YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.39 | q | 55.32 | 55.55 | 40.73 | 32.69 | i | 26.98 | 44.65 | h | ||||
1952 | 25.29 | 29.62 | 29.83 | a | 40.95 | 44.52 | 47.82 | 58.34 | 58.02 | 57.48 | 54.56 | 34.43 | 30.40 | 42.61 | ||||||||||||
1953 | 35.13 | 32.98 | f | 33.05 | 36.17 | 40.15 | 43.83 | 56.73 | a | 55.87 | 55.32 | 46.02 | 39.07 | 33.32 | 43.15 | a | ||||||||||
1954 | 28.53 | a | 37.63 | e | 31.10 | a | 36.70 | 45.29 | b | 45.05 | 53.26 | 51.40 | 50.72 | a | 43.04 | c | 40.85 | 31.17 | b | 41.23 | ||||||
1955 | 29.22 | b | 28.52 | c | 26.32 | 32.45 | 41.68 | a | 49.58 | 51.77 | 56.87 | a | 51.70 | 45.03 | 28.02 | e | 27.30 | f | 40.11 | a | ||||||
1956 | 28.10 | 25.34 | a | 29.98 | b | 38.58 | 47.23 | 47.35 | 59.48 | 56.58 | a | 53.64 | e | 41.78 | a | 37.76 | c | 35.71 | c | 41.80 | ||||||
1957 | 22.82 | 31.57 | 35.11 | 37.98 | 47.58 | 52.22 | 53.85 | a | 52.40 | 56.67 | 43.11 | 36.43 | 34.63 | 42.03 | ||||||||||||
1958 | 34.97 | b | 37.27 | b | 34.20 | d | 37.80 | 52.31 | 53.92 | 62.03 | a | 60.29 | 50.48 | 48.13 | a | 35.05 | 38.03 | a | 45.37 | |||||||
1959 | 30.58 | 28.86 | 33.02 | 38.70 | 41.32 | 50.90 | 59.03 | 55.52 | 49.05 | 46.18 | a | 37.87 | 33.08 | 42.01 | ||||||||||||
1960 | 26.47 | 29.66 | a | 35.03 | 38.53 | 41.17 | a | 51.60 | 59.76 | 53.76 | 53.90 | 46.68 | 34.09 | c | 32.95 | a | 41.97 | |||||||||
1961 | 34.66 | 33.54 | a | 33.63 | 38.52 | a | 42.90 | 56.37 | 58.75 | a | 61.65 | 47.40 | 42.87 | a | 33.66 | a | 29.42 | a | 42.78 | |||||||
1962 | 29.82 | 32.93 | 31.48 | 42.27 | 38.45 | 49.40 | a | 55.34 | 54.69 | 54.95 | a | 45.83 | a | 37.82 | 34.82 | a | 42.32 | |||||||||
1963 | 26.89 | 40.35 | a | 33.69 | b | 34.47 | 44.15 | a | 47.33 | 51.43 | c | 56.85 | 57.85 | 45.31 | 35.47 | 35.03 | a | 42.40 | ||||||||
1964 | 29.08 | a | 32.00 | a | 30.37 | 33.67 | 39.37 | 45.78 | a | ----- | z | 52.82 | 49.32 | 46.63 | 33.45 | 28.98 | a | 38.32 | a | |||||||
1965 | 32.39 | 32.89 | 35.11 | 39.42 | 41.87 | 48.85 | 57.81 | 57.06 | 48.70 | 50.79 | 39.23 | 31.16 | 42.94 | |||||||||||||
1966 | 30.60 | 30.12 | 33.69 | 40.23 | 45.40 | 47.71 | a | 54.47 | b | 55.31 | 53.08 | 45.13 | a | 37.58 | 32.45 | a | 42.15 | |||||||||
1967 | 31.60 | 33.93 | 31.27 | 33.68 | 44.33 | a | 52.28 | 58.23 | 63.31 | 58.42 | 44.31 | 37.28 | a | 29.63 | 43.19 | |||||||||||
1968 | 28.83 | b | 36.29 | a | 37.24 | 36.00 | 44.12 | b | 49.95 | 59.10 | 53.98 | 51.86 | a | 41.14 | b | 35.50 | a | 26.45 | 41.70 | |||||||
1969 | 22.85 | 28.27 | 35.23 | 37.82 | 49.20 | c | 55.02 | a | 56.00 | b | 55.24 | 51.91 | b | 40.21 | 39.02 | 32.85 | 41.97 | |||||||||
1970 | 29.15 | 34.80 | 32.58 | 33.03 | a | 43.63 | a | 54.47 | 57.27 | 57.42 | 46.92 | 41.45 | 34.68 | 27.40 | 41.07 | |||||||||||
