YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | 35.86 | b | 46.83 | 57.48 | b | 64.98 | 76.03 | 77.65 | 66.17 | 51.77 | 37.88 | 26.87 | d | 54.15 | b | |||||||
1938 | 30.30 | d | 34.04 | 41.47 | 48.42 | d | 55.32 | 69.12 | 73.37 | 75.47 | m | 64.47 | a | 54.60 | 32.45 | a | 27.73 | 48.30 | a | |||||||
1939 | 28.58 | 20.89 | 37.45 | 47.30 | 61.08 | 68.55 | 77.29 | 71.90 | 66.22 | 51.45 | 39.83 | 35.74 | 50.52 | |||||||||||||
1940 | 18.73 | k | 32.79 | 40.45 | 46.68 | 59.61 | 68.85 | f | 76.75 | a | 71.81 | 66.42 | 55.74 | 33.25 | 29.92 | 51.34 | b | |||||||||
1941 | 29.68 | 30.70 | 34.18 | 46.08 | 60.40 | 66.23 | 71.83 | d | 71.71 | 60.68 | 48.77 | 41.00 | 30.94 | 49.35 | ||||||||||||
1942 | 19.66 | 18.30 | 34.11 | 51.75 | 55.08 | 65.00 | 73.27 | 71.29 | 59.30 | 49.79 | 37.22 | 30.55 | 47.11 | |||||||||||||
1943 | 28.76 | 35.27 | 30.55 | 52.23 | 51.55 | 64.20 | 74.79 | 74.71 | 60.90 | 50.37 | 38.59 | a | 28.50 | 49.20 | ||||||||||||
1944 | 26.74 | 28.31 | 30.06 | 41.18 | 58.55 | 65.75 | 71.65 | a | 71.98 | 62.48 | a | 52.83 | a | 38.32 | b | 23.47 | 47.61 | |||||||||
1945 | 26.48 | 31.04 | 41.45 | 40.58 | 54.50 | 59.78 | 72.06 | 71.55 | 58.83 | 51.77 | 39.32 | 25.56 | 47.74 | |||||||||||||
1946 | 28.98 | 33.82 | 41.73 | 53.62 | 51.05 | 67.15 | 73.27 | 70.11 | 62.30 | 47.76 | 27.32 | 33.65 | 49.23 | |||||||||||||
1947 | 28.00 | 25.77 | 34.10 | 44.73 | 54.90 | 61.48 | 73.11 | 74.47 | a | 66.10 | 55.95 | 31.37 | 30.29 | 48.36 | ||||||||||||
1948 | 24.90 | 23.77 | a | 30.13 | 51.50 | a | 57.55 | 65.72 | 72.40 | 72.50 | 67.10 | 50.16 | 33.43 | 26.68 | 47.99 | |||||||||||
1949 | 13.34 | 28.45 | 35.48 | 47.50 | 58.21 | 65.18 | 73.06 | 70.13 | 61.22 | 47.55 | 44.87 | 29.44 | 47.87 | |||||||||||||
1950 | 24.55 | 35.02 | 34.65 | a | 44.62 | 52.02 | 66.87 | 69.23 | 68.65 | 59.78 | 56.40 | 37.17 | a | 32.68 | 48.47 | |||||||||||
1951 | 24.63 | 28.89 | 32.98 | 41.73 | 56.10 | 59.33 | 71.05 | 70.16 | 59.43 | 46.92 | 35.47 | 23.97 | 45.89 | |||||||||||||
1952 | 30.05 | 31.02 | 30.73 | 47.00 | 55.31 | 72.38 | 73.79 | 73.18 | 65.43 | 50.94 | 29.85 | 22.29 | 48.50 | |||||||||||||
1953 | 32.61 | 29.82 | 41.08 | 39.93 | 52.66 | 69.15 | 73.55 | 70.45 | 64.72 | 53.48 | 38.82 | 25.65 | 49.33 | |||||||||||||
1954 | 28.45 | 40.57 | 31.71 | 51.03 | 53.76 | 68.45 | 76.97 | 72.45 | 65.07 | 48.50 | 40.62 | 31.08 | 50.72 | |||||||||||||
