YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | 54.62 | i | 68.16 | 74.27 | 84.10 | 69.71 | 64.80 | 51.52 | b | 37.40 | 32.13 | 60.26 | d | |||||||
1938 | 30.74 | 30.79 | ----- | z | 52.00 | o | 64.61 | 78.67 | 87.55 | 80.23 | 81.20 | 61.00 | 41.50 | 38.97 | 59.52 | b | ||||||||||
1939 | 40.10 | 39.11 | 50.65 | 62.57 | 68.85 | e | 70.20 | 83.07 | a | 85.06 | 74.53 | 60.26 | 46.47 | 38.61 | 59.96 | |||||||||||
1940 | 34.97 | 39.90 | 52.81 | 58.30 | 70.16 | 78.00 | 80.45 | 81.81 | 76.03 | 58.61 | 39.00 | ----- | z | 60.91 | a | |||||||||||
1941 | ----- | z | 46.15 | b | 58.45 | 65.30 | 66.55 | 72.97 | 86.87 | 83.52 | 65.93 | 60.19 | 49.30 | 38.94 | 63.11 | a | ||||||||||
1942 | 34.87 | 43.57 | 50.77 | 62.30 | 65.48 | 70.80 | 84.77 | 86.10 | 78.47 | 65.00 | 41.10 | 38.03 | 60.11 | |||||||||||||
1943 | 28.27 | a | 44.85 | b | ----- | z | ----- | z | ----- | z | ----- | z | 82.74 | 78.94 | 80.50 | 62.16 | 46.53 | 39.48 | 57.93 | d | ||||||
1944 | 38.26 | 43.28 | 49.32 | 60.50 | 70.90 | 75.87 | 85.16 | 81.87 | 79.67 | 69.71 | 44.50 | 33.84 | 61.07 | |||||||||||||
1945 | 39.83 | a | 45.00 | 49.10 | 57.97 | 72.71 | 77.18 | b | 85.48 | 85.32 | 73.67 | 69.16 | 43.77 | 34.56 | d | 61.15 | ||||||||||
1946 | 42.77 | 47.39 | 52.42 | 62.40 | 71.94 | 70.90 | 80.58 | 83.35 | 71.70 | 57.48 | 43.83 | 40.25 | g | 62.25 | a | |||||||||||
1947 | ----- | z | 45.18 | 56.45 | 64.07 | 75.00 | h | ----- | z | ----- | z | 78.74 | 75.47 | 55.70 | a | 46.27 | 36.79 | b | 57.33 | d | ||||||
1948 | 35.77 | e | 36.96 | a | 44.54 | g | 54.03 | 61.84 | 79.07 | 79.23 | 76.77 | 73.37 | 59.61 | 44.33 | 29.23 | 57.29 | a | |||||||||
1949 | 25.58 | 33.08 | c | 45.90 | 60.43 | 71.13 | 70.10 | 78.81 | 79.32 | 74.93 | 58.19 | 50.23 | 35.84 | 56.96 | ||||||||||||
1950 | 18.97 | 35.21 | 42.29 | 53.40 | 64.93 | c | 74.03 | 83.42 | 87.19 | 79.47 | 55.26 | 38.71 | p | 35.94 | 57.28 | a | ||||||||||
1951 | 33.16 | 39.00 | 42.39 | ----- | z | ----- | z | 75.70 | 84.42 | 79.32 | 75.57 | 52.87 | ----- | z | ----- | z | 60.30 | d | ||||||||
1952 | 27.77 | a | 39.21 | 46.94 | 61.23 | 69.21 | b | 70.30 | 82.68 | 81.23 | 78.30 | 70.03 | 40.97 | 33.52 | 58.45 | |||||||||||
1953 | 39.81 | 45.38 | o | 48.20 | f | 55.93 | 65.06 | 67.13 | 80.74 | d | 79.03 | 73.90 | 62.77 | 44.37 | 40.71 | 60.95 | b | |||||||||
1954 | 30.10 | 38.04 | 44.13 | 52.57 | 66.73 | a | 67.43 | 78.37 | d | 75.00 | 70.13 | 56.65 | 47.97 | 34.23 | 55.11 | |||||||||||
1955 | 35.10 | 40.00 | 40.48 | 49.43 | 60.10 | a | 72.83 | 77.19 | 81.16 | 73.38 | a | 54.68 | 33.33 | 28.10 | 53.82 | |||||||||||
