YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | 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 | 59.38 | d | 60.65 | 65.15 | 65.22 | 53.34 | 45.45 | 39.74 | 55.56 | e | ||||||
1964 | 40.23 | 41.15 | b | 42.95 | 47.64 | a | 50.53 | 58.42 | 65.58 | a | 63.68 | a | 59.55 | 54.76 | b | 41.10 | a | 39.43 | b | 50.42 | ||||||
1965 | 38.87 | e | 42.74 | a | 47.00 | b | 51.13 | 52.18 | a | 59.22 | 66.24 | 65.82 | a | 60.57 | a | 55.24 | 47.09 | a | 36.48 | a | 51.88 | |||||
1966 | 38.52 | 40.52 | 44.13 | a | 51.12 | 55.21 | 60.29 | a | 64.21 | 66.79 | 62.74 | a | 52.44 | 45.69 | a | 42.38 | a | 52.00 | ||||||||
1967 | 41.92 | a | 42.78 | a | 42.66 | 45.38 | 54.58 | 62.50 | 68.31 | 71.39 | 66.45 | 53.11 | 46.55 | 39.22 | a | 52.90 | ||||||||||
1968 | 39.42 | 46.43 | 48.78 | a | 47.78 | 52.85 | 59.47 | a | 64.89 | 62.74 | 60.23 | 51.00 | 45.52 | 38.25 | a | 51.45 | ||||||||||
1969 | 34.48 | a | 38.19 | a | 46.03 | a | 48.80 | b | 57.66 | 62.97 | 63.03 | 63.39 | 61.03 | 49.94 | 45.05 | a | 41.93 | b | 51.04 | |||||||
1970 | 40.67 | b | 44.09 | 45.62 | a | 45.80 | b | 54.31 | 63.08 | 64.90 | 64.31 | 57.95 | 50.84 | b | 44.50 | a | 37.48 | 51.13 | ||||||||
1971 | 37.21 | c | 39.75 | 40.87 | 46.40 | 53.23 | a | 55.85 | 64.45 | 66.50 | 57.67 | 49.19 | 42.55 | 38.10 | 49.31 | |||||||||||
1972 | 37.42 | 41.81 | 47.12 | a | 44.18 | 56.00 | 59.93 | 67.71 | 67.84 | 58.72 | 51.62 | a | 44.86 | a | 35.10 | a | 51.03 | |||||||||
1973 | 36.31 | b | 43.59 | a | 43.90 | 49.32 | 55.50 | a | 61.17 | a | 63.97 | 61.05 | 60.22 | 50.53 | 41.28 | 42.32 | 50.76 | |||||||||
1974 | 35.50 | 39.39 | 44.11 | 47.02 | g | 51.44 | 60.62 | 63.29 | 66.21 | 65.40 | 53.62 | b | 45.12 | 42.20 | a | 51.54 | a | |||||||||
1975 | 42.35 | a | 40.57 | a | 42.37 | 44.70 | 54.47 | 58.45 | 64.56 | 62.17 | a | 63.37 | 51.07 | a | 43.09 | a | 41.48 | b | 50.72 | |||||||
1976 | 39.92 | a | 40.45 | 42.03 | 46.48 | 53.77 | 56.52 | 63.68 | 62.87 | a | 62.40 | 53.42 | 45.95 | a | 37.39 | 50.41 | ||||||||||
1977 | 37.34 | 44.20 | a | 42.92 | 49.98 | a | 50.21 | b | 60.63 | 62.71 | 67.98 | 58.30 | 52.94 | 43.18 | 42.18 | 51.05 | ||||||||||
1978 | 40.97 | 44.34 | 48.18 | a | 48.78 | a | 52.62 | b | 62.02 | 64.83 | b | 64.79 | b | 58.38 | 54.55 | 40.02 | 35.16 | 51.22 | ||||||||