1955 | 22.23 | 23.14 | 33.58 | 48.23 | 57.85 | 60.75 | 75.97 | 74.60 | 63.60 | 52.50 | 32.48 | 29.94 | 47.91 | |||||||||||||
1956 | 30.02 | 24.83 | 36.95 | 43.12 | 59.23 | 73.10 | 71.81 | 68.98 | 64.73 | 54.77 | 30.53 | 28.47 | 48.88 | |||||||||||||
1957 | 21.48 | 37.70 | 35.89 | 41.48 | 52.65 | 64.25 | 73.52 | 71.94 | 60.30 | 49.50 | 33.73 | 35.16 | 48.13 | |||||||||||||
1958 | 30.13 | 33.11 | 27.13 | 42.88 | 60.63 | 66.97 | 69.23 | 73.52 | 64.05 | 52.29 | 37.38 | 31.85 | 49.10 | |||||||||||||
1959 | 26.55 | 27.75 | 35.37 | 44.50 | 55.68 | 71.13 | 72.94 | 74.47 | a | 60.25 | 46.24 | 35.59 | a | 34.02 | 48.71 | |||||||||||
1960 | 22.90 | 19.16 | 33.52 | 49.35 | 56.32 | 66.92 | 73.52 | 73.61 | 64.47 | 52.60 | 38.60 | 27.92 | 48.24 | |||||||||||||
1961 | 28.76 | 34.16 | 36.63 | 42.90 | 54.32 | 67.60 | 72.58 | 72.74 | 56.38 | 50.92 | 34.50 | 25.65 | 48.10 | |||||||||||||
1962 | 18.63 | 31.14 | 34.37 | 49.68 | 60.53 | 65.17 | 71.77 | 72.68 | 62.40 | 53.82 | 41.57 | 32.84 | 49.55 | |||||||||||||
1963 | 16.67 | a | 36.52 | 39.32 | 50.13 | 61.35 | 70.52 | 76.69 | 72.16 | 66.48 | 59.00 | 40.90 | 24.66 | 51.20 | ||||||||||||
1964 | 30.47 | 25.29 | 31.69 | 45.57 | 58.29 | 65.73 | 77.16 | 69.40 | 61.92 | 51.84 | 37.65 | 29.27 | 48.69 | |||||||||||||
1965 | 33.18 | 25.28 | a | 26.23 | 50.30 | 57.00 | 63.85 | 72.68 | 69.42 | 53.63 | 54.61 | 42.95 | 33.05 | 48.51 | ||||||||||||
1966 | 21.53 | 25.04 | 40.69 | 43.83 | 59.44 | 66.32 | 76.16 | 69.15 | 62.75 | 49.11 | 39.30 | 28.24 | 48.46 | |||||||||||||
1967 | 32.19 | 32.88 | 41.95 | 48.30 | 52.06 | 62.62 | 71.55 | 69.47 | 61.67 | 51.74 | 36.93 | 22.79 | 48.68 | |||||||||||||
1968 | 27.73 | 32.60 | 39.82 | 43.08 | 51.69 | 68.75 | 71.90 | 68.39 | 61.55 | 52.02 | 35.65 | 25.05 | 48.19 | |||||||||||||
1969 | 29.03 | 32.80 | 30.50 | 50.72 | 59.08 | 61.92 | 74.68 | 73.79 | 65.52 | 39.48 | 37.85 | 30.63 | 48.83 | |||||||||||||
1970 | 28.63 | 35.89 | 30.84 | 42.90 | 59.32 | 66.23 | 73.48 | 75.24 | 59.85 | 46.02 | 37.55 | 31.84 | 48.98 | |||||||||||||
1971 | 26.79 | 28.21 | 35.74 | 46.70 | 52.81 | 69.10 | 70.68 | 73.23 | 58.77 | 48.94 | 37.58 | 29.82 | 48.20 | |||||||||||||
1972 | 25.06 | 35.10 | 43.16 | 47.28 | 56.69 | 68.68 | 69.50 | 70.53 | 61.38 | 48.84 | 26.60 | 17.42 | 47.52 | |||||||||||||
1973 | 21.08 | 26.89 | 36.23 | 41.55 | 54.05 | 67.07 | 70.53 | 74.35 | 58.85 | 52.06 | 36.35 | 28.02 | 47.25 | |||||||||||||
