YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.96 | g | 85.23 | 83.52 | 76.77 | 64.45 | 45.57 | 37.10 | 65.44 | f | ||||||
1938 | 35.71 | 35.29 | 39.94 | 50.93 | 61.32 | 72.10 | 77.32 | 79.29 | 75.20 | 58.42 | 37.34 | a | 36.06 | 54.91 | ||||||||||||
1939 | 33.55 | 31.61 | 43.77 | 60.07 | a | 65.32 | 67.17 | 81.53 | a | 84.74 | 72.47 | 59.60 | a | 53.10 | 41.26 | 57.85 | ||||||||||
1940 | 36.10 | 37.97 | 45.39 | 55.17 | 68.55 | 76.73 | 82.77 | 84.84 | 65.34 | a | 58.90 | 37.37 | 35.52 | 57.05 | ||||||||||||
1941 | 32.90 | 40.18 | 44.45 | 52.90 | 63.06 | 67.30 | 81.23 | 77.39 | 64.07 | 58.41 | b | 48.43 | 34.55 | b | 55.41 | |||||||||||
1942 | 31.29 | 32.79 | 40.68 | 54.93 | a | 56.67 | a | 67.47 | 83.23 | 83.00 | a | 75.00 | 62.81 | 45.27 | 34.18 | c | 55.61 | |||||||||
1943 | 28.42 | 40.43 | 39.90 | 56.90 | 61.81 | 65.43 | 82.32 | 81.45 | 78.07 | 58.87 | ----- | z | 40.90 | 57.68 | a | |||||||||||
1944 | 34.68 | 37.66 | 40.58 | 50.20 | 64.06 | 64.47 | 78.35 | 80.23 | 72.62 | a | 67.48 | 38.90 | 33.29 | 55.21 | ||||||||||||
1945 | 36.74 | 35.86 | 41.97 | 48.72 | a | 62.97 | 65.67 | 81.40 | a | 81.48 | 67.97 | 64.94 | 41.30 | 29.23 | 54.85 | |||||||||||
1946 | 30.77 | a | 35.39 | 44.29 | 58.30 | 63.71 | 70.67 | 83.87 | a | 83.87 | a | 69.03 | 49.80 | a | 41.00 | a | 34.97 | 55.47 | ||||||||
1947 | 28.13 | 41.57 | 45.90 | a | 55.60 | 68.45 | b | 66.29 | b | 85.10 | 81.53 | a | 72.60 | 60.10 | 41.07 | a | 36.87 | 56.93 | ||||||||
1948 | 33.86 | b | 37.07 | a | 39.83 | a | 49.33 | 61.00 | a | 72.45 | a | 80.14 | b | 80.65 | 71.97 | 61.42 | 37.40 | 26.35 | 54.29 | |||||||
1949 | 19.97 | 33.89 | 42.71 | 59.83 | 66.29 | 72.07 | 83.00 | 82.65 | 75.40 | 56.26 | 53.43 | 32.39 | 56.49 | |||||||||||||
1950 | 24.42 | 38.11 | 40.00 | 51.20 | 63.55 | 71.57 | 80.39 | 80.55 | 70.27 | 61.87 | 44.00 | 39.35 | 55.44 | |||||||||||||
1951 | 28.58 | 36.64 | 37.06 | 56.57 | 64.90 | 68.60 | 83.03 | 77.10 | 74.21 | a | 54.68 | 41.70 | 24.81 | 53.99 | ||||||||||||
1952 | 25.42 | 31.79 | 36.00 | 52.70 | 65.19 | 71.47 | 80.00 | 81.90 | 77.80 | 70.61 | 41.70 | 29.61 | 55.35 | |||||||||||||
1953 | 37.45 | 36.61 | 42.32 | 51.17 | a | 57.69 | b | 68.90 | 85.39 | 81.35 | 77.55 | a | 64.61 | c | 48.66 | a | 35.06 | 57.23 | ||||||||
1954 | 33.13 | 41.36 | 39.03 | 55.52 | a | 67.20 | f | 65.93 | 82.03 | b | 79.23 | 73.87 | 60.53 | a | 51.47 | 34.10 | a | 56.02 | a | |||||||
1955 | 28.61 | 32.50 | 36.16 | 45.70 | 61.40 | a | 71.90 | 78.87 | 85.84 | 71.15 | c | 61.55 | 39.30 | 34.23 | 53.93 | |||||||||||
