YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | 65.93 | 58.48 | a | 42.24 | a | 31.42 | 49.52 | h | ||
1968 | 33.71 | 36.50 | 46.44 | 52.77 | 60.27 | a | 75.10 | 75.82 | 73.76 | 67.42 | 58.26 | 41.02 | 30.11 | 54.26 | ||||||||||||
1969 | 37.42 | 37.71 | 32.57 | a | 56.07 | 63.31 | 68.88 | 78.69 | 76.86 | b | 69.00 | 49.81 | 43.90 | 36.27 | 54.21 | |||||||||||
1970 | 32.02 | 40.32 | 37.81 | 50.43 | 66.56 | 71.38 | 78.61 | 79.39 | 66.71 | a | 49.52 | 43.74 | a | 37.29 | 54.48 | |||||||||||
1971 | 33.95 | 35.77 | 44.35 | 51.07 | 59.97 | 75.95 | 75.77 | 72.47 | 64.67 | 54.27 | 41.13 | 33.94 | 53.61 | |||||||||||||
1972 | 33.13 | a | 40.26 | 50.97 | 56.93 | 62.05 | 72.38 | a | 74.85 | 73.40 | 67.38 | 55.10 | 33.88 | 27.47 | a | 53.98 | ||||||||||
1973 | 30.23 | 37.14 | 42.79 | 46.55 | a | 60.47 | 72.92 | 75.08 | 76.32 | a | 61.80 | ----- | z | 44.28 | ----- | z | 54.76 | b | ||||||||
1974 | ----- | z | 39.12 | 48.02 | 55.70 | 67.37 | a | 72.53 | 79.47 | a | 71.62 | a | 61.37 | c | 58.19 | 41.80 | 32.05 | a | 57.02 | a | ||||||
1975 | 32.47 | a | 31.85 | a | 40.65 | 49.35 | 59.08 | a | 68.02 | 73.16 | c | 74.77 | a | 65.04 | b | 58.26 | 41.42 | 39.40 | 52.79 | |||||||
1976 | 33.85 | 41.84 | ----- | z | ----- | z | ----- | z | 73.26 | a | 75.89 | 72.92 | 65.58 | 47.53 | 37.36 | a | 36.03 | 53.81 | c | |||||||
1977 | 26.85 | a | 36.13 | a | 42.33 | a | 52.72 | a | 62.52 | a | 73.28 | a | 77.65 | 73.03 | 67.71 | a | 52.95 | b | 39.13 | 32.79 | 53.09 | |||||
1978 | 20.33 | a | 20.93 | a | 41.20 | a | ----- | z | 58.98 | a | 71.91 | a | 79.21 | 72.73 | 67.25 | 55.98 | 41.50 | 28.53 | a | 50.78 | a | |||||
1979 | 19.73 | a | 34.45 | 44.07 | a | 52.05 | a | ----- | z | ----- | z | ----- | z | 72.39 | 67.87 | 56.53 | a | 37.26 | a | 35.87 | 46.69 | c | ||||
1980 | 27.29 | 36.18 | a | 40.50 | a | 48.97 | a | 57.84 | 75.70 | 80.16 | 75.66 | 67.18 | 52.06 | 39.57 | a | 35.65 | n | 54.65 | a | |||||||
1981 | 34.77 | a | 36.89 | 43.65 | a | 60.67 | a | ----- | z | 76.98 | 77.17 | b | 74.05 | 68.62 | 55.65 | a | 47.09 | a | 35.50 | b | 55.55 | a | ||||
1982 | 33.96 | e | 30.44 | a | 44.11 | 51.83 | 62.23 | a | 67.35 | 77.23 | 76.63 | 69.39 | b | 54.22 | d | 41.29 | a | 34.16 | c | 53.57 | ||||||
1983 | 33.14 | b | 35.70 | a | 41.21 | 46.22 | 57.69 | 69.17 | 79.52 | 80.06 | 69.87 | 55.31 | 43.89 | b | 19.53 | a | 52.61 | |||||||||
1984 | 26.33 | a | 36.04 | a | 39.17 | a | 45.88 | a | 61.48 | 72.48 | a | 77.00 | 77.43 | a | 65.62 | e | 50.81 | 44.28 | 36.65 | a | 52.76 | |||||
1985 | 28.05 | b | 30.81 | b | 45.62 | c | 56.00 | 63.87 | 71.72 | a | 76.58 | 73.94 | 64.80 | 51.85 | a | 36.84 | a | 28.78 | a | 52.41 | ||||||
1986 | 39.61 | 36.26 | a | 47.58 | 54.75 | 61.29 | 71.38 | 77.06 | 73.62 | b | 66.15 | c | 52.28 | a | 40.18 | 32.68 | a | 54.40 | ||||||||
