YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 44.96 | g | 34.52 | 34.52 | k | |
1969 | 37.87 | 32.86 | ----- | z | 50.55 | a | 59.87 | 62.83 | 75.00 | 78.29 | 71.07 | 53.10 | 46.90 | 41.55 | 55.44 | a | ||||||||||
1970 | 39.23 | 44.11 | 43.77 | 43.67 | 61.19 | 69.57 | 78.32 | 78.61 | 68.43 | 57.94 | 47.40 | 33.84 | 55.51 | |||||||||||||
1971 | 39.39 | 42.32 | 45.29 | 45.97 | 50.68 | 65.33 | 76.94 | 77.81 | 69.03 | 52.39 | 43.17 | 30.68 | 53.25 | |||||||||||||
1972 | 37.39 | 45.34 | 51.52 | 49.43 | 60.16 | 68.33 | 78.39 | 74.10 | 65.50 | 52.13 | a | 40.03 | a | 34.16 | 54.71 | |||||||||||
1973 | 33.84 | 37.14 | 34.23 | 46.27 | 60.26 | 70.67 | 75.68 | 73.87 | 67.10 | 57.45 | 40.93 | 38.65 | 53.01 | |||||||||||||
1974 | 36.10 | 43.64 | 44.84 | 47.13 | 60.16 | 72.03 | 75.06 | 74.81 | 73.73 | 57.74 | 45.20 | 36.35 | 55.57 | |||||||||||||
1975 | 38.19 | 37.44 | a | 40.03 | 38.00 | 56.32 | 68.20 | 72.77 | 71.48 | 70.33 | 54.32 | 45.17 | 40.61 | 52.74 | ||||||||||||
1976 | 43.10 | 42.24 | 42.81 | 45.70 | 61.77 | 66.23 | 74.74 | 66.35 | 64.70 | 57.58 | 50.83 | 43.65 | 54.98 | |||||||||||||
1977 | 37.61 | 47.39 | 39.84 | 54.37 | 46.26 | 70.27 | 75.48 | 74.81 | 65.80 | 60.48 | 48.10 | 42.71 | 55.26 | |||||||||||||
1978 | 35.55 | 35.61 | 40.97 | 44.07 | 56.26 | 67.93 | 74.81 | 74.29 | 62.77 | 63.42 | 41.77 | 33.55 | 52.58 | |||||||||||||
1979 | 33.61 | 34.96 | 40.29 | 47.70 | ----- | z | 69.27 | 74.93 | a | 70.60 | a | 73.17 | 59.68 | 43.97 | a | 41.39 | 53.60 | a | ||||||||
1980 | 38.87 | 41.97 | 38.90 | 50.10 | 50.32 | 62.69 | a | 75.06 | 72.35 | 67.67 | 60.16 | 50.67 | 43.10 | 54.32 | ||||||||||||
1981 | 40.77 | 44.07 | 41.94 | 53.67 | 57.26 | 72.53 | 76.55 | 78.06 | 69.87 | 51.67 | a | 45.40 | 41.29 | 56.09 | ||||||||||||
1982 | 35.19 | 43.68 | 39.42 | 45.77 | 58.68 | 63.33 | 71.19 | 73.06 | o | 58.25 | r | 53.84 | 41.27 | 36.55 | 48.89 | b | ||||||||||
1983 | 38.87 | a | 39.46 | 40.45 | 41.47 | 55.13 | 64.43 | 70.45 | 71.10 | 69.57 | 56.90 | a | 41.93 | 37.13 | 52.24 | |||||||||||
1984 | 41.10 | 42.07 | 47.42 | 46.53 | 64.87 | a | 67.13 | 76.23 | a | 74.81 | 70.07 | 50.52 | 41.41 | a | 33.61 | 54.65 | ||||||||||
1985 | 36.55 | 41.68 | 40.74 | 55.43 | 58.32 | 71.73 | 77.68 | 74.32 | 59.38 | a | 56.45 | 41.10 | 37.48 | 54.24 | ||||||||||||
1986 | 44.77 | 41.32 | 49.68 | 49.27 | 58.65 | 71.00 | 71.87 | 77.06 | 59.07 | 55.32 | 48.47 | 40.61 | 55.59 | |||||||||||||
1987 | 37.26 | 39.71 | 42.58 | 57.67 | 57.27 | a | 71.17 | 69.50 | a | 76.35 | 69.57 | 61.39 | 43.53 | 34.42 | 55.03 | |||||||||||
1988 | 37.61 | 47.79 | 47.94 | 50.93 | 56.29 | 67.03 | 78.39 | 74.81 | 69.00 | 65.81 | 43.57 | 36.16 | 56.28 | |||||||||||||
1989 | 36.23 | 38.86 | 46.84 | 57.77 | 57.03 | 68.43 | 77.68 | 72.77 | 66.67 | 56.06 | 50.67 | 43.16 | 56.01 | |||||||||||||