1956 | 31.42 | 32.86 | 43.87 | a | 62.27 | 73.64 | c | 68.40 | 85.94 | 82.13 | 73.17 | 54.87 | 38.57 | 35.94 | 56.92 | |||||||||||
1957 | 23.74 | 38.64 | 45.44 | f | 60.65 | m | 70.90 | 73.30 | 76.59 | d | 74.94 | 77.67 | 55.03 | 48.07 | b | 39.30 | h | 59.88 | c | |||||||
1958 | 36.45 | 43.32 | 47.74 | 56.30 | 76.48 | 78.90 | 88.10 | ----- | z | ----- | z | ----- | z | 43.10 | a | 37.35 | 56.42 | c | ||||||||
1959 | 33.58 | 38.96 | 47.39 | 58.23 | 63.26 | 70.10 | 83.35 | 76.81 | 66.30 | 59.58 | 44.10 | 37.90 | a | 56.63 | ||||||||||||
1960 | 33.06 | 41.85 | b | 49.73 | i | ----- | z | 61.93 | c | 74.80 | 87.97 | ----- | z | 73.33 | 66.06 | 43.17 | a | 32.96 | d | 57.24 | c | |||||
1961 | 35.39 | c | 43.28 | c | 47.89 | c | 57.95 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.19 | i |
1962 | 35.68 | c | 41.44 | c | 47.52 | f | 61.32 | b | 60.60 | a | 77.06 | l | 80.36 | c | ----- | z | 77.69 | a | ----- | z | 44.18 | b | 38.56 | d | 54.98 | d |
1963 | 34.03 | b | 50.52 | e | 50.57 | a | 53.76 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.39 | l | 34.35 | k | 45.04 | i |
1964 | 36.23 | 45.71 | a | 47.28 | f | 55.57 | b | 65.75 | c | 72.38 | d | 84.67 | g | 76.57 | a | 71.10 | i | 61.93 | d | 40.79 | b | 31.52 | f | 56.87 | d | |
1965 | 35.35 | 43.88 | b | 51.23 | a | 61.71 | b | 65.07 | d | 75.75 | b | 84.97 | b | 80.46 | e | 72.81 | d | 63.41 | b | 46.97 | a | 34.47 | p | 61.97 | a | |
1966 | 34.37 | l | 43.36 | c | 50.00 | c | 61.80 | 71.60 | a | 72.21 | a | 79.28 | f | 83.82 | c | 80.14 | b | 59.97 | a | 46.79 | a | 37.50 | c | 60.72 | b | |
1967 | 38.93 | c | 47.12 | b | 48.33 | a | 54.67 | 67.90 | a | 78.93 | a | 84.07 | c | 91.71 | c | 83.14 | h | 60.61 | h | ----- | z | ----- | z | 63.96 | d | |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 68.10 | 73.57 | 85.32 | 75.52 | 73.00 | 54.29 | 42.17 | 29.48 | 62.68 | d | ||||||||
1969 | 21.74 | 37.08 | o | 49.35 | 55.20 | 72.45 | 79.10 | a | 80.55 | 78.87 | 70.80 | 57.68 | 45.17 | 32.61 | 58.50 | a | ||||||||||
1970 | 31.94 | 42.96 | 48.35 | 52.37 | 67.87 | 78.67 | 82.32 | 82.84 | 67.83 | 57.65 | 40.77 | 32.53 | n | 59.42 | a | |||||||||||
1971 | 35.94 | 41.64 | 42.48 | 54.37 | 69.06 | 69.30 | 83.68 | 86.81 | 67.90 | 57.06 | 42.97 | 32.84 | 57.00 | |||||||||||||
1972 | 31.13 | 37.24 | 47.35 | 51.67 | 69.63 | a | 73.47 | 80.16 | 83.67 | a | 68.03 | 62.77 | 42.60 | 30.32 | 56.50 | |||||||||||
