YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | 38.30 | a | 41.98 | 51.42 | a | 57.88 | 69.17 | a | 77.63 | 82.34 | 79.26 | 68.95 | 59.23 | 42.88 | 37.29 | 58.86 | ||||||||||
1941 | 37.76 | 44.69 | a | 47.81 | 49.67 | 64.81 | 70.60 | 77.22 | b | 76.16 | 66.71 | d | 54.88 | a | 45.22 | 37.44 | 56.08 | |||||||||
1942 | 34.18 | 36.09 | a | 44.60 | b | 55.34 | a | 64.03 | n | 75.30 | 81.52 | b | 76.35 | 70.42 | e | 59.77 | 49.80 | c | 40.28 | b | 56.70 | a | ||||
1943 | 39.04 | s | 45.00 | d | 49.55 | b | 61.05 | a | 67.93 | a | 73.41 | a | 80.50 | b | 77.19 | b | 73.46 | c | 61.39 | h | 46.54 | f | ----- | z | 66.01 | d |
1944 | ----- | z | ----- | z | ----- | z | 53.73 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.73 | k |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | 66.86 | i | 71.52 | f | 79.88 | j | 77.79 | e | ----- | z | ----- | z | ----- | z | ----- | z | 77.79 | k |
1946 | 33.87 | l | 40.38 | b | 48.75 | c | 61.09 | c | 64.42 | a | 77.69 | a | 79.12 | a | 76.18 | a | 71.59 | a | 55.60 | 41.87 | c | 37.05 | 59.43 | a | ||
1947 | 34.26 | 45.11 | 51.02 | 56.62 | 68.91 | c | 73.90 | a | 81.28 | d | 74.03 | a | 73.95 | 58.74 | h | 40.73 | 34.60 | a | 57.67 | a | ||||||
1948 | 36.17 | a | 38.74 | 41.88 | a | 57.84 | b | 66.48 | a | 73.79 | a | 80.29 | e | 77.02 | a | 73.55 | 59.22 | a | 41.53 | 39.05 | i | 58.77 | a | |||
1949 | 25.16 | 31.98 | 46.74 | 55.60 | i | 63.77 | a | 73.17 | 79.08 | 77.02 | c | 73.77 | b | 55.95 | c | 49.64 | b | 33.82 | c | 55.46 | a | |||||
1950 | 37.13 | d | 45.07 | a | 49.97 | b | 60.80 | b | 64.92 | a | 75.14 | a | 77.52 | 76.31 | 67.67 | 66.61 | i | 49.76 | c | 42.85 | 58.83 | a | ||||
1951 | 37.92 | 41.48 | 47.55 | 56.43 | 65.61 | 74.23 | 82.58 | 77.74 | 72.24 | m | 57.87 | a | 42.43 | a | 33.76 | d | 56.15 | a | ||||||||
1952 | 35.69 | 39.24 | 42.37 | a | 55.57 | 66.68 | 74.43 | 78.77 | 77.97 | 70.85 | c | 62.73 | 38.02 | a | 34.09 | d | 56.37 | |||||||||
1953 | 44.30 | f | 41.04 | 48.63 | 56.80 | 59.63 | 75.43 | a | 80.11 | c | 74.76 | b | 72.83 | 58.47 | 44.42 | e | 33.39 | 58.68 | a | |||||||
1954 | 35.76 | 46.65 | b | 44.98 | 60.74 | a | 67.50 | 72.31 | a | 78.47 | b | 75.15 | 70.32 | 58.92 | 47.21 | a | 33.96 | d | 57.66 | |||||||
1955 | 30.39 | 34.62 | 44.50 | b | 51.64 | a | 59.90 | a | 72.10 | 77.83 | a | 77.48 | 73.10 | 62.50 | c | 46.25 | 42.41 | b | 56.06 | |||||||
1956 | 41.56 | 34.78 | b | 49.41 | c | 53.48 | c | 66.48 | 78.60 | 78.47 | a | 76.02 | 75.69 | a | 59.27 | a | 39.26 | c | 35.58 | 57.38 | ||||||