1971 | 28.55 | 31.29 | 28.79 | 34.92 | 43.45 | a | 45.76 | a | 59.76 | 61.18 | 48.22 | 40.78 | a | 33.78 | 27.21 | 40.31 | ||||||||||
1972 | 25.48 | 32.19 | 35.69 | 33.45 | 46.16 | 50.80 | 60.31 | 60.52 | a | 47.59 | a | 43.66 | 35.11 | c | 25.16 | 41.34 | ||||||||||
1973 | 25.47 | b | 33.10 | b | 32.73 | 38.35 | 46.95 | 50.18 | 58.48 | a | 54.76 | 52.45 | 43.02 | 30.97 | 33.00 | 41.62 | ||||||||||
1974 | 24.77 | 30.93 | 32.24 | 35.70 | 39.69 | 51.72 | 55.27 | 59.16 | 57.74 | a | 47.15 | 36.67 | 31.60 | 41.89 | ||||||||||||
1975 | 30.55 | a | 29.18 | 30.85 | 31.96 | b | 43.40 | a | 47.98 | 58.31 | 52.41 | b | 56.00 | b | 41.47 | 33.33 | 33.11 | 40.71 | ||||||||
1976 | 33.05 | 30.91 | 30.57 | a | 35.83 | a | 44.02 | 46.00 | a | 56.53 | 53.82 | a | 53.89 | c | 46.95 | a | 40.31 | a | 35.80 | a | 42.31 | |||||
1977 | 31.52 | a | 36.19 | a | 30.48 | b | 41.59 | a | 38.66 | 53.12 | 55.04 | d | 62.65 | a | 48.61 | b | 44.53 | 32.90 | a | 31.95 | 42.27 | |||||
1978 | 31.63 | a | 33.83 | a | 38.57 | a | 37.81 | c | 41.29 | 53.90 | 57.72 | a | 55.89 | 47.92 | 46.39 | 31.02 | 24.61 | 41.71 | ||||||||
1979 | 19.53 | a | 28.50 | 36.97 | b | 36.41 | a | 45.83 | a | 52.39 | b | 58.97 | 55.72 | a | 55.91 | a | 46.45 | a | 33.74 | a | 33.61 | 42.00 | ||||
1980 | 25.44 | 32.11 | a | 31.65 | a | 40.17 | a | 44.10 | b | 46.07 | c | 57.66 | 53.39 | 52.02 | 47.55 | c | 37.54 | c | 36.39 | 42.01 | ||||||
1981 | 34.16 | c | 32.46 | b | 35.73 | a | 38.04 | b | 42.22 | b | 47.29 | b | 55.45 | a | 60.80 | c | 52.68 | 42.21 | 38.24 | a | 30.18 | a | 42.46 | |||
1982 | 28.24 | d | 27.79 | b | 32.64 | b | 36.87 | d | 42.78 | b | 53.63 | g | 56.40 | a | 57.38 | b | 49.32 | e | 42.41 | h | 32.15 | j | 28.96 | c | 40.04 | c |
1983 | 33.34 | f | 34.29 | b | 36.59 | c | 37.90 | a | 47.43 | a | 48.76 | a | 52.71 | c | 57.15 | 49.83 | d | 44.77 | c | 34.86 | b | 25.00 | h | 44.43 | b | |
1984 | 32.67 | e | 34.44 | d | 36.26 | d | 34.86 | a | 41.15 | a | 47.05 | 57.78 | b | 57.60 | b | 49.31 | f | 38.38 | c | 32.78 | e | 26.75 | e | 39.97 | a | |
1985 | 28.82 | c | 27.91 | e | 32.13 | d | 39.19 | d | 42.80 | f | 50.77 | d | 62.53 | a | 55.41 | b | 46.62 | a | 42.00 | 24.78 | c | 32.47 | b | 40.24 | a | |
1986 | 34.68 | 31.45 | 39.61 | 36.52 | a | 44.58 | 55.69 | a | 51.41 | b | 62.17 | a | 46.63 | 49.05 | b | 36.04 | e | 31.89 | 43.31 | |||||||
1987 | 29.98 | 34.45 | 34.82 | a | 43.36 | a | 47.34 | 54.17 | 53.89 | 57.71 | 56.19 | a | 52.29 | b | 37.55 | 27.42 | a | 44.10 | ||||||||
1988 | 28.85 | a | 35.00 | 34.23 | 39.13 | 41.97 | 49.03 | 56.40 | b | 57.26 | 53.17 | a | 53.72 | a | 34.20 | 32.47 | a | 42.95 | ||||||||
1989 | 30.23 | a | 22.39 | 33.23 | 42.62 | a | 42.68 | a | 52.64 | a | 52.76 | 53.95 | 55.24 | a | 43.30 | a | 38.79 | a | 37.65 | a | 42.12 | |||||
