YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 44.33 | j | 58.67 | 58.65 | 59.41 | b | 51.24 | a | 39.63 | a | 29.24 | a | 21.13 | 45.42 | e | |||
1961 | 23.59 | b | 25.26 | a | 30.67 | a | 37.29 | b | 43.77 | a | 54.50 | 56.97 | 58.17 | a | 48.68 | b | 36.25 | c | 28.59 | a | 26.13 | a | 39.15 | |||
1962 | 19.81 | 28.24 | c | 22.81 | 39.38 | a | 41.68 | c | 51.21 | f | 56.26 | 58.25 | c | 51.48 | c | 39.55 | 30.33 | 25.52 | b | 37.57 | a | |||||
1963 | 20.29 | 25.61 | 28.67 | a | 37.07 | a | 45.87 | a | 51.34 | a | 64.83 | a | 57.83 | a | 52.04 | c | 41.40 | a | 30.53 | 20.57 | a | 39.67 | ||||
1964 | 17.06 | 20.37 | b | 35.33 | m | 37.37 | 47.90 | 53.53 | 60.58 | 60.71 | 51.30 | 40.47 | a | 33.27 | 26.16 | 40.79 | a | |||||||||
1965 | 28.50 | a | 25.32 | 31.61 | 39.73 | 43.72 | b | 50.25 | b | 57.90 | 56.63 | a | 49.83 | 38.13 | 34.80 | 25.23 | 40.14 | |||||||||
1966 | 20.65 | 23.52 | c | 30.03 | 42.87 | 48.42 | 52.59 | h | 60.68 | 57.74 | 51.13 | 38.13 | 34.03 | a | 21.87 | 39.01 | a | |||||||||
1967 | 21.50 | a | 28.68 | 33.57 | a | 36.79 | a | 43.00 | a | ----- | z | 61.35 | 57.45 | 51.32 | b | 41.10 | 34.13 | 21.27 | a | 39.11 | a | |||||
1968 | 25.58 | 31.38 | 32.52 | 36.47 | 43.94 | 54.43 | 59.40 | a | 55.03 | a | 48.91 | h | 39.81 | 29.45 | a | 18.71 | 38.79 | a | ||||||||
1969 | 27.68 | 25.79 | 24.55 | 36.07 | 43.61 | 50.50 | 61.13 | 60.71 | 51.90 | 40.29 | 27.41 | a | 26.20 | a | 39.65 | |||||||||||
1970 | 23.55 | 26.64 | 28.61 | 31.63 | 44.97 | 52.00 | 61.74 | 59.26 | 49.33 | f | 36.48 | 28.40 | 24.65 | 37.99 | a | |||||||||||
1971 | 17.90 | j | 26.79 | 30.81 | 32.47 | 39.35 | 52.59 | a | 60.17 | a | 57.45 | 51.17 | 38.32 | 30.37 | 25.45 | 40.45 | a | |||||||||
1972 | 26.63 | a | 26.66 | 33.00 | a | 34.60 | 40.32 | 56.17 | 61.52 | 56.55 | 52.50 | 44.84 | 24.90 | 23.10 | 40.06 | |||||||||||
1973 | 20.97 | 24.79 | 28.68 | 31.03 | 44.55 | 51.10 | 58.67 | a | 58.77 | 49.67 | 34.30 | a | 27.37 | 21.10 | 37.58 | |||||||||||
1974 | 22.52 | 20.04 | a | ----- | z | 36.43 | 44.14 | c | 54.23 | 57.48 | 54.26 | 49.97 | 42.58 | e | 28.40 | 21.73 | a | 39.25 | a | |||||||
1975 | 24.13 | 25.75 | 30.06 | 29.90 | 38.00 | 50.13 | 57.19 | 56.48 | 48.30 | 38.23 | 27.53 | 21.35 | 37.26 | |||||||||||||
1976 | 18.35 | 22.55 | 23.04 | e | 30.07 | 40.40 | a | 48.07 | 54.13 | 55.45 | 46.27 | 31.81 | 23.53 | 18.90 | 34.38 | |||||||||||
1977 | 21.21 | g | 24.68 | 20.90 | 22.46 | b | 39.10 | a | 48.90 | 58.53 | a | 47.48 | b | ----- | z | 37.23 | a | 28.57 | 26.42 | 35.43 | b | |||||
