LEWISTON WSO AP, IDAHO

Monthly Extreme Maximum Temperature (Degrees Fahrenheit)

(105241)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 94.00 a 95.00 78.00 56.00 46.00 95.00
1949 40.00 54.00 62.00 82.00 92.00 95.00 105.00 103.00 97.00 69.00 65.00 56.00 105.00
1950 53.00 58.00 57.00 70.00 85.00 93.00 100.00 100.00 103.00 79.00 71.00 56.00 103.00
1951 55.00 56.00 64.00 80.00 90.00 92.00 104.00 101.00 90.00 81.00 57.00 53.00 104.00
1952 48.00 57.00 71.00 87.00 86.00 93.00 102.00 100.00 92.00 85.00 63.00 53.00 102.00
1953 66.00 61.00 73.00 79.00 86.00 82.00 101.00 104.00 99.00 80.00 63.00 53.00 104.00
1954 52.00 62.00 65.00 80.00 94.00 90.00 99.00 97.00 91.00 79.00 62.00 54.00 99.00
1955 45.00 55.00 62.00 74.00 83.00 99.00 106.00 98.00 99.00 73.00 63.00 57.00 106.00
1956 57.00 60.00 67.00 85.00 89.00 91.00 102.00 104.00 88.00 77.00 56.00 60.00 104.00
1957 44.00 65.00 64.00 84.00 90.00 93.00 98.00 94.00 93.00 70.00 55.00 55.00 98.00
1958 57.00 64.00 64.00 74.00 95.00 99.00 103.00 103.00 97.00 82.00 61.00 60.00 103.00
1959 62.00 55.00 62.00 76.00 88.00 94.00 109.00 100.00 92.00 73.00 66.00 57.00 109.00
1960 53.00 56.00 76.00 76.00 86.00 92.00 108.00 101.00 91.00 80.00 66.00 52.00 108.00
1961 54.00 59.00 67.00 76.00 92.00 102.00 103.00 115.00 85.00 80.00 56.00 52.00 115.00
1962 60.00 59.00 67.00 84.00 75.00 97.00 101.00 101.00 92.00 82.00 66.00 54.00 101.00
1963 51.00 59.00 71.00 78.00 88.00 96.00 95.00 99.00 96.00 83.00 64.00 53.00 99.00
1964 58.00 53.00 76.00 72.00 90.00 91.00 105.00 96.00 90.00 80.00 60.00 57.00 105.00
1965 53.00 64.00 73.00 78.00 86.00 91.00 102.00 104.00 87.00 82.00 64.00 63.00 104.00
1966 52.00 57.00 74.00 76.00 96.00 93.00 98.00 106.00 99.00 80.00 62.00 52.00 106.00
1967 58.00 63.00 64.00 68.00 88.00 95.00 110.00 106.00 101.00 77.00 62.00 52.00 110.00
1968 58.00 66.00 68.00 85.00 88.00 93.00 105.00 98.00 94.00 72.00 59.00 62.00 105.00
1969 45.00 50.00 70.00 79.00 88.00 95.00 97.00 103.00 96.00 74.00 58.00 53.00 103.00
1970 54.00 56.00 62.00 69.00 91.00 100.00 103.00 103.00 86.00 85.00 61.00 50.00 103.00
1971 63.00 61.00 63.00 76.00 90.00 95.00 103.00 106.00 91.00 85.00 55.00 55.00 106.00
1972 54.00 65.00 73.00 78.00 93.00 96.00 100.00 106.00 91.00 78.00 61.00 60.00 106.00
1973 57.00 61.00 68.00 77.00 94.00 107.00 103.00 104.00 101.00 75.00 62.00 57.00 107.00
1974 56.00 56.00 71.00 76.00 80.00 100.00 102.00 102.00 92.00 82.00 67.00 58.00 102.00
1975 57.00 57.00 61.00 68.00 86.00 88.00 106.00 98.00 91.00 89.00 74.00 61.00 106.00
1976 57.00 60.00 68.00 78.00 89.00 100.00 99.00 98.00 100.00 85.00 64.00 56.00 100.00
1977 55.00 66.00 68.00 97.00 86.00 96.00 101.00 106.00 88.00 70.00 58.00 60.00 106.00
1978 49.00 58.00 74.00 71.00 80.00 96.00 105.00 105.00 93.00 77.00 68.00 53.00 105.00
1979 40.00 56.00 70.00 75.00 88.00 98.00 106.00 100.00 98.00 83.00 59.00 61.00 106.00
1980 50.00 59.00 61.00 87.00 90.00 89.00 107.00 96.00 90.00 89.00 70.00 62.00 107.00
1981 54.00 63.00 72.00 87.00 86.00 91.00 99.00 105.00 99.00 76.00 68.00 56.00 105.00
1982 53.00 64.00 65.00 76.00 86.00 99.00 102.00 105.00 98.00 77.00 60.00 61.00 105.00