1956 | 31.19 | 29.69 | 39.45 | 54.57 | 64.35 | 73.27 | 82.65 | 79.23 | 75.73 | 55.35 | 43.03 | 35.29 | 55.32 | |||||||||||||
1957 | 26.06 | 38.32 | 42.42 | 51.43 | 61.52 | 71.60 | 81.65 | 81.29 | 75.00 | 57.16 | 40.43 | 34.45 | 55.11 | |||||||||||||
1958 | 32.00 | 39.29 | 37.84 | 46.33 | 71.13 | 71.50 | 79.26 | 83.84 | 73.14 | a | 65.39 | 43.53 | 40.65 | 56.99 | ||||||||||||
1959 | 33.48 | 34.54 | 40.81 | 56.63 | 57.94 | 75.83 | 86.10 | 80.45 | 65.37 | 62.06 | 48.67 | 38.77 | 56.72 | |||||||||||||
1960 | 27.77 | a | 29.72 | 41.97 | 53.33 | 62.19 | 76.37 | 87.39 | 80.13 | 76.40 | 60.32 | 40.27 | 31.68 | 55.63 | ||||||||||||
1961 | 34.55 | 38.71 | 41.97 | 54.57 | 64.94 | 79.50 | 86.10 | 85.48 | 64.30 | 56.81 | 41.70 | 27.68 | 56.36 | |||||||||||||
1962 | 29.32 | 34.89 | 36.10 | 56.97 | 59.71 | 72.67 | 79.74 | 78.26 | 75.60 | 63.52 | b | 49.83 | 37.94 | 56.21 | ||||||||||||
1963 | 30.61 | 45.71 | 44.35 | 49.10 | 64.00 | 64.93 | 79.68 | 82.55 | 75.00 | 64.71 | 40.67 | 33.00 | 56.19 | |||||||||||||
1964 | 27.74 | 32.83 | 35.84 | 50.00 | 62.97 | 65.57 | 83.35 | 79.19 | 71.07 | 65.29 | 41.27 | 30.58 | 53.81 | |||||||||||||
1965 | 31.81 | 35.29 | 38.32 | 51.13 | 59.71 | 71.00 | 79.29 | 76.26 | 63.87 | 67.58 | 47.50 | 33.71 | 54.62 | |||||||||||||
1966 | 29.23 | 32.79 | 40.26 | 55.33 | 70.97 | a | 72.80 | 85.77 | 83.58 | 77.57 | 60.16 | 46.17 | 30.03 | 57.05 | ||||||||||||
1967 | 33.71 | 37.00 | 39.87 | 43.40 | 64.03 | 66.97 | 83.23 | 85.81 | 76.30 | 58.94 | 44.93 | 29.52 | 55.31 | |||||||||||||
1968 | 30.03 | 39.83 | 46.23 | 51.93 | 61.81 | 72.50 | 84.58 | 73.40 | a | 70.93 | 59.97 | 40.83 | 32.23 | 55.36 | ||||||||||||
1969 | 31.52 | 31.68 | 39.16 | 53.73 | 70.29 | 69.57 | 81.94 | 87.17 | a | 74.73 | 53.55 | 48.60 | 36.13 | 56.50 | ||||||||||||
1970 | 32.45 | 40.75 | 41.29 | 47.73 | 66.00 | 73.13 | 82.48 | 85.97 | 68.10 | 54.87 | 42.27 | 27.26 | 55.19 | |||||||||||||
1971 | 31.13 | 35.11 | 37.84 | 48.60 | 64.39 | 69.10 | 82.48 | 86.19 | 66.60 | 57.81 | 41.10 | 26.77 | 53.93 | |||||||||||||
1972 | 29.55 | 35.55 | 48.26 | 51.97 | 66.97 | 74.07 | 82.52 | 81.90 | 66.07 | 58.68 | 41.83 | 28.77 | 55.51 | |||||||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | 68.37 | l | 73.13 | g | 80.13 | 79.77 | 67.31 | a | 59.77 | i | 37.46 | b | 33.25 | c | 59.59 | g | ||
1974 | 28.23 | 34.81 | a | 41.15 | d | 54.24 | i | 59.50 | k | 76.57 | p | 86.71 | x | 77.79 | b | 74.58 | d | 59.96 | d | 43.73 | d | 32.24 | b | 49.06 | d | |
