YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 19.81 | d | 25.86 | 27.81 | 43.50 | 50.77 | 61.00 | a | 65.23 | a | 63.30 | a | 55.47 | 42.48 | 27.50 | 26.81 | d | 42.46 | ||||||||
1949 | 19.55 | 28.04 | a | 33.41 | b | 42.90 | 52.06 | 60.70 | 65.10 | 61.87 | a | 56.19 | c | 43.00 | 35.00 | 23.27 | a | 43.42 | ||||||||
1950 | 26.63 | a | 29.68 | 30.34 | b | 41.80 | 49.97 | 59.62 | a | 64.39 | c | 61.11 | c | 56.59 | a | 48.13 | 32.17 | 22.42 | e | 43.57 | ||||||
1951 | 22.97 | a | 25.89 | 33.16 | 38.90 | 51.35 | 58.87 | 67.74 | 64.97 | b | 55.07 | 45.45 | b | 29.73 | d | 27.39 | 43.46 | |||||||||
1952 | 31.06 | 27.34 | 31.80 | a | 43.77 | 50.59 | i | 64.33 | 64.71 | 66.90 | a | 57.05 | j | 36.88 | g | 28.60 | 25.65 | 42.68 | c | |||||||
1953 | 29.32 | 26.07 | 37.81 | 40.03 | 48.45 | 65.83 | 66.48 | 63.77 | 53.50 | 41.30 | k | 33.50 | 23.58 | 44.40 | a | |||||||||||
1954 | 27.58 | 31.79 | 33.45 | 45.31 | a | 52.55 | 62.30 | 67.65 | 65.52 | 60.63 | 47.39 | 34.47 | 28.10 | 46.39 | ||||||||||||
1955 | 26.19 | 22.67 | d | 32.81 | d | 41.27 | 50.32 | 58.60 | 64.23 | 64.32 | 57.60 | 44.77 | 31.53 | 29.52 | 43.65 | |||||||||||
1956 | 27.23 | 23.00 | d | 32.52 | 39.30 | 51.90 | 64.38 | a | 65.35 | 63.48 | 54.83 | 45.94 | 27.37 | c | 24.39 | 43.31 | ||||||||||
1957 | 26.35 | 35.79 | 34.48 | 39.57 | 50.58 | 60.67 | 68.48 | 65.77 | 53.17 | 47.32 | 33.43 | 30.23 | 45.49 | |||||||||||||
1958 | 22.78 | h | 31.58 | d | 31.90 | 41.20 | 53.26 | 62.53 | 64.68 | 63.35 | 56.50 | d | 41.52 | 32.40 | 23.35 | 45.66 | a | |||||||||
1959 | 23.29 | 25.61 | 30.00 | a | 41.93 | a | 53.52 | 61.10 | 63.48 | 64.13 | 54.62 | a | 40.00 | a | 30.20 | 28.29 | 43.01 | |||||||||
1960 | 23.55 | 24.62 | 31.74 | 41.37 | 48.55 | 61.60 | 62.74 | 61.58 | 54.90 | 42.71 | 33.30 | 23.26 | 42.49 | |||||||||||||
1961 | 17.94 | 26.00 | 34.42 | 38.00 | 49.48 | 58.20 | 61.26 | 61.48 | 52.17 | 41.65 | 32.27 | 23.52 | 41.36 | |||||||||||||
1962 | 19.00 | 29.19 | a | 27.71 | 40.83 | 50.16 | 57.13 | 61.97 | 60.74 | 54.80 | 44.77 | 32.33 | 25.35 | 42.00 | ||||||||||||
1963 | 15.19 | 25.86 | 30.35 | 42.10 | 50.87 | 57.17 | 63.71 | 61.74 | 55.77 | 44.61 | 32.70 | 20.00 | 41.67 | |||||||||||||