1979 | 30.85 | 40.30 | a | 47.66 | 48.97 | a | 56.15 | a | 60.87 | 65.48 | a | 63.73 | 62.43 | 56.18 | 42.65 | c | 42.37 | a | 51.47 | |||||||
1980 | 35.70 | a | 42.60 | 44.18 | 50.27 | 53.26 | 56.27 | 64.48 | 61.74 | 60.82 | 53.47 | 44.27 | b | 41.15 | a | 50.68 | ||||||||||
1981 | 40.68 | 41.80 | 45.40 | 48.82 | 52.94 | 57.70 | 63.68 | a | 67.06 | 60.72 | 50.73 | 45.05 | a | 42.15 | 51.39 | |||||||||||
1982 | 36.50 | 40.28 | a | 43.92 | a | 45.07 | 54.47 | 61.21 | a | 62.71 | 64.25 | a | 59.82 | b | 51.17 | b | 39.93 | 38.52 | a | 49.82 | ||||||
1983 | 40.85 | 43.46 | 46.43 | a | 48.12 | 55.45 | 56.84 | a | 61.27 | 64.55 | 57.97 | 51.52 | a | 45.75 | 34.92 | 50.60 | ||||||||||
1984 | 40.39 | 42.59 | a | 47.82 | 47.13 | 52.15 | 56.97 | 64.74 | 63.40 | a | 58.67 | 48.95 | 42.58 | 35.60 | 50.08 | |||||||||||
1985 | 34.25 | a | 38.32 | 42.00 | 50.45 | 53.34 | 60.80 | 67.97 | 63.35 | 56.34 | a | 50.90 | a | 36.52 | 31.58 | 48.82 | ||||||||||
1986 | 40.53 | 42.34 | 47.97 | 46.96 | b | 53.02 | 61.92 | 60.05 | 66.32 | 56.09 | a | 51.39 | 44.87 | 36.77 | 50.69 | |||||||||||
1987 | 37.42 | 42.16 | 44.40 | a | 50.15 | 55.80 | a | 61.21 | a | 62.10 | a | 64.98 | 60.72 | 55.52 | 44.93 | b | 36.80 | a | 51.35 | |||||||
1988 | 37.03 | 41.62 | 44.21 | 49.18 | 51.43 | a | 57.66 | a | 64.05 | a | 63.65 | 59.74 | a | 55.50 | b | 44.81 | a | 38.13 | 50.58 | |||||||
1989 | 39.15 | 33.18 | 42.71 | c | 52.71 | a | 53.78 | a | 60.79 | a | 61.31 | 62.15 | 62.83 | a | 50.45 | 44.84 | a | 37.74 | 50.14 | |||||||
1990 | 40.77 | a | 37.89 | 45.62 | b | 51.28 | c | 52.85 | a | 58.68 | 66.88 | a | 65.95 | 62.65 | 49.37 | 44.00 | a | 31.21 | b | 50.60 | ||||||
1991 | 36.90 | b | 46.39 | 41.79 | 47.28 | 50.58 | 55.30 | 65.39 | 65.07 | a | 63.05 | 52.84 | 44.77 | 39.15 | 50.71 | |||||||||||
1992 | 41.28 | a | 45.48 | a | 48.73 | a | 51.78 | a | 59.70 | a | 62.21 | a | 65.50 | 65.52 | 58.55 | 51.97 | 43.46 | d | 38.03 | 52.68 | ||||||
1993 | 35.11 | 38.54 | 46.73 | a | 48.73 | 57.37 | 58.90 | a | 60.60 | 64.55 | 61.17 | 53.65 | 37.97 | a | 37.42 | 50.06 | ||||||||||
1994 | 41.29 | 39.11 | 46.11 | 49.38 | 55.68 | 57.37 | 65.84 | 63.53 | 63.22 | a | 50.46 | e | 39.73 | 40.40 | 51.01 | |||||||||||
1995 | 42.30 | a | 45.84 | 44.94 | 48.02 | a | 56.77 | 60.17 | 66.48 | 63.08 | a | 63.15 | 50.85 | 48.77 | 40.66 | 52.59 | ||||||||||