1957 | 38.17 | a | 48.23 | 49.15 | 54.67 | 60.72 | a | 77.27 | 78.40 | a | 76.02 | 72.42 | 56.35 | 41.34 | a | 39.20 | a | 57.66 | ||||||||
1958 | 36.90 | 45.19 | b | 43.42 | 55.22 | a | 69.42 | 77.33 | a | 81.42 | 80.27 | 69.83 | a | 60.15 | 44.10 | 41.16 | 58.70 | |||||||||
1959 | 38.18 | 40.04 | 48.45 | 59.50 | b | 64.48 | 77.22 | 82.42 | 76.22 | a | 72.03 | 59.41 | b | 44.90 | 36.95 | b | 58.32 | |||||||||
1960 | 29.16 | 38.66 | 52.81 | 58.12 | 65.10 | 79.28 | 82.29 | 80.26 | 73.70 | 56.12 | a | 45.47 | 26.97 | 57.33 | ||||||||||||
1961 | 32.53 | 44.16 | 47.61 | 56.97 | 66.60 | a | 80.32 | 82.21 | 77.62 | a | 68.13 | 58.03 | 44.92 | 26.07 | a | 57.10 | ||||||||||
1962 | 27.15 | 35.96 | a | 43.77 | 62.02 | 63.73 | 74.79 | a | 80.78 | b | 79.66 | 72.86 | a | 60.42 | 49.62 | a | 37.66 | c | 57.37 | |||||||
1963 | 31.39 | 46.48 | a | 48.29 | 54.84 | b | 69.53 | b | 73.69 | d | 83.79 | 75.74 | b | 73.14 | b | 63.85 | d | 47.98 | 33.85 | 58.55 | ||||||
1964 | 34.79 | 37.67 | 44.48 | 54.13 | 64.93 | a | 73.69 | a | 82.57 | a | 77.28 | a | 70.11 | b | 64.10 | 41.75 | d | 37.93 | b | 56.95 | ||||||
1965 | 39.53 | a | 40.74 | c | 45.17 | b | 54.62 | a | 61.42 | 69.08 | f | 78.05 | 78.56 | e | 67.89 | b | 62.77 | c | 50.98 | b | 37.47 | a | 56.11 | a | ||
1966 | 31.73 | g | 37.20 | a | 51.53 | a | 61.43 | a | 69.40 | 75.48 | c | 81.50 | d | 80.65 | 72.96 | d | 58.81 | b | 49.68 | 37.63 | 61.48 | a | ||||
1967 | 35.58 | a | 42.89 | a | 52.10 | b | ----- | z | 62.73 | 67.71 | a | 75.79 | e | 69.00 | d | 66.28 | 63.45 | 51.67 | 28.28 | a | 55.95 | a | ||||
1968 | 21.16 | 45.97 | 50.39 | 54.27 | 64.26 | 74.85 | 76.41 | b | 69.04 | c | 72.05 | 62.90 | g | 47.12 | a | 31.22 | b | 55.16 | a | |||||||
1969 | 41.68 | a | 38.41 | 45.81 | 59.42 | 68.34 | 76.78 | 81.76 | b | 80.90 | a | 71.67 | 56.02 | 47.05 | 41.56 | 59.12 | ||||||||||
1970 | 39.56 | 46.12 | 45.61 | 48.73 | 67.66 | 75.03 | 81.29 | 79.34 | 69.32 | 55.35 | 48.14 | a | 36.91 | b | 57.76 | |||||||||||
1971 | 37.19 | 42.48 | 50.71 | 55.80 | 60.95 | 75.78 | 84.32 | 78.16 | 70.02 | 54.39 | 43.88 | 33.76 | 57.29 | |||||||||||||
1972 | 39.29 | 45.31 | 57.32 | 58.82 | 66.56 | 74.03 | 82.44 | 78.03 | 70.54 | c | 56.68 | 42.08 | 34.32 | c | 58.79 | |||||||||||
1973 | 32.50 | a | 40.61 | 42.74 | 52.68 | b | 66.24 | 74.71 | a | 79.98 | a | 77.19 | d | 70.09 | a | 60.32 | 47.37 | 39.31 | 56.98 | |||||||
1974 | 33.95 | b | 39.71 | 53.63 | 55.53 | 69.11 | 81.72 | a | 79.27 | a | 78.73 | 71.93 | b | 59.48 | b | 45.62 | d | 34.57 | b | 58.60 | ||||||
1975 | 33.93 | a | 40.68 | 45.39 | 50.12 | 61.97 | 74.67 | 80.16 | 78.84 | 70.48 | 58.77 | 45.13 | 35.88 | a | 56.34 | |||||||||||