1964 | 21.52 | 21.55 | 30.10 | 37.90 | 50.23 | 59.37 | 65.52 | 63.71 | 57.77 | 44.13 | 34.23 | 27.39 | 42.78 | |||||||||||||
1965 | 27.87 | 24.82 | 27.58 | 44.03 | 51.68 | 58.70 | 65.77 | 61.58 | 55.27 | 40.94 | 38.87 | 27.32 | 43.70 | |||||||||||||
1966 | 17.39 | 23.86 | 33.13 | 42.30 | 51.35 | 60.21 | a | 67.84 | 61.74 | 56.03 | 41.29 | 35.50 | 20.87 | a | 42.63 | |||||||||||
1967 | 24.48 | 27.11 | 37.29 | 45.47 | 49.77 | 60.33 | 65.42 | 60.65 | 54.93 | 43.68 | 33.69 | a | 23.58 | 43.87 | ||||||||||||
1968 | 26.13 | 28.76 | 33.48 | 39.60 | 49.71 | 59.57 | 61.17 | a | 61.32 | 52.90 | 43.61 | 32.70 | 24.87 | 42.82 | ||||||||||||
1969 | 29.90 | a | 28.29 | 26.90 | 44.00 | 51.21 | b | 58.69 | a | 67.26 | 66.03 | 57.53 | 44.77 | 31.37 | 28.23 | 44.51 | ||||||||||
1970 | 23.00 | a | 31.79 | 30.87 | a | 40.11 | b | 52.74 | 59.03 | 65.29 | 62.84 | 55.00 | 41.10 | 32.43 | 28.47 | a | 43.56 | |||||||||
1971 | 23.72 | b | 25.71 | 32.71 | 37.66 | a | 47.63 | a | 58.14 | a | 64.23 | 60.61 | 53.67 | 43.61 | 34.20 | 26.65 | 42.38 | |||||||||
1972 | 23.65 | 25.24 | 37.07 | d | 42.10 | 51.06 | 59.30 | 62.52 | 60.94 | 55.86 | a | 45.87 | 27.74 | c | ----- | z | 44.67 | a | ||||||||
1973 | 23.00 | m | 25.96 | b | 34.42 | 34.70 | 47.20 | a | 56.60 | 61.84 | 60.19 | 51.60 | 41.10 | 31.52 | a | 22.21 | c | 42.49 | a | |||||||
1974 | 22.41 | d | 22.18 | 34.71 | 40.03 | a | 52.94 | 58.90 | 63.29 | 60.45 | 50.30 | 46.19 | 34.19 | c | 21.83 | h | 44.14 | a | ||||||||
1975 | 24.75 | c | ----- | z | 30.94 | 36.77 | 44.71 | 56.17 | 61.48 | 59.71 | 50.97 | a | 39.06 | 28.63 | 23.71 | 41.54 | a | |||||||||
1976 | 18.10 | a | 31.38 | 31.06 | 42.17 | 47.03 | 58.17 | 61.71 | 60.70 | a | 53.67 | 36.81 | 26.41 | a | 18.71 | 40.49 | ||||||||||
1977 | 17.87 | a | 25.89 | 29.97 | 42.73 | 52.39 | 60.00 | 64.67 | a | 64.03 | 56.70 | 43.52 | 31.70 | 31.06 | 43.38 | |||||||||||
1978 | 20.29 | 22.96 | 32.52 | 42.33 | 48.00 | a | 60.07 | 64.71 | 60.45 | 55.30 | 42.17 | a | 36.70 | 20.93 | a | 42.20 | ||||||||||
1979 | 19.63 | d | 25.25 | 31.61 | 40.87 | 48.10 | 55.07 | 62.79 | b | 58.23 | 52.67 | 41.32 | 27.43 | 24.77 | 40.64 | |||||||||||
1980 | 23.94 | 25.54 | a | 29.96 | f | 36.11 | b | 48.62 | b | 61.23 | 66.94 | 62.10 | 57.23 | 38.59 | b | 28.30 | 24.96 | d | 43.05 | a | ||||||