1975 | 29.71 | 32.04 | 38.77 | 40.80 | e | 56.63 | d | 64.34 | a | 81.00 | 74.55 | 72.54 | d | 56.73 | e | 41.19 | d | 36.94 | 52.10 | |||||||
1976 | 33.71 | 38.19 | b | 38.17 | a | 50.95 | i | 65.12 | e | 69.35 | g | 81.37 | d | 72.47 | a | 70.11 | c | 60.27 | i | 50.00 | c | 38.85 | d | 54.22 | c | |
1977 | 31.54 | e | 41.68 | i | 40.31 | e | 58.42 | d | 54.73 | a | 77.10 | 78.77 | a | 78.53 | a | 69.00 | d | 62.69 | o | 41.11 | b | 33.57 | a | 56.31 | b | |
1978 | 33.03 | 36.30 | a | 47.52 | 49.17 | a | 58.60 | a | 70.83 | a | 78.74 | 76.00 | b | 65.35 | d | 63.29 | c | 41.86 | a | 26.03 | a | 53.89 | ||||
1979 | 22.48 | 34.54 | 43.74 | 51.73 | 64.29 | 72.26 | c | 80.21 | c | 76.67 | a | 73.04 | e | 58.83 | a | 39.56 | e | 35.93 | a | 54.44 | ||||||
1980 | 27.16 | 39.52 | 40.32 | 56.37 | 59.73 | a | 67.76 | a | 78.81 | 74.55 | 69.69 | d | 59.45 | 43.17 | 35.06 | 54.30 | ||||||||||
1981 | 35.68 | 37.29 | 46.45 | 56.93 | 58.77 | a | 69.66 | a | 80.30 | d | 82.80 | a | 72.10 | 52.35 | 45.38 | a | 32.58 | 55.86 | ||||||||
1982 | 28.41 | b | 31.00 | 41.71 | 45.11 | c | 60.26 | 67.87 | 76.16 | 80.97 | a | 68.23 | 53.60 | a | 36.67 | 29.43 | a | 51.62 | ||||||||
1983 | 32.94 | 36.96 | 42.29 | 46.10 | a | 62.03 | 68.87 | 75.66 | b | 78.48 | 70.10 | 59.00 | 39.07 | 24.06 | 52.96 | |||||||||||
1984 | 27.32 | 34.90 | 41.77 | a | 48.83 | 60.61 | 66.83 | 80.90 | 78.94 | ----- | z | 49.87 | a | 36.97 | 25.77 | 50.25 | a | |||||||||
1985 | 29.32 | 28.71 | 40.13 | 56.87 | 64.42 | 73.93 | 85.03 | b | 76.74 | 61.03 | 54.77 | 32.46 | b | 27.65 | 52.59 | |||||||||||
1986 | 35.16 | 38.00 | 50.32 | 53.37 | 62.30 | a | 76.79 | b | 75.32 | 82.35 | 62.07 | 59.48 | d | 44.12 | f | 36.48 | 57.42 | a | ||||||||
1987 | 29.81 | 39.29 | 45.23 | 63.20 | 66.10 | 74.80 | 74.77 | a | 79.77 | 75.57 | 65.35 | 44.30 | 30.68 | 57.40 | ||||||||||||
1988 | 30.03 | 39.10 | 44.74 | 56.14 | b | 62.48 | b | 76.48 | a | 83.77 | 81.71 | 70.83 | 67.30 | a | 37.43 | 28.42 | 56.54 | |||||||||
1989 | 26.00 | 30.18 | 42.10 | 56.93 | a | 61.61 | 71.63 | 83.03 | 74.65 | 69.83 | 54.77 | 45.57 | 37.73 | a | 54.50 | |||||||||||
1990 | 32.97 | 32.82 | 47.16 | 60.00 | 59.10 | 70.47 | 81.21 | b | 79.60 | a | 75.90 | 58.15 | e | 44.48 | a | 23.06 | 55.41 | |||||||||
1991 | 31.61 | 47.54 | 41.68 | 50.60 | e | 58.27 | a | 68.24 | a | 82.42 | 81.87 | 69.67 | 58.94 | 37.83 | a | 32.23 | a | 55.07 | ||||||||
1992 | 34.70 | a | 43.17 | 53.06 | 59.40 | 70.19 | 74.34 | a | 77.90 | b | 81.06 | 68.97 | 61.19 | 37.21 | a | 27.93 | a | 57.43 | ||||||||
