YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.94 | n | 37.92 | e | 37.92 | k |
1938 | 35.10 | a | 35.11 | 37.39 | 44.97 | a | 48.65 | 53.25 | f | 58.97 | 54.17 | a | 55.77 | 48.33 | a | 38.33 | 36.48 | d | 44.84 | a | ||||||
1939 | 37.71 | 32.70 | a | 38.52 | 44.73 | 49.29 | 51.63 | 57.71 | 58.29 | 53.80 | 48.23 | 39.43 | 39.03 | 45.92 | ||||||||||||
1940 | 32.68 | 37.90 | 41.10 | 45.80 | 50.00 | 55.13 | 58.42 | 58.39 | 56.33 | 50.43 | c | 36.97 | 35.23 | a | 46.53 | |||||||||||
1941 | 34.42 | 37.71 | 42.20 | a | 45.13 | 49.43 | a | 53.67 | 59.87 | 58.42 | 52.73 | 48.13 | 40.93 | 37.45 | 46.68 | |||||||||||
1942 | 26.90 | a | 35.39 | 37.32 | 45.03 | 47.97 | 52.17 | 60.10 | 59.87 | 54.57 | 48.17 | a | 38.43 | 35.74 | 45.14 | |||||||||||
1943 | 26.00 | 34.64 | 36.29 | 44.37 | 45.65 | 51.00 | 56.61 | 55.29 | 55.13 | 48.06 | 39.63 | 33.10 | 43.81 | |||||||||||||
1944 | 31.00 | a | 33.31 | 35.10 | 42.47 | 46.58 | 51.13 | 56.68 | 56.61 | 53.27 | 50.58 | 39.73 | 32.84 | 44.11 | ||||||||||||
1945 | 36.10 | 35.64 | 36.61 | 41.47 | 49.16 | 51.03 | 56.52 | 56.52 | 50.57 | 45.55 | 38.50 | 32.94 | 44.22 | |||||||||||||
1946 | 34.65 | 35.25 | 38.35 | 41.50 | 49.13 | 51.03 | 57.48 | 56.35 | 53.00 | 43.26 | 34.60 | 35.68 | 44.19 | |||||||||||||
1947 | 30.00 | 35.54 | 39.90 | 43.07 | 49.39 | 51.43 | 55.74 | 54.77 | 52.50 | 47.81 | 40.17 | 36.35 | 44.72 | |||||||||||||
1948 | 32.74 | 30.59 | 36.45 | 40.97 | 47.00 | 55.33 | 55.16 | 56.39 | 50.70 | 45.26 | 37.97 | 29.87 | 43.20 | |||||||||||||
1949 | 18.29 | 31.32 | 37.35 | 42.90 | 48.61 | 50.40 | 54.35 | 55.42 | 53.37 | 40.13 | 42.60 | 35.16 | 42.49 | |||||||||||||
1950 | 19.20 | a | 32.29 | d | 35.81 | 39.87 | 43.84 | 52.67 | 54.19 | 57.00 | 51.50 | 45.19 | 38.97 | 37.87 | 42.37 | |||||||||||
1951 | 32.00 | 32.32 | 32.55 | 42.07 | 46.10 | 49.20 | 57.52 | 53.26 | 53.33 | 47.23 | 38.83 | 32.71 | 43.09 | |||||||||||||
1952 | 28.10 | 33.17 | 36.32 | 41.50 | 46.45 | 51.23 | 56.90 | 57.03 | 53.37 | 50.84 | 35.00 | 34.32 | 43.69 | |||||||||||||
1953 | 40.81 | 36.71 | 38.52 | 41.53 | 45.94 | 50.43 | 57.13 | a | 56.13 | 53.27 | 46.87 | 42.93 | 37.90 | 45.68 | ||||||||||||
1954 | 31.42 | 34.96 | 34.29 | 41.37 | 47.32 | 50.70 | 53.97 | 56.10 | 53.23 | 44.45 | 44.47 | 33.00 | 43.77 | |||||||||||||
1955 | 33.52 | 33.14 | 33.19 | 37.87 | 44.19 | 51.70 | 53.23 | 54.40 | a | 51.45 | a | 47.19 | 33.73 | 31.84 | 42.12 | |||||||||||
1956 | 32.94 | 27.69 | 36.61 | 42.61 | b | 49.29 | 51.17 | 57.68 | 57.07 | a | 52.33 | 45.13 | 37.13 | 35.55 | 43.77 | |||||||||||