1981 | 23.90 | 25.29 | 32.74 | 43.60 | 50.71 | 59.07 | 64.43 | c | 61.10 | 52.67 | 43.29 | 33.80 | 25.13 | 42.98 | ||||||||||||
1982 | 23.97 | b | 23.61 | 33.67 | a | 41.18 | b | 49.55 | 58.33 | 64.03 | 63.70 | a | 56.50 | 41.73 | a | 32.60 | 25.03 | 42.82 | ||||||||
1983 | 23.31 | b | 27.78 | a | 33.19 | d | 36.39 | b | 44.23 | 54.90 | a | 63.35 | 63.81 | 57.04 | b | 46.55 | 35.55 | a | 18.55 | 42.05 | ||||||
1984 | 21.00 | a | 26.39 | a | 31.20 | a | 37.50 | 52.68 | 60.14 | a | 63.10 | 61.90 | 52.33 | 41.37 | a | 33.77 | 26.84 | 42.35 | ||||||||
1985 | 21.26 | d | 24.71 | 36.52 | 43.30 | 50.97 | 59.00 | 61.90 | 61.13 | 53.17 | 44.00 | 32.90 | 19.77 | 42.39 | ||||||||||||
1986 | 23.61 | 28.54 | 37.84 | 43.60 | 50.00 | 58.90 | 63.00 | 62.16 | 55.80 | 43.45 | 31.30 | 25.23 | 43.62 | |||||||||||||
1987 | 20.31 | b | 29.07 | 30.06 | 37.37 | 49.03 | 57.80 | 61.84 | 61.23 | 53.87 | 42.35 | 30.53 | 22.68 | 41.35 | ||||||||||||
1988 | 19.97 | 25.21 | 29.58 | 38.66 | a | 48.23 | 59.57 | 62.16 | 62.23 | a | 52.30 | 42.48 | 32.30 | 21.10 | 41.15 | |||||||||||
1989 | 23.87 | 24.00 | 33.00 | 40.31 | a | 52.90 | 57.28 | a | 63.19 | 61.94 | 52.73 | 40.87 | 29.83 | 16.90 | 41.40 | |||||||||||
1990 | 20.70 | a | 25.50 | 33.97 | 42.63 | 49.58 | 63.53 | 63.26 | 59.74 | 57.83 | 41.74 | 31.37 | 18.23 | a | 42.34 | |||||||||||
1991 | 22.16 | 26.93 | a | 32.77 | 41.30 | 51.39 | 59.90 | 62.65 | 61.81 | 53.90 | a | 42.00 | 30.67 | 26.45 | 42.66 | |||||||||||
1992 | 22.26 | 29.17 | 33.26 | 43.33 | 50.13 | 56.07 | 62.26 | 60.35 | 54.03 | 44.06 | 28.10 | 23.32 | 42.20 | |||||||||||||
1993 | 25.52 | 25.93 | a | 33.00 | 42.07 | 49.57 | a | 58.97 | 65.47 | a | 61.73 | a | 52.33 | 40.26 | 26.37 | 22.32 | 41.96 | |||||||||
1994 | 19.29 | 23.25 | 34.45 | 39.87 | 52.35 | 61.17 | 63.77 | 63.52 | 54.37 | 42.80 | a | 32.30 | 29.26 | 43.03 | ||||||||||||
1995 | 25.84 | 30.07 | 34.33 | a | 38.47 | 50.17 | b | 57.80 | 63.00 | 64.97 | 55.21 | a | 40.13 | 34.31 | a | 28.29 | 43.55 | |||||||||
1996 | 23.00 | 28.76 | 29.13 | a | 38.69 | a | 55.52 | 61.90 | 65.58 | 63.13 | a | 53.70 | 42.35 | 32.17 | 26.90 | 43.40 | ||||||||||
