YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | 77.56 | c | 79.58 | 82.55 | 69.00 | 62.32 | 44.60 | 29.32 | 63.56 | e | ||||||
1963 | 13.23 | 24.86 | 44.97 | 61.48 | e | 69.03 | 83.79 | b | 85.52 | 80.74 | 74.27 | 71.55 | 49.23 | 19.84 | 56.54 | |||||||||||
1964 | 32.65 | 37.90 | 39.29 | 59.83 | 75.87 | 82.60 | ----- | z | 79.52 | f | 72.17 | 61.32 | 47.47 | 23.07 | p | 56.57 | c | |||||||||
1965 | 21.43 | a | 23.43 | 29.17 | b | 51.21 | b | 72.73 | a | 77.87 | 79.97 | ----- | z | 63.93 | 63.32 | 44.57 | 36.42 | 51.28 | a | |||||||
1966 | 17.29 | 29.68 | 47.32 | 54.13 | 69.26 | 81.33 | 87.90 | 82.32 | 74.40 | 63.90 | 43.07 | b | 30.13 | a | 56.73 | |||||||||||
1967 | 29.06 | 25.54 | 43.06 | 58.03 | a | 66.87 | 80.10 | a | 82.39 | 79.97 | b | 74.87 | 60.60 | a | 39.93 | 37.11 | c | 56.46 | ||||||||
1968 | 27.16 | 28.36 | a | 54.47 | a | 62.38 | a | 67.13 | a | 79.00 | 81.74 | 82.03 | 74.73 | 63.06 | 42.70 | 29.13 | 57.66 | |||||||||
1969 | 21.58 | 31.75 | 36.77 | 62.33 | 73.68 | 74.80 | 83.77 | 86.38 | b | 77.13 | 57.74 | 44.33 | 30.42 | 56.72 | ||||||||||||
1970 | 18.17 | a | 30.96 | 38.16 | 59.27 | 73.03 | 83.77 | 84.87 | 82.00 | 72.13 | 61.45 | 41.43 | 29.19 | 56.20 | ||||||||||||
1971 | 19.03 | 28.50 | 37.77 | 61.93 | 69.58 | 84.63 | 80.17 | a | 82.03 | 74.57 | 66.43 | a | 42.43 | 28.45 | 56.29 | |||||||||||
1972 | 20.23 | 24.45 | 37.32 | 53.03 | 73.03 | 77.43 | 76.58 | 76.90 | 67.77 | 55.32 | 38.43 | 22.61 | 51.93 | |||||||||||||
1973 | 26.74 | 29.64 | 47.03 | 53.40 | 64.90 | 76.10 | 81.63 | a | 79.10 | a | 67.47 | 67.10 | ----- | z | 26.26 | 56.31 | a | |||||||||
1974 | 24.13 | 27.61 | 39.97 | 58.73 | 65.71 | 76.23 | 87.61 | 80.32 | 70.10 | 62.97 | 43.77 | 32.84 | 55.83 | |||||||||||||
1975 | 26.06 | 26.93 | a | 32.97 | 48.60 | 71.10 | 77.10 | 85.90 | 84.33 | a | 68.30 | 67.43 | a | 49.87 | 30.71 | 55.78 | ||||||||||
1976 | 25.90 | 39.38 | 43.45 | 64.93 | 69.16 | 84.17 | 87.97 | b | 84.80 | a | 75.90 | 57.81 | 38.80 | 25.00 | a | 58.11 | ||||||||||
1977 | 19.25 | s | 33.76 | c | 48.42 | 67.30 | 81.39 | 80.83 | 87.74 | 81.10 | a | 75.63 | 61.40 | a | 45.69 | a | 27.38 | b | 62.79 | a | ||||||
1978 | ----- | z | 23.50 | 41.35 | 58.50 | 74.74 | 81.57 | 82.55 | 84.45 | 79.17 | 60.52 | 44.27 | 26.77 | a | 59.76 | a | ||||||||||