1990 | 37.84 | 38.43 | 47.39 | 54.00 | b | 57.68 | 68.80 | 78.29 | 74.26 | 67.97 | 63.29 | 48.57 | 34.68 | 55.93 | ||||||||||||
1991 | 42.74 | 50.00 | 37.23 | 47.80 | 53.87 | a | 65.17 | 76.97 | 73.58 | 72.30 | 63.26 | 48.37 | 41.81 | 56.09 | ||||||||||||
1992 | 41.71 | 44.45 | 45.74 | 57.53 | 65.29 | 67.60 | 71.81 | 77.40 | a | ----- | z | 60.77 | 46.77 | 34.35 | 55.77 | a | ||||||||||
1993 | 37.29 | c | 37.68 | 48.20 | a | 50.67 | 60.39 | 65.47 | 72.29 | 73.10 | b | 69.57 | 58.27 | a | 47.03 | 35.87 | 54.65 | |||||||||
1994 | 43.10 | 38.89 | a | 49.55 | b | 50.86 | a | 56.97 | 71.60 | 78.83 | a | 77.73 | a | 69.36 | b | 55.23 | a | 37.47 | 37.55 | 55.59 | ||||||
1995 | 35.34 | b | 51.79 | 44.00 | d | 47.97 | 51.74 | 62.97 | 74.35 | 76.10 | 71.83 | 64.61 | 55.90 | 41.32 | 56.49 | |||||||||||
1996 | 40.13 | 41.89 | a | 46.74 | 53.37 | 60.10 | 69.00 | a | 77.20 | a | 78.23 | 68.77 | 57.35 | 44.87 | 37.94 | 56.30 | ||||||||||
1997 | 38.42 | 43.04 | 52.81 | 50.90 | 64.90 | 65.40 | 72.81 | 75.29 | 68.87 | 57.48 | 45.43 | 34.55 | 55.82 | |||||||||||||
1998 | 37.84 | 33.21 | d | 44.03 | a | 42.72 | a | 46.57 | a | 59.43 | 75.23 | 77.94 | 64.63 | 54.42 | 44.20 | 37.19 | 51.45 | |||||||||
1999 | 41.03 | 40.43 | 44.10 | a | 44.33 | 58.00 | 64.77 | 73.06 | 72.90 | 72.27 | 65.74 | 52.50 | 42.94 | 56.01 | ||||||||||||
2000 | 40.42 | 39.83 | 45.10 | 53.40 | 61.55 | 72.23 | d | 74.29 | 75.61 | 68.17 | 54.65 | 40.93 | 43.90 | 55.84 | ||||||||||||
2001 | 35.74 | 35.79 | 46.53 | a | 46.03 | 68.53 | a | 72.21 | b | 72.67 | a | 77.56 | f | 72.23 | 65.43 | a | 46.21 | b | 32.30 | a | 53.97 | a | ||||
2002 | 37.52 | b | 46.48 | a | 43.23 | 51.93 | 56.63 | a | 70.63 | 79.14 | b | 73.72 | f | 71.07 | 56.67 | a | 49.37 | 36.10 | 54.43 | a | ||||||
2003 | 44.57 | a | 40.86 | 45.52 | 42.79 | a | 57.84 | 70.30 | 78.06 | 73.83 | a | 74.21 | a | 66.81 | 40.64 | b | 36.57 | c | 56.00 | |||||||
2004 | 37.32 | 36.54 | a | 53.27 | a | 53.23 | 60.20 | a | 70.24 | a | 76.63 | a | 75.94 | 68.90 | a | 52.32 | c | 43.04 | b | 37.57 | a | 55.43 | ||||
2005 | 35.55 | b | 40.11 | 45.23 | 48.07 | a | 57.21 | b | 63.41 | c | 79.12 | f | 76.04 | g | 64.76 | a | 57.39 | 50.47 | 41.62 | e | 50.38 | b | ||||
2006 | 38.21 | b | 42.96 | a | 35.73 | a | 45.27 | 62.21 | b | 72.23 | d | 78.41 | b | 75.03 | b | 69.56 | c | 55.70 | d | 48.38 | a | 36.77 | 55.04 | |||
2007 | 34.70 | a | 40.29 | 50.77 | a | 51.69 | a | 61.03 | a | 72.10 | i | 77.81 | d | 77.83 | b | 67.59 | c | 57.27 | a | 52.57 | 34.10 | a | 55.06 | a | ||
2008 | 35.46 | e | 40.18 | a | 46.90 | b | 51.85 | d | 58.04 | e | 71.33 | c | 76.35 | 77.31 | b | 71.46 | b | 60.32 | 47.31 | a | 36.75 | g | 57.87 | a | ||