1997 | 22.00 | 27.11 | 33.55 | 37.90 | a | 51.39 | 58.23 | 63.23 | 62.63 | a | 58.00 | 43.97 | 30.73 | 19.55 | 42.36 | |||||||||||
1998 | 25.03 | 29.82 | 31.63 | a | 38.10 | a | 49.77 | a | 57.83 | 65.13 | 61.97 | 57.80 | 46.60 | a | 35.53 | 24.87 | a | 43.67 | ||||||||
1999 | 26.87 | 29.81 | b | 33.93 | a | 38.07 | a | 49.32 | 57.67 | 63.68 | 61.48 | b | 53.60 | 40.23 | 31.48 | a | 23.29 | 42.45 | ||||||||
2000 | 26.13 | 31.62 | 33.93 | b | 43.14 | a | 54.06 | 60.83 | 64.87 | 64.10 | 54.77 | 43.97 | a | 27.86 | b | 22.37 | a | 43.97 | ||||||||
2001 | 22.60 | a | 27.39 | 33.87 | 43.27 | 51.17 | a | 60.20 | 66.23 | 62.39 | 55.40 | 42.81 | 37.28 | a | 23.58 | 43.85 | ||||||||||
2002 | 24.31 | b | 23.75 | 29.68 | 44.86 | a | 50.30 | a | 63.21 | a | 65.00 | 64.48 | 55.93 | b | 43.71 | 31.27 | 27.03 | 43.63 | ||||||||
2003 | 24.52 | 27.93 | 35.34 | b | 41.30 | 50.81 | 58.54 | b | 65.65 | 64.81 | 54.14 | a | 48.40 | a | 35.83 | 25.77 | 44.42 | |||||||||
2004 | 26.13 | a | 24.75 | a | 39.58 | 42.00 | 52.58 | 58.03 | 61.71 | 59.70 | a | 54.87 | 45.26 | 32.97 | a | 25.10 | 43.56 | |||||||||
2005 | 29.06 | 32.67 | a | 32.87 | 40.23 | 50.70 | a | ----- | z | 64.29 | 62.00 | 57.50 | 45.03 | 31.03 | 20.93 | b | 42.39 | a | ||||||||
2006 | 24.93 | a | 23.62 | b | 35.29 | 44.39 | b | 54.77 | 64.00 | 66.65 | 64.84 | 52.33 | 44.10 | 33.07 | 24.94 | 44.41 | ||||||||||
2007 | 21.00 | 27.25 | 36.32 | 39.72 | a | 50.65 | 58.13 | 63.74 | 65.71 | 58.27 | 42.90 | a | 31.00 | a | 27.61 | 43.53 | ||||||||||
2008 | 20.10 | b | 27.28 | 32.87 | a | 39.10 | 49.10 | a | 61.61 | b | 64.87 | 62.94 | 54.07 | 43.13 | 31.97 | 23.47 | a | 42.54 | ||||||||
2009 | 24.03 | 28.11 | 35.58 | 39.86 | a | 52.30 | a | 62.30 | 65.32 | 63.10 | 54.61 | b | 42.29 | 31.55 | a | 22.97 | 43.50 | |||||||||
2010 | 22.42 | 26.15 | a | 33.17 | a | 42.81 | c | 49.37 | a | 63.63 | 65.84 | 63.13 | 58.83 | 45.97 | 30.07 | b | 29.30 | a | 44.22 | |||||||
2011 | 21.40 | a | 21.28 | c | 35.43 | a | 43.46 | d | 48.97 | a | 63.13 | 68.23 | 67.45 | 55.90 | 43.33 | a | 31.48 | c | 23.29 | c | 43.61 | |||||
2012 | 25.42 | e | 27.24 | d | 34.90 | b | 45.40 | 53.68 | 64.33 | 67.06 | 65.81 | 56.27 | 43.26 | ----- | z | 25.87 | a | 46.29 | a | |||||||