1974 | 20.74 | 32.23 | 39.89 | 46.88 | 59.61 | 68.08 | 75.84 | 67.87 | 59.32 | 52.71 | 36.63 | 29.10 | 49.08 | |||||||||||||
1975 | 28.35 | 27.82 | 33.68 | 44.17 | 54.56 | 64.17 | 73.50 | 72.23 | 59.50 | 52.79 | 34.42 | 31.74 | 48.08 | |||||||||||||
1976 | 29.11 | 37.21 | 35.73 | 47.80 | 55.60 | 66.42 | 74.47 | 71.39 | 62.07 | 46.58 | 35.57 | 32.29 | 49.52 | |||||||||||||
1977 | 21.53 | 35.52 | 35.90 | 49.67 | 60.42 | 71.03 | 74.81 | 70.02 | 66.80 | 52.15 | 37.08 | 31.18 | 50.51 | |||||||||||||
1978 | 20.52 | 22.88 | 40.61 | 47.88 | 54.56 | 67.68 | 75.13 | 69.39 | 65.10 | 51.89 | 35.30 | 20.03 | 47.58 | |||||||||||||
1979 | 14.98 | 30.77 | 38.74 | 48.43 | 53.42 | 65.43 | 72.10 | 68.48 | 65.85 | 52.27 | 30.35 | 31.23 | 47.67 | |||||||||||||
1980 | 22.26 | 30.84 | 33.90 | 44.92 | 55.03 | 70.15 | 75.97 | 71.53 | 64.68 | 50.10 | 39.53 | 36.87 | 49.65 | |||||||||||||
1981 | 33.00 | 32.93 | 36.52 | 53.07 | 53.94 | 68.67 | 73.48 | 69.65 | 66.13 | 50.47 | 42.80 | 32.87 | 51.13 | |||||||||||||
1982 | 27.09 | b | 29.79 | 38.11 | 45.10 | 56.90 | 62.00 | 73.23 | 72.94 | o | 62.17 | 49.27 | 34.53 | 30.00 | 46.20 | a | ||||||||||
1983 | 30.26 | 35.84 | 36.45 | 39.90 | 52.32 | 63.40 | 74.06 | 76.81 | 65.58 | 52.73 | 37.03 | 13.37 | a | 48.15 | ||||||||||||
1984 | 22.78 | a | 29.62 | 35.06 | 39.93 | 58.92 | 66.20 | 73.76 | 73.42 | 59.58 | 45.74 | 39.65 | 30.56 | 47.94 | ||||||||||||
1985 | 22.58 | 26.02 | 40.26 | 50.10 | 59.60 | 66.03 | 73.50 | 71.87 | 58.55 | 49.89 | 27.98 | 22.82 | 47.43 | |||||||||||||
1986 | 35.77 | 32.56 | a | 45.73 | 48.70 | 55.81 | 69.30 | 74.55 | 72.26 | 61.00 | 50.85 | 37.63 | 28.47 | 51.05 | ||||||||||||
1987 | 29.76 | 34.68 | 35.40 | 50.73 | 59.10 | 67.82 | 73.37 | 67.81 | 61.48 | 50.39 | 38.00 | 26.94 | 49.62 | |||||||||||||
1988 | 20.63 | 29.07 | 35.47 | 46.30 | 56.39 | 72.03 | 73.53 | 73.48 | 60.93 | 51.31 | 37.37 | 29.11 | 48.80 | |||||||||||||
1989 | 30.44 | 20.12 | 39.47 | 48.43 | 58.77 | 64.43 | 75.13 | 70.66 | 60.98 | 50.15 | 40.97 | 23.56 | 48.59 | |||||||||||||
1990 | 30.74 | 28.36 | 38.16 | 47.22 | 54.15 | 70.90 | 70.58 | 71.10 | 66.40 | 50.74 | 40.87 | 22.77 | 49.33 | |||||||||||||
1991 | 24.76 | 38.55 | 39.82 | 46.72 | 59.08 | 70.10 | 73.00 | 72.18 | 63.78 | 50.03 | 32.70 | 31.37 | 50.17 | |||||||||||||
1992 | 27.63 | 37.97 | 41.56 | 52.22 | 59.02 | 64.48 | 69.63 | 68.10 | 65.03 | 52.89 | 31.77 | 20.66 | 49.25 | |||||||||||||
