YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 33.84 | 26.97 | 28.32 | 29.50 | 36.52 | 46.03 | 47.42 | 47.58 | 46.13 | 41.73 | a | 32.27 | 25.29 | 36.80 | ||||||||||||
1949 | 21.29 | 27.07 | 31.35 | 38.10 | 41.00 | 44.77 | 49.16 | 48.06 | 48.90 | 38.87 | 45.23 | 27.39 | 38.43 | |||||||||||||
1950 | 21.90 | 30.39 | 29.58 | 32.80 | 37.84 | 45.40 | 50.26 | 53.61 | 48.20 | 41.61 | 38.23 | 37.61 | 38.95 | |||||||||||||
1951 | 27.42 | 30.64 | 28.23 | 39.57 | 38.68 | 48.53 | 50.87 | 51.32 | 53.90 | 41.84 | 36.90 | 28.48 | 39.70 | |||||||||||||
1952 | 26.68 | 30.48 | 28.23 | 36.30 | 39.84 | 41.23 | 55.52 | 52.94 | 55.17 | 51.84 | 36.93 | 30.94 | 40.51 | |||||||||||||
1953 | 34.71 | 30.36 | 29.77 | a | 33.13 | 35.52 | 39.67 | 51.55 | 50.74 | 53.53 | 44.13 | 37.50 | 33.74 | 39.53 | ||||||||||||
1954 | 29.10 | 36.52 | a | 31.10 | 36.23 | 41.26 | 41.67 | 49.55 | 46.71 | 46.10 | a | 43.10 | 39.17 | 31.61 | 39.34 | |||||||||||
1955 | 28.23 | 27.11 | 28.84 | 29.30 | 36.71 | 45.67 | 46.68 | 52.00 | 48.30 | 43.58 | 33.63 | 31.81 | 37.65 | |||||||||||||
1956 | 29.39 | 27.07 | 29.48 | 36.47 | 42.58 | 43.00 | 54.16 | 50.10 | 50.17 | 38.81 | 40.86 | b | 32.58 | e | 39.55 | |||||||||||
1957 | 24.77 | 34.79 | 32.35 | 35.63 | 41.61 | 46.63 | 48.23 | 47.16 | 53.93 | 39.39 | 35.67 | 33.39 | 39.46 | |||||||||||||
1958 | 34.00 | 34.96 | 29.10 | 34.40 | 45.35 | 48.27 | 57.52 | 56.81 | 46.87 | 46.84 | 37.40 | 37.61 | 42.43 | |||||||||||||
1959 | 30.32 | 28.36 | 30.52 | 35.60 | 36.26 | 44.73 | 53.16 | 50.39 | 43.43 | 42.32 | 38.90 | a | 31.65 | 38.80 | ||||||||||||
1960 | 27.68 | 27.62 | 34.23 | 33.67 | 35.77 | 48.27 | 55.48 | 49.52 | 50.50 | 43.58 | 32.73 | 35.10 | 39.51 | |||||||||||||
1961 | 37.42 | 31.57 | 30.42 | 32.40 | 36.32 | 49.93 | 53.48 | 55.84 | 44.20 | 41.19 | 33.37 | 30.19 | 39.70 | |||||||||||||
1962 | 29.97 | a | 29.35 | b | 29.77 | 36.23 | 34.94 | 43.60 | 51.81 | 50.23 | 50.93 | 43.68 | 36.40 | 36.87 | 39.48 | |||||||||||
1963 | 30.21 | b | 39.18 | 30.29 | 29.97 | 40.42 | 43.23 | 45.94 | 51.39 | 52.07 | 40.77 | 35.27 | 36.65 | 39.61 | ||||||||||||
1964 | 28.65 | 30.93 | 28.45 | 29.17 | 36.42 | 42.30 | 49.52 | 49.45 | 45.57 | 45.15 | d | 32.63 | 29.32 | 37.30 | ||||||||||||
1965 | 32.26 | 31.04 | 33.84 | 33.50 | 35.90 | 42.93 | 52.71 | 51.26 | 46.70 | 48.74 | 36.07 | 28.26 | 39.43 | |||||||||||||
1966 | 29.29 | 28.07 | 31.97 | 37.00 | 38.39 | 42.37 | 47.55 | 51.45 | 49.30 | 42.77 | 36.47 | 31.97 | 38.88 | |||||||||||||
1967 | 29.48 | 33.54 | 28.52 | 27.27 | 40.61 | 48.07 | 52.71 | 59.45 | 51.97 | 42.03 | 38.40 | 27.52 | 39.96 | |||||||||||||
