| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 92.06 | 90.35 | 82.70 | ----- | z | 51.20 | 39.45 | 71.15 | g | |||||
| 1949 | 22.84 | 40.07 | 53.48 | 72.10 | 72.90 | 84.63 | 94.58 | 90.71 | 85.33 | 65.90 | 63.07 | 43.77 | 65.78 | |||||||||||||
| 1950 | 42.74 | 54.96 | 55.97 | 67.87 | 75.26 | 83.00 | 94.81 | 93.71 | 80.41 | c | 73.45 | 59.30 | 47.55 | 69.09 | ||||||||||||
| 1951 | 46.06 | 51.39 | 56.65 | 71.13 | 74.39 | 85.20 | 94.71 | 90.23 | 87.50 | 67.45 | 55.53 | 41.03 | 68.44 | |||||||||||||
| 1952 | 42.65 | 51.48 | 49.13 | 69.43 | 76.29 | 78.60 | 93.84 | 92.16 | 86.00 | 81.16 | 55.03 | 47.26 | 68.59 | |||||||||||||
| 1953 | 53.23 | 53.46 | 59.65 | 65.63 | 66.71 | 79.87 | 97.26 | 90.39 | 89.83 | 72.74 | 61.03 | 48.65 | 69.87 | |||||||||||||
| 1954 | 50.03 | 58.79 | 55.45 | 72.33 | 81.68 | 81.00 | 95.71 | 88.71 | 84.53 | 75.32 | 61.93 | 46.00 | 70.96 | |||||||||||||
| 1955 | 41.23 | 48.39 | 56.48 | 61.03 | 73.94 | 86.07 | 91.00 | 96.48 | 83.67 | 75.97 | 52.43 | 45.90 | 67.72 | |||||||||||||
| 1956 | 44.45 | 42.52 | 58.94 | 66.83 | 74.65 | 86.30 | 95.45 | 90.55 | 85.73 | 65.90 | 53.53 | 46.52 | 67.61 | |||||||||||||
| 1957 | 39.00 | 55.71 | 58.10 | 65.53 | 72.84 | 89.07 | 95.39 | 92.58 | 85.70 | 63.32 | 49.13 | 47.65 | 67.83 | |||||||||||||
| 1958 | 47.48 | 55.64 | 52.55 | 63.50 | 83.13 | 84.10 | 93.61 | 97.52 | 84.40 | 76.26 | 58.80 | 53.35 | 70.86 | |||||||||||||
| 1959 | 49.39 | 49.29 | 61.77 | 71.90 | 69.45 | 89.40 | 97.74 | 91.84 | 77.97 | 72.35 | 58.20 | 44.39 | 69.47 | |||||||||||||
| 1960 | 40.97 | 46.28 | 62.90 | 67.27 | 74.39 | 91.57 | 97.77 | 92.26 | 86.27 | 70.06 | 51.53 | 45.77 | 68.92 | |||||||||||||
| 1961 | 48.45 | 52.46 | 56.87 | 66.80 | 72.84 | 93.20 | 96.61 | 92.77 | 76.73 | 68.03 | 49.27 | 42.61 | 68.05 | |||||||||||||
| 1962 | 37.77 | 42.68 | 51.35 | 72.20 | 70.10 | 85.47 | 92.65 | 90.90 | 84.87 | 73.00 | 57.37 | 47.61 | 67.16 | |||||||||||||
| 1963 | 41.48 | 57.82 | 54.84 | 57.70 | 75.10 | 76.40 | 91.23 | 91.23 | 84.63 | 72.61 | 53.47 | 44.29 | 66.73 | |||||||||||||
| 1964 | 43.06 | 48.34 | 53.77 | 62.83 | 70.71 | 78.87 | 94.39 | 89.61 | 79.93 | 75.00 | 49.83 | 45.39 | 65.98 | |||||||||||||
| 1965 | 44.10 | 52.61 | 57.16 | 64.77 | 69.65 | 80.83 | 91.87 | 86.87 | 75.90 | 75.39 | 54.70 | 42.39 | 66.35 | |||||||||||||
| 1966 | 44.45 | 45.96 | 61.90 | 70.07 | 82.13 | 84.77 | 92.94 | 93.94 | 83.40 | 70.61 | 57.07 | 40.23 | 68.95 | |||||||||||||
| 1967 | 45.81 | 53.32 | 55.32 | 52.17 | 74.97 | 79.57 | 95.06 | 96.42 | 84.63 | 71.77 | 56.93 | 40.94 | 67.24 | |||||||||||||