1993 | 22.24 | 24.66 | 38.95 | 46.25 | 57.82 | 65.10 | 71.16 | 69.87 | 59.52 | 48.69 | 32.02 | 31.21 | 47.29 | |||||||||||||
1994 | 30.35 | 28.54 | 42.81 | 47.65 | 62.18 | 72.92 | 71.90 | 73.56 | 66.18 | 51.11 | 36.03 | 34.02 | 51.44 | |||||||||||||
1995 | 30.85 | 35.68 | 39.52 | 42.45 | 49.29 | 64.20 | 72.60 | 76.71 | 61.75 | 49.15 | 42.53 | 33.26 | 49.83 | |||||||||||||
1996 | 25.92 | 33.28 | ----- | z | ----- | z | ----- | z | ----- | z | 71.25 | a | 70.24 | 60.77 | 49.94 | 34.84 | a | 30.71 | 47.12 | d | ||||||
1997 | 24.92 | a | 30.62 | 41.03 | a | 40.47 | 56.70 | a | 67.98 | a | 73.87 | a | 70.44 | 64.92 | 50.11 | 35.15 | 27.92 | 48.68 | ||||||||
1998 | 32.59 | b | 34.43 | 35.90 | 45.00 | 60.27 | 63.88 | 74.23 | 71.79 | 68.85 | 49.82 | 41.97 | 28.66 | 50.62 | ||||||||||||
1999 | 32.95 | 38.55 | 41.76 | 43.70 | 55.52 | 65.57 | 75.58 | 71.27 | 58.80 | 51.56 | 45.28 | 32.76 | 51.11 | |||||||||||||
2000 | 30.85 | 37.33 | 40.42 | 49.09 | b | 60.05 | 67.32 | 76.42 | 75.73 | 63.83 | 51.13 | 29.10 | a | 26.68 | 50.66 | |||||||||||
2001 | 29.85 | 27.77 | 37.90 | 49.33 | 56.47 | 68.40 | 76.77 | 72.95 | 65.22 | 51.27 | 41.27 | 31.44 | 50.72 | |||||||||||||
2002 | 29.85 | 33.14 | 32.98 | 49.80 | 56.48 | 73.27 | 77.82 | 72.18 | 62.10 | 44.11 | 36.45 | 33.47 | 50.14 | |||||||||||||
2003 | 34.31 | 27.09 | 40.69 | 49.65 | 56.48 | 63.13 | 77.87 | a | 74.56 | 59.98 | 55.21 | 35.17 | a | 31.71 | 50.49 | |||||||||||
2004 | 30.13 | 29.84 | 44.81 | 48.27 | 59.40 | 64.55 | 71.37 | 68.24 | 65.03 | 51.76 | 35.90 | 32.15 | 50.12 | |||||||||||||
2005 | 30.11 | 35.29 | 39.60 | 46.32 | 56.65 | 66.80 | 77.44 | 71.29 | 66.60 | 51.61 | 41.88 | 28.42 | 51.00 | |||||||||||||
2006 | 37.15 | 30.25 | 37.92 | 51.22 | 59.81 | 72.00 | 76.68 | 72.56 | 57.90 | 48.21 | 39.82 | 29.32 | 51.07 | |||||||||||||
2007 | 18.40 | a | 26.80 | 46.47 | 46.55 | 59.71 | 68.28 | 76.81 | 76.21 | 65.92 | 53.37 | 41.30 | 23.21 | 50.25 | ||||||||||||
2008 | 22.26 | 30.97 | 39.60 | 46.32 | 56.00 | 66.65 | 77.00 | 70.53 | a | 61.65 | 51.77 | 41.42 | 27.27 | c | 49.29 | |||||||||||
2009 | 31.65 | 35.57 | 39.55 | 45.19 | a | 58.13 | 64.77 | 71.13 | 69.85 | 61.93 | 41.05 | 41.15 | 22.57 | b | 48.54 | |||||||||||
2010 | 29.53 | 27.84 | 40.47 | 48.08 | 53.66 | 68.47 | 74.34 | 74.63 | 67.30 | 54.16 | 37.23 | 33.02 | 50.73 | |||||||||||||
2011 | 25.81 | 26.79 | 41.06 | 46.58 | 50.89 | l | 70.46 | q | 76.26 | 77.24 | 63.30 | 50.87 | 38.53 | 27.76 | 47.42 | b | ||||||||||