1968 | 28.35 | 38.24 | 32.10 | 30.53 | 36.90 | 46.13 | 53.10 | 51.13 | 51.00 | 41.29 | 35.23 | 26.77 | 39.23 | |||||||||||||
1969 | 25.23 | 26.93 | 31.93 | a | 32.17 | 45.06 | 49.13 | 50.35 | 49.68 | 49.67 | 40.10 | 41.27 | 34.13 | 39.64 | ||||||||||||
1970 | 33.06 | 36.04 | 32.00 | 29.73 | 39.48 | 49.67 | 53.68 | 53.71 | 46.53 | 41.53 | a | 36.23 | 28.06 | 39.98 | ||||||||||||
1971 | 29.57 | a | 30.61 | 28.48 | 31.67 | 37.97 | 42.50 | 54.35 | 54.65 | 47.07 | 39.65 | 33.70 | 25.68 | 37.99 | ||||||||||||
1972 | 27.32 | 31.93 | 35.45 | 28.93 | 41.29 | 45.97 | 55.94 | 54.81 | 46.63 | 41.23 | 34.80 | 25.10 | 39.12 | |||||||||||||
1973 | 27.58 | 33.68 | 28.58 | 34.73 | 42.19 | 44.30 | 52.32 | 49.74 | 48.43 | 39.26 | 30.40 | 30.97 | 38.52 | |||||||||||||
1974 | 25.45 | 27.75 | 30.03 | 30.37 | 35.19 | 46.00 | 50.03 | 52.94 | 56.80 | 42.93 | a | 33.77 | 28.97 | 38.35 | ||||||||||||
1975 | 31.06 | 29.75 | 28.55 | 28.93 | 40.97 | 44.63 | 52.52 | 49.71 | 55.07 | 38.84 | 32.00 | 33.42 | 38.79 | |||||||||||||
1976 | 34.77 | 29.66 | 28.03 | 31.57 | 38.10 | 42.13 | 52.97 | 50.94 | 50.57 | 47.39 | 43.62 | a | 36.93 | b | 40.56 | |||||||||||
1977 | 34.35 | 37.00 | 28.35 | 37.17 | 35.19 | 49.07 | 49.48 | 59.00 | 45.63 | 42.00 | 32.67 | 32.81 | 40.23 | |||||||||||||
1978 | 33.90 | 33.04 | 37.39 | 32.07 | 37.29 | 46.77 | 52.87 | 51.16 | 44.47 | 47.26 | 32.53 | 26.35 | 39.59 | |||||||||||||
1979 | 30.00 | 30.96 | 36.52 | 34.97 | 41.39 | 46.40 | 52.13 | 50.48 | 52.53 | 45.65 | 37.03 | 35.26 | 41.11 | |||||||||||||
1980 | 30.94 | 35.97 | 29.90 | 35.47 | 38.77 | 41.33 | 52.16 | 49.13 | 49.97 | 46.71 | 37.73 | 38.21 | b | 40.52 | ||||||||||||
1981 | 37.74 | 34.39 | 33.16 | 35.60 | 38.61 | 44.90 | 49.58 | 55.16 | 50.03 | 41.71 | 36.90 | 32.68 | 40.87 | |||||||||||||
1982 | 28.84 | 31.96 | 30.84 | 33.07 | 38.58 | 47.10 | 50.23 | 51.97 | 44.90 | 41.87 | 33.70 | 32.13 | 38.77 | |||||||||||||
1983 | 34.84 | 33.04 | 34.10 | 32.47 | 40.61 | 42.83 | 46.87 | 51.81 | 46.53 | 44.90 | 33.53 | 30.13 | 39.31 | |||||||||||||
1984 | 35.81 | 33.52 | 34.35 | 31.55 | a | 38.32 | 42.53 | 51.97 | 51.16 | 48.67 | 38.23 | 32.53 | 29.19 | 38.99 | ||||||||||||
1985 | 34.81 | 30.32 | 29.71 | 39.67 | 38.35 | 48.17 | 56.10 | 51.13 | 45.43 | 40.19 | 27.67 | 39.35 | 40.07 | |||||||||||||
1986 | 37.03 | 35.75 | 37.35 | 33.43 | 40.26 | 49.63 | 47.87 | 56.94 | 43.67 | 46.19 | 37.53 | 35.06 | 41.73 | |||||||||||||
1987 | 30.45 | 33.46 | 33.39 | 39.87 | 43.52 | 49.03 | 48.00 | 54.42 | 52.43 | 51.65 | 36.57 | 28.35 | 41.76 | |||||||||||||
