YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.04 | c | 38.10 | 33.65 | 37.93 | i | ||
1990 | 36.16 | 32.64 | 38.10 | 43.30 | 44.71 | 50.37 | 55.16 | 56.48 | 50.86 | a | 40.13 | 36.77 | 27.86 | c | 42.71 | |||||||||||
1991 | 29.13 | 39.00 | 34.97 | 39.13 | 42.50 | a | 47.67 | 54.87 | 53.65 | 47.90 | 40.06 | 39.93 | a | 34.48 | 41.94 | |||||||||||
1992 | 34.87 | 36.76 | 38.03 | a | 42.00 | b | ----- | z | 52.27 | 53.94 | 50.81 | 45.53 | 42.77 | 38.03 | a | 33.23 | a | 42.57 | a | |||||||
1993 | 28.83 | a | 27.04 | b | 42.04 | h | 43.07 | 47.74 | 50.50 | 53.23 | 54.29 | 49.10 | 45.83 | a | 33.07 | a | 35.45 | 42.56 | a | |||||||
1994 | 36.94 | 34.64 | c | 37.69 | b | 43.28 | a | 48.23 | a | 49.60 | 56.19 | 53.00 | 51.27 | 42.39 | 36.37 | 37.61 | 43.93 | |||||||||
1995 | 39.00 | a | 41.18 | 38.40 | a | 40.17 | 45.74 | 50.37 | 56.87 | a | 50.83 | a | 53.90 | a | 44.45 | 45.10 | 40.26 | 45.52 | ||||||||
1996 | 38.19 | 37.55 | 37.70 | a | 41.00 | 43.94 | 49.55 | a | 57.00 | a | 53.55 | 47.52 | a | 45.20 | a | 41.20 | 37.90 | 44.19 | ||||||||
1997 | 34.81 | 36.14 | 37.81 | 41.03 | 48.32 | c | 51.46 | b | 55.03 | b | 55.25 | c | 50.33 | 44.20 | a | 41.33 | 33.63 | a | 44.11 | |||||||
1998 | 38.77 | a | 37.04 | b | 37.84 | 39.30 | c | 46.24 | b | 50.53 | 56.94 | 54.16 | 49.63 | 42.43 | a | 40.76 | a | 31.97 | 43.80 | |||||||
1999 | 35.90 | 35.37 | a | 35.93 | c | 38.24 | a | 41.32 | c | 46.80 | e | 51.80 | f | 54.80 | a | 44.87 | g | 39.83 | b | 43.58 | f | 36.61 | c | 40.53 | c | |
2000 | 35.87 | 40.17 | 35.61 | 41.13 | 46.83 | a | 52.63 | 54.23 | a | 53.03 | a | 49.62 | a | 43.29 | c | 35.11 | b | 35.69 | b | 43.60 | ||||||
2001 | 33.35 | 32.93 | a | 36.97 | a | 38.19 | c | 44.43 | j | 48.38 | f | 53.35 | h | 53.35 | e | 48.95 | h | 42.30 | h | 41.37 | c | 36.61 | c | 38.97 | e | |
2002 | 37.18 | c | 35.56 | c | 33.97 | b | 40.11 | c | 43.10 | a | 50.82 | b | 55.77 | i | 52.85 | d | 48.57 | b | 38.52 | b | 36.43 | b | 38.55 | 41.42 | a | |
2003 | 38.83 | b | 34.67 | a | 39.93 | b | 39.76 | a | 44.40 | a | 51.37 | 55.13 | 55.67 | a | 50.30 | 45.97 | a | 38.73 | d | 38.70 | a | 44.45 | ||||
2004 | 38.13 | 37.41 | b | 39.10 | a | 40.20 | 48.14 | c | 52.20 | 55.77 | 57.20 | a | 51.03 | 45.55 | b | 38.81 | c | 38.53 | a | 45.17 | ||||||
2005 | 35.03 | 34.89 | a | 39.77 | a | 40.64 | b | 48.93 | b | 51.36 | b | 55.79 | c | 55.61 | c | 47.17 | 46.07 | b | 39.61 | b | 36.81 | 44.31 | ||||
2006 | 38.00 | a | 31.91 | e | 36.50 | c | 41.07 | a | 46.42 | e | 54.63 | c | 57.07 | b | 53.12 | e | 48.72 | a | 41.00 | a | 40.17 | 35.04 | g | 44.42 | a | |
2007 | 30.77 | 36.79 | 39.17 | b | 40.17 | a | 44.76 | b | 49.41 | c | 58.24 | b | 54.25 | c | 48.20 | 43.19 | 38.17 | 36.29 | 43.28 | |||||||
2008 | 32.03 | 34.90 | 35.66 | b | 36.43 | 46.29 | 47.34 | a | 55.43 | a | 54.61 | 47.30 | 42.68 | 43.03 | 33.45 | 42.43 | ||||||||||