1978 | 24.60 | a | 26.64 | 34.16 | 36.23 | 40.65 | 57.08 | f | 61.84 | 57.26 | 48.70 | 40.13 | 32.73 | 22.21 | b | 38.65 | a | |||||||||
1979 | 21.89 | c | 26.15 | b | 28.07 | a | 35.62 | a | ----- | z | 50.39 | b | 61.12 | e | 53.87 | h | 49.95 | h | 40.00 | a | 25.30 | 23.24 | b | 34.64 | c | |
1980 | 27.74 | 28.48 | 27.89 | d | 33.23 | 40.21 | g | 55.22 | c | 61.29 | 58.96 | c | 51.41 | a | 36.16 | 26.79 | b | 26.40 | a | 39.42 | a | |||||
1981 | 27.55 | 27.61 | 29.68 | 36.70 | 44.80 | a | 59.60 | 61.10 | 55.52 | d | 51.47 | 40.58 | 31.57 | 27.97 | 41.18 | |||||||||||
1982 | 25.86 | b | 28.07 | 33.00 | 37.07 | a | 42.53 | a | 50.23 | 59.20 | a | 57.61 | h | 51.23 | 35.58 | 31.10 | a | 25.20 | a | 38.10 | a | |||||
1983 | 24.03 | a | 28.68 | 33.00 | a | 30.90 | 46.94 | n | 51.11 | b | 59.70 | a | 59.35 | 56.00 | 42.61 | 32.90 | 27.03 | 40.48 | a | |||||||
1984 | 23.74 | 23.78 | b | 29.32 | 34.73 | 51.77 | a | 53.72 | a | 56.83 | a | 56.84 | 50.25 | b | 39.67 | a | 29.10 | 28.32 | 39.84 | |||||||
1985 | 24.35 | 24.96 | a | 31.16 | 39.77 | 45.97 | 53.07 | 57.00 | b | 58.14 | b | 49.23 | 40.23 | a | 31.66 | a | 24.80 | a | 40.03 | |||||||
1986 | 24.94 | 31.46 | 32.80 | a | 39.93 | 45.35 | 55.07 | 58.58 | 59.13 | a | 47.23 | 38.45 | 31.69 | a | 26.03 | 40.89 | ||||||||||
1987 | 21.97 | a | 24.39 | 28.19 | e | 39.97 | a | 45.38 | b | 55.03 | 56.60 | a | 57.96 | c | 49.28 | a | 42.71 | 27.57 | 21.84 | 39.24 | ||||||
1988 | 22.80 | a | 27.21 | 29.30 | a | 37.80 | 44.90 | 51.96 | b | 57.58 | 58.40 | p | 47.86 | a | 44.40 | a | 30.72 | a | 23.83 | a | 38.03 | a | ||||
1989 | 22.13 | a | 29.89 | 34.84 | 42.75 | b | 50.29 | c | 56.37 | 60.16 | 56.52 | b | 46.55 | a | 37.62 | b | 27.17 | a | 19.52 | 40.32 | ||||||
1990 | 19.39 | 20.77 | b | 28.87 | a | 36.10 | 42.10 | a | 57.92 | d | 56.37 | d | 51.42 | 49.08 | e | 36.19 | 28.29 | b | 21.58 | 37.34 | ||||||
1991 | 22.84 | 26.11 | 26.07 | b | 32.83 | a | 40.30 | a | 45.97 | 52.82 | c | 55.17 | a | 47.55 | a | 38.73 | a | 27.97 | 24.84 | 36.77 | ||||||
1992 | 22.10 | a | 27.10 | 29.32 | 39.21 | a | 44.57 | a | 52.89 | b | 57.77 | 54.17 | b | 49.79 | b | 43.41 | b | 29.03 | 33.33 | a | 40.23 | |||||
1993 | 35.83 | a | 33.36 | 37.00 | l | 40.35 | g | 44.50 | a | 51.93 | b | 62.77 | a | 58.41 | b | 48.18 | b | 40.27 | a | 27.93 | a | 24.40 | a | 42.76 | b | |
1994 | 21.86 | c | 24.62 | b | 32.71 | c | 36.87 | 43.17 | a | 61.93 | b | 63.33 | d | 60.73 | a | 51.17 | 38.77 | 31.13 | 27.86 | b | 41.18 | |||||