1976 | 37.39 | 44.83 | 47.05 | 55.58 | 66.71 | 75.03 | 80.81 | 77.00 | 68.22 | 57.52 | 46.97 | 35.65 | 57.73 | |||||||||||||
1977 | 31.42 | 44.46 | 45.66 | 57.95 | 61.56 | 77.12 | 80.18 | 79.25 | a | 73.35 | 61.92 | 49.15 | 44.53 | a | 58.88 | |||||||||||
1978 | 39.94 | 42.87 | a | 52.63 | 57.00 | 64.47 | 78.13 | 81.92 | 78.69 | 70.48 | 63.71 | 46.33 | 30.90 | 58.92 | ||||||||||||
1979 | 31.50 | 40.57 | 49.12 | a | 57.95 | 64.65 | a | 75.44 | d | 82.38 | a | 77.19 | d | 75.83 | a | 63.50 | a | 43.07 | a | 36.62 | b | 58.15 | ||||
1980 | 40.08 | a | 44.10 | 46.74 | 55.50 | a | 60.92 | 76.62 | b | 81.94 | d | 78.47 | 72.00 | 57.79 | 46.68 | 42.30 | a | 58.60 | ||||||||
1981 | 40.45 | c | 43.67 | a | 47.80 | d | 60.55 | 65.56 | 80.03 | a | 80.92 | 77.38 | b | 69.85 | 56.69 | 49.00 | 40.39 | 59.36 | ||||||||
1982 | 34.63 | d | 40.40 | c | 48.54 | d | 56.54 | b | 64.52 | b | 73.79 | a | 78.91 | b | 76.36 | i | 69.02 | a | 55.27 | e | 44.12 | a | 37.48 | a | 54.84 | a |
1983 | 36.92 | 43.69 | a | 49.14 | b | 49.35 | d | 64.33 | a | 72.74 | a | 78.41 | c | 76.38 | a | 72.95 | a | 59.16 | 48.45 | b | 42.40 | a | 57.83 | |||
1984 | 36.41 | b | 41.23 | c | 49.65 | a | 54.54 | c | 72.97 | a | 74.04 | b | 78.42 | 76.22 | b | 71.75 | b | 53.72 | a | 45.92 | 35.57 | b | 57.54 | |||
1985 | 35.76 | b | 39.77 | 48.76 | d | 61.13 | c | 66.26 | b | 77.72 | 81.30 | a | 79.57 | b | 66.46 | b | 59.15 | a | 45.45 | b | 37.67 | a | 58.25 | |||
1986 | 41.92 | a | 46.80 | c | 53.87 | d | 57.85 | d | 67.35 | d | 76.31 | a | 77.97 | a | 78.58 | 66.97 | 56.00 | a | 46.58 | 35.28 | a | 58.79 | ||||
1987 | 32.45 | a | 41.11 | a | 45.60 | 59.07 | b | 64.16 | 76.77 | 77.34 | b | 75.84 | 71.00 | a | 62.35 | a | 44.24 | a | 32.05 | b | 56.83 | |||||
1988 | 34.92 | 43.57 | a | 49.03 | b | 56.73 | 65.29 | b | 75.53 | 81.74 | 76.15 | 69.08 | 64.50 | 47.68 | 37.52 | a | 58.48 | |||||||||
1989 | 34.47 | a | 40.10 | b | 55.69 | b | 64.60 | 68.77 | 75.72 | 82.64 | b | 77.13 | a | 71.52 | b | 59.15 | a | 49.71 | a | 37.79 | c | 59.77 | ||||
1990 | 36.04 | c | 41.22 | a | 51.68 | a | 59.52 | 65.50 | 78.15 | 80.52 | 76.19 | b | 71.41 | c | 58.61 | d | 45.39 | c | 29.59 | c | 57.82 | |||||
1991 | 33.48 | 44.25 | 44.08 | 55.42 | 62.12 | g | 71.29 | b | 80.28 | d | 78.14 | b | 71.40 | a | 62.97 | a | 43.80 | 29.75 | a | 55.90 | a | |||||
1992 | 30.55 | 43.09 | b | 48.81 | 61.53 | 65.26 | 73.17 | a | 78.34 | 75.47 | a | 71.38 | a | 61.44 | d | 40.41 | b | 25.14 | c | 56.22 | ||||||