2009 | 34.00 | 34.64 | 35.71 | 37.97 | 45.29 | 54.03 | 57.39 | 54.71 | 49.73 | 43.06 | 37.60 | 31.03 | 42.93 | |||||||||||||
2010 | 40.77 | 38.64 | 36.39 | 38.90 | 43.23 | 50.13 | 54.32 | 54.06 | 51.87 | 44.84 | 39.70 | 37.29 | 44.18 | |||||||||||||
2011 | 36.10 | 32.25 | 38.97 | 37.97 | 43.16 | 49.77 | 53.45 | 54.84 | 50.87 | 45.13 | 38.40 | 31.84 | 42.73 | |||||||||||||
2012 | 34.58 | 34.72 | 36.03 | 42.97 | 44.00 | 48.83 | 54.45 | 55.39 | 48.80 | 43.13 | 42.00 | 36.87 | 43.48 | |||||||||||||
2013 | 32.23 | 36.11 | 38.39 | 41.93 | 47.26 | 52.73 | 57.06 | 56.97 | 53.67 | 41.74 | 38.60 | 29.42 | 43.84 | |||||||||||||
2014 | 33.94 | 38.61 | 39.29 | 40.43 | 47.52 | 52.77 | 58.55 | 57.35 | 51.43 | 47.45 | 40.03 | 39.81 | 45.60 | |||||||||||||
2015 | 37.07 | a | 39.43 | 39.69 | b | 39.30 | 48.00 | 55.62 | a | 58.73 | a | 55.65 | 48.03 | 46.48 | 36.77 | 37.97 | 45.23 | |||||||||
2016 | 35.23 | 39.17 | 39.55 | 43.13 | 47.55 | 50.33 | 55.35 | 54.27 | a | 47.43 | 47.06 | 41.80 | 31.97 | 44.40 | ||||||||||||
2017 | 30.48 | 36.54 | b | 38.52 | 39.03 | 45.32 | 51.50 | 56.13 | 56.77 | 50.69 | a | 42.32 | 37.38 | a | 32.40 | a | 43.09 | |||||||||
2018 | 37.19 | 32.43 | 34.35 | 39.93 | 49.16 | 50.81 | c | 56.33 | a | 53.67 | d | 45.67 | 41.73 | a | 38.17 | a | 35.38 | b | 42.90 | |||||||
2019 | 35.33 | a | 33.85 | a | 33.90 | 44.69 | a | 45.48 | 51.36 | b | 56.30 | a | 57.39 | 53.43 | 37.48 | 34.40 | 34.94 | 43.21 | ||||||||
2020 | 37.58 | 34.68 | a | 35.68 | 41.40 | 47.30 | a | 53.60 | 56.17 | a | 57.59 | b | 51.55 | a | 43.48 | 36.57 | 36.16 | 44.31 | ||||||||
2021 | 37.55 | 36.93 | 34.87 | 36.73 | 45.97 | 53.77 | 58.00 | 57.13 | 49.40 | 44.13 | 41.32 | b | 38.13 | 44.49 | ||||||||||||
2022 | 35.32 | 33.15 | b | 39.90 | a | 37.30 | 44.00 | 52.53 | 57.58 | 57.80 | a | 54.54 | b | 47.67 | a | 35.43 | 35.13 | 44.20 | ||||||||
2023 | 34.61 | 30.68 | 33.94 | 39.53 | 47.77 | a | 51.70 | 57.10 | a | 59.32 | 50.69 | a | 47.23 | 39.43 | 40.52 | 44.38 | ||||||||||
2024 | 40.32 | 38.86 | a | 36.29 | 39.09 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.49 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 35.55 | 35.64 | 37.19 | 40.28 | 45.89 | 51.16 | 56.06 | 54.98 | 49.84 | 43.49 | 38.81 | 35.47 | 43.87 | |||||||||||||
S.D. | 2.93 | 2.96 | 1.91 | 2.01 | 2.05 | 2.02 | 1.47 | 1.96 | 2.26 | 2.57 | 2.58 | 3.06 | 0.93 | |||||||||||||
SKEW | -0.55 | -0.51 | -0.21 | 0.15 | -0.33 | -0.04 | -0.07 | -0.01 | 0.18 | -0.31 | 0.05 | -0.50 | -0.04 | |||||||||||||
MAX | 40.77 | 41.18 | 39.93 | 44.69 | 49.16 | 55.62 | 58.73 | 59.32 | 54.54 | 47.67 | 45.10 | 40.52 | 45.60 | |||||||||||||
MIN | 28.83 | 27.04 | 33.90 | 36.43 | 41.32 | 46.80 | 53.23 | 50.81 | 45.53 | 37.48 | 33.07 | 27.86 | 41.94 | |||||||||||||
YRS | 35 | 35 | 34 | 34 | 32 | 33 | 31 | 34 | 32 | 34 | 34 | 34 | 28 |