1995 | 25.67 | a | 31.93 | a | 31.57 | a | 32.41 | c | 41.97 | b | 51.04 | c | 57.16 | 58.41 | b | 51.43 | 39.50 | c | 32.25 | j | 25.70 | k | 42.11 | b | ||
1996 | 24.96 | e | 32.97 | 27.89 | c | 40.45 | h | 52.29 | c | 58.21 | a | 56.61 | c | 51.50 | a | 43.04 | e | 32.67 | d | 22.59 | h | 19.11 | d | 39.92 | b | |
1997 | 21.54 | c | 19.21 | i | 33.17 | m | 36.07 | a | 49.19 | d | 55.22 | c | 60.46 | c | 58.25 | c | 54.14 | b | 39.04 | e | 31.00 | 22.48 | b | 42.74 | b | |
1998 | 24.28 | b | 26.21 | 30.08 | e | 32.00 | e | 42.92 | f | 55.97 | a | 60.55 | b | 56.25 | c | 52.72 | a | 42.12 | f | 30.60 | 24.33 | a | 39.30 | b | ||
1999 | 24.94 | 25.22 | a | 29.00 | b | 33.04 | d | 44.63 | a | 53.08 | d | 59.50 | e | 56.93 | d | 52.64 | e | 37.37 | a | 30.18 | b | 21.54 | c | 39.00 | ||
2000 | 26.40 | a | 28.26 | b | 29.56 | f | 39.07 | b | 52.17 | b | 58.96 | e | 59.69 | e | 56.65 | e | 51.77 | 41.83 | b | 25.96 | b | 23.62 | e | 42.22 | a | |
2001 | 21.50 | a | ----- | z | 29.32 | 36.25 | b | 44.52 | 56.81 | i | 60.41 | b | 56.35 | e | 51.12 | f | 43.04 | e | 32.45 | a | 20.75 | g | 40.48 | d | ||
2002 | 21.20 | a | 23.65 | e | 25.93 | b | 39.29 | b | 45.04 | e | 60.07 | b | 59.84 | 59.96 | g | 52.15 | c | 39.79 | b | 30.64 | b | 24.48 | 38.37 | a | ||
2003 | 27.14 | c | 29.54 | b | 29.40 | f | 34.61 | b | 45.80 | k | 55.10 | 60.33 | d | 60.12 | e | 53.25 | f | 45.07 | a | 31.60 | 21.90 | b | 40.60 | c | ||
2004 | ----- | z | 23.79 | 34.52 | d | 36.37 | c | 48.48 | 54.93 | b | 60.23 | a | 54.85 | d | 47.69 | d | 39.82 | c | 30.28 | a | 21.81 | d | 41.16 | a | ||
2005 | 27.57 | a | 31.21 | 32.42 | 35.14 | a | 48.10 | 54.48 | c | 62.10 | b | 57.84 | 53.16 | e | 40.31 | b | 30.04 | f | 27.52 | b | 42.71 | a | ||||
2006 | 24.03 | 26.33 | d | 29.62 | b | 39.19 | c | 50.50 | c | 56.83 | f | 59.17 | g | 58.21 | c | 49.09 | h | 39.83 | b | 30.41 | a | 22.75 | c | 35.65 | c | |
2007 | 22.79 | b | 27.38 | b | 32.11 | d | 38.14 | b | 43.43 | a | 58.48 | a | 58.83 | a | 58.87 | a | 50.15 | d | 38.92 | f | 33.33 | 23.74 | 40.66 | a | ||
2008 | 22.65 | 26.56 | b | 28.27 | a | 33.63 | 42.39 | c | 56.26 | c | 57.72 | b | 56.15 | e | 47.15 | d | 36.62 | g | 29.00 | d | 24.59 | d | 38.58 | a | ||
2009 | 23.61 | 24.77 | b | 30.90 | b | 33.38 | a | 49.55 | b | 52.07 | b | 58.14 | i | 57.60 | a | 49.15 | d | 41.64 | f | 28.86 | a | 22.70 | d | 37.26 | b | |
2010 | 22.81 | 25.48 | a | 27.81 | e | 37.13 | 41.00 | f | 55.60 | 58.59 | d | 57.75 | c | 52.04 | d | 41.48 | 25.52 | c | 26.83 | g | 40.42 | b | ||||