1993 | 37.95 | 42.30 | a | 50.77 | 58.00 | a | 66.12 | a | 74.07 | b | 80.06 | 76.85 | 71.32 | 58.07 | b | 40.77 | b | 34.67 | a | 57.58 | ||||||
1994 | 37.21 | 39.16 | 51.05 | 56.28 | a | 64.57 | a | 79.80 | 81.97 | 80.79 | b | 71.98 | b | 57.27 | 42.23 | 37.67 | a | 58.33 | ||||||||
1995 | 37.80 | a | 48.46 | a | 50.13 | 54.33 | a | 62.06 | 72.00 | 80.63 | a | 81.18 | a | 73.03 | 60.18 | 51.07 | 38.90 | 59.15 | ||||||||
1996 | 39.48 | 47.86 | a | 49.68 | 58.70 | 70.94 | 79.59 | a | 83.45 | 80.97 | 68.38 | a | 57.57 | b | 46.22 | 39.36 | b | 60.18 | ||||||||
1997 | 37.03 | a | 40.93 | 53.55 | b | 54.23 | 69.48 | 74.05 | 79.48 | 77.06 | 72.47 | 57.52 | 47.53 | 33.45 | 58.07 | |||||||||||
1998 | 39.00 | 39.93 | 47.47 | 50.73 | b | 63.28 | a | 72.38 | 81.53 | 80.04 | c | 70.27 | 57.24 | 45.92 | 36.95 | b | 57.06 | |||||||||
1999 | 41.07 | a | 44.29 | 52.84 | 51.66 | a | 64.40 | 74.63 | 77.92 | a | 75.55 | a | 68.19 | a | 60.78 | a | 48.63 | 36.06 | 58.00 | |||||||
2000 | 40.87 | 44.88 | 47.19 | b | 61.29 | b | 70.87 | a | 79.20 | 81.90 | 78.83 | a | 72.77 | 58.65 | 39.29 | a | 38.98 | b | 59.56 | |||||||
2001 | 35.46 | c | 42.14 | 50.22 | b | 56.47 | 70.50 | a | 78.95 | 79.30 | a | 78.19 | b | 74.95 | 62.13 | a | 49.25 | 35.24 | d | 59.40 | ||||||
2002 | 36.37 | 40.76 | a | 46.27 | 61.16 | b | 67.84 | b | 80.10 | 83.82 | 80.20 | d | 70.29 | b | 56.88 | a | 45.40 | e | 33.22 | a | 58.53 | |||||
2003 | 41.55 | a | 41.71 | b | 48.79 | 53.90 | a | 69.10 | 77.05 | b | 85.58 | a | 78.86 | b | 72.80 | 63.97 | b | 43.18 | b | 35.93 | b | 59.37 | ||||
2004 | 35.75 | a | 38.63 | b | 55.77 | a | 56.12 | 67.97 | 77.03 | 80.48 | 77.34 | 69.85 | 56.78 | a | 44.03 | 35.11 | c | 57.91 | ||||||||
2005 | 41.81 | g | 44.11 | j | 48.00 | e | 55.82 | 60.94 | w | 77.62 | r | 83.10 | b | 76.42 | e | 70.74 | c | 59.79 | 47.68 | b | 37.47 | b | 59.88 | d | ||
2006 | 37.97 | a | 42.44 | b | 44.81 | 57.34 | a | 70.48 | a | 80.45 | 81.71 | 76.40 | 66.98 | 56.19 | 47.13 | 36.36 | b | 58.19 | ||||||||
2007 | 32.26 | d | 43.45 | 52.70 | a | 59.79 | a | 67.53 | a | 79.33 | a | 83.47 | 79.40 | 72.97 | a | 58.53 | 50.22 | 32.68 | a | 59.36 | ||||||
2008 | 32.35 | a | 41.79 | 49.34 | 55.68 | 62.11 | 77.72 | 80.92 | 79.73 | a | 71.43 | 59.03 | 48.17 | 36.70 | a | 57.91 | ||||||||||
2009 | 39.10 | 42.46 | 50.18 | 55.07 | 70.15 | 72.17 | 81.63 | 79.42 | 70.18 | 56.48 | b | 46.98 | 32.85 | a | 58.06 | |||||||||||
2010 | 33.28 | a | 39.82 | 46.76 | 54.45 | 62.05 | 75.63 | 79.98 | 75.87 | a | 73.38 | 59.98 | a | 44.55 | 41.87 | a | 57.30 | |||||||||