1993 | 27.37 | a | 32.61 | 42.71 | 49.30 | 67.19 | 65.00 | a | 70.23 | 74.00 | 68.93 | a | 58.77 | e | 40.53 | 30.97 | 52.30 | |||||||||
1994 | 36.26 | 33.75 | 49.77 | 57.53 | 66.48 | 74.13 | 83.86 | c | 83.45 | b | 74.56 | c | 54.84 | 33.50 | b | 29.87 | 56.50 | |||||||||
1995 | 31.90 | 39.96 | d | 41.36 | c | 51.70 | 58.94 | 66.86 | a | 77.67 | a | 78.68 | 72.07 | b | 55.50 | i | 47.72 | l | 31.41 | b | 55.05 | b | ||||
1996 | 31.13 | 35.59 | b | 44.35 | 52.97 | 59.52 | 74.70 | 84.29 | 80.52 | 67.27 | 55.97 | 43.20 | 31.77 | a | 55.11 | |||||||||||
1997 | 30.65 | 34.75 | 43.65 | 49.79 | b | 67.34 | b | 71.56 | c | 78.07 | b | 79.13 | 68.38 | a | 54.35 | 43.33 | 32.87 | a | 54.49 | |||||||
1998 | 34.76 | b | 37.07 | 41.58 | 52.53 | 60.53 | a | 63.00 | 85.06 | 82.23 | 72.93 | 56.35 | 40.13 | 29.26 | 54.62 | |||||||||||
1999 | 33.55 | 34.24 | c | 42.60 | a | 51.85 | d | 61.85 | k | 69.20 | e | 80.28 | b | 80.22 | d | 70.72 | a | 62.77 | 52.96 | b | 37.48 | d | 55.99 | a | ||
2000 | 31.20 | a | 38.90 | 43.19 | 57.92 | f | 62.55 | 73.64 | b | 81.16 | 84.69 | b | 68.57 | 56.83 | g | 36.82 | b | 33.21 | c | 55.39 | b | |||||
2001 | 33.55 | 33.39 | 48.57 | a | 52.62 | a | 68.62 | b | 71.17 | g | 78.03 | a | 80.81 | 71.54 | b | 58.42 | 45.77 | 25.97 | b | 54.30 | a | |||||
2002 | 28.84 | 33.52 | a | 37.03 | 53.93 | 65.60 | a | 75.67 | 85.16 | 77.87 | 71.00 | a | 55.13 | 42.72 | a | 33.97 | 55.04 | |||||||||
2003 | 37.62 | b | 35.33 | a | 43.90 | a | 50.90 | a | 61.68 | 73.66 | a | 86.32 | 82.97 | 71.37 | 63.20 | a | 38.19 | d | 33.20 | a | 56.53 | |||||
2004 | 29.26 | 31.90 | 48.33 | a | 57.28 | a | 60.97 | 71.00 | b | 79.57 | a | 76.87 | 67.52 | a | 56.06 | 43.57 | 33.32 | 54.64 | ||||||||
2005 | 32.68 | 37.21 | 43.77 | 51.17 | a | 58.70 | a | 64.73 | 82.23 | 80.00 | 67.40 | 58.87 | a | 41.40 | 29.61 | 53.98 | ||||||||||
2006 | 31.43 | a | 31.44 | a | 37.29 | 50.23 | 65.74 | 73.44 | c | 84.97 | 78.26 | 68.03 | 56.03 | 40.50 | 31.39 | 54.06 | ||||||||||
2007 | 28.90 | 37.71 | 48.90 | 54.73 | 66.00 | 73.63 | 86.06 | 80.10 | 68.20 | 53.58 | 42.05 | h | 28.33 | a | 56.92 | a | ||||||||||
2008 | 25.16 | 33.76 | 38.23 | 44.93 | b | 62.03 | 69.90 | 82.74 | 80.94 | 69.75 | b | 63.78 | v | 48.64 | h | 31.17 | a | 53.86 | b | |||||||
2009 | 34.52 | 36.25 | 39.19 | 52.50 | 52.67 | v | 65.23 | 78.71 | 76.29 | 75.37 | 48.48 | 43.50 | 28.55 | 52.60 | a | |||||||||||
2010 | 33.39 | 34.11 | 42.84 | 49.70 | 53.65 | 64.97 | 76.90 | 73.52 | 67.77 | 57.55 | 40.70 | c | 29.90 | 52.08 | ||||||||||||