1983 60.00 61.00 63.00 78.00 100.00 93.00 101.00 105.00 86.00 76.00 67.00 53.00 105.00
1984 58.00 59.00 66.00 84.00 92.00 97.00 109.00 105.00 93.00 85.00 63.00 46.00 109.00
1985 44.00 57.00 66.00 82.00 96.00 98.00 107.00 96.00 82.00 74.00 58.00 49.00 107.00
1986 55.00 72.00 73.00 82.00 99.00 97.00 98.00 103.00 89.00 79.00 58.00 50.00 103.00
1987 50.00 60.00 70.00 93.00 93.00 99.00 100.00 101.00 100.00 89.00 64.00 57.00 101.00
1988 52.00 65.00 66.00 81.00 96.00 98.00 103.00 104.00 100.00 85.00 64.00 57.00 104.00
1989 56.00 52.00 68.00 80.00 85.00 91.00 100.00 102.00 90.00 79.00 70.00 60.00 102.00
1990 62.00 64.00 72.00 79.00 92.00 96.00 106.00 107.00 99.00 82.00 68.00 59.00 107.00
1991 57.00 60.00 76.00 77.00 75.00 87.00 99.00 100.00 92.00 84.00 56.00 51.00 100.00
1992 57.00 58.00 73.00 80.00 93.00 103.00 104.00 104.00 92.00 85.00 59.00 51.00 104.00
1993 52.00 54.00 67.00 68.00 95.00 93.00 97.00 96.00 94.00 82.00 62.00 54.00 97.00
1994 56.00 57.00 74.00 85.00 90.00 98.00 108.00 104.00 93.00 79.00 55.00 55.00 108.00
1995 61.00 70.00 69.00 72.00 89.00 91.00 98.00 97.00 97.00 76.00 61.00 59.00 98.00
1996 54.00 60.00 a 61.00 78.00 76.00 88.00 104.00 106.00 97.00 82.00 59.00 50.00 106.00
1997 55.00 60.00 70.00 75.00 85.00 90.00 100.00 105.00 99.00 84.00 64.00 53.00 105.00
1998 54.00 60.00 68.00 84.00 87.00 93.00 105.00 108.00 102.00 75.00 61.00 55.00 108.00
1999 53.00 55.00 71.00 76.00 89.00 99.00 103.00 101.00 90.00 77.00 74.00 a 52.00 103.00
2000 51.00 55.00 69.00 84.00 83.00 a 94.00 103.00 100.00 93.00 73.00 54.00 47.00 103.00
2001 57.00 51.00 72.00 81.00 96.00 95.00 103.00 106.00 97.00 83.00 65.00 51.00 106.00
2002 57.00 60.00 63.00 74.00 82.00 102.00 110.00 98.00 94.00 74.00 63.00 65.00 110.00
2003 60.00 57.00 76.00 74.00 93.00 101.00 106.00 101.00 100.00 84.00 66.00 51.00 106.00
2004 54.00 60.00 78.00 82.00 82.00 100.00 105.00 105.00 86.00 82.00 60.00 59.00 105.00
2005 60.00 61.00 72.00 79.00 91.00 100.00 105.00 104.00 91.00 78.00 58.00 55.00 105.00
2006 58.00 56.00 62.00 79.00 97.00 102.00 109.00 103.00 97.00 74.00 68.00 59.00 109.00
2007 58.00 64.00 73.00 76.00 93.00 101.00 108.00 103.00 94.00 87.00 66.00 63.00 108.00
2008 57.00 59.00 64.00 82.00 95.00 105.00 102.00 108.00 96.00 88.00 66.00 57.00 108.00
2009 56.00 61.00 62.00 82.00 92.00 94.00 101.00 106.00 97.00 75.00 60.00 49.00 106.00
2010 57.00 58.00 69.00 81.00 87.00 90.00 102.00 99.00 91.00 86.00 65.00 56.00 102.00
2011 62.00 59.00 67.00 69.00 86.00 90.00 99.00 101.00 100.00 83.00 64.00 57.00 101.00
2012 57.00 58.00 72.00 85.00 90.00 95.00 106.00 107.00 97.00 82.00 68.00 55.00 107.00
2013 55.00 61.00 d 73.00 71.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.00 z 73.00
Period of Record Statistics
MEAN 54.69 59.37 68.28 78.75 88.95 95.33 102.97 102.25 94.05 79.83 62.58 55.31 104.69
S.D. 5.14 4.18 4.75 5.75 5.37 4.70 3.53 3.89 4.72 4.92 4.64 4.29 3.26
SKEW -0.82 0.42 -0.09 0.38 -0.50 -0.03 0.07 0.10 -0.23 -0.16 0.26 0.00 0.00
MAX 66.00 72.00 78.00 97.00 100.00 107.00 110.00 115.00 103.00 89.00 74.00 65.00 115.00
MIN 40.00 50.00 57.00 68.00 75.00 82.00 95.00 94.00 82.00 69.00 54.00 46.00 97.00
NO YRS 65 65 65 64 64 64 64 65 65 65 65 65 64