1990 | 30.85 | 28.96 | 36.84 | 42.81 | a | 41.67 | b | 49.92 | 60.00 | 58.90 | a | 57.25 | 41.77 | 35.93 | 23.08 | a | 42.33 | |||||||||
1991 | 29.92 | 39.66 | 32.31 | b | 35.80 | 39.73 | 45.20 | 58.43 | c | 59.54 | c | 57.08 | 46.47 | a | 36.07 | b | 32.87 | 42.76 | ||||||||
1992 | 33.69 | 37.86 | 42.16 | 41.60 | a | 51.10 | a | 55.50 | 57.85 | a | 59.88 | a | 50.57 | 47.76 | b | 34.48 | b | 27.08 | a | 44.96 | ||||||
1993 | 24.34 | 27.20 | 37.08 | 37.12 | 47.68 | c | 48.04 | b | 48.82 | a | 56.15 | a | 56.16 | a | 48.55 | 32.42 | 33.03 | a | 41.38 | |||||||
1994 | 36.39 | 30.36 | 38.02 | 40.35 | 46.53 | 48.83 | 59.15 | 56.81 | 57.68 | 42.42 | 28.60 | 29.81 | 42.91 | |||||||||||||
1995 | 31.34 | 38.35 | a | 34.27 | 36.83 | 46.78 | a | 49.23 | 57.63 | a | 53.80 | a | 56.38 | a | 42.29 | b | 40.46 | b | 29.79 | 43.10 | ||||||
1996 | 31.24 | 30.71 | 35.57 | a | 39.43 | 40.48 | 49.68 | 61.16 | 59.63 | 50.43 | a | 43.29 | b | 37.09 | a | 29.91 | c | 42.39 | ||||||||
1997 | 29.10 | 31.04 | a | 32.86 | f | 36.33 | a | 47.62 | a | 48.98 | b | 55.78 | a | 59.88 | a | 53.66 | a | 42.38 | b | 38.05 | 31.53 | a | 43.12 | a | ||
1998 | 31.52 | a | 32.78 | a | 35.23 | 38.25 | b | 42.02 | a | 49.95 | a | 61.21 | b | 61.05 | b | 57.38 | a | 43.55 | b | 35.45 | b | 26.98 | b | 42.95 | ||
1999 | 31.89 | 29.04 | 32.10 | a | 34.84 | a | 38.86 | b | 47.38 | d | 55.75 | c | 59.30 | d | 54.65 | c | 46.98 | b | 39.47 | 33.38 | b | 41.97 | ||||
2000 | 28.37 | 32.88 | a | 31.95 | a | 41.90 | a | 43.39 | 53.24 | a | 54.88 | a | 55.95 | a | 52.29 | b | 43.32 | a | 31.18 | 30.41 | c | 41.65 | ||||
2001 | 32.10 | 29.68 | 35.58 | a | 35.16 | a | 46.18 | a | 47.54 | b | 55.73 | a | 58.66 | b | 55.76 | a | 44.12 | b | 37.58 | 29.14 | b | 42.27 | ||||
2002 | 29.37 | a | 31.87 | a | 29.80 | c | 36.96 | b | 41.45 | b | 52.57 | b | 59.33 | a | 56.24 | b | 54.35 | 43.95 | a | 39.22 | a | 31.69 | 42.23 | |||
2003 | 35.45 | 31.86 | 34.27 | 35.40 | 41.79 | b | 53.56 | c | 60.33 | a | 60.79 | 56.08 | 47.79 | b | 31.00 | c | 30.82 | a | 43.26 | |||||||
2004 | 29.93 | b | 31.95 | a | 38.15 | a | 41.52 | 44.34 | 51.75 | 59.94 | 60.02 | a | 50.14 | a | 45.31 | 37.20 | 33.83 | a | 43.67 | |||||||
2005 | 32.53 | 34.34 | 37.92 | 37.60 | 46.37 | 46.82 | b | 58.39 | 59.45 | b | 50.53 | a | 44.90 | a | 34.55 | 30.16 | 42.80 | |||||||||
2006 | 32.95 | 28.68 | 30.97 | 38.42 | 46.57 | a | 52.93 | a | 59.97 | 56.66 | b | 54.42 | 44.10 | 33.48 | 31.22 | a | 42.53 | |||||||||
2007 | 29.15 | a | 33.59 | 37.24 | 36.97 | 44.64 | b | 48.71 | a | 60.36 | b | 56.00 | 50.30 | 41.03 | 36.60 | 28.52 | 41.93 | |||||||||
2008 | 26.65 | a | 32.76 | 30.73 | 32.30 | 41.78 | a | 47.69 | a | 57.40 | 57.94 | 53.18 | 43.79 | 40.12 | 27.34 | 40.97 | ||||||||||