| 1968 | 46.26 | 54.90 | 60.16 | 62.63 | 73.77 | 85.50 | 96.48 | 83.68 | 81.60 | 69.23 | 49.70 | 40.68 | 67.05 | |||||||||||||
| 1969 | 45.55 | 42.46 | 53.26 | 65.67 | 79.77 | 80.70 | 93.97 | 95.32 | 85.73 | 61.00 | 55.33 | 45.19 | 67.00 | |||||||||||||
| 1970 | 45.58 | 56.79 | 56.03 | 58.43 | 75.26 | 82.83 | 94.58 | 97.00 | 79.47 | 66.03 | 55.20 | 40.13 | 67.28 | |||||||||||||
| 1971 | 46.65 | 51.25 | 56.03 | 63.53 | 69.35 | 82.83 | 95.35 | 95.32 | 77.57 | 63.61 | 51.77 | 37.32 | 65.88 | |||||||||||||
| 1972 | 37.84 | 52.38 | 64.77 | 64.13 | 78.65 | 87.20 | 95.52 | 92.52 | 78.53 | 65.13 | 49.00 | 35.77 | 66.79 | |||||||||||||
| 1973 | 35.52 | 48.68 | 51.03 | 62.43 | 79.65 | 86.70 | 94.71 | 90.84 | 80.50 | 67.45 | 51.50 | 46.45 | 66.29 | |||||||||||||
| 1974 | 41.29 | 48.89 | 57.94 | 61.57 | 76.42 | 89.70 | 91.68 | 90.74 | 86.53 | 68.39 | 53.80 | 40.81 | 67.31 | |||||||||||||
| 1975 | 42.39 | 47.46 | 52.26 | 54.37 | 73.00 | 82.97 | 94.84 | 87.77 | 85.27 | 66.00 | 51.83 | 46.65 | 65.40 | |||||||||||||
| 1976 | 45.77 | 50.21 | 55.81 | 63.13 | 79.87 | 83.17 | 92.97 | 82.61 | 80.43 | 68.68 | 58.90 | 45.52 | 67.26 | |||||||||||||
| 1977 | 41.58 | 55.36 | 53.29 | 71.13 | 65.65 | 87.93 | 92.84 | 91.68 | 81.03 | 72.48 | 56.70 | 49.52 | 68.27 | |||||||||||||
| 1978 | 45.61 | 50.18 | 62.00 | 60.87 | 71.81 | 84.23 | 95.06 | 91.81 | 76.63 | 74.68 | 49.30 | 33.77 | 66.33 | |||||||||||||
| 1979 | 36.03 | 47.86 | 58.35 | 64.57 | 76.68 | 86.73 | 94.29 | 89.19 | 88.27 | 72.74 | 51.07 | 47.68 | 67.79 | |||||||||||||
| 1980 | 42.58 | 53.62 | 53.65 | 67.80 | 72.06 | 80.30 | 93.97 | 90.16 | 81.60 | 71.13 | 55.90 | 48.65 | 67.62 | |||||||||||||
| 1981 | 49.77 | 53.86 | 57.74 | 70.43 | 73.48 | 89.40 | 95.77 | 96.48 | 86.10 | 64.61 | 55.90 | 49.58 | 70.26 | |||||||||||||
| 1982 | 30.97 | 49.71 | 53.48 | 63.13 | 74.87 | 82.48 | a | 91.48 | 93.68 | 76.80 | 64.84 | 49.47 | 41.19 | 64.34 | ||||||||||||
| 1983 | 47.40 | f | 53.65 | h | 55.35 | h | 60.71 | i | 74.32 | i | 81.95 | h | 88.38 | j | 88.52 | h | 81.95 | h | 71.19 | j | 51.25 | j | 44.59 | d | 44.59 | k |
| 1984 | 35.13 | 48.63 | b | 58.40 | a | 62.03 | a | 71.44 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.05 | h | |
| 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 | 67.10 | 74.48 | 86.57 | 98.32 | 94.61 | 83.27 | 79.10 | 53.43 | 41.90 | 75.42 | c | |||||||||
| 1989 | 38.32 | 40.71 | 60.45 | 73.10 | 74.53 | a | 86.37 | 97.00 | 88.74 | 81.93 | 67.94 | 56.43 | 48.61 | 67.85 | ||||||||||||
| 1990 | 46.48 | 46.54 | 61.35 | 70.57 | 71.06 | 85.73 | 95.19 | 91.42 | 85.77 | 72.03 | 54.83 | 35.06 | 68.00 | |||||||||||||