2013 | 24.23 | ----- | z | ----- | z | ----- | z | 51.35 | ----- | z | 65.19 | 63.32 | 58.53 | 42.45 | 32.20 | 22.81 | 45.01 | d | ||||||||
2014 | 20.61 | 27.11 | a | 29.90 | 39.43 | 50.42 | 61.97 | 64.32 | 62.29 | 57.43 | 44.77 | 28.27 | 26.23 | 42.73 | ||||||||||||
2015 | 23.39 | 26.64 | 33.61 | 40.77 | 49.16 | 61.23 | 65.00 | 63.55 | 58.90 | 48.06 | 31.27 | 26.93 | a | 44.04 | ||||||||||||
2016 | 24.35 | 27.34 | 33.52 | 40.76 | a | 47.52 | 60.23 | 66.33 | d | 66.33 | d | 56.37 | 46.29 | 36.43 | 25.45 | 44.24 | ||||||||||
2017 | 27.00 | 33.11 | 36.45 | 42.03 | 49.74 | 60.93 | 65.61 | 62.71 | 56.63 | 44.13 | 36.73 | 24.06 | 44.93 | |||||||||||||
2018 | 19.26 | 25.04 | 35.35 | 38.30 | 54.77 | 64.67 | 65.55 | 64.03 | 57.13 | 45.80 | a | 29.13 | 23.68 | 43.56 | ||||||||||||
2019 | 24.26 | 26.36 | 31.26 | 42.27 | 47.97 | 58.57 | 65.71 | 65.16 | 61.33 | 38.52 | 30.10 | 26.06 | 43.13 | |||||||||||||
2020 | 25.61 | 26.07 | 39.16 | 40.77 | 54.39 | 63.67 | 67.37 | a | 65.29 | 51.20 | 39.29 | 36.70 | 22.16 | 44.31 | ||||||||||||
2021 | 22.48 | 23.93 | 31.65 | 40.17 | 52.35 | 63.20 | 64.48 | 62.74 | 57.03 | 41.77 | 31.13 | 29.23 | 43.35 | |||||||||||||
2022 | 17.87 | 17.71 | 29.13 | 40.07 | 52.00 | 64.27 | 68.42 | 64.68 | 57.77 | 45.58 | 30.63 | 24.97 | 42.76 | |||||||||||||
2023 | 26.36 | c | 26.89 | 33.45 | 38.67 | 52.23 | 60.47 | 68.32 | 66.68 | 58.23 | 44.61 | 32.93 | 28.10 | 44.74 | ||||||||||||
2024 | 20.97 | 26.31 | 33.07 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.78 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.24 | 26.69 | 32.95 | 40.88 | 50.61 | 60.12 | 64.61 | 62.86 | 55.33 | 43.29 | 31.98 | 24.65 | 43.11 | |||||||||||||
S.D. | 3.18 | 2.99 | 2.63 | 2.39 | 2.15 | 2.43 | 1.88 | 1.95 | 2.26 | 2.40 | 2.70 | 3.03 | 1.09 | |||||||||||||
SKEW | -0.02 | 0.27 | 0.07 | -0.18 | -0.28 | 0.25 | 0.17 | 0.22 | 0.11 | -0.10 | 0.07 | -0.27 | 0.09 | |||||||||||||
MAX | 31.06 | 35.79 | 39.58 | 45.47 | 55.52 | 65.83 | 68.48 | 67.45 | 61.33 | 48.40 | 38.87 | 31.06 | 46.39 | |||||||||||||
MIN | 15.19 | 17.71 | 26.90 | 34.70 | 44.23 | 54.90 | 61.17 | 58.23 | 50.30 | 36.81 | 26.37 | 16.90 | 40.49 | |||||||||||||
YRS | 75 | 75 | 75 | 75 | 75 | 74 | 76 | 76 | 75 | 74 | 75 | 74 | 65 |