1957 | 21.42 | 31.79 | 37.42 | 42.93 | 50.65 | 53.97 | 54.68 | 54.52 | 55.83 | 45.48 | 36.47 | 35.87 | 43.42 | |||||||||||||
1958 | 36.06 | 41.14 | 36.00 | 42.33 | 49.81 | 57.33 | 59.94 | 58.84 | 52.69 | a | 47.29 | 39.07 | 36.69 | b | 46.43 | |||||||||||
1959 | 33.03 | 34.82 | 37.55 | 43.03 | 45.68 | 53.53 | 56.77 | 54.68 | 52.03 | 45.81 | 35.60 | 34.77 | 43.94 | |||||||||||||
1960 | 27.45 | 35.17 | 35.52 | 41.17 | 45.93 | d | 51.93 | 56.84 | 55.29 | 51.97 | 46.84 | 39.33 | 32.52 | 43.33 | ||||||||||||
1961 | 35.65 | 39.43 | 38.58 | 41.73 | 47.45 | 54.70 | 58.55 | 59.94 | 50.87 | 45.03 | 34.57 | b | 34.23 | 45.06 | ||||||||||||
1962 | 32.29 | 35.11 | a | 35.74 | 43.41 | a | 45.33 | a | 51.67 | 55.55 | 56.61 | 54.80 | 47.45 | 41.93 | a | 37.26 | 44.76 | |||||||||
1963 | 28.39 | 36.54 | 37.23 | a | 40.43 | 47.61 | 52.90 | 54.87 | 57.26 | 56.90 | 48.77 | 42.03 | 33.65 | 44.72 | ||||||||||||
1964 | 36.19 | 34.38 | 36.63 | a | 39.07 | 45.29 | 51.63 | 56.52 | 55.42 | 51.63 | 47.40 | a | 38.27 | 31.13 | 43.63 | |||||||||||
1965 | 35.23 | 36.96 | 36.35 | 42.80 | 45.26 | 48.67 | 56.58 | 56.15 | k | 48.10 | 48.58 | 43.90 | 33.00 | 43.22 | a | |||||||||||
1966 | 33.30 | d | 34.00 | 35.06 | 43.00 | 43.31 | b | 51.37 | 55.39 | 55.13 | 53.63 | 45.35 | 41.37 | 37.35 | 44.02 | |||||||||||
1967 | 39.52 | 37.07 | 37.40 | a | 39.93 | b | 45.87 | 54.97 | 58.26 | 59.39 | 56.24 | a | 47.81 | 40.77 | 34.06 | 45.94 | ||||||||||
1968 | 32.52 | 38.48 | 40.55 | 40.00 | 46.84 | 51.60 | 56.13 | a | 53.68 | 52.97 | 44.00 | 39.93 | 31.23 | 43.99 | ||||||||||||
1969 | 23.90 | 33.46 | 36.06 | 41.23 | 47.29 | 55.67 | 54.48 | 52.45 | 52.00 | 43.90 | 40.60 | 36.00 | 43.09 | |||||||||||||
1970 | 32.10 | 38.00 | 36.68 | 38.27 | 44.10 | 52.50 | 55.26 | 53.71 | 49.34 | a | 43.77 | 38.80 | 33.03 | 42.96 | ||||||||||||
1971 | 33.84 | 36.18 | 33.23 | 39.20 | 45.48 | 48.77 | 54.55 | 56.43 | a | 49.40 | 41.48 | 38.00 | 33.06 | 42.47 | ||||||||||||
1972 | 32.06 | 33.52 | 38.68 | 37.03 | 46.61 | 50.73 | 55.13 | 54.94 | 48.10 | 42.13 | a | 40.50 | 27.43 | a | 42.24 | |||||||||||
1973 | 30.13 | a | 35.50 | 37.17 | a | 40.87 | 46.35 | 51.60 | 54.29 | 53.74 | 51.50 | 46.06 | 37.60 | 38.55 | 43.61 | |||||||||||
1974 | 29.61 | 36.93 | 37.32 | 42.50 | 45.13 | 51.53 | 54.77 | 55.77 | 53.20 | 44.84 | 40.00 | 37.26 | 44.07 | |||||||||||||
1975 | 32.71 | 32.36 | 34.87 | 36.43 | 45.68 | 50.87 | 57.23 | 54.26 | 54.57 | 48.10 | 39.63 | 37.00 | 43.64 | |||||||||||||
