YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 40.20 | f | ----- | z |
1989 | 39.68 | c | 37.88 | d | 54.64 | c | 57.85 | c | 67.75 | c | 70.57 | 78.58 | 74.10 | a | ----- | z | 60.83 | b | 51.21 | b | 38.55 | b | 57.42 | a | ||
1990 | 41.14 | b | 42.59 | a | 49.27 | e | 55.80 | 61.23 | a | 78.73 | 74.42 | 73.29 | 70.38 | a | 60.55 | 49.85 | c | 37.52 | b | 57.90 | ||||||
1991 | 38.07 | d | 46.96 | 45.77 | a | 52.59 | c | 65.58 | 72.59 | a | 74.45 | 73.65 | 67.79 | a | 61.16 | 42.96 | e | 39.00 | c | 56.71 | ||||||
1992 | 40.59 | b | 41.48 | 46.03 | 59.36 | b | 65.16 | 69.10 | 74.19 | d | 73.10 | b | 69.61 | b | 61.84 | 38.37 | c | 36.62 | b | 56.29 | ||||||
1993 | 38.29 | c | 38.14 | 46.71 | 61.66 | a | 62.90 | 72.89 | b | 78.61 | 72.83 | b | 68.56 | e | 58.73 | a | 44.19 | c | 38.71 | c | 56.85 | |||||
1994 | 39.45 | b | 40.23 | b | 50.03 | a | 53.42 | f | 64.47 | a | 78.25 | b | 79.55 | 76.23 | 70.00 | d | 57.87 | a | 44.96 | d | 42.83 | b | 58.53 | a | ||
1995 | 39.00 | c | 45.67 | a | 47.41 | d | 51.00 | b | 55.60 | a | 68.31 | a | 75.21 | b | 79.30 | a | 67.14 | b | 61.27 | a | 50.14 | i | 44.50 | k | 58.99 | b |
1996 | 41.15 | e | 45.82 | a | 46.71 | 55.20 | 69.14 | c | 74.23 | 78.73 | a | 76.54 | c | 66.00 | 59.94 | 48.68 | b | 39.40 | a | 58.46 | ||||||
1997 | 37.73 | a | 39.68 | 53.06 | 48.55 | a | 63.21 | b | 72.37 | 78.58 | 74.55 | 71.89 | c | 60.48 | d | 42.08 | d | 36.37 | a | 56.55 | ||||||
1998 | 38.72 | b | 37.92 | b | 45.60 | a | 50.00 | 66.10 | 73.29 | b | 77.81 | 75.53 | a | 74.28 | a | 59.17 | a | 49.35 | d | 41.10 | 57.40 | |||||
1999 | 41.04 | c | 48.21 | 52.43 | a | 48.50 | b | 61.43 | a | 71.27 | 77.03 | a | 73.48 | 67.97 | a | 64.35 | 56.97 | 39.54 | c | 58.52 | ||||||
2000 | 39.53 | a | 46.34 | 46.97 | a | 60.33 | 70.84 | 76.72 | a | 81.42 | 79.87 | 73.62 | a | 59.52 | 38.11 | b | 37.37 | a | 59.22 | |||||||
2001 | 36.68 | 40.18 | 43.23 | 56.00 | a | 63.80 | a | 73.72 | a | 76.73 | a | 70.52 | 73.43 | b | 62.63 | a | 49.68 | b | 40.67 | a | 57.27 | |||||
2002 | 40.63 | d | 41.57 | 47.03 | 59.66 | a | 66.52 | b | 79.86 | a | 81.47 | a | 78.67 | a | 68.90 | a | 55.93 | a | 45.69 | a | 39.27 | a | 58.77 | |||
2003 | 47.60 | a | 36.30 | a | 45.83 | b | 56.67 | 65.16 | 69.86 | a | 82.70 | a | 76.48 | d | 69.20 | 64.42 | 46.00 | c | 42.07 | a | 58.52 | |||||
2004 | 41.24 | b | 36.10 | 53.52 | 53.03 | a | 67.19 | 71.54 | d | 75.43 | c | 72.63 | a | 67.80 | e | 58.13 | a | 42.73 | h | 39.63 | d | 57.84 | a | |||
2005 | 41.10 | a | 40.68 | 44.42 | 55.43 | b | 65.78 | d | 74.22 | c | 82.68 | 73.37 | a | 71.74 | c | 59.42 | 48.07 | a | 36.03 | b | 57.74 | |||||
2006 | 40.31 | b | 40.62 | b | 45.52 | 60.83 | 67.72 | b | 78.07 | b | 77.88 | f | 73.00 | b | 63.67 | 55.24 | b | 47.86 | a | 37.83 | g | 57.28 | b | |||
2007 | 33.34 | b | 40.30 | a | 49.07 | a | 53.22 | c | 62.83 | b | 74.97 | a | 78.87 | 77.10 | a | 69.59 | h | 61.93 | a | 52.04 | b | 32.27 | a | 55.99 | a | |
