54.46 | |||||||||
1998 | 28.10 | 39.00 | a | 39.80 | a | 62.40 | 76.40 | a | 74.67 | 82.39 | 80.53 | a | 78.45 | a | 61.06 | 46.10 | 36.39 | 58.77 | ||||||||
1999 | 20.90 | 37.04 | a | 45.03 | 59.80 | 70.21 | b | 76.90 | 84.39 | c | 77.06 | 70.86 | a | 59.97 | 49.52 | a | 34.17 | a | 57.15 | |||||||
2000 | 25.60 | a | 37.82 | a | 50.93 | a | 58.87 | 68.55 | 76.17 | a | 79.32 | 78.70 | a | 70.50 | 63.77 | a | 39.17 | a | 16.77 | a | 55.51 | |||||
2001 | 30.20 | a | 24.39 | 37.29 | 58.59 | a | 69.23 | a | 77.48 | a | 84.71 | 83.16 | 69.13 | 57.23 | a | 56.86 | a | 36.37 | a | 57.05 | ||||||
2002 | 34.32 | 37.64 | 35.52 | 57.00 | 65.20 | a | 79.43 | 83.58 | 79.67 | a | 74.37 | 52.68 | 42.45 | a | 36.23 | 56.51 | ||||||||||
2003 | 24.71 | 28.14 | 42.27 | a | 58.07 | a | 68.10 | 77.52 | a | 81.71 | 84.23 | a | 73.17 | a | 60.23 | 42.38 | a | 35.23 | 56.31 | |||||||
2004 | 22.03 | 31.38 | 44.48 | 61.86 | a | 67.27 | a | 75.10 | 79.55 | 74.68 | 76.57 | 59.53 | a | 46.47 | 31.38 | b | 55.86 | |||||||||
2005 | 24.87 | 35.15 | a | 41.90 | 62.17 | 65.23 | 82.63 | 85.10 | a | 80.84 | 77.43 | 62.90 | 46.37 | 26.06 | 57.55 | |||||||||||
2006 | 36.03 | 31.29 | 41.87 | a | 64.38 | a | 69.59 | b | 79.70 | 87.00 | 80.42 | 68.52 | a | 55.93 | a | 46.33 | 36.87 | a | 58.16 | |||||||
2007 | 28.65 | 20.56 | a | 47.74 | 57.14 | a | 76.10 | 82.00 | 83.81 | 80.58 | 75.30 | 64.06 | 42.67 | 25.61 | 57.02 | |||||||||||
2008 | 22.94 | 25.00 | 38.35 | 54.93 | 66.87 | 77.23 | 83.23 | 80.39 | 73.20 | 60.61 | c | 43.21 | a | 24.65 | 54.22 | |||||||||||
2009 | 18.97 | 33.11 | a | 44.16 | 58.67 | 69.77 | 76.47 | 77.10 | 77.97 | 75.43 | 51.17 | a | 51.47 | 27.26 | 55.13 | |||||||||||
2010 | 21.97 | 29.71 | 50.90 | 66.73 | 72.39 | 77.90 | 84.65 | 84.87 | a | 70.13 | 64.37 | a | 45.30 | 24.35 | 57.77 | |||||||||||
2011 | 20.58 | 29.43 | 40.39 | 54.14 | a | 69.42 | 79.17 | 86.65 | 81.84 | 70.87 | 64.13 | a | 47.93 | 34.81 | 56.61 | |||||||||||
2012 | 33.16 | 34.93 | 58.87 | a | 59.93 | 75.03 | a | 82.47 | 89.73 | a | 81.94 | 74.60 | 57.77 | 47.21 | a | 35.28 | b | 60.91 | ||||||||
2013 | 28.48 | 29.25 | 35.58 | 48.76 | a | 68.61 | 76.45 | a | 82.61 | 82.26 | 77.23 | 58.48 | b | 42.31 | a | 23.60 | a | 54.47 | ||||||||
2014 | 19.10 | 19.64 | 37.00 | a | 54.76 | a | 69.93 | b | 79.60 | 78.84 | 81.65 | 73.63 | c | 58.16 | 35.96 | b | 31.61 | 53.32 | ||||||||
2015 | 27.13 | 22.12 | b | 45.16 | 60.90 | 70.87 | 78.93 | 82.61 | 79.29 | 77.34 | a | 62.81 | 50.80 | 38.23 | 58.02 | |||||||||||
2016 | 25.94 | 32.93 | 49.43 | a | 58.83 | 71.87 | 81.24 | a | 83.10 | 81.29 | 74.73 | 63.45 | 53.50 | 28.16 | 58.71 | |||||||||||
2017 | 27.13 | 40.29 | 42.87 | 59.93 | 67.94 | 80.37 | 83.65 | 77.20 | a | 77.47 | 60.10 | a | 42.73 | 27.10 | 57.23 | |||||||||||
2018 | 26.13 | 28.18 | 42.47 | a | 47.60 | 76.68 | 81.55 | a | 82.58 | 81.10 | a | 73.77 | 55.00 | 35.60 | 33.27 | a | 55.33 | |||||||||
2019 | 24.42 | 22.19 | a | 36.23 | 54.23 | 62.61 | 76.23 | 82.19 | 77.97 | 73.87 | 53.94 | 35.90 | 31.60 | a | 52.61 | |||||||||||
2020 | 28.16 | 29.50 | a | 43.27 | a | 52.83 | 65.97 | 80.37 | 84.03 | 81.06 | 68.67 | 51.16 | 48.67 | 33.90 | 55.63 | |||||||||||
2021 | 28.97 | a | 18.69 | b | 49.26 | 55.10 | 66.70 | a | 83.33 | 81.77 | 80.00 | 74.40 | 64.16 | 44.73 | 33.97 | a | 56.76 | |||||||||
2022 | 21.16 | 26.68 | 40.71 | 49.23 | 70.68 | c | 78.70 | 81.97 | a | 79.16 | 73.70 | 61.36 | c | 45.43 | 26.30 | a | 54.59 | |||||||||
2023 | 29.68 | 31.78 | a | 39.39 | 57.38 | d | 71.11 | c | 81.96 | d | 82.10 | 82.42 | 76.97 | 61.42 | 46.77 | 40.26 | 58.44 | |||||||||
2024 | 26.39 | 43.97 | 47.84 | 55.78 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.40 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.76 | 29.55 | 41.08 | 57.06 | 69.78 | 78.94 | 82.89 | 80.65 | 72.34 | 60.07 | 43.14 | 29.79 | 55.91 | |||||||||||||
S.D. | 5.40 | 5.34 | 5.40 | 4.61 | 3.67 | 2.75 | 2.75 | 2.63 | 3.00 | 3.96 | 4.83 | 5.16 | 1.76 | |||||||||||||
SKEW | -0.34 | 0.37 | 0.44 | -0.24 | 0.26 | -0.01 | 0.02 | -0.07 | -0.37 | 0.20 | 0.03 | -0.48 | -0.05 | |||||||||||||
MAX | 36.03 | 43.97 | 58.87 | 66.73 | 79.11 | 85.33 | 89.73 | 86.74 | 78.45 | 70.48 | 56.86 | 40.26 | 60.91 | |||||||||||||
MIN | 11.19 | 18.69 | 30.84 | 46.43 | 62.61 | 71.57 | 75.84 | 73.90 | 64.57 | 51.16 | 33.80 | 15.52 | 51.29 | |||||||||||||
YRS | 79 | 79 | 80 | 78 | 77 | 77 | 76 | 78 | 78 | 79 | 77 | 78 | 69 |