1976 | 36.03 | a | 34.86 | a | 35.74 | 40.40 | 46.48 | 49.21 | a | 55.57 | a | 55.32 | 54.33 | 46.23 | 42.53 | 36.35 | 44.42 | |||||||||
1977 | 29.10 | 37.39 | 37.97 | b | 41.67 | 44.52 | 53.57 | 55.82 | c | 59.97 | 51.50 | 47.06 | 37.86 | b | 38.26 | 44.56 | ||||||||||
1978 | 34.50 | a | 38.64 | 39.83 | a | 42.03 | 46.45 | 54.53 | 57.34 | b | 57.50 | a | 53.37 | 47.42 | 34.86 | a | 32.10 | a | 44.88 | |||||||
1979 | 21.45 | 32.74 | a | 39.31 | b | 43.60 | 48.74 | 52.63 | 57.77 | 57.00 | c | 54.50 | 49.10 | 38.77 | 37.74 | 44.45 | ||||||||||
1980 | 27.78 | d | 34.93 | b | 38.45 | 43.97 | 48.16 | 51.83 | 58.00 | 55.52 | 53.00 | 46.55 | 42.87 | 37.94 | 44.92 | |||||||||||
1981 | 39.03 | 36.07 | 40.90 | 43.33 | 48.06 | 52.03 | 56.26 | 58.87 | 51.97 | 45.52 | 42.50 | 37.16 | 45.98 | |||||||||||||
1982 | 34.61 | 35.70 | a | 37.55 | 39.21 | a | 46.00 | 55.10 | 56.06 | 57.10 | 53.10 | a | 46.42 | 37.73 | 36.13 | a | 44.56 | |||||||||
1983 | 37.97 | b | 39.32 | 42.71 | 42.31 | a | 49.03 | a | 53.03 | a | 56.58 | 57.70 | a | 50.92 | d | 45.64 | c | 43.17 | 28.76 | b | 45.60 | |||||
1984 | 33.81 | 36.79 | 41.39 | 41.87 | 45.52 | 51.17 | 55.94 | 55.10 | 51.13 | 44.19 | 39.78 | c | 32.74 | 44.12 | ||||||||||||
1985 | 31.03 | a | 31.19 | b | 35.25 | c | 43.00 | c | 47.93 | d | 52.54 | f | 59.17 | b | 55.26 | d | 50.13 | g | 45.28 | f | 30.73 | d | 26.10 | b | 39.96 | c |
1986 | 35.46 | g | 36.46 | b | 41.79 | b | 41.62 | f | 47.64 | f | 55.14 | b | 55.17 | b | 58.22 | d | 51.96 | b | 48.97 | 42.55 | a | 35.15 | d | 47.27 | c | |
1987 | 33.07 | d | 39.36 | c | 41.35 | h | 44.38 | f | 49.88 | e | 53.45 | a | 57.43 | c | 55.46 | e | 54.59 | c | 49.24 | b | 44.90 | a | 35.48 | b | 47.29 | b |
1988 | 32.79 | c | 36.46 | a | 39.21 | c | 43.96 | f | 47.70 | d | 52.67 | 56.83 | a | 56.84 | 53.79 | a | 52.47 | a | 42.69 | a | 36.72 | b | 46.20 | a | ||
1989 | 37.39 | 27.43 | 37.80 | a | 44.62 | a | 47.53 | a | 53.82 | b | 56.30 | a | 57.77 | 53.03 | 47.81 | 44.14 | a | 36.55 | 45.35 | |||||||
1990 | 38.50 | a | 34.68 | 39.42 | 45.00 | a | 47.70 | a | 53.48 | a | 58.23 | 59.71 | 56.63 | 46.30 | a | 42.64 | b | 29.23 | 45.96 | |||||||
1991 | 31.61 | 40.44 | a | 37.10 | a | 42.50 | 46.67 | a | 49.96 | c | 57.53 | a | 58.71 | 55.70 | 47.53 | a | 41.77 | 38.00 | a | 45.63 | ||||||
1992 | 38.10 | a | 41.31 | 42.70 | a | 45.55 | a | 51.10 | a | 56.57 | 59.68 | 58.60 | a | 53.30 | 49.84 | 41.63 | 34.58 | 47.75 | ||||||||