1988 | 31.77 | 36.79 | 32.61 | 37.23 | 37.32 | 44.67 | 53.77 | 52.84 | 50.97 | 50.97 | 34.07 | 33.45 | 41.37 | |||||||||||||
1989 | 29.65 | 25.07 | 31.48 | 40.73 | 39.53 | a | 47.53 | 47.06 | 49.50 | a | 51.00 | 42.77 | 39.47 | 38.81 | 40.22 | |||||||||||
1990 | 31.35 | 29.75 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.08 | f | 35.07 | 25.19 | 30.34 | h | ||||
1991 | 34.26 | 39.68 | 30.16 | 33.40 | 36.97 | 41.53 | 53.35 | 53.87 | 56.73 | 48.74 | 39.53 | 36.00 | 42.02 | |||||||||||||
1992 | 35.77 | 39.07 | 39.97 | 40.50 | 48.39 | 50.17 | 52.68 | 55.68 | 48.30 | 44.48 | 36.03 | ----- | z | 44.64 | a | |||||||||||
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 | 56.53 | a | 54.94 | 48.13 | 42.48 | 37.20 | 32.71 | 45.33 | f | |||||
1997 | 31.68 | 31.82 | 33.13 | 34.17 | 46.19 | 43.40 | 50.97 | a | 53.61 | 49.75 | b | 40.68 | 38.10 | 32.35 | 40.49 | |||||||||||
1998 | 33.19 | 30.68 | 33.48 | 35.97 | 37.13 | 45.10 | 55.55 | 54.94 | 53.20 | 41.23 | 33.83 | 28.68 | 40.25 | |||||||||||||
1999 | 33.04 | c | 28.93 | 29.55 | 33.90 | 36.97 | 42.93 | 51.00 | 53.19 | 52.77 | 46.29 | 39.00 | 35.32 | 40.24 | ||||||||||||
2000 | 30.61 | 34.34 | 31.23 | 37.97 | 39.84 | 49.13 | 50.39 | 51.77 | 49.83 | 42.29 | 33.60 | 36.26 | 40.61 | |||||||||||||
2001 | 33.48 | 30.46 | 34.68 | 32.47 | 44.74 | 43.53 | 51.29 | 54.55 | 52.47 | 44.16 | 37.17 | 31.45 | 40.87 | |||||||||||||
2002 | 29.48 | 33.43 | 31.23 | 36.43 | 38.55 | 46.87 | 54.10 | 53.00 | 51.37 | 43.74 | 41.33 | 34.35 | 41.16 | |||||||||||||
2003 | 40.06 | 32.57 | 34.19 | 32.03 | 39.90 | 49.17 | 55.84 | 53.74 | 53.77 | 45.29 | 32.87 | 32.29 | 41.81 | |||||||||||||
2004 | 32.67 | a | 32.31 | 38.52 | 38.30 | 41.26 | 47.60 | 54.94 | 55.61 | 47.40 | 43.03 | 35.60 | 35.61 | 41.90 | ||||||||||||
2005 | 34.19 | 35.36 | 37.00 | 34.50 | 42.42 | 43.10 | 55.58 | 56.94 | 48.37 | 42.00 | 37.50 | 34.58 | 41.79 | |||||||||||||
2006 | 32.23 | 32.57 | 28.58 | 34.93 | 42.94 | 50.10 | 55.68 | 52.48 | 52.07 | 43.00 | 34.80 | 33.16 | 41.04 | |||||||||||||
2007 | 30.68 | 33.29 | 36.13 | 35.50 | 41.61 | 44.87 | 53.42 | 51.61 | 47.33 | 39.77 | 37.70 | 28.84 | 40.06 | |||||||||||||
2008 | 27.45 | 32.00 | 29.84 | 31.47 | 41.55 | 44.97 | 53.77 | 54.19 | 53.80 | 44.58 | 41.00 | 30.13 | 40.40 | |||||||||||||
2009 | 36.94 | 32.68 | 29.90 | 34.07 | 43.06 | 46.57 | 56.77 | 53.84 | 51.93 | 41.16 | 35.03 | 30.81 | 41.06 | |||||||||||||
2010 | 35.97 | 34.96 | 31.81 | 32.17 | 36.16 | 44.20 | 54.03 | 53.23 | 51.03 | 42.45 | 34.13 | 31.16 | 40.11 | |||||||||||||