1973 | 32.90 | 42.14 | 52.35 | 61.70 | 68.58 | 72.13 | 85.13 | 80.65 | 73.43 | 57.29 | 37.27 | 36.42 | 58.33 | |||||||||||||
1974 | 31.55 | 43.71 | 46.90 | 56.27 | 62.16 | 77.33 | 79.97 | 83.87 | 79.20 | 65.10 | 42.57 | 36.61 | 58.77 | |||||||||||||
1975 | 33.29 | 37.75 | 44.90 | 54.27 | 66.00 | 71.47 | 84.55 | 75.61 | 78.20 | 54.71 | 40.53 | 37.39 | 56.56 | |||||||||||||
1976 | 37.94 | 40.21 | 46.52 | 55.90 | 68.23 | 71.13 | 79.52 | 76.94 | 76.60 | 61.90 | 46.80 | 37.77 | 58.29 | |||||||||||||
1977 | 32.29 | 44.46 | 48.48 | 64.83 | 63.35 | 78.27 | 79.16 | 86.06 | 69.50 | 61.32 | 39.83 | 34.03 | 58.47 | |||||||||||||
1978 | 36.71 | 43.04 | 53.16 | 58.13 | 66.35 | 80.40 | 84.37 | a | 80.20 | a | 68.03 | 65.52 | 41.20 | 34.90 | 59.33 | |||||||||||
1979 | 27.77 | 39.43 | 53.26 | 60.93 | 70.13 | 77.53 | 85.42 | 83.65 | 78.20 | 65.97 | 40.60 | 39.03 | a | 60.16 | ||||||||||||
1980 | 30.61 | 40.14 | 48.94 | 64.17 | 68.58 | 71.30 | 82.58 | 77.94 | 73.10 | 64.55 | 42.40 | 36.42 | 58.39 | |||||||||||||
1981 | 39.58 | 41.25 | 55.90 | 58.50 | 66.26 | 67.93 | 80.68 | 88.29 | 74.97 | 59.84 | 45.27 | 35.19 | 59.47 | |||||||||||||
1982 | 34.68 | 38.36 | 48.55 | 55.37 | 67.45 | 78.43 | 80.58 | 80.71 | 72.50 | 57.45 | 38.43 | 33.35 | 57.16 | |||||||||||||
1983 | 38.81 | 41.50 | 51.68 | 60.20 | 72.07 | a | 71.97 | 76.00 | 82.13 | 69.13 | 59.94 | 41.77 | 26.61 | 57.65 | ||||||||||||
1984 | 38.81 | 43.10 | 52.77 | 54.73 | 61.26 | 71.30 | 82.58 | 82.06 | 68.90 | 54.55 | 39.27 | 30.55 | 56.66 | |||||||||||||
1985 | 29.84 | 39.54 | 49.52 | 58.73 | 70.00 | 75.20 | 89.61 | 80.77 | 67.27 | 54.26 | 32.63 | 27.03 | 56.20 | |||||||||||||
1986 | 37.29 | 40.96 | 54.42 | 56.63 | 67.68 | 78.72 | a | 74.81 | 85.97 | 65.37 | 64.26 | 41.40 | 32.03 | 58.30 | ||||||||||||
1987 | 31.58 | 42.25 | 48.87 | 63.03 | 69.13 | 79.63 | 78.31 | b | 81.84 | 79.80 | 66.68 | 46.07 | 31.52 | 59.89 | ||||||||||||
1988 | 32.60 | a | 44.90 | 49.63 | a | 60.07 | 65.29 | 70.83 | 79.58 | 81.23 | 73.13 | 65.84 | 40.03 | 33.16 | 58.02 | |||||||||||
1989 | 38.50 | a | 34.61 | 44.65 | 62.33 | 64.64 | c | 75.43 | 79.06 | 77.58 | 76.43 | 59.23 | 45.27 | 36.00 | 57.81 | |||||||||||
1990 | 36.52 | 39.21 | 51.58 | 62.23 | 63.10 | 71.00 | 83.67 | a | 80.81 | 79.50 | 53.16 | 44.83 | 27.19 | 57.73 | ||||||||||||
1991 | 34.19 | 45.64 | 47.23 | 56.93 | 62.68 | 68.90 | a | 81.06 | 81.39 | 78.37 | 59.87 | 39.40 | 36.77 | 57.70 | ||||||||||||
1992 | 34.94 | 40.93 | 58.61 | 59.57 | b | 72.68 | 80.00 | 79.13 | 82.29 | 69.23 | 60.81 | 41.03 | 30.42 | 59.14 | ||||||||||||