1993 | 28.45 | 31.79 | 36.58 | 43.70 | 50.70 | a | 53.17 | 56.06 | 57.23 | a | 54.60 | 51.03 | 34.93 | 36.60 | a | 44.57 | ||||||||||
1994 | 39.10 | a | 33.54 | 39.74 | 45.85 | d | 50.03 | a | 52.04 | c | 59.29 | 59.68 | 56.62 | a | 47.96 | d | 37.24 | a | 36.70 | a | 46.48 | |||||
1995 | 35.45 | 38.22 | a | 39.52 | 44.00 | c | 51.15 | d | 52.71 | b | 59.43 | a | 55.42 | 57.90 | 47.69 | b | 46.03 | 35.87 | 46.95 | |||||||
1996 | 34.61 | 30.75 | a | 37.48 | 44.00 | a | 45.79 | b | 50.55 | a | 57.74 | 54.12 | e | 50.00 | 46.65 | 40.33 | 33.65 | 43.81 | ||||||||
1997 | 33.28 | b | 35.85 | b | ----- | z | 41.75 | b | 49.19 | 52.40 | 57.84 | f | 58.64 | c | 54.83 | 46.17 | a | 41.97 | a | 35.84 | 44.99 | b | ||||
1998 | 35.77 | a | 38.68 | 40.19 | 42.13 | 49.43 | a | 53.61 | b | 59.57 | a | 57.07 | a | 53.69 | a | 46.03 | b | 43.34 | a | 35.24 | b | 46.23 | ||||
1999 | 37.94 | 36.61 | 38.00 | 39.10 | 43.71 | 51.63 | 54.41 | b | 58.33 | a | 50.92 | d | 45.39 | 43.43 | 38.47 | a | 44.83 | |||||||||
2000 | 34.00 | a | 36.14 | a | 36.26 | 42.63 | 47.21 | c | 52.07 | a | 55.37 | a | 55.54 | c | 53.41 | c | 46.10 | a | 35.11 | c | 33.52 | 43.95 | ||||
2001 | 34.50 | a | 33.50 | 38.59 | d | 39.41 | a | 45.68 | 49.62 | a | 55.17 | a | 56.45 | 52.26 | c | 44.48 | 41.53 | 35.87 | a | 43.92 | ||||||
2002 | 35.73 | a | 35.57 | 35.68 | 42.14 | a | 45.55 | b | 52.24 | a | 56.71 | 54.27 | a | 51.20 | 44.58 | 39.90 | 35.58 | 44.10 | ||||||||
2003 | 38.48 | 35.04 | 40.35 | 41.37 | 46.35 | 53.53 | 56.10 | 56.45 | 53.73 | 48.84 | 37.11 | b | 36.06 | 45.29 | ||||||||||||
2004 | 31.03 | a | 37.41 | b | 41.07 | c | 44.10 | 49.16 | 54.10 | 58.82 | c | 59.76 | b | 51.75 | b | 47.96 | e | 40.70 | 38.68 | c | 46.21 | |||||
2005 | 34.13 | 33.89 | 39.97 | b | 43.43 | 50.61 | 52.71 | b | 57.89 | d | 56.97 | a | 48.35 | d | 48.19 | e | 38.96 | b | 32.57 | a | 44.81 | |||||
2006 | 40.32 | c | 33.44 | a | 37.73 | a | 42.85 | c | 47.76 | b | 55.89 | c | 57.29 | c | 55.52 | d | 51.56 | c | 45.29 | c | 40.33 | 33.64 | c | 45.14 | ||
2007 | 31.77 | a | 37.20 | c | 39.80 | f | 41.83 | a | 46.63 | a | 53.67 | c | 60.79 | g | 56.28 | b | 51.17 | 44.68 | c | 36.59 | c | 34.06 | 43.39 | b | ||
2008 | 31.63 | a | 35.39 | a | 35.69 | b | 37.31 | d | 46.90 | b | 50.40 | j | 56.39 | 57.45 | 52.33 | c | 44.57 | c | 42.87 | 30.89 | c | 42.86 | a | |||
2009 | 32.29 | 33.11 | 35.65 | 39.57 | 45.13 | 55.03 | 57.07 | a | 58.61 | 54.37 | 44.48 | 40.20 | 29.58 | 43.76 | ||||||||||||
2010 | 37.32 | 38.19 | a | 38.65 | 41.30 | 44.21 | c | 50.66 | a | 55.68 | 57.35 | 53.73 | 47.68 | 38.63 | 35.23 | 44.89 | ||||||||||
