YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.27 | 58.77 | 47.90 | 37.52 | 55.11 | h | ||||
1940 | 17.23 | a | 29.64 | a | 33.27 | a | 54.20 | 67.23 | 77.37 | 84.68 | 76.55 | 74.53 | 62.97 | 37.87 | 31.20 | a | 53.89 | |||||||||
1941 | 27.63 | a | 26.75 | 37.00 | a | 62.73 | 75.52 | 77.66 | a | 84.61 | 83.81 | 73.07 | a | 59.87 | 46.17 | 35.65 | 57.54 | |||||||||
1942 | 27.94 | 27.68 | 43.16 | 65.50 | 66.16 | 76.63 | 81.48 | 80.03 | 67.13 | 60.55 | 42.75 | b | 23.43 | a | 55.20 | |||||||||||
1943 | 20.74 | 31.32 | 36.00 | 55.87 | 65.71 | 80.13 | 84.10 | a | 83.03 | a | 68.53 | 59.53 | a | 36.76 | a | 34.27 | a | 54.67 | ||||||||
1944 | 35.03 | b | 33.29 | a | 35.33 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.55 | 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 | 86.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.55 | k | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.87 | p | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 67.93 | a | 79.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.78 | j | |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.13 | ----- | z | 44.83 | 31.37 | a | 50.11 | i | ||
1970 | ----- | z | ----- | z | 40.48 | ----- | z | 72.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.07 | ----- | z | 52.31 | i | |||
1971 | ----- | z | ----- | z | 39.71 | ----- | z | ----- | z | 84.77 | 81.61 | 83.00 | 75.70 | 66.32 | 44.97 | 32.23 | 63.54 | d | ||||||||
1972 | ----- | z | 27.72 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.72 | k | |
1973 | ----- | z | 34.71 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.13 | 31.42 | j | ||
1974 | 26.97 | a | ----- | z | ----- | z | ----- | z | ----- | z | 77.34 | a | ----- | z | ----- | z | 69.23 | 62.17 | b | ----- | z | 34.06 | 53.96 | g | ||
1975 | 27.74 | ----- | z | 35.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.82 | j | ||
1976 | ----- | z | ----- | z | ----- | z | 63.72 | a | ----- | z | 84.07 | a | 88.14 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.64 | i |
1977 | ----- | z | 32.71 | 49.03 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.80 | ----- | z | ----- | z | ----- | z | 51.18 | i | ||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | 61.83 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.83 | k |
1981 | ----- | z | ----- | z | 49.23 | a | 62.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.10 | j | |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.03 | 83.45 | 83.48 | 70.10 | 59.81 | 34.57 | 32.41 | b | 63.98 | e | ||||||
1992 | 30.97 | 36.83 | 42.19 | 53.30 | 72.48 | 77.90 | 77.45 | 79.74 | 71.23 | 60.68 | 39.20 | 31.21 | b | 56.10 | ||||||||||||
1993 | 23.58 | 28.39 | 40.29 | 53.23 | 67.61 | 74.70 | 79.71 | 80.52 | 65.93 | 59.35 | 40.93 | 31.31 | b | 53.80 | ||||||||||||
1994 | 17.16 | 26.18 | 44.68 | 58.50 | 72.26 | 82.03 | 80.23 | 78.50 | a | 75.50 | 63.81 | 47.90 | 35.13 | 56.82 | ||||||||||||
1995 | 26.39 | 30.93 | 44.70 | a | 50.87 | 67.97 | 82.77 | 84.90 | 85.52 | 71.60 | 58.93 | a | 35.07 | 27.23 | 55.57 | |||||||||||
1996 | 22.10 | 27.69 | 35.40 | a | 53.90 | 64.55 | 76.70 | 80.71 | 82.13 | 72.90 | 61.47 | a | 35.67 | 25.00 | 53.18 | |||||||||||
1997 | 21.00 | a | 32.86 | 39.94 | 56.20 | 63.42 | 82.03 | 81.10 | a | 78.52 | 73.43 | 61.71 | 36.59 | a | 34.74 | 55.13 | ||||||||||
1998 | 28.47 | a | 40.18 | 40.58 | 61.33 | 77.32 | 77.17 | 85.45 | 83.06 | 81.67 | 62.00 | b | 47.52 | a | 38.43 | a | 60.27 | |||||||||
1999 | 21.68 | 38.75 | 45.65 | 59.67 | 72.13 | 79.90 | 87.65 | 80.55 | 74.17 | 61.90 | 53.67 | 33.60 | a | 59.11 | ||||||||||||
2000 | 27.21 | b | 39.96 | e | 51.55 | 58.27 | 73.39 | 76.70 | 82.87 | 84.45 | 76.39 | l | 62.61 | 39.30 | 16.35 | 55.70 | a | |||||||||