2011 | 34.71 | 29.11 | 30.42 | 30.23 | 34.68 | 43.60 | 48.90 | 53.58 | 54.97 | 43.19 | 32.90 | 32.61 | 39.08 | |||||||||||||
2012 | 32.32 | 30.38 | 28.94 | 35.93 | 40.00 | 42.07 | 51.23 | 56.26 | 54.13 | 43.81 | 37.13 | 28.92 | e | 40.09 | ||||||||||||
2013 | 31.42 | 30.32 | 34.26 | 36.37 | 41.42 | 47.40 | 56.03 | 54.19 | 48.80 | 43.39 | 37.80 | 32.58 | 41.16 | |||||||||||||
2014 | 39.23 | 33.68 | 34.68 | 36.60 | 42.39 | 45.13 | 56.74 | 55.87 | 53.27 | 47.39 | 37.67 | 34.97 | 43.13 | |||||||||||||
2015 | 40.84 | 38.64 | 39.00 | 34.70 | 43.06 | 52.77 | 56.68 | 54.90 | 49.13 | 49.16 | 33.23 | 29.97 | 43.51 | |||||||||||||
2016 | 31.35 | 36.52 | 33.84 | 40.10 | 42.97 | 48.20 | 50.77 | 55.87 | 48.57 | 41.10 | 37.57 | 27.06 | 41.16 | |||||||||||||
2017 | 28.87 | 31.50 | 34.29 | 33.50 | 41.87 | 47.90 | 54.16 | 59.81 | 52.28 | a | 42.97 | 34.90 | 35.68 | 41.48 | ||||||||||||
2018 | 35.13 | 30.07 | 31.84 | 35.77 | 43.71 | 45.87 | 57.48 | 55.65 | 49.10 | a | 46.00 | 39.97 | 31.74 | 41.86 | ||||||||||||
2019 | 36.16 | 25.43 | 32.81 | 38.03 | 42.81 | 48.00 | 51.39 | 55.58 | 47.90 | 40.26 | 41.77 | 33.81 | 41.16 | |||||||||||||
2020 | 32.84 | 31.62 | 31.24 | b | 38.07 | 42.10 | 45.70 | 53.87 | 55.06 | 56.90 | 48.35 | 35.90 | 33.77 | 42.12 | ||||||||||||
2021 | 32.74 | 30.00 | 30.06 | 38.00 | 40.90 | 51.60 | 56.71 | 55.32 | 51.27 | 40.48 | 38.80 | 30.45 | 41.36 | |||||||||||||
2022 | 36.42 | 34.86 | 34.03 | 31.67 | 37.33 | a | 47.33 | 56.19 | 58.16 | 52.90 | 50.71 | 32.57 | 31.84 | 42.00 | ||||||||||||
2023 | 30.68 | 28.50 | 27.32 | 33.87 | 44.29 | 47.57 | 54.26 | 57.42 | 49.18 | b | 45.39 | 38.13 | ----- | z | 41.51 | a | ||||||||||
2024 | 34.89 | c | 32.61 | f | 32.70 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.89 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.78 | 32.03 | 31.84 | 34.35 | 39.89 | 45.82 | 52.46 | 53.10 | 50.01 | 43.50 | 36.23 | 32.00 | 40.20 | |||||||||||||
S.D. | 3.90 | 3.40 | 2.96 | 3.16 | 3.04 | 2.81 | 2.98 | 2.91 | 3.28 | 3.23 | 3.10 | 3.49 | 1.35 | |||||||||||||
SKEW | -0.17 | 0.26 | 0.74 | -0.00 | 0.31 | 0.10 | -0.27 | 0.06 | 0.06 | 0.77 | 0.24 | -0.05 | -0.01 | |||||||||||||
MAX | 40.84 | 39.68 | 39.97 | 40.73 | 48.39 | 52.77 | 57.52 | 59.81 | 56.90 | 51.84 | 45.23 | 39.35 | 43.51 | |||||||||||||
MIN | 21.29 | 25.07 | 27.32 | 27.27 | 34.68 | 39.67 | 45.94 | 46.71 | 43.43 | 38.23 | 27.67 | 25.10 | 36.80 | |||||||||||||
YRS | 73 | 72 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 73 | 71 | 69 |