2009 | 31.63 | 32.09 | 29.11 | 36.12 | 44.90 | 51.19 | a | 61.24 | 58.50 | 55.80 | 40.08 | 34.65 | 26.60 | 41.83 | ||||||||||||
2010 | 34.56 | 34.71 | 34.90 | 35.08 | 39.19 | 46.68 | 57.69 | 57.79 | 52.28 | 45.66 | 32.95 | 29.90 | 41.79 | |||||||||||||
2011 | 31.77 | 26.88 | 31.27 | 32.07 | b | 37.69 | 46.02 | 52.29 | 58.61 | 57.00 | 44.37 | 32.23 | 31.63 | 40.15 | ||||||||||||
2012 | 30.98 | a | 30.21 | 30.74 | 38.32 | 42.58 | 46.23 | f | 56.18 | 60.60 | 56.35 | 45.19 | 36.41 | a | 28.35 | 41.45 | a | |||||||||
2013 | 30.63 | 30.14 | 32.65 | 37.63 | 45.32 | 51.38 | 59.71 | 58.95 | 53.20 | 43.65 | 35.40 | 29.29 | 42.33 | |||||||||||||
2014 | 36.52 | 26.82 | 35.03 | 38.33 | 46.00 | 48.47 | 61.35 | 61.08 | 56.05 | 48.68 | 34.37 | 31.89 | 43.72 | |||||||||||||
2015 | 36.84 | 38.23 | 41.92 | 38.23 | 47.26 | 58.08 | 60.52 | 60.47 | 50.98 | 50.00 | 34.12 | 30.24 | 45.57 | |||||||||||||
2016 | 31.40 | 36.45 | 34.82 | 44.02 | 46.61 | 51.83 | 55.21 | 59.15 | 50.37 | 42.15 | 40.25 | 25.13 | 43.12 | |||||||||||||
2017 | 26.18 | 29.43 | 33.60 | 35.59 | a | 45.53 | 52.28 | 59.31 | 65.55 | 56.45 | 42.97 | 35.38 | 30.48 | 42.73 | ||||||||||||
2018 | 32.71 | 29.04 | 32.95 | 38.25 | 49.10 | 50.10 | 62.53 | 60.05 | 51.00 | 46.31 | 37.30 | 29.94 | 43.27 | |||||||||||||
2019 | 33.69 | 23.43 | 32.58 | 39.03 | 47.40 | a | 50.90 | 56.73 | 59.69 | 50.38 | 39.39 | 38.38 | 32.74 | 42.03 | ||||||||||||
2020 | 32.13 | 31.41 | 33.00 | 40.27 | 45.79 | 49.00 | 57.71 | 58.21 | 58.67 | 46.73 | 35.63 | 32.63 | 43.43 | |||||||||||||
2021 | 33.13 | 27.80 | 33.40 | 40.57 | 44.84 | 57.88 | 62.21 | 59.29 | 53.50 | 41.94 | 38.48 | 30.00 | n | 44.82 | a | |||||||||||
2022 | 35.53 | 32.57 | 36.23 | 33.03 | 39.19 | 49.80 | 62.15 | 63.95 | 57.98 | 52.79 | 31.28 | 28.53 | 43.59 | |||||||||||||
2023 | 30.87 | 28.82 | 29.26 | 35.67 | 48.63 | 52.48 | 60.00 | 61.95 | 51.78 | 47.03 | 37.32 | 36.52 | 43.36 | |||||||||||||
2024 | 30.02 | 32.00 | 34.58 | 34.64 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.20 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.36 | 31.74 | 33.78 | 37.55 | 44.05 | 50.23 | 57.56 | 57.86 | 53.13 | 44.91 | 35.53 | 30.85 | 42.45 | |||||||||||||
S.D. | 3.48 | 3.56 | 3.00 | 2.84 | 3.16 | 3.16 | 3.00 | 2.95 | 3.33 | 3.31 | 3.11 | 3.16 | 1.04 | |||||||||||||
SKEW | -0.54 | 0.09 | 0.38 | 0.09 | 0.10 | 0.35 | -0.57 | 0.07 | -0.21 | 0.74 | -0.76 | -0.04 | 0.68 | |||||||||||||
MAX | 36.84 | 40.35 | 42.16 | 44.02 | 52.31 | 58.08 | 62.53 | 65.55 | 58.67 | 54.56 | 40.85 | 38.03 | 45.57 | |||||||||||||
MIN | 19.53 | 22.39 | 26.32 | 31.96 | 37.69 | 43.83 | 48.82 | 51.40 | 46.62 | 38.38 | 24.78 | 23.08 | 40.15 | |||||||||||||
YRS | 72 | 72 | 72 | 72 | 71 | 70 | 71 | 73 | 72 | 72 | 71 | 70 | 62 |