1979 | 12.23 | 23.46 | 38.77 | 54.87 | 70.73 | a | 80.83 | 85.71 | 80.16 | ----- | z | 61.74 | 42.63 | 37.77 | 53.54 | a | ||||||||||
1980 | 28.56 | d | 29.00 | 40.52 | 63.31 | a | 78.06 | 82.73 | 90.03 | a | 84.27 | a | 74.79 | a | 59.17 | a | 49.27 | 32.03 | 59.31 | |||||||
1981 | 32.58 | 37.71 | 49.93 | a | 64.00 | 71.94 | 79.87 | 86.15 | d | 83.20 | a | 74.45 | a | 58.52 | 46.83 | a | 27.70 | a | 59.41 | |||||||
1982 | 17.19 | j | 30.60 | c | 38.90 | a | 54.44 | c | 74.13 | h | 75.71 | b | 85.66 | b | 82.13 | a | 71.17 | a | ----- | z | ----- | z | 34.08 | f | 62.66 | e |
1983 | 29.32 | 34.79 | 42.26 | 53.15 | d | 66.24 | f | 80.32 | e | 88.27 | a | 88.27 | e | 72.64 | b | 58.37 | d | 41.17 | f | 14.88 | e | 56.23 | b | |||
1984 | 26.48 | h | 38.33 | e | 36.68 | f | 56.46 | f | 68.07 | b | 80.33 | c | 82.90 | b | 84.75 | c | 71.41 | h | 64.14 | i | 45.12 | e | 31.19 | j | 66.58 | f |
1985 | 24.29 | j | 26.85 | h | 47.75 | g | 65.42 | f | 76.80 | f | 77.92 | f | 85.70 | d | 80.08 | e | 70.48 | e | 60.92 | e | 36.04 | g | 18.09 | h | 74.30 | h |
1986 | 29.76 | j | 25.74 | i | 45.27 | i | 65.12 | f | 72.44 | d | 81.62 | d | 83.70 | d | 78.35 | e | 71.17 | f | 60.84 | f | 38.32 | h | 31.96 | f | 79.03 | h |
1987 | 30.50 | g | 41.57 | e | 49.57 | h | 70.39 | g | 76.96 | d | 84.52 | g | 85.87 | 79.04 | h | 74.92 | e | 55.00 | g | 46.80 | j | 32.28 | f | 69.83 | h | |
1988 | 22.85 | k | 25.90 | h | 44.48 | f | 59.24 | i | 79.31 | e | 86.84 | e | 89.70 | a | 87.36 | c | 75.96 | f | 56.08 | e | 44.76 | m | 32.45 | i | 79.86 | g |
1989 | 36.41 | i | 24.00 | j | 36.00 | h | 55.96 | g | 70.92 | e | 80.38 | d | 86.62 | b | 82.10 | 73.45 | a | 64.23 | a | 39.14 | a | 20.29 | 64.64 | d | ||
1990 | 35.52 | 35.11 | a | 46.87 | 59.83 | a | 68.13 | a | 79.73 | 81.50 | a | 82.34 | b | 76.36 | b | 61.26 | 48.77 | 28.32 | c | 58.65 | ||||||
1991 | 24.84 | 36.89 | a | 44.65 | 62.43 | 73.06 | 86.66 | a | 82.45 | 83.36 | c | 70.27 | 59.57 | a | 34.76 | a | 33.06 | 57.67 | ||||||||
1992 | 32.20 | a | 38.10 | 43.07 | a | 53.00 | 73.94 | 79.36 | b | 76.29 | 78.77 | 72.19 | i | 58.93 | a | 37.76 | i | 30.05 | j | 59.30 | c | |||||
1993 | 27.95 | i | 31.33 | j | 41.74 | d | 55.20 | j | 70.23 | i | 76.48 | i | 81.39 | h | 82.64 | f | 66.11 | l | 60.90 | k | 41.60 | j | 28.48 | j | 41.74 | k |
1994 | 20.06 | n | 28.87 | e | 46.15 | d | 59.68 | h | 75.00 | f | 83.35 | g | 81.05 | i | 79.30 | h | 77.25 | j | 61.76 | j | 46.10 | j | 36.35 | h | 37.51 | j |
