YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.62 | a | 64.00 | 62.45 | 56.57 | 51.61 | 35.63 | 30.65 | 51.79 | e | ||||||
1951 | 25.97 | 28.29 | 35.06 | 41.97 | 53.71 | 60.93 | 69.26 | 66.13 | 59.93 | 48.06 | 32.83 | 28.29 | 45.87 | |||||||||||||
1952 | 29.97 | 29.28 | 31.68 | 44.17 | 53.48 | 64.33 | 65.03 | 66.65 | 58.00 | 47.42 | 32.43 | 26.84 | 45.77 | |||||||||||||
1953 | 32.10 | 29.61 | 40.19 | 44.87 | 48.84 | 63.67 | 66.74 | 64.26 | 57.10 | 45.77 | 34.60 | 20.52 | 45.69 | |||||||||||||
1954 | 27.29 | 33.25 | 36.00 | 48.77 | 54.23 | 61.67 | 66.84 | 63.84 | 60.80 | 50.48 | 36.43 | 25.87 | 47.12 | |||||||||||||
1955 | 24.97 | 23.93 | 35.52 | 41.47 | 51.13 | 59.30 | 63.87 | 64.87 | 58.17 | 48.19 | 34.53 | 29.16 | 44.59 | |||||||||||||
1956 | 31.48 | 24.34 | 35.29 | 41.83 | 53.26 | 65.10 | 64.42 | 62.68 | 58.63 | 46.13 | 27.57 | 24.81 | 44.63 | |||||||||||||
1957 | 32.87 | 39.93 | 38.39 | 42.77 | 51.23 | 62.63 | 67.16 | 63.39 | 56.07 | 47.33 | a | 32.63 | 28.58 | 46.91 | ||||||||||||
1958 | 26.90 | 35.50 | 34.77 | 43.20 | 54.13 | 65.23 | 66.45 | 66.68 | 58.97 | 47.61 | 35.93 | 29.71 | 47.09 | |||||||||||||
1959 | 27.16 | 30.50 | 34.06 | 45.80 | 52.13 | 64.80 | 66.29 | 65.19 | 58.50 | 47.68 | 33.97 | 31.03 | 46.43 | |||||||||||||
1960 | 25.90 | 27.38 | 38.97 | 45.30 | 52.35 | 64.43 | 65.52 | 65.19 | 58.80 | 46.16 | 36.60 | 20.65 | 45.60 | |||||||||||||
1961 | 25.87 | 31.29 | 36.48 | 43.00 | 52.16 | 62.20 | 64.87 | 64.45 | 54.93 | 45.65 | 32.77 | 29.97 | 45.30 | |||||||||||||
1962 | 25.48 | 35.36 | 31.39 | 46.23 | 51.84 | 59.47 | 63.71 | 64.74 | 59.20 | 49.03 | 39.17 | 30.74 | 46.36 | |||||||||||||
1963 | 22.52 | 32.57 | 35.97 | 45.20 | 54.71 | 59.67 | 67.29 | 63.87 | 59.20 | 50.23 | 37.00 | 24.74 | 46.08 | |||||||||||||
1964 | 20.74 | 21.66 | 33.87 | 42.17 | 52.68 | 60.40 | 65.68 | 64.03 | 58.70 | 46.45 | 34.27 | 27.23 | 43.99 | |||||||||||||
1965 | 29.48 | 26.96 | 32.03 | 43.77 | 50.74 | 58.10 | 66.35 | 63.55 | 56.93 | 46.68 | 39.97 | 30.42 | 45.42 | |||||||||||||
1966 | 22.39 | 26.75 | 36.52 | 45.10 | 54.23 | 60.90 | 68.06 | 63.16 | 57.53 | 45.19 | 37.87 | 26.58 | 45.36 | |||||||||||||
1967 | 24.16 | 31.29 | 40.39 | 45.33 | 50.48 | 58.87 | 66.81 | 61.84 | 56.30 | 46.39 | 37.07 | 25.00 | 45.33 | |||||||||||||
1968 | 27.74 | 33.59 | 35.94 | 40.97 | 51.06 | 60.63 | 64.13 | 61.32 | 54.34 | a | 46.48 | 34.23 | 23.55 | 44.50 | ||||||||||||
1969 | 31.03 | 28.89 | 30.65 | 46.33 | 52.77 | 60.80 | 66.71 | 66.32 | 58.20 | 47.06 | 34.53 | 30.32 | 46.14 | |||||||||||||
1970 | 26.16 | 32.57 | 34.52 | 39.67 | 52.45 | 59.43 | 66.19 | 65.52 | 56.93 | 41.35 | 34.17 | 29.32 | 44.86 | |||||||||||||
1971 | 26.45 | 30.18 | 37.52 | 41.57 | 49.48 | 61.03 | 65.61 | 61.94 | 56.37 | 45.65 | 35.63 | 27.61 | 44.92 | |||||||||||||
1972 | 27.65 | 32.52 | 42.87 | 44.80 | 51.29 | 60.87 | 65.68 | 62.26 | 57.33 | 49.45 | 31.20 | 26.77 | 46.06 | |||||||||||||