2009 | 42.08 | f | 37.89 | 43.77 | 48.74 | c | 64.77 | 62.41 | a | 78.42 | 74.90 | 73.85 | c | 54.71 | c | 47.43 | b | 33.94 | 56.44 | a | ||||||
2010 | 37.79 | b | 38.63 | a | 44.03 | a | 45.39 | b | 52.41 | b | 67.54 | d | 76.28 | b | 77.33 | d | 72.26 | c | 56.66 | b | 42.22 | c | 35.80 | a | 53.86 | |
2011 | 40.10 | 36.64 | 42.29 | 48.83 | a | 52.45 | i | 65.42 | d | 73.23 | a | 76.41 | b | 71.78 | g | 59.62 | g | 41.74 | c | 40.33 | d | 51.67 | c | |||
2012 | 43.93 | b | 40.89 | b | 45.38 | e | 51.17 | 62.81 | d | 71.10 | a | 75.36 | c | 78.31 | e | 73.23 | h | 58.45 | b | 47.29 | b | 34.70 | a | 55.40 | a | |
2013 | 34.58 | 38.89 | a | 48.86 | b | 54.50 | b | 59.27 | a | 72.13 | 78.61 | 74.73 | a | 68.07 | a | 55.73 | e | 47.18 | b | 38.10 | a | 55.89 | ||||
2014 | 48.20 | a | 42.79 | 48.04 | d | 52.68 | e | 60.43 | a | 71.17 | a | 78.56 | d | 74.23 | 69.71 | b | 63.61 | 47.38 | a | 38.17 | b | 57.91 | ||||
2015 | 44.03 | a | 50.52 | a | 52.35 | 50.71 | i | 54.40 | f | 71.93 | b | 71.25 | o | 76.73 | t | 70.54 | d | 59.00 | a | 39.14 | a | 33.00 | e | 52.56 | d | |
2016 | 36.60 | f | 46.04 | a | 46.19 | 52.39 | b | 55.70 | a | 71.69 | d | 78.16 | f | 76.11 | c | 67.93 | b | 57.86 | i | 49.31 | a | 36.67 | d | 55.78 | c | |
2017 | 32.64 | c | 40.12 | c | 51.26 | 50.80 | 65.06 | 74.03 | a | 80.77 | 78.90 | a | 70.53 | 63.90 | 52.57 | 44.87 | 58.79 | |||||||||
2018 | 44.81 | 43.04 | 41.60 | a | 54.53 | 58.30 | a | 71.24 | a | 78.90 | 76.86 | b | 70.96 | b | 56.00 | 49.69 | d | 39.57 | j | 58.72 | a | |||||
2019 | 38.28 | b | 32.14 | 40.52 | 51.72 | a | 50.42 | 68.73 | 73.74 | 75.84 | 68.25 | f | 57.96 | d | 51.55 | a | 35.42 | 52.39 | a | |||||||
2020 | 41.87 | 44.96 | b | 39.47 | a | 50.53 | 61.80 | a | 68.52 | a | 76.57 | c | 79.38 | b | 74.38 | a | 67.58 | 49.83 | 41.17 | a | 58.01 | |||||
2021 | 40.58 | 44.14 | 42.29 | 54.53 | 63.42 | 76.63 | 82.05 | j | 82.38 | w | ----- | z | ----- | z | ----- | z | ----- | z | 53.60 | f | ||||||
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.47 | a | 49.37 | 46.68 | 51.84 | i | ||
2024 | 40.86 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.84 | 41.19 | 44.57 | 49.65 | 58.40 | 68.57 | 75.74 | 75.36 | 69.03 | 58.32 | 46.15 | 37.91 | 55.20 | |||||||||||||
S.D. | 3.37 | 4.30 | 4.35 | 4.36 | 4.68 | 3.56 | 2.59 | 2.54 | 3.37 | 4.25 | 4.06 | 3.74 | 1.58 | |||||||||||||
SKEW | 0.55 | 0.21 | -0.03 | -0.29 | -0.54 | -0.40 | -0.43 | -0.98 | -0.97 | 0.42 | 0.01 | 0.36 | -0.27 | |||||||||||||
MAX | 48.20 | 51.79 | 53.27 | 57.77 | 68.53 | 76.63 | 80.77 | 79.38 | 74.38 | 67.58 | 55.90 | 46.68 | 58.79 | |||||||||||||
MIN | 32.64 | 32.14 | 34.23 | 38.00 | 46.26 | 59.43 | 69.50 | 66.35 | 59.07 | 50.52 | 37.47 | 30.68 | 51.45 | |||||||||||||
YRS | 51 | 53 | 52 | 52 | 50 | 52 | 49 | 47 | 47 | 51 | 53 | 52 | 36 |