2011 | 34.71 | 32.93 | 37.68 | 39.53 | 44.03 | 51.57 | 54.84 | 58.03 | 54.57 | 48.58 | 37.63 | 33.16 | 43.94 | |||||||||||||
2012 | 32.52 | 35.59 | 36.26 | 42.87 | 46.19 | 50.40 | 56.65 | 58.90 | 53.30 | 47.42 | 42.37 | 36.26 | 44.89 | |||||||||||||
2013 | 31.48 | 36.11 | 37.77 | 42.30 | 47.55 | 52.70 | 57.39 | 59.58 | 55.87 | 43.26 | 39.23 | 30.77 | 44.50 | |||||||||||||
2014 | 34.58 | 32.68 | 37.65 | 42.70 | 48.90 | 51.93 | 58.90 | 59.48 | 55.37 | 50.55 | 39.07 | 37.42 | 45.77 | |||||||||||||
2015 | 36.65 | 40.75 | 40.81 | 41.87 | 49.45 | 56.47 | 61.06 | 59.52 | 50.50 | 50.71 | 38.93 | 35.35 | 46.84 | |||||||||||||
2016 | 34.77 | 40.00 | 40.61 | 46.67 | 49.45 | 52.43 | 56.97 | 57.03 | 51.03 | 48.42 | 45.17 | 31.26 | 46.15 | |||||||||||||
2017 | 25.94 | 33.70 | e | 38.90 | 42.03 | 48.16 | 53.43 | 55.97 | 58.52 | 54.90 | 44.71 | 39.43 | 33.10 | 44.07 | ||||||||||||
2018 | 37.74 | 35.64 | 36.81 | 41.53 | 50.58 | 52.03 | 58.52 | 58.71 | 51.27 | 47.35 | 40.47 | 36.77 | 45.62 | |||||||||||||
2019 | 35.84 | 29.61 | 33.55 | 43.60 | 48.77 | 50.30 | 55.03 | 58.19 | 54.63 | 42.06 | 38.67 | 35.61 | 43.82 | |||||||||||||
2020 | 37.87 | 35.97 | 36.23 | 42.17 | 47.94 | 52.67 | 56.13 | 57.10 | 55.60 | 46.23 | 39.40 | 35.71 | 45.25 | |||||||||||||
2021 | 37.23 | 35.38 | g | 36.16 | 40.27 | 47.97 | 56.70 | 58.87 | 58.32 | 51.63 | 45.42 | 42.87 | 34.87 | 46.39 | a | |||||||||||
2022 | 31.97 | 34.00 | 39.29 | 38.33 | 45.19 | 52.76 | a | 58.13 | 59.61 | 55.57 | 50.26 | 35.30 | 29.48 | 44.16 | ||||||||||||
2023 | 35.42 | 32.79 | 35.35 | 39.97 | 50.52 | 52.37 | 58.77 | 60.55 | 53.43 | 47.77 | 39.77 | 38.58 | 45.44 | |||||||||||||
2024 | 30.77 | 35.72 | 38.54 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.01 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.01 | 35.23 | 37.69 | 41.98 | 47.35 | 52.49 | 56.83 | 56.90 | 53.05 | 46.73 | 39.71 | 34.72 | 44.61 | |||||||||||||
S.D. | 4.49 | 2.78 | 2.20 | 2.11 | 1.97 | 1.87 | 1.67 | 1.89 | 2.05 | 2.30 | 2.89 | 2.75 | 1.21 | |||||||||||||
SKEW | -1.08 | -0.19 | 0.18 | -0.33 | 0.03 | 0.43 | 0.23 | -0.11 | -0.13 | -0.16 | -0.33 | -0.80 | 0.20 | |||||||||||||
MAX | 40.81 | 41.31 | 42.71 | 46.67 | 51.15 | 57.33 | 61.06 | 60.55 | 57.90 | 52.47 | 46.03 | 39.03 | 47.75 | |||||||||||||
MIN | 18.29 | 27.43 | 32.55 | 36.43 | 43.31 | 48.67 | 53.23 | 52.45 | 48.10 | 40.13 | 30.73 | 26.10 | 42.12 | |||||||||||||
YRS | 86 | 86 | 84 | 83 | 85 | 83 | 84 | 85 | 85 | 85 | 86 | 87 | 76 |