2012 | 33.71 | 26.48 | a | 48.42 | 53.40 | 60.31 | 75.72 | 78.85 | 74.65 | 66.17 | 47.94 | 43.37 | 28.97 | 53.16 | ||||||||||||
2013 | 28.82 | 29.48 | 36.34 | 40.46 | b | 57.63 | 70.68 | 72.74 | 73.50 | 66.38 | 47.35 | 38.70 | 27.26 | 49.11 | ||||||||||||
2014 | 28.40 | 23.59 | 39.11 | 47.80 | 57.02 | 66.22 | 73.53 | 71.56 | 64.02 | 54.24 | 34.52 | 28.27 | 49.02 | |||||||||||||
2015 | 28.69 | 32.68 | 45.24 | 49.33 | 52.84 | 69.89 | h | 72.60 | b | 73.69 | 69.78 | a | 55.37 | 38.25 | 28.48 | 49.72 | a | |||||||||
2016 | 30.50 | 35.93 | 43.93 | b | 47.22 | a | 54.56 | 71.63 | 74.27 | a | 70.63 | 64.87 | 57.06 | 45.02 | 25.69 | 51.78 | ||||||||||
2017 | 26.87 | 37.82 | 46.29 | 48.77 | 55.76 | 69.33 | 77.29 | 70.77 | 64.40 | 49.48 | 43.50 | 29.81 | 51.67 | |||||||||||||
2018 | 31.81 | 27.30 | 42.40 | 45.47 | a | 60.60 | 70.28 | 74.47 | 71.53 | 66.37 | 48.34 | b | 35.95 | b | 31.10 | 50.47 | ||||||||||
2019 | 30.73 | 23.84 | 34.68 | 50.80 | c | 51.53 | 65.88 | 74.92 | 73.21 | 68.98 | a | 42.85 | 36.83 | 32.39 | 48.89 | |||||||||||
2020 | 33.13 | 30.02 | 41.06 | 45.58 | 57.53 | 73.27 | b | 75.94 | 75.90 | 63.23 | 47.19 | 43.17 | 30.55 | 51.38 | ||||||||||||
2021 | 31.11 | 22.89 | 39.08 | 44.83 | a | 55.68 | 70.58 | 75.69 | 75.18 | 68.75 | 53.47 | 44.43 | 35.78 | b | 51.46 | |||||||||||
2022 | 27.77 | 27.61 | 37.06 | 46.90 | 57.31 | b | 71.12 | 77.29 | 75.13 | 68.00 | 52.07 | a | 34.10 | 26.24 | 50.05 | |||||||||||
2023 | 22.27 | 23.41 | e | 32.29 | 47.15 | 59.31 | b | 65.08 | 72.45 | 73.61 | 66.85 | c | 50.68 | 41.90 | 35.42 | 49.20 | ||||||||||
2024 | 25.61 | 38.38 | 39.18 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.39 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.22 | 30.37 | 37.64 | 46.78 | 56.66 | 67.20 | 73.91 | 72.12 | 63.21 | 50.75 | 37.33 | 28.87 | 49.28 | |||||||||||||
S.D. | 4.74 | 4.99 | 4.43 | 3.38 | 2.87 | 3.31 | 2.24 | 2.33 | 3.17 | 3.25 | 4.16 | 4.21 | 1.36 | |||||||||||||
SKEW | -0.64 | -0.21 | -0.11 | -0.22 | -0.30 | 0.07 | 0.03 | 0.23 | -0.27 | -0.66 | -0.34 | -0.88 | 0.29 | |||||||||||||
MAX | 37.15 | 40.57 | 48.42 | 53.62 | 62.18 | 75.72 | 78.85 | 77.65 | 69.78 | 59.00 | 45.28 | 36.87 | 53.16 | |||||||||||||
MIN | 13.34 | 18.30 | 26.23 | 39.90 | 49.29 | 59.33 | 69.23 | 67.81 | 53.63 | 39.48 | 26.60 | 13.37 | 45.89 | |||||||||||||
YRS | 86 | 87 | 87 | 86 | 85 | 83 | 87 | 85 | 87 | 87 | 87 | 87 | 80 |