1973 | 25.52 | 30.64 | 35.19 | 39.80 | 52.16 | 60.37 | 64.29 | 63.26 | 57.93 | 46.65 | 37.13 | 27.55 | 45.04 | |||||||||||||
1974 | 26.03 | 26.07 | 41.87 | 43.33 | 55.06 | 63.70 | 64.58 | 61.90 | 56.20 | 47.65 | 34.80 | 25.35 | 45.55 | |||||||||||||
1975 | 24.87 | 29.75 | 34.58 | 39.27 | 48.10 | 60.57 | 63.77 | 63.52 | 56.03 | 44.77 | 33.93 | 27.03 | 43.85 | |||||||||||||
1976 | 25.03 | 34.41 | 35.06 | 43.37 | 51.65 | 60.30 | 63.45 | 62.13 | 54.97 | 41.29 | 29.97 | 23.90 | 43.79 | |||||||||||||
1977 | 26.19 | 30.86 | 32.42 | 44.13 | 52.23 | 63.20 | 67.23 | 67.94 | 61.70 | 50.35 | 39.63 | 35.23 | 47.59 | |||||||||||||
1978 | 33.42 | 34.11 | 42.26 | 48.50 | 54.81 | 66.83 | 67.77 | 64.13 | 57.27 | 48.29 | 40.07 | 27.65 | 48.76 | |||||||||||||
1979 | 27.35 | 31.71 | 37.77 | 45.07 | 52.35 | 59.97 | 67.03 | 61.65 | 57.93 | 50.23 | 31.67 | 27.68 | 45.87 | |||||||||||||
1980 | 33.61 | 35.62 | 37.29 | 43.33 | 53.06 | 65.17 | 69.52 | 65.29 | 60.73 | 44.57 | c | 34.50 | 30.26 | 47.75 | ||||||||||||
1981 | 31.35 | 34.04 | 36.32 | 46.27 | 54.26 | 64.97 | 67.26 | 63.71 | 59.63 | 48.61 | 38.50 | 31.61 | 48.04 | |||||||||||||
1982 | 27.58 | 32.96 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.27 | j | |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.00 | o | ----- | z |
1990 | 28.28 | m | 31.93 | n | 38.17 | m | 44.69 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.03 | 37.07 | 29.10 | 37.73 | i | |||
1997 | 29.87 | a | 31.43 | 39.52 | 43.20 | 55.87 | 61.43 | 65.00 | d | 66.29 | 62.17 | 46.52 | 35.90 | 25.23 | 46.87 | |||||||||||
1998 | 29.84 | 31.21 | 36.52 | 40.07 | 53.71 | 62.27 | 66.68 | 64.81 | 62.27 | 48.58 | 37.80 | 30.19 | 46.99 | |||||||||||||
1999 | 31.84 | 33.50 | 39.06 | 41.70 | 53.48 | 62.23 | 65.87 | 64.48 | 58.43 | 45.57 | a | 37.41 | a | 26.29 | 46.66 | |||||||||||
2000 | 30.80 | a | 34.82 | a | 37.71 | 48.13 | 60.68 | c | 62.60 | 67.65 | 65.06 | 59.80 | 48.57 | a | 30.47 | 28.03 | 47.86 | |||||||||
2001 | 26.13 | 31.93 | 38.70 | a | 45.20 | 56.81 | 64.17 | 66.90 | 64.84 | 58.70 | 49.29 | 38.30 | 25.35 | 47.19 | ||||||||||||
2002 | 27.77 | 29.36 | 35.45 | 51.17 | 54.81 | 66.97 | 66.26 | 66.33 | a | 58.80 | 47.39 | 35.93 | 29.61 | 47.49 | ||||||||||||
2003 | 32.84 | 34.00 | 38.84 | 45.03 | 56.42 | 62.00 | 69.47 | a | 67.59 | b | 60.03 | 52.19 | 36.63 | 28.13 | 48.60 | |||||||||||
2004 | 30.61 | 28.45 | 43.39 | 45.97 | 57.19 | 62.80 | 67.58 | 63.52 | 56.80 | 48.23 | a | 35.77 | 28.58 | 47.41 | ||||||||||||
2005 | 33.88 | e | 36.18 | 38.55 | 44.17 | 56.06 | 63.27 | 69.06 | 65.83 | a | 60.70 | 49.13 | 37.00 | 30.52 | 48.70 | |||||||||||
2006 | 29.13 | 33.79 | 38.16 | 48.20 | 59.16 | 65.17 | 67.81 | 64.65 | 55.33 | 47.48 | 37.03 | 26.87 | 47.73 | |||||||||||||
2007 | 26.55 | 33.36 | 40.32 | 44.60 | 53.00 | 63.10 | 66.03 | 67.32 | 60.03 | 48.32 | 39.62 | a | 28.68 | c | 47.58 | |||||||||||