1993 | 27.68 | 37.00 | 46.19 | 54.57 | 72.42 | 69.83 | 71.58 | 78.35 | 76.97 | 64.45 | 41.10 | 31.84 | 56.00 | |||||||||||||
1994 | 42.06 | 34.96 | 53.39 | 60.63 | 68.70 | a | 71.83 | 84.42 | 80.06 | 78.27 | 57.84 | 37.27 | 31.29 | 58.39 | ||||||||||||
1995 | 32.26 | 42.29 | 47.55 | 57.20 | 70.16 | 72.70 | 79.65 | 73.71 | 76.07 | 53.90 | 42.33 | 32.40 | a | 56.68 | ||||||||||||
1996 | 31.39 | 35.48 | 47.55 | 56.27 | 59.42 | 71.80 | 83.65 | 80.87 | 69.20 | 54.84 | 38.07 | 27.55 | 54.67 | |||||||||||||
1997 | 34.58 | 40.89 | 44.93 | a | 53.43 | 67.81 | 70.13 | 78.52 | 82.55 | 71.93 | 55.03 | 44.10 | 35.10 | 56.58 | ||||||||||||
1998 | 31.68 | 40.11 | 49.55 | 59.23 | 66.27 | a | 73.43 | 85.06 | 83.90 | 80.60 | 58.45 | 42.53 | 30.52 | 58.44 | ||||||||||||
1999 | 37.83 | a | 38.07 | 45.03 | 58.40 | 62.29 | 68.40 | 78.90 | 81.39 | 73.63 | 57.45 | 43.67 | 35.48 | 56.71 | ||||||||||||
2000 | 32.87 | 39.17 | 47.71 | 62.23 | 63.50 | a | 72.47 | 79.52 | 79.13 | a | 69.80 | 56.97 | 37.47 | 29.65 | 55.87 | |||||||||||
2001 | 32.94 | 39.57 | 49.45 | 56.50 | 69.60 | a | 69.00 | 79.81 | 82.06 | 75.43 | 54.58 | 42.90 | 32.94 | 57.06 | ||||||||||||
2002 | 35.58 | 40.32 | 42.65 | 56.83 | 62.87 | 75.47 | 81.77 | 80.35 | 73.03 | 60.29 | 44.70 | 34.48 | 57.36 | |||||||||||||
2003 | 35.65 | 44.04 | 48.00 | 56.27 | 65.16 | 76.77 | 84.61 | 83.32 | 75.70 | 61.57 | a | 38.60 | 32.94 | 58.55 | ||||||||||||
2004 | 31.74 | 41.03 | 51.65 | 65.17 | 66.00 | 78.57 | 83.52 | 82.52 | 68.73 | 59.81 | 43.83 | 37.35 | 59.16 | |||||||||||||
2005 | 31.58 | 46.18 | 53.74 | 59.27 | 68.87 | 71.20 | 81.77 | a | 83.77 | 70.63 | 58.10 | 37.77 | 31.10 | 57.83 | ||||||||||||
2006 | 36.94 | 39.04 | 46.26 | 57.17 | a | 67.55 | 74.27 | 84.26 | 82.39 | 75.63 | 60.13 | 36.87 | 31.13 | a | 57.64 | |||||||||||
2007 | 30.10 | a | 39.04 | 48.71 | 56.03 | a | 68.74 | 72.13 | 84.23 | 80.07 | a | 72.77 | 54.35 | 41.53 | 31.94 | 56.64 | ||||||||||
2008 | 30.61 | 42.34 | 45.90 | 52.76 | a | 68.00 | 70.89 | c | 80.57 | a | 78.42 | 74.23 | 56.77 | a | 42.48 | a | 28.67 | d | 55.97 | |||||||
2009 | 33.53 | a | 39.07 | 42.13 | a | 58.03 | a | 66.87 | a | 75.33 | 85.65 | 82.87 | 75.15 | d | 51.97 | a | 41.20 | 28.92 | f | 59.26 | a | |||||
2010 | 35.23 | 42.64 | 50.68 | 55.27 | 61.06 | 69.00 | 82.90 | b | 79.07 | b | 68.69 | a | 59.06 | 38.70 | 32.39 | 56.22 | ||||||||||
2011 | 35.48 | 39.37 | a | 45.03 | 50.83 | 60.35 | 69.73 | 76.74 | 82.42 | 77.67 | 55.45 | 39.47 | 36.61 | 55.76 | ||||||||||||