1995 | 27.35 | e | 33.58 | i | 46.57 | j | 53.15 | j | 67.81 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.58 | j |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.03 | 81.74 | 82.65 | 74.10 | 63.06 | 34.97 | a | 26.97 | a | 63.07 | e | |||||
1997 | 22.03 | a | 32.15 | a | 40.52 | 59.07 | 66.23 | 81.80 | 80.65 | 78.57 | a | 74.17 | a | 62.60 | a | 38.14 | a | 35.84 | 55.98 | |||||||
1998 | 29.66 | b | 40.78 | a | 40.71 | 63.14 | b | 78.10 | 75.87 | 84.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.92 | e | ||||
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.23 | 33.48 | 43.36 | j | ||
2000 | 25.06 | 36.10 | 50.97 | 58.20 | 70.39 | 75.83 | 80.52 | 80.77 | 72.13 | 64.03 | 38.80 | 14.90 | 55.64 | |||||||||||||
2001 | 27.94 | 24.00 | 36.10 | 51.78 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.34 | i | |||
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.71 | x | 80.44 | d | 75.80 | 53.81 | 42.46 | b | 34.39 | 57.38 | g | |||
2003 | 23.74 | 26.85 | a | 41.76 | b | 57.62 | a | 68.47 | a | 77.60 | 83.06 | 85.58 | 75.03 | a | 62.60 | a | 41.78 | c | 32.74 | 56.40 | ||||||
2004 | 20.59 | b | 29.25 | a | 42.97 | 60.90 | 66.81 | 76.60 | 80.50 | a | 75.81 | 77.46 | b | 59.97 | 46.53 | 30.74 | 55.68 | |||||||||
2005 | 23.50 | a | 34.04 | 40.13 | 62.10 | 64.17 | a | 83.28 | a | 85.23 | a | 81.55 | 77.56 | c | 63.03 | 45.62 | a | 24.55 | 57.06 | |||||||
2006 | 35.83 | a | 29.19 | a | 41.00 | 63.70 | 69.38 | b | 80.13 | 88.61 | 80.83 | b | 68.37 | 54.65 | 44.93 | 35.58 | 57.68 | |||||||||
2007 | 27.84 | 19.93 | 45.35 | 56.47 | 74.87 | 81.37 | 84.84 | 80.32 | 75.80 | 63.52 | 42.43 | 24.40 | a | 56.43 | ||||||||||||
2008 | 21.45 | 21.86 | 34.68 | 50.80 | 62.32 | 75.53 | 82.58 | 80.19 | 74.07 | 59.19 | 42.03 | 23.63 | a | 52.36 | ||||||||||||
2009 | 16.03 | a | 30.04 | 41.47 | a | 57.03 | a | 69.13 | a | 76.23 | 76.58 | 77.39 | 75.93 | a | 50.13 | 50.93 | 24.90 | 53.82 | ||||||||
2010 | 19.26 | 27.54 | 47.25 | c | 65.77 | 71.10 | 77.43 | 84.83 | a | 85.16 | 70.86 | a | 65.58 | 43.97 | 23.00 | 56.81 | ||||||||||
2011 | 19.55 | 27.50 | 37.77 | 53.73 | 67.29 | 77.86 | a | 86.40 | a | 82.20 | a | 71.03 | 64.84 | 47.66 | a | 33.77 | 55.80 | |||||||||