2001 | 29.26 | 25.86 | 37.42 | 58.63 | 69.00 | 76.93 | 84.71 | 83.39 | 69.50 | 58.48 | 56.73 | 37.42 | 57.28 | |||||||||||||
2002 | 35.19 | 38.57 | 36.06 | 55.07 | 65.71 | 79.67 | 86.19 | 81.97 | a | 76.17 | 54.70 | a | 42.90 | 34.23 | 57.20 | |||||||||||
2003 | 23.81 | 27.04 | 41.42 | 58.33 | 67.68 | 76.80 | 82.29 | 84.74 | 73.93 | 60.97 | 41.73 | 34.26 | 56.08 | |||||||||||||
2004 | 21.68 | 31.59 | 44.68 | 61.53 | 68.03 | 76.20 | 80.55 | 75.48 | 76.63 | 60.39 | 47.53 | 32.73 | a | 56.42 | ||||||||||||
2005 | 25.16 | 35.82 | 41.42 | 63.37 | 65.81 | 82.33 | l | 85.81 | 81.35 | 77.50 | 63.84 | 46.30 | 25.94 | 55.66 | a | |||||||||||
2006 | 37.45 | 30.89 | 43.19 | 63.27 | 68.26 | 79.80 | 87.00 | 80.84 | 68.83 | 56.42 | 46.40 | 37.23 | 58.30 | |||||||||||||
2007 | 29.55 | 20.86 | 46.94 | 55.07 | 72.94 | 79.30 | 82.29 | 78.19 | 74.60 | 62.90 | 42.50 | 26.42 | 55.96 | |||||||||||||
2008 | 22.45 | 22.07 | 36.40 | a | 52.83 | 66.65 | 76.03 | 81.42 | 78.61 | 72.76 | a | 58.65 | 42.03 | 24.42 | 52.86 | |||||||||||
2009 | 17.79 | b | 33.46 | 45.46 | c | 57.52 | a | 68.37 | a | 75.87 | 76.00 | 77.45 | 74.83 | 50.40 | a | 50.86 | a | 26.90 | 54.58 | |||||||
2010 | 21.29 | 28.36 | 49.16 | 65.07 | 68.16 | 76.67 | 82.10 | 84.19 | 68.63 | 65.06 | 43.97 | 23.52 | 56.35 | |||||||||||||
2011 | 20.10 | 28.54 | 38.97 | 52.87 | 66.45 | 77.33 | 85.63 | a | 82.13 | 70.03 | 63.81 | 47.93 | 34.87 | 55.72 | ||||||||||||
2012 | 31.32 | 35.66 | 59.00 | 58.67 | 73.52 | 80.72 | a | 89.48 | 81.19 | 73.67 | 57.39 | 46.90 | a | 33.06 | 60.05 | |||||||||||
2013 | 27.55 | 26.93 | 34.42 | 47.20 | 66.13 | 75.37 | 81.90 | 82.00 | a | 75.79 | a | 58.13 | 40.77 | 22.77 | 53.25 | |||||||||||
2014 | 18.23 | 17.86 | 33.52 | 52.27 | 66.39 | 79.47 | 78.71 | 80.74 | 71.53 | 57.58 | 35.00 | 30.61 | 51.82 | |||||||||||||
2015 | 25.93 | b | 17.93 | 42.97 | 60.43 | 69.35 | 78.23 | 81.71 | 78.35 | 78.67 | 61.97 | 51.37 | 38.84 | 57.15 | ||||||||||||
2016 | 23.61 | 32.07 | 48.94 | 57.63 | 70.52 | 80.27 | 82.61 | 82.87 | 74.43 | 63.35 | 54.60 | 28.00 | 58.24 | |||||||||||||
2017 | 26.10 | 39.25 | 40.94 | 59.37 | 66.45 | 79.63 | 82.42 | 77.39 | 76.97 | 61.87 | 43.07 | 28.23 | 56.81 | |||||||||||||
2018 | 25.52 | 27.86 | 43.06 | 46.43 | 75.10 | a | 79.47 | 82.81 | 80.84 | 73.67 | 54.65 | 35.93 | 32.71 | 54.84 | ||||||||||||
2019 | 23.94 | 23.18 | 37.52 | 54.24 | a | 64.03 | a | 76.37 | 83.45 | 78.63 | a | 74.70 | 54.65 | 36.00 | 32.97 | 53.31 | ||||||||||
2020 | 29.68 | 31.00 | 44.48 | 54.27 | 67.17 | a | 80.67 | c | 83.48 | 81.17 | b | 69.60 | 52.75 | c | 49.80 | 35.03 | b | 56.59 | ||||||||
2021 | 29.70 | a | 21.64 | 50.61 | 57.97 | a | 68.58 | 84.90 | 82.79 | b | 81.20 | a | 75.79 | a | 65.27 | a | 44.61 | b | 34.86 | b | 58.16 | |||||
2022 | 21.19 | 27.37 | a | 41.23 | 49.10 | 69.53 | a | 79.44 | c | 82.52 | b | 79.83 | a | 74.40 | 61.23 | 45.24 | a | 26.19 | 54.77 | |||||||
2023 | 29.94 | 32.19 | a | 40.77 | 56.39 | b | 72.48 | b | 82.43 | 83.23 | a | 82.87 | 75.76 | a | 61.31 | b | 47.07 | 40.16 | 58.72 | |||||||
2024 | 27.10 | a | 47.12 | c | 49.16 | 56.39 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.13 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.63 | 30.46 | 42.14 | 57.17 | 69.01 | 79.08 | 83.10 | 81.01 | 73.30 | 60.21 | 43.78 | 31.30 | 56.05 | |||||||||||||
S.D. | 4.90 | 6.25 | 5.60 | 4.77 | 3.40 | 2.71 | 2.81 | 2.43 | 3.30 | 3.46 | 5.66 | 5.14 | 2.08 | |||||||||||||
SKEW | 0.27 | 0.20 | 0.61 | -0.25 | 0.61 | 0.57 | -0.07 | -0.27 | -0.11 | -0.78 | 0.15 | -0.64 | 0.07 | |||||||||||||
MAX | 37.45 | 47.12 | 59.00 | 65.50 | 77.32 | 84.90 | 89.48 | 85.52 | 81.67 | 66.32 | 56.73 | 40.16 | 60.27 | |||||||||||||
MIN | 17.16 | 17.86 | 33.27 | 46.43 | 63.42 | 74.70 | 76.00 | 75.48 | 65.93 | 50.40 | 34.57 | 16.35 | 51.82 | |||||||||||||
YRS | 40 | 41 | 43 | 39 | 38 | 40 | 40 | 38 | 41 | 40 | 41 | 42 | 34 |