1996 | 40.74 | 40.36 | 45.39 | 50.13 | 51.30 | a | 58.40 | 67.53 | 65.82 | 58.07 | 49.97 | 43.35 | 40.05 | 50.93 | ||||||||||||
1997 | 39.15 | a | 40.73 | 43.88 | b | 47.47 | 58.27 | 58.23 | 63.87 | a | 66.19 | 61.13 | 49.97 | 46.12 | a | 37.83 | a | 51.07 | ||||||||
1998 | 42.18 | a | 42.93 | a | 46.40 | a | 48.52 | 53.52 | 60.23 | 67.42 | 66.34 | 63.30 | 51.13 | 45.29 | a | 38.37 | 52.14 | |||||||||
1999 | 41.10 | a | 41.20 | a | 43.08 | 48.38 | 51.92 | 57.98 | 63.26 | 65.39 | 61.67 | a | 52.47 | 47.33 | a | 40.68 | 51.21 | |||||||||
2000 | 38.00 | 42.03 | 43.03 | 50.88 | 54.43 | a | 61.83 | 63.77 | a | 64.27 | a | 60.50 | 52.15 | 39.73 | b | 39.05 | a | 50.81 | ||||||||
2001 | 39.29 | 40.71 | 45.77 | a | 46.83 | 56.44 | 57.41 | a | 62.85 | 64.06 | 61.22 | 51.82 | 46.38 | 40.19 | 51.08 | |||||||||||
2002 | 40.39 | 42.41 | 42.45 | 49.72 | 53.11 | 60.18 | 66.55 | ----- | z | 62.90 | 52.50 | 45.17 | 41.70 | a | 50.64 | a | ||||||||||
2003 | 44.08 | 42.62 | 47.79 | 48.10 | 55.11 | 63.77 | 68.58 | 67.10 | 63.62 | 55.73 | 41.87 | 41.06 | 53.29 | |||||||||||||
2004 | 39.03 | 42.64 | 49.48 | 52.00 | a | 56.53 | 61.25 | b | 68.65 | 68.16 | 60.55 | 53.94 | 43.52 | 41.82 | 53.13 | |||||||||||
2005 | 41.02 | 41.45 | 48.97 | 50.03 | 57.15 | 59.00 | a | 67.66 | 68.15 | 60.72 | 53.26 | 41.70 | 37.76 | 52.24 | ||||||||||||
2006 | 42.61 | 40.25 | 43.48 | 50.20 | c | 56.85 | 62.98 | 68.63 | a | 66.10 | 62.72 | 52.45 | 44.02 | 38.29 | 52.38 | |||||||||||
2007 | 36.35 | a | 42.68 | 47.81 | 48.58 | 55.53 | 59.57 | a | 68.08 | a | 66.00 | 60.78 | 50.27 | 42.73 | 39.18 | a | 51.46 | |||||||||
2008 | 35.26 | 41.20 | a | 42.61 | 45.45 | a | 55.76 | 57.78 | 65.98 | 65.26 | 60.85 | 50.18 | 45.10 | 34.77 | 50.02 | |||||||||||
2009 | 36.31 | 38.39 | 40.15 | a | 46.70 | 54.06 | 59.23 | 66.06 | 63.52 | 59.75 | 47.97 | 40.38 | a | 31.23 | 48.65 | |||||||||||
2010 | 40.16 | 40.64 | 46.06 | 48.33 | 53.03 | 58.89 | b | 65.56 | 65.02 | 61.25 | 53.56 | 43.87 | 41.65 | 51.50 | ||||||||||||
2011 | 40.35 | 39.68 | 44.21 | 45.72 | 51.55 | 58.37 | 63.18 | 67.02 | a | 65.13 | 53.11 | 41.82 | 36.35 | 50.54 | ||||||||||||
2012 | 38.84 | 41.10 | 41.34 | 49.54 | e | 53.98 | 56.94 | f | 63.48 | 66.90 | 62.97 | 53.40 | 45.03 | a | 39.47 | 50.55 | a | |||||||||