2011 | 30.77 | 32.54 | 39.87 | 46.09 | g | ----- | z | 65.48 | c | 77.77 | 78.84 | 72.55 | a | 56.66 | b | 38.20 | 34.53 | a | 52.72 | b | ||||||
2012 | 33.19 | 34.52 | 41.29 | 58.43 | 62.74 | 70.30 | 80.45 | 80.84 | 72.45 | a | 56.00 | 44.07 | 29.81 | 55.34 | ||||||||||||
2013 | 26.97 | 35.86 | 44.42 | 52.67 | c | 62.56 | f | 70.78 | l | 83.73 | a | 80.42 | 69.92 | e | 54.53 | a | 44.87 | 30.58 | 52.40 | b | ||||||
2014 | 38.29 | 35.96 | 45.81 | 52.40 | 62.52 | 69.48 | a | 83.40 | a | 72.87 | a | 66.60 | 62.72 | m | 40.83 | 34.29 | 54.77 | a | ||||||||
2015 | 36.61 | 44.00 | 50.90 | 55.73 | d | 62.43 | c | 79.76 | e | 76.77 | 78.65 | 70.87 | 62.07 | b | 37.20 | 25.73 | e | 56.73 | ||||||||
2016 | 30.39 | 38.62 | 43.16 | 58.80 | 59.84 | 72.80 | 79.10 | 78.69 | b | 64.14 | i | 53.81 | 47.93 | 25.06 | 53.47 | a | ||||||||||
2017 | 24.87 | 34.61 | 43.32 | 47.63 | 61.58 | 72.53 | 82.81 | 79.42 | 67.72 | a | 53.94 | 41.73 | 35.23 | 53.78 | ||||||||||||
2018 | 36.87 | 34.25 | 37.32 | 52.13 | 62.97 | 68.71 | b | 86.00 | r | 78.19 | 70.04 | b | 54.26 | 40.87 | 29.25 | k | 53.56 | b | ||||||||
2019 | 32.52 | 27.25 | 39.55 | b | 51.33 | 57.68 | 68.07 | 77.32 | 78.84 | 66.30 | 47.10 | 45.62 | a | 28.29 | 51.66 | |||||||||||
2020 | 30.84 | 34.59 | 42.87 | 53.17 | 60.38 | j | 66.72 | a | 78.82 | c | 82.07 | b | 72.57 | 59.61 | 40.27 | 33.77 | 54.12 | a | ||||||||
2021 | 33.00 | 34.14 | 43.65 | 53.20 | 60.39 | 78.43 | 83.94 | 75.10 | 70.57 | 54.84 | 45.16 | e | 31.65 | 55.34 | ||||||||||||
2022 | 27.68 | 32.86 | 37.71 | q | 44.00 | a | 55.17 | g | 70.86 | h | 82.35 | 81.71 | 74.13 | 54.50 | m | 34.27 | 26.57 | a | 50.45 | d | ||||||
2023 | 27.03 | 30.64 | 31.29 | 44.63 | 62.81 | 64.75 | j | 82.12 | e | 77.26 | 68.47 | 56.64 | f | 44.27 | 37.90 | 50.64 | b | |||||||||
2024 | 32.81 | 35.34 | 40.29 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.15 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.11 | 35.76 | 42.11 | 52.60 | 62.76 | 70.65 | 81.28 | 80.05 | 70.90 | 58.64 | 42.40 | 32.18 | 55.11 | |||||||||||||
S.D. | 3.56 | 3.69 | 3.83 | 4.37 | 3.65 | 3.94 | 3.12 | 3.27 | 3.83 | 4.57 | 4.36 | 4.16 | 1.47 | |||||||||||||
SKEW | -0.38 | 0.54 | 0.32 | -0.21 | 0.12 | 0.16 | -0.56 | -0.18 | -0.19 | 0.09 | 0.42 | 0.01 | -0.48 | |||||||||||||
MAX | 38.29 | 47.54 | 53.06 | 63.20 | 71.13 | 79.76 | 87.39 | 87.17 | 78.07 | 70.61 | 53.43 | 41.26 | 57.85 | |||||||||||||
MIN | 19.97 | 27.25 | 31.29 | 40.80 | 53.65 | 63.00 | 70.23 | 72.47 | 61.03 | 47.10 | 32.46 | 23.06 | 51.62 | |||||||||||||
YRS | 86 | 85 | 85 | 81 | 77 | 79 | 85 | 87 | 85 | 78 | 82 | 86 | 63 |