1987 | 31.18 | 39.23 | 40.39 | 52.42 | 62.68 | 71.47 | 76.90 | 74.59 | b | 65.40 | 53.79 | 41.85 | 31.81 | 53.47 | ||||||||||||
1988 | 26.84 | 34.80 | a | 41.74 | 49.93 | 61.47 | 73.55 | 76.23 | 76.52 | 64.78 | 54.37 | 43.87 | 34.60 | a | 53.22 | |||||||||||
1989 | 35.31 | 25.79 | 46.75 | a | 55.13 | 63.18 | 66.62 | 75.13 | 73.45 | 63.83 | 55.56 | 44.12 | 27.55 | 52.70 | ||||||||||||
1990 | 32.85 | 32.77 | 42.05 | 52.67 | 59.26 | 75.92 | 75.31 | 74.60 | 70.55 | 54.44 | 46.40 | 27.13 | 53.66 | |||||||||||||
1991 | 27.61 | 41.52 | 44.37 | 52.20 | 65.10 | 73.05 | 75.89 | 74.39 | 65.17 | 55.21 | 36.15 | 34.11 | 53.73 | |||||||||||||
1992 | 34.89 | 40.52 | a | 46.44 | 55.62 | 61.65 | 67.08 | 74.11 | 70.76 | 67.25 | 56.10 | 35.28 | 31.23 | 53.41 | ||||||||||||
1993 | 27.18 | 31.62 | 42.92 | 50.59 | a | 60.79 | 70.82 | 77.21 | 73.85 | 62.45 | 52.27 | 37.60 | 35.20 | a | 51.88 | |||||||||||
1994 | 32.39 | 32.71 | 46.03 | 52.48 | a | 63.79 | 76.85 | 75.81 | 75.81 | 66.88 | 55.26 | 41.98 | 37.79 | 54.82 | ||||||||||||
1995 | 34.50 | 40.88 | 42.34 | 48.66 | a | 56.31 | 67.97 | 74.95 | 78.61 | 66.69 | a | 55.02 | 44.98 | 35.11 | 53.83 | |||||||||||
1996 | 31.10 | 37.71 | a | 38.32 | 53.95 | 66.10 | a | 73.22 | 74.85 | 73.21 | 64.28 | 54.74 | 40.83 | a | 34.97 | 53.61 | ||||||||||
1997 | 31.29 | 35.00 | a | 47.10 | a | 45.47 | 60.97 | 70.88 | 78.42 | 74.03 | 68.62 | 53.52 | 38.30 | 28.98 | a | 52.71 | ||||||||||
1998 | 34.74 | 38.21 | 38.10 | 48.98 | 65.32 | 71.68 | 78.13 | 73.68 | 72.18 | 56.77 | a | 45.55 | a | 33.08 | a | 54.70 | ||||||||||
1999 | 35.39 | 42.30 | 41.68 | c | 50.85 | 59.82 | 70.65 | 78.03 | 75.42 | 64.47 | 53.76 | 48.00 | a | 36.85 | 54.77 | |||||||||||
2000 | 35.34 | 43.47 | 43.00 | 53.20 | 65.10 | 71.60 | a | 78.00 | 79.77 | c | 69.98 | 55.61 | 35.72 | 29.83 | a | 55.05 | ||||||||||
2001 | 28.65 | 31.02 | a | 40.69 | 56.23 | 61.61 | 72.14 | a | 80.56 | 75.98 | 68.19 | a | 55.08 | 45.82 | 36.03 | 54.33 | ||||||||||
2002 | 32.95 | 35.20 | 39.76 | 56.12 | 62.75 | a | 78.55 | 79.42 | 76.84 | 67.02 | 49.66 | 41.02 | 33.18 | 54.37 | ||||||||||||
2003 | 35.55 | 32.91 | 43.89 | 54.05 | 62.85 | 68.15 | 81.06 | 76.74 | 65.15 | 59.10 | 40.95 | 35.47 | a | 54.66 | ||||||||||||
2004 | 33.97 | 33.95 | 48.19 | 52.45 | 66.27 | 70.42 | 72.61 | 70.61 | 68.63 | 55.16 | 40.07 | 36.03 | 54.03 | |||||||||||||
2005 | 33.81 | 37.79 | 42.85 | 51.38 | 61.77 | 72.25 | 78.29 | 74.42 | a | 71.03 | 56.18 | 45.30 | 33.42 | a | 54.87 | |||||||||||
2006 | 39.42 | 34.00 | 43.11 | 57.43 | 64.74 | 76.00 | 78.19 | 74.82 | 62.20 | 53.58 | 44.32 | 31.55 | 54.95 | |||||||||||||
2007 | 19.69 | 26.38 | 47.44 | 48.15 | 62.08 | 70.00 | 76.87 | 79.32 | 70.21 | a | 57.39 | 43.63 | 29.16 | 52.53 | ||||||||||||