| 1991 | 39.23 | 58.39 | 53.10 | 62.33 | 68.45 | 83.33 | 97.06 | 92.71 | 85.20 | 73.42 | 54.57 | 44.16 | 67.66 | |||||||||||||
| 1992 | 45.35 | 55.55 | 62.81 | 74.00 | 84.68 | 85.37 | 92.55 | 94.13 | 84.87 | 72.65 | 52.57 | 41.35 | 70.49 | |||||||||||||
| 1993 | 32.84 | 41.57 | 62.48 | 64.63 | 78.94 | 79.73 | 88.35 | 89.87 | 84.53 | 68.81 | 50.70 | 43.16 | 65.47 | |||||||||||||
| 1994 | 48.81 | 50.07 | 64.03 | 67.40 | 77.00 | 89.30 | 98.26 | 97.00 | h | ----- | z | 66.00 | i | 44.10 | 41.32 | 64.48 | c | |||||||||
| 1995 | 45.74 | 59.75 | 56.26 | 62.27 | 69.03 | 78.57 | 91.52 | 92.52 | 85.17 | 71.48 | 62.70 | 48.61 | 68.63 | |||||||||||||
| 1996 | 47.00 | 51.66 | 60.10 | 67.30 | 74.06 | 86.53 | 96.94 | 94.58 | 81.37 | 68.35 | 55.60 | 46.97 | 69.20 | |||||||||||||
| 1997 | 44.00 | 49.82 | 63.97 | 64.27 | 81.94 | 81.63 | 91.16 | 93.61 | 83.60 | 68.94 | 56.70 | 41.68 | 68.44 | |||||||||||||
| 1998 | 47.26 | 46.82 | 56.52 | 61.67 | 64.97 | 79.10 | 95.48 | 95.16 | 79.77 | 63.90 | 52.53 | 41.13 | 65.36 | |||||||||||||
| 1999 | 47.68 | 52.14 | 58.87 | 60.53 | 74.55 | 85.30 | 94.32 | 90.29 | 84.50 | 74.81 | 62.27 | 47.45 | 69.39 | |||||||||||||
| 2000 | 48.87 | 52.83 | 59.32 | 71.73 | 77.84 | 90.63 | 94.90 | 94.23 | 82.10 | 66.71 | 48.07 | 45.84 | 69.42 | |||||||||||||
| 2001 | 41.10 | 45.75 | 61.06 | 63.27 | 83.87 | 87.50 | 93.13 | 96.16 | 85.60 | 73.06 | 55.80 | 47.74 | 69.50 | |||||||||||||
| 2002 | 43.03 | 52.32 | 56.39 | 68.13 | 75.68 | 88.33 | 98.48 | 91.87 | 84.43 | 67.94 | 54.20 | 47.58 | 69.03 | |||||||||||||
| 2003 | 53.00 | 48.07 | 60.61 | 59.53 | 76.65 | 89.80 | 99.61 | 92.10 | 85.87 | 76.00 | 49.17 | 44.16 | 69.55 | |||||||||||||
| 2004 | 44.00 | 47.62 | 67.06 | 68.77 | 77.06 | 88.13 | 96.55 | 91.29 | 82.97 | 65.90 | 50.03 | 41.20 | a | 68.38 | ||||||||||||
| 2005 | 34.16 | 45.82 | 61.97 | 66.50 | 75.61 | 82.90 | 101.48 | 97.42 | 83.27 | 71.68 | 58.60 | 44.94 | 68.70 | |||||||||||||
| 2006 | 47.68 | 53.68 | 53.13 | 66.20 | 79.48 | 91.47 | 100.26 | 94.23 | 84.93 | 70.32 | 55.63 | 45.00 | 70.17 | |||||||||||||
| 2007 | 43.03 | 54.54 | 67.81 | 69.67 | 82.16 | 91.83 | 102.32 | 97.10 | 83.77 | 69.42 | 58.67 | 43.10 | 71.95 | |||||||||||||
| 2008 | 40.48 | 52.62 | 60.10 | 67.40 | 76.55 | 89.20 | 100.10 | 98.58 | 88.63 | 73.42 | 60.43 | 44.71 | 71.02 | |||||||||||||
| 2009 | 48.68 | 54.25 | 60.16 | 67.77 | 84.58 | 84.73 | 100.26 | 95.00 | 91.90 | 68.39 | 58.60 | 36.20 | a | 70.88 | ||||||||||||
| 2010 | 44.71 | 53.29 | 59.97 | 64.43 | 69.06 | 87.37 | 99.55 | 94.39 | 88.60 | 71.19 | 54.07 | 48.23 | 69.57 | |||||||||||||
| 2011 | 47.97 | 50.18 | 59.03 | 64.73 | 72.58 | 84.60 | 97.68 | 97.45 | 91.17 | 73.45 | 53.80 | 47.00 | 69.97 | |||||||||||||