2011 | 21.67 | d | 21.33 | d | 32.83 | a | 38.81 | c | 42.40 | a | 53.14 | b | 57.37 | a | 60.19 | d | 52.59 | c | 39.15 | d | 27.93 | b | 20.46 | c | 38.99 | |
2012 | 26.65 | 26.46 | c | 28.32 | c | 39.89 | b | 45.23 | 58.75 | b | 58.66 | b | 57.86 | c | 51.11 | b | 42.47 | a | 31.30 | ----- | z | 42.43 | a | |||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.64 | c | 28.20 | e | 29.00 | c | 33.28 | i |
2015 | 23.81 | d | 30.44 | c | 31.72 | f | 35.44 | e | 40.50 | c | 57.14 | b | 59.67 | a | 58.95 | k | 56.85 | d | 45.57 | c | 30.76 | i | 24.46 | g | 43.68 | d |
2016 | 24.26 | 26.77 | c | 32.00 | b | 37.39 | b | 42.29 | c | 55.72 | e | 65.12 | o | 57.21 | c | 53.20 | 46.42 | 35.70 | 30.29 | 40.11 | a | |||||
2017 | 29.35 | 34.21 | 37.74 | 42.48 | a | 45.68 | 59.43 | 60.97 | 59.16 | 53.50 | 44.19 | 38.83 | 29.17 | a | 44.56 | |||||||||||
2018 | 26.10 | 33.11 | 34.52 | 43.13 | 50.65 | 63.83 | a | 63.13 | 60.13 | 53.62 | a | 43.77 | 29.03 | 27.71 | 44.06 | |||||||||||
2019 | 26.06 | 27.61 | 32.94 | 41.40 | 43.87 | 57.47 | 63.45 | 62.90 | 55.23 | 40.87 | 34.17 | 27.30 | a | 42.77 | ||||||||||||
2020 | 27.61 | 28.86 | 36.10 | 40.18 | b | 52.42 | 57.77 | 63.23 | 62.58 | 53.30 | 45.63 | a | 35.62 | a | 22.86 | b | 43.85 | |||||||||
2021 | 24.55 | 28.96 | 31.58 | 42.57 | b | 49.30 | a | 60.20 | 60.16 | 59.00 | 53.93 | a | 41.66 | b | 34.66 | a | 32.03 | 43.22 | ||||||||
2022 | 24.81 | 22.56 | a | 30.35 | 40.72 | a | 51.76 | b | 61.17 | a | 62.34 | b | 59.58 | 53.32 | b | 41.55 | b | 28.10 | a | 28.50 | c | 42.06 | ||||
2023 | 24.43 | a | 24.33 | a | 32.06 | 37.50 | b | 47.90 | 55.71 | b | 64.97 | 61.66 | b | 56.46 | b | 43.94 | 34.57 | 27.63 | a | 42.60 | ||||||
2024 | 27.65 | 30.10 | 33.56 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.43 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.11 | 26.82 | 30.35 | 36.55 | 45.15 | 54.80 | 59.61 | 57.60 | 50.95 | 40.20 | 30.19 | 24.47 | 40.22 | |||||||||||||
S.D. | 3.04 | 3.21 | 3.26 | 3.82 | 3.71 | 3.70 | 2.45 | 2.63 | 2.68 | 3.10 | 3.01 | 3.24 | 2.40 | |||||||||||||
SKEW | 0.74 | 0.21 | -0.56 | -0.79 | 0.35 | 0.10 | -0.15 | -1.13 | -0.23 | -0.31 | 0.36 | 0.42 | -0.18 | |||||||||||||
MAX | 35.83 | 34.21 | 37.74 | 43.13 | 52.42 | 63.83 | 64.97 | 62.90 | 56.85 | 46.42 | 38.83 | 33.33 | 44.56 | |||||||||||||
MIN | 17.06 | 20.04 | 20.90 | 22.46 | 38.00 | 45.97 | 52.82 | 47.48 | 43.04 | 31.81 | 23.53 | 18.71 | 34.38 | |||||||||||||
YRS | 59 | 60 | 55 | 59 | 55 | 56 | 59 | 57 | 55 | 59 | 59 | 58 | 27 |