2012 | 33.00 | i | 41.44 | b | 44.19 | 56.77 | 64.32 | 65.90 | i | 83.27 | a | 84.67 | d | 78.86 | b | 58.50 | a | 41.29 | b | 35.00 | 58.83 | b | ||||
2013 | 31.40 | a | 44.63 | a | 50.07 | b | 55.60 | 67.50 | a | 72.34 | a | 85.77 | a | 82.41 | b | 73.70 | 59.10 | 43.75 | b | 35.07 | a | 58.44 | ||||
2014 | 37.00 | 32.21 | 46.52 | 56.21 | a | 68.23 | 73.29 | b | 86.13 | 84.25 | c | 75.10 | 61.07 | a | 43.26 | c | 35.25 | c | 58.21 | |||||||
2015 | 36.19 | 46.86 | 56.30 | a | 57.40 | 70.20 | a | 83.81 | d | 85.43 | a | 84.31 | b | 70.64 | b | 64.17 | a | 43.11 | b | 32.07 | d | 60.87 | ||||
2016 | 33.87 | a | 44.45 | 49.80 | a | 66.17 | 68.70 | a | 74.83 | 79.13 | 84.07 | b | 72.43 | 54.35 | 48.68 | b | 29.52 | 58.83 | ||||||||
2017 | 26.35 | 36.79 | 44.32 | 53.62 | a | 68.13 | 72.97 | 85.68 | 88.23 | a | 75.73 | 57.03 | 41.38 | a | 32.21 | c | 56.87 | |||||||||
2018 | 36.23 | 40.44 | a | 46.97 | 54.69 | a | 72.84 | 72.90 | a | 85.17 | b | 83.13 | 71.97 | a | 60.40 | a | 46.37 | 36.07 | a | 58.93 | ||||||
2019 | 35.17 | a | 29.89 | 45.81 | 57.34 | a | 69.31 | b | 74.23 | 79.00 | 83.35 | 70.00 | b | 53.39 | 47.23 | 32.23 | a | 56.41 | ||||||||
2020 | 35.41 | b | 44.17 | 48.90 | 59.00 | 66.35 | 70.97 | a | 80.81 | 84.40 | a | 76.83 | 60.59 | b | 42.15 | d | 36.58 | 58.85 | ||||||||
2021 | 36.81 | 35.75 | 49.52 | 60.67 | 66.20 | a | 80.24 | a | 88.31 | b | 83.29 | 72.14 | b | 57.27 | a | 45.21 | b | 31.60 | a | 58.92 | ||||||
2022 | 32.33 | g | 42.18 | 51.00 | 49.87 | 58.16 | 69.59 | a | 85.31 | b | 88.16 | 77.97 | 69.57 | c | 36.57 | 25.97 | a | 59.49 | a | |||||||
2023 | 38.00 | d | 37.92 | b | 44.42 | 52.36 | b | 74.36 | f | 76.17 | a | 86.18 | c | 84.96 | c | 71.32 | e | 60.10 | a | 43.48 | a | 34.50 | a | 57.22 | a | |
2024 | 28.47 | a | 40.72 | 50.61 | 57.61 | b | 59.90 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.35 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.77 | 40.72 | 48.71 | 57.90 | 67.08 | 73.67 | 82.34 | 81.59 | 73.80 | 59.39 | 42.37 | 33.77 | 57.79 | |||||||||||||
S.D. | 4.30 | 3.87 | 3.81 | 3.82 | 3.70 | 3.69 | 3.39 | 3.61 | 4.07 | 4.35 | 3.46 | 3.43 | 1.55 | |||||||||||||
SKEW | -0.79 | -0.41 | 0.34 | 0.07 | -0.19 | 0.42 | -0.40 | -0.29 | -0.20 | 0.52 | -0.23 | -0.25 | 0.02 | |||||||||||||
MAX | 42.77 | 50.52 | 58.61 | 66.17 | 76.48 | 83.81 | 89.61 | 91.71 | 81.20 | 70.03 | 50.23 | 40.71 | 61.15 | |||||||||||||
MIN | 18.97 | 29.89 | 40.48 | 49.43 | 58.16 | 67.13 | 71.58 | 69.71 | 64.80 | 51.52 | 32.63 | 25.97 | 53.82 | |||||||||||||
YRS | 81 | 84 | 78 | 79 | 81 | 81 | 82 | 82 | 82 | 82 | 82 | 76 | 59 |