2008 | 30.05 | 34.76 | 43.11 | 50.00 | 62.45 | 73.38 | 78.69 | 73.74 | 64.83 | 54.13 | 45.07 | 32.44 | 53.55 | |||||||||||||
2009 | 35.10 | 39.86 | 44.69 | 50.07 | 61.32 | 71.85 | 76.63 | 72.87 | 64.33 | 47.13 | 45.32 | 27.37 | 53.04 | |||||||||||||
2010 | 31.69 | 30.52 | 42.11 | 53.83 | 59.82 | 75.40 | 77.60 | 76.11 | 71.17 | 56.58 | 42.86 | a | 36.13 | 54.49 | ||||||||||||
2011 | 30.66 | 31.29 | 44.18 | 53.53 | a | 61.32 | 75.22 | 82.94 | 81.37 | 67.13 | 55.16 | 41.97 | 26.95 | 54.31 | ||||||||||||
2012 | 34.44 | 35.38 | 50.85 | 55.82 | 64.34 | 76.02 | 80.39 | 75.74 | 66.55 | 51.97 | 47.02 | 34.06 | 56.05 | |||||||||||||
2013 | 31.32 | 34.77 | 42.65 | 46.22 | 62.94 | 76.48 | 76.56 | 76.55 | 70.75 | 52.90 | 40.12 | 31.15 | 53.53 | |||||||||||||
2014 | 32.11 | 32.21 | 42.60 | 52.58 | 62.32 | 72.77 | 76.82 | 76.84 | 67.92 | 57.52 | 40.10 | 33.55 | 53.94 | |||||||||||||
2015 | 33.02 | 34.96 | 45.37 | 54.12 | 58.55 | 74.58 | 77.29 | 75.77 | 72.53 | 58.44 | 41.10 | 33.08 | 54.90 | |||||||||||||
2016 | 34.18 | 40.67 | 46.69 | 52.85 | 58.76 | 75.17 | 78.95 | 73.90 | 69.25 | 60.27 | 48.07 | 29.73 | 55.71 | |||||||||||||
2017 | 31.55 | 42.86 | 48.81 | 53.02 | 59.13 | 73.55 | 78.06 | 70.76 | 67.25 | 55.08 | 46.63 | 34.11 | 55.07 | |||||||||||||
2018 | 34.45 | 34.41 | 47.21 | 49.65 | 68.58 | 77.75 | 78.27 | 73.92 | 68.97 | 52.05 | 39.22 | 33.45 | 54.83 | |||||||||||||
2019 | 33.48 | 31.21 | 39.81 | 54.10 | 58.10 | 69.92 | 78.60 | 77.98 | 74.90 | 49.08 | 40.53 | 36.81 | 53.71 | |||||||||||||
2020 | 36.05 | 33.69 | 47.97 | 52.32 | 64.76 | 78.00 | 78.56 | 77.27 | 65.97 | a | 52.47 | 47.82 | 34.00 | 55.74 | ||||||||||||
2021 | 34.07 | a | 25.96 | 44.29 | 51.25 | 61.31 | 73.80 | 77.11 | 76.74 | 72.30 | 56.98 | 47.18 | 41.95 | 55.25 | ||||||||||||
2022 | 31.98 | 31.23 | 43.80 | a | 54.52 | 64.26 | 74.35 | 81.69 | 76.44 | 70.25 | 56.61 | 39.43 | 33.76 | 54.86 | ||||||||||||
2023 | 32.23 | 34.91 | 41.44 | 52.62 | 64.56 | 69.32 | 76.65 | 76.81 | 70.90 | 56.03 | 44.98 | 38.27 | 54.89 | |||||||||||||
2024 | 27.10 | 42.28 | 44.20 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.86 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.87 | 35.32 | 43.57 | 52.27 | 62.10 | 72.67 | 77.45 | 75.20 | 67.36 | 54.50 | 42.12 | 33.06 | 54.03 | |||||||||||||
S.D. | 4.14 | 4.61 | 3.40 | 3.19 | 2.66 | 2.94 | 2.03 | 2.39 | 2.86 | 2.86 | 3.48 | 3.80 | 0.95 | |||||||||||||
SKEW | -1.16 | -0.55 | -0.30 | -0.13 | 0.17 | -0.08 | 0.15 | 0.34 | 0.18 | -0.54 | -0.25 | -0.75 | -0.11 | |||||||||||||
MAX | 39.61 | 43.47 | 50.97 | 60.67 | 68.58 | 78.55 | 82.94 | 81.37 | 74.90 | 60.27 | 48.07 | 41.95 | 56.05 | |||||||||||||
MIN | 19.69 | 20.93 | 32.57 | 45.47 | 56.31 | 66.62 | 72.61 | 70.61 | 61.37 | 47.13 | 33.88 | 19.53 | 51.88 | |||||||||||||
YRS | 56 | 57 | 56 | 54 | 53 | 55 | 55 | 56 | 57 | 56 | 57 | 55 | 49 |