2012 | 30.43 | a | 35.41 | 59.00 | a | 58.69 | a | 74.47 | a | 81.97 | 89.81 | 81.71 | 74.50 | b | 57.26 | 46.79 | b | 32.10 | a | 60.18 | ||||||
2013 | 26.58 | 26.19 | a | 33.87 | 47.17 | 66.29 | 76.47 | 83.06 | 82.32 | 76.73 | 57.97 | 39.83 | a | 21.84 | 53.19 | |||||||||||
2014 | 18.45 | 18.46 | 33.23 | 51.66 | a | 68.32 | 79.53 | 79.81 | 81.77 | 72.73 | 58.40 | a | 33.97 | 30.39 | 52.23 | |||||||||||
2015 | 24.94 | 18.96 | 43.45 | 59.70 | 68.42 | 77.87 | 81.06 | 77.87 | 77.93 | b | 61.55 | 50.68 | b | 37.13 | 56.63 | |||||||||||
2016 | 22.45 | 31.04 | a | 47.37 | a | 56.37 | 69.84 | 79.67 | 82.48 | 82.03 | 74.23 | 62.87 | 53.97 | 26.42 | 57.39 | |||||||||||
2017 | 26.23 | 38.33 | a | 40.55 | 60.00 | 67.48 | 81.03 | a | 83.97 | a | 77.33 | a | 77.83 | 61.03 | 41.47 | 26.58 | 56.82 | |||||||||
2018 | 22.71 | 25.29 | 40.90 | 45.27 | 77.32 | 81.23 | 84.68 | 82.84 | 75.70 | 54.29 | 34.50 | 31.48 | 54.68 | |||||||||||||
2019 | 22.55 | 21.43 | 36.97 | 55.83 | 65.50 | a | 79.80 | 85.84 | 81.42 | 77.20 | 55.77 | 36.23 | 31.65 | 54.18 | ||||||||||||
2020 | 28.39 | 30.21 | 43.97 | 55.27 | 69.52 | 84.27 | 87.81 | 84.71 | 71.37 | 53.00 | 49.87 | 34.19 | 57.71 | |||||||||||||
2021 | 28.61 | 19.14 | 50.03 | 56.83 | a | 70.35 | 87.83 | 84.65 | 83.42 | 77.80 | 66.68 | 45.07 | 33.39 | 58.65 | ||||||||||||
2022 | 20.03 | 24.89 | 40.39 | 49.13 | 70.84 | 81.20 | 85.55 | 84.35 | 79.13 | 64.74 | 46.03 | 25.00 | 55.94 | |||||||||||||
2023 | 28.94 | 31.11 | 39.74 | 57.60 | 72.84 | f | 84.44 | n | 83.46 | r | 85.00 | l | 75.15 | j | 57.52 | d | 46.30 | 39.90 | 43.02 | e | ||||||
2024 | 25.81 | 44.41 | 50.93 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.38 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.66 | 29.90 | 42.22 | 57.55 | 70.69 | 80.03 | 83.98 | 81.83 | 73.75 | 60.79 | 43.78 | 29.07 | 56.34 | |||||||||||||
S.D. | 5.32 | 6.26 | 5.63 | 5.03 | 4.14 | 3.12 | 3.30 | 2.65 | 3.31 | 4.11 | 4.82 | 5.62 | 1.93 | |||||||||||||
SKEW | -0.12 | 0.22 | 0.44 | -0.36 | 0.52 | 0.44 | -0.32 | 0.03 | -0.70 | -0.15 | -0.13 | -0.46 | -0.50 | |||||||||||||
MAX | 35.83 | 44.41 | 59.00 | 67.30 | 81.39 | 87.83 | 90.03 | 88.27 | 79.17 | 71.55 | 53.97 | 39.90 | 60.18 | |||||||||||||
MIN | 12.23 | 18.46 | 29.17 | 45.27 | 62.32 | 74.80 | 76.29 | 75.81 | 63.93 | 50.13 | 33.97 | 14.88 | 51.93 | |||||||||||||
YRS | 48 | 53 | 52 | 48 | 51 | 53 | 54 | 52 | 50 | 52 | 49 | 49 | 37 |