2013 | 33.97 | 39.87 | a | 45.48 | 49.78 | 55.76 | 60.90 | 66.68 | 65.02 | 60.42 | 49.13 | 41.50 | 32.05 | 50.05 | ||||||||||||
2014 | 37.03 | 38.11 | 45.95 | 48.83 | 56.35 | 59.13 | 67.16 | 68.06 | 63.40 | 55.34 | 42.00 | 40.32 | 51.81 | |||||||||||||
2015 | 39.10 | 44.95 | 48.32 | 47.33 | 55.60 | 63.87 | 66.97 | 66.65 | 59.02 | 54.65 | 39.73 | 38.18 | 52.03 | |||||||||||||
2016 | 37.66 | 42.59 | 43.85 | 51.83 | 55.42 | 59.33 | 62.31 | 65.35 | 58.03 | 48.92 | 44.50 | 31.77 | 50.13 | |||||||||||||
2017 | 29.89 | 37.52 | 42.39 | 44.98 | 53.73 | 58.02 | 63.08 | 66.83 | a | 60.37 | 48.39 | 40.08 | 33.17 | y | 49.57 | a | ||||||||||
2018 | 44.00 | j | 41.48 | 43.23 | 49.40 | 57.60 | 59.87 | 66.89 | 64.35 | 58.22 | g | 52.48 | 43.46 | q | 40.19 | 52.83 | c | |||||||||
2019 | 37.31 | 34.09 | 42.10 | 50.10 | 56.98 | 60.55 | 62.47 | 65.55 | 56.85 | 44.91 | c | ----- | z | ----- | z | 51.09 | b | |||||||||
2020 | ----- | z | ----- | z | ----- | z | ----- | z | 52.97 | 56.87 | 71.59 | t | 69.44 | 65.22 | 54.48 | 43.88 | 41.16 | 54.86 | e | |||||||
2021 | 41.92 | 41.50 | 44.84 | 53.37 | 57.74 | 68.20 | e | 70.02 | 70.02 | 64.63 | 51.60 | 46.80 | 39.71 | 54.19 | ||||||||||||
2022 | 39.44 | 40.89 | 47.76 | 46.72 | 52.89 | 58.45 | i | 68.90 | a | 71.26 | 65.97 | 58.32 | 39.30 | 38.05 | 51.77 | a | ||||||||||
2023 | 40.21 | 38.52 | 41.02 | 47.70 | 60.66 | 63.20 | 70.05 | 72.69 | 62.62 | 53.47 | 43.73 | 43.56 | 53.12 | |||||||||||||
2024 | 39.44 | 43.84 | 44.89 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.72 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.69 | 41.27 | 44.85 | 48.59 | 54.56 | 59.84 | 65.12 | 65.60 | 61.16 | 52.10 | 43.51 | 38.57 | 51.16 | |||||||||||||
S.D. | 2.82 | 2.56 | 2.35 | 2.10 | 2.27 | 2.34 | 2.42 | 2.35 | 2.46 | 2.34 | 2.50 | 3.03 | 1.11 | |||||||||||||
SKEW | -0.84 | -0.55 | 0.12 | -0.03 | 0.28 | 0.70 | 0.01 | 0.77 | 0.08 | -0.13 | -0.57 | -0.81 | 0.33 | |||||||||||||
MAX | 44.08 | 46.43 | 49.48 | 53.37 | 60.66 | 68.20 | 70.05 | 72.69 | 66.45 | 58.32 | 48.77 | 43.56 | 54.19 | |||||||||||||
MIN | 29.89 | 33.18 | 40.15 | 44.18 | 50.21 | 55.30 | 60.05 | 61.05 | 56.09 | 44.91 | 36.52 | 31.21 | 48.65 | |||||||||||||
YRS | 59 | 60 | 60 | 58 | 60 | 59 | 60 | 60 | 60 | 61 | 59 | 59 | 52 |