2011 | 33.16 | 37.16 | 50.37 | 57.12 | a | 61.27 | a | 75.27 | 79.60 | b | 80.65 | 71.22 | 58.13 | 44.87 | 33.98 | a | 56.90 | |||||||||
2012 | 39.58 | 41.38 | 49.63 | 59.82 | 69.03 | 79.97 | 79.53 | 79.98 | 71.28 | 61.53 | 47.85 | 37.23 | a | 59.73 | ||||||||||||
2013 | 31.16 | 38.40 | b | 51.61 | 58.17 | a | 65.58 | 80.73 | 79.47 | 74.97 | 69.26 | a | 54.23 | t | 44.90 | 32.82 | a | 57.01 | a | |||||||
2014 | 39.71 | 47.12 | 51.02 | 56.85 | 63.17 | d | 77.90 | f | 81.10 | 75.94 | 73.08 | 62.27 | 47.80 | 39.00 | a | 57.91 | a | |||||||||
2015 | 38.60 | a | 47.79 | 53.40 | 56.17 | 62.10 | 77.98 | a | 77.00 | 78.92 | 72.77 | 61.45 | 43.65 | 35.67 | a | 58.79 | ||||||||||
2016 | 36.47 | a | 45.36 | 53.39 | 56.92 | 62.66 | 81.10 | 81.60 | 74.53 | 69.72 | 62.16 | b | 48.23 | 38.05 | b | 59.18 | ||||||||||
2017 | 38.29 | 47.07 | 54.08 | 56.88 | d | 63.79 | b | 80.65 | 81.33 | a | 77.47 | a | 70.27 | b | 60.31 | 51.86 | a | 40.27 | e | 60.19 | ||||||
2018 | 40.70 | d | 43.45 | 49.00 | a | 61.53 | 67.73 | c | 79.78 | c | 82.43 | b | 79.41 | c | 73.58 | 55.79 | 44.60 | 37.86 | m | 61.64 | a | |||||
2019 | 41.33 | y | 37.30 | 50.12 | c | 59.62 | a | 58.71 | b | 73.57 | c | 81.65 | a | 82.02 | 72.90 | 56.63 | a | 46.47 | a | 35.38 | a | 59.49 | a | |||
2020 | 39.09 | d | 41.96 | a | 48.89 | 58.12 | 69.98 | 76.98 | a | 81.45 | 83.74 | 73.73 | 63.18 | 48.35 | 34.12 | a | 59.97 | |||||||||
2021 | 35.23 | a | 43.71 | 45.85 | a | 58.76 | a | 67.33 | b | 80.83 | a | 83.19 | d | 79.00 | b | 73.43 | 55.15 | 49.93 | 38.73 | a | 59.26 | |||||
2022 | 36.29 | 38.30 | 47.63 | 58.70 | 68.97 | 77.67 | 81.39 | 77.11 | 74.18 | 57.87 | 41.48 | a | 36.93 | b | 58.04 | |||||||||||
2023 | 35.41 | c | 37.80 | 45.05 | 56.07 | 65.52 | 71.25 | 85.10 | 78.19 | 70.81 | a | 60.50 | 47.22 | 38.13 | 57.59 | |||||||||||
2024 | 38.73 | a | 44.03 | 49.14 | c | 56.70 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.97 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.00 | 41.96 | 48.87 | 56.82 | 65.73 | 76.07 | 80.68 | 77.69 | 71.22 | 59.15 | 45.88 | 36.10 | 58.16 | |||||||||||||
S.D. | 3.87 | 3.42 | 3.24 | 3.16 | 3.09 | 2.89 | 2.01 | 2.33 | 2.15 | 2.71 | 3.11 | 3.76 | 1.04 | |||||||||||||
SKEW | -1.11 | -0.31 | 0.12 | -0.29 | -0.08 | -0.11 | -0.12 | -0.89 | -0.33 | 0.19 | -0.31 | -0.51 | -0.07 | |||||||||||||
MAX | 41.92 | 48.46 | 57.32 | 64.60 | 72.97 | 81.72 | 85.58 | 83.74 | 75.83 | 64.50 | 51.86 | 44.53 | 60.19 | |||||||||||||
MIN | 21.16 | 31.98 | 41.88 | 48.73 | 58.71 | 67.71 | 75.79 | 69.00 | 66.28 | 53.72 | 38.02 | 25.14 | 56.06 | |||||||||||||
YRS | 77 | 82 | 83 | 81 | 79 | 79 | 82 | 82 | 81 | 77 | 81 | 79 | 62 |