2008 | 31.50 | a | 38.66 | 42.62 | b | 51.52 | e | 63.13 | a | 75.20 | 81.10 | 75.26 | 68.77 | 59.57 | a | 49.90 | a | 37.52 | 56.23 | |||||||
2009 | 39.77 | 42.18 | 50.48 | 52.33 | 65.03 | 69.30 | 77.16 | 74.71 | 66.40 | 52.61 | 47.30 | 29.96 | d | 55.60 | ||||||||||||
2010 | 36.81 | 33.93 | a | 44.68 | 53.93 | 61.71 | 76.17 | a | 79.07 | b | 75.13 | 73.83 | 58.87 | 44.59 | a | 42.32 | c | 56.75 | ||||||||
2011 | 36.97 | a | 36.19 | a | 49.81 | 55.70 | 61.20 | a | 77.80 | 80.46 | c | 78.77 | 68.17 | 57.48 | b | 44.50 | 34.89 | m | 58.82 | a | ||||||
2012 | 40.90 | a | 37.07 | 53.32 | 60.30 | 67.03 | 81.87 | 80.84 | 78.19 | 70.27 | 59.65 | 51.53 | 36.68 | 59.80 | ||||||||||||
2013 | 35.19 | 36.71 | 46.32 | 50.97 | 61.68 | 78.00 | 77.30 | a | 76.48 | 69.77 | 55.71 | 44.57 | 34.84 | 55.63 | ||||||||||||
2014 | 35.90 | 38.75 | 46.83 | a | 52.93 | a | 61.61 | 74.63 | 75.55 | 72.52 | 70.47 | 60.23 | 45.37 | 37.35 | 56.01 | |||||||||||
2015 | 38.48 | 41.86 | 51.81 | 54.00 | 57.48 | 75.10 | 74.07 | a | 76.48 | 73.33 | 61.65 | 44.77 | 35.26 | 57.02 | ||||||||||||
2016 | 36.10 | 42.76 | 48.48 | 52.40 | 61.55 | 76.60 | 80.10 | 73.10 | 71.33 | 63.67 | g | 50.60 | 39.65 | 57.51 | a | |||||||||||
2017 | 35.58 | 44.86 | 55.03 | 54.20 | 61.81 | 76.20 | 77.87 | 73.52 | 68.03 | 60.77 | 54.63 | 43.29 | 58.82 | |||||||||||||
2018 | 44.10 | 41.64 | 51.00 | 57.43 | 69.48 | 81.40 | 81.13 | 76.32 | 74.27 | 57.29 | 42.90 | 39.03 | 59.67 | |||||||||||||
2019 | 37.48 | 39.39 | 46.97 | 56.73 | 57.55 | 71.97 | 80.94 | 79.45 | 74.70 | 52.06 | 46.13 | 36.23 | 56.63 | |||||||||||||
2020 | 38.32 | 37.52 | 48.74 | 54.97 | 70.16 | 76.13 | 80.10 | 81.26 | 71.53 | 62.77 | a | 49.20 | 36.84 | 58.96 | ||||||||||||
2021 | 37.42 | 38.96 | 44.90 | 54.27 | 63.23 | 77.03 | 78.26 | 78.32 | 74.73 | 59.39 | 52.73 | 43.65 | 58.57 | |||||||||||||
2022 | 41.42 | 36.25 | 47.30 | a | 56.10 | 66.30 | a | 75.97 | 79.87 | 75.29 | 73.47 | 58.03 | 44.40 | 38.71 | 57.76 | |||||||||||
2023 | 36.03 | 40.43 | 44.10 | 55.60 | 64.55 | 69.90 | 81.10 | 78.03 | 70.43 | 59.37 | a | 47.77 | 40.26 | 57.30 | ||||||||||||
2024 | 36.06 | 40.72 | 44.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.45 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.70 | 40.40 | 48.06 | 54.97 | 64.17 | 74.68 | 78.57 | 75.63 | 70.35 | 59.38 | 47.18 | 38.39 | 57.59 | |||||||||||||
S.D. | 2.98 | 3.42 | 3.33 | 3.42 | 3.52 | 3.50 | 2.50 | 2.56 | 2.82 | 2.81 | 4.20 | 3.01 | 1.22 | |||||||||||||
SKEW | 0.31 | 0.48 | 0.53 | 0.11 | -0.28 | 0.05 | -0.30 | 0.27 | -0.14 | -0.69 | 0.02 | -0.54 | 0.12 | |||||||||||||
MAX | 47.60 | 48.21 | 55.03 | 61.66 | 70.84 | 81.87 | 82.70 | 81.26 | 74.73 | 64.42 | 56.97 | 43.65 | 59.80 | |||||||||||||
MIN | 31.50 | 33.93 | 42.62 | 48.50 | 55.60 | 68.31 | 74.07 | 70.52 | 63.67 | 52.06 | 38.11 | 29.96 | 55.60 | |||||||||||||
YRS | 36 | 36 | 36 | 34 | 35 | 35 | 34 | 35 | 33 | 34 | 33 | 32 | 27 |