2008 | 27.58 | 32.45 | 37.90 | 43.63 | 53.77 | 65.43 | 66.10 | b | 64.26 | 56.27 | 46.94 | 36.60 | 30.13 | 46.76 | ||||||||||||
2009 | 29.23 | 33.04 | 40.48 | 45.40 | 58.39 | 62.63 | 69.23 | a | 65.03 | 57.23 | 47.52 | 36.73 | 27.27 | a | 47.68 | |||||||||||
2010 | 27.86 | c | 31.75 | 35.10 | 45.17 | 53.16 | 65.80 | 68.03 | 66.29 | 61.83 | 50.19 | 34.27 | 32.29 | 47.64 | ||||||||||||
2011 | 25.52 | 26.32 | 42.84 | 50.03 | 52.39 | 64.70 | 70.74 | 69.61 | 61.17 | 48.74 | 36.37 | 25.42 | 47.82 | |||||||||||||
2012 | 30.55 | 31.32 | a | 39.16 | 49.00 | 54.74 | 67.03 | 68.16 | 67.58 | 59.67 | 50.13 | 39.27 | 29.68 | 48.86 | ||||||||||||
2013 | 25.48 | 29.29 | 40.55 | 47.30 | 55.29 | 67.57 | 66.29 | 66.35 | 60.27 | 46.10 | 36.53 | 28.13 | 47.43 | |||||||||||||
2014 | 28.94 | 38.89 | 40.35 | 46.13 | 53.29 | 67.97 | 68.10 | 64.55 | 62.07 | 51.81 | 35.50 | 31.53 | a | 49.09 | ||||||||||||
2015 | 30.65 | 36.29 | 43.10 | 45.10 | 52.84 | 65.80 | 67.42 | 68.26 | 63.07 | 52.58 | 37.47 | 28.81 | 49.28 | |||||||||||||
2016 | 28.58 | 33.86 | 43.29 | 46.87 | 53.16 | 66.67 | 71.45 | 64.13 | a | 60.57 | 53.68 | 41.60 | 33.26 | 49.76 | ||||||||||||
2017 | 32.16 | 38.07 | 44.35 | 47.23 | 54.07 | a | 66.27 | 68.39 | 66.55 | 61.60 | 50.94 | 44.52 | c | 32.59 | d | 50.56 | ||||||||||
2018 | 30.48 | b | 38.50 | 42.97 | 50.90 | 59.74 | 69.00 | 69.79 | b | 68.35 | 61.30 | 50.58 | 36.00 | 31.68 | 50.77 | |||||||||||
2019 | 30.74 | 32.54 | 41.65 | 48.73 | 53.10 | 63.93 | 71.35 | 70.16 | 63.67 | 47.65 | 37.60 | 31.84 | 49.41 | |||||||||||||
2020 | 31.68 | 34.55 | 42.71 | 50.07 | 60.45 | 64.93 | 72.45 | b | 70.74 | 58.80 | 50.16 | 40.67 | 28.35 | 50.46 | ||||||||||||
2021 | 29.10 | 33.11 | 37.65 | 48.30 | 56.39 | 67.30 | 67.07 | d | 66.26 | 62.13 | 47.85 | e | 40.90 | 34.45 | 49.21 | |||||||||||
2022 | 28.39 | 28.29 | 37.13 | 49.86 | a | 58.03 | 67.59 | a | 70.55 | 66.71 | 59.83 | 48.52 | 33.77 | 31.81 | 48.37 | |||||||||||
2023 | 29.71 | 31.36 | 39.48 | 44.27 | 55.00 | 63.80 | 72.74 | 68.55 | 62.83 | 50.26 | 38.97 | 30.87 | 48.99 | |||||||||||||
2024 | 32.16 | 35.90 | 40.97 | 45.23 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.34 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.39 | 31.82 | 37.91 | 45.05 | 53.85 | 63.28 | 67.08 | 65.12 | 58.90 | 48.01 | 36.12 | 28.49 | 46.99 | |||||||||||||
S.D. | 2.98 | 3.67 | 3.38 | 2.90 | 2.67 | 2.67 | 2.19 | 2.16 | 2.26 | 2.37 | 3.00 | 2.96 | 1.75 | |||||||||||||
SKEW | -0.17 | -0.32 | -0.06 | 0.13 | 0.61 | 0.12 | 0.59 | 0.46 | 0.09 | -0.25 | -0.12 | -0.34 | 0.18 | |||||||||||||
MAX | 33.88 | 39.93 | 44.35 | 51.17 | 60.68 | 69.00 | 72.74 | 70.74 | 63.67 | 53.68 | 44.52 | 35.23 | 50.77 | |||||||||||||
MIN | 20.74 | 21.66 | 30.65 | 39.27 | 48.10 | 58.10 | 63.45 | 61.32 | 54.34 | 41.29 | 27.57 | 20.52 | 43.79 | |||||||||||||
YRS | 60 | 60 | 59 | 58 | 58 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 58 |