| 2012 | 51.32 | 52.38 | 62.90 | 71.17 | 81.00 | 89.60 | 99.13 | 99.55 | 89.97 | 71.77 | 58.17 | 42.58 | 72.46 | |||||||||||||
| 2013 | 34.68 | 50.18 | 61.90 | 67.70 | 76.19 | 89.87 | 99.23 | 92.58 | 82.63 | 65.74 | 54.67 | 36.26 | 67.64 | |||||||||||||
| 2014 | 50.42 | 54.86 | 60.23 | 67.63 | 76.94 | 87.33 | 98.00 | 89.77 | 84.73 | 73.71 | 55.30 | 48.23 | 70.60 | |||||||||||||
| 2015 | 50.61 | 57.75 | 66.03 | 66.57 | 73.16 | 91.63 | 90.87 | 93.00 | 85.57 | 73.13 | 49.07 | 43.74 | 70.09 | |||||||||||||
| 2016 | 43.55 | 56.07 | 61.45 | 70.40 | 74.90 | 92.03 | 96.81 | 95.65 | 82.77 | 68.13 | 57.67 | 41.32 | 70.06 | |||||||||||||
| 2017 | 38.32 | 49.93 | 61.48 | 63.10 | 76.35 | 87.30 | 97.06 | 94.13 | 80.30 | 66.87 | 57.80 | 44.63 | a | 68.11 | ||||||||||||
| 2018 | 51.10 | 47.68 | 54.35 | 66.37 | 75.55 | 88.07 | 98.71 | 94.23 | 84.67 | 66.90 | 53.47 | 40.90 | 68.50 | |||||||||||||
| 2019 | 45.81 | 43.46 | 53.19 | 66.93 | 69.29 | 85.57 | 94.30 | a | 94.83 | b | 80.93 | 64.58 | 57.43 | 44.42 | 66.73 | |||||||||||
| 2020 | 50.06 | 55.55 | 58.55 | 68.33 | 77.69 | b | 86.60 | 97.29 | 97.42 | 87.77 | 74.29 | 56.48 | e | 44.80 | a | 71.24 | ||||||||||
| 2021 | 47.33 | a | 50.79 | 56.39 | 69.77 | 77.16 | 95.80 | 100.77 | 95.39 | c | 87.07 | 66.00 | 58.40 | 43.68 | 70.71 | |||||||||||
| 2022 | 47.58 | 51.11 | 60.58 | 65.03 | 73.27 | a | 87.10 | 98.68 | 96.55 | 87.93 | 77.50 | g | 47.43 | 42.55 | 68.89 | a | ||||||||||
| 2023 | 39.74 | 46.93 | 49.10 | 65.27 | 75.45 | 80.03 | 97.71 | 90.26 | 79.90 | 68.39 | 54.10 | 49.23 | 66.34 | |||||||||||||
| 2024 | 47.55 | 49.45 | 54.90 | 65.90 | 74.71 | 91.27 | 98.81 | 91.68 | 84.90 | 74.28 | b | 51.23 | 48.71 | 69.45 | ||||||||||||
| 2025 | 45.19 | 54.29 | 57.55 | 67.63 | 81.43 | h | 90.41 | a | 95.55 | b | 93.35 | 84.53 | 67.19 | 59.33 | 53.20 | u | 71.50 | b | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 43.84 | 50.80 | 58.08 | 65.92 | 75.18 | 85.79 | 95.69 | 92.83 | 83.79 | 70.17 | 54.64 | 44.14 | 68.40 | |||||||||||||
| S.D. | 5.50 | 4.47 | 4.13 | 4.24 | 4.36 | 4.10 | 2.89 | 3.20 | 3.47 | 4.06 | 3.99 | 3.84 | 1.76 | |||||||||||||
| SKEW | -1.06 | -0.36 | 0.04 | -0.60 | 0.06 | -0.11 | 0.01 | -0.53 | -0.20 | 0.15 | -0.08 | -0.52 | 0.03 | |||||||||||||
| MAX | 53.23 | 59.75 | 67.81 | 74.00 | 84.68 | 95.80 | 102.32 | 99.55 | 91.90 | 81.16 | 63.07 | 53.35 | 72.46 | |||||||||||||
| MIN | 22.84 | 40.07 | 49.10 | 52.17 | 64.97 | 76.40 | 88.35 | 82.61 | 75.90 | 61.00 | 44.10 | 33.77 | 64.34 | |||||||||||||
| YRS | 72 | 72 | 72 | 73 | 71 | 72 | 73 | 72 | 72 | 70 | 73 | 73 | 68 | |||||||||||||