LEWISTON WSO AP, IDAHO

Monthly Average 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 68.65 a 62.52 51.24 39.60 28.52 50.10
1949 14.29 33.57 44.02 54.00 61.74 66.20 72.53 73.10 64.57 46.79 45.20 34.61 50.88
1950 16.45 34.70 41.45 47.80 55.89 63.92 72.45 73.37 64.28 53.16 42.68 41.00 50.60
1951 33.18 37.18 39.69 51.80 57.82 63.07 74.29 71.27 63.60 49.48 39.27 29.79 50.87
1952 28.89 37.47 41.85 53.65 59.35 63.62 73.10 72.00 65.67 55.98 35.37 36.19 51.93
1953 44.13 39.71 44.00 50.07 54.74 59.90 72.77 71.58 66.23 53.29 43.83 38.79 53.25
1954 32.55 41.18 40.00 49.33 59.11 60.78 71.60 66.71 61.08 48.85 43.77 33.00 50.66
1955 31.47 33.66 35.29 45.03 53.32 66.65 70.45 71.52 61.92 51.79 33.70 31.82 48.89
1956 32.85 27.97 42.06 53.33 60.06 62.68 74.02 69.90 62.82 49.60 36.87 36.21 50.70
1957 18.31 35.45 43.76 50.53 60.68 65.68 71.45 69.61 65.92 50.50 38.75 39.58 50.85
1958 37.32 44.71 41.19 48.88 64.61 68.58 75.50 76.32 62.37 53.11 41.07 39.02 54.39
1959 35.65 36.61 43.71 50.73 54.39 65.37 73.98 68.21 59.47 50.63 36.07 34.81 50.80
1960 26.47 36.36 43.73 50.55 54.92 66.25 77.66 67.82 63.93 51.56 40.50 31.63 50.95
1961 35.71 42.46 44.58 49.68 56.79 71.38 76.63 78.42 59.68 49.48 35.98 33.98 52.90
1962 32.08 37.45 41.45 53.50 54.69 64.83 72.15 69.76 64.17 51.50 43.20 36.74 51.79
1963 24.16 40.66 45.13 49.10 59.97 65.75 70.29 73.65 69.77 56.08 42.85 33.92 52.61
1964 36.77 36.84 41.76 47.63 57.39 64.37 72.68 68.63 60.70 52.29 38.97 31.47 50.79
1965 34.10 39.61 40.02 52.03 56.65 65.20 74.16 72.18 59.17 56.24 44.28 36.44 52.51
1966 36.13 37.84 43.71 50.70 61.16 64.23 72.79 72.85 68.57 51.87 43.22 39.84 53.58
1967 39.69 41.29 42.08 46.52 58.23 68.42 76.24 79.10 69.48 53.40 40.87 33.50 54.07
1968 34.81 43.09 47.35 48.37 58.58 66.33 76.40 69.82 62.87 50.42 41.82 31.06 52.58
1969 23.63 34.70 43.23 50.67 61.40 69.67 72.79 71.84 64.28 47.85 40.80 34.94 51.32
1970 34.37 41.95 42.77 46.23 59.26 70.13 76.03 75.02 58.15 49.87 41.43 34.00 52.43
1971 36.23 39.02 40.84 49.57 60.40 62.32 74.58 78.06 58.53 48.79 39.72 34.13 51.85
1972 32.23 37.53 46.98 47.05 60.97 67.03 73.21 75.06 60.35 51.21 41.25 28.92 51.82
1973 32.24 39.07 45.71 50.42 61.08 67.62 77.05 74.77 64.68 51.29 39.80 39.34 53.59
1974 29.11 41.25 44.27 51.07 56.34 71.17 73.92 73.66 66.23 53.08 43.03 37.31 53.37
1975 34.24 35.27 41.00 46.48 57.79 63.60 77.74 70.39 66.15 51.39 40.25 36.90 51.77
1976 37.00 37.97 40.89 50.10 59.69 62.95 73.89 69.97 68.98 54.26 43.48 35.56 52.90
1977 28.77 41.48 42.13 55.93 56.48 72.27 73.11 77.37 61.33 50.71 39.42 36.74 52.98
1978 35.35 40.73 47.63 49.98 55.98 67.17 74.06 71.08 61.87 52.16 35.08 28.95 51.67
1979 16.85 35.95 45.97 49.82 59.15 67.12 76.00 74.95 68.95 55.90 37.45 39.76 52.32
1980 28.58 39.60 43.06 55.97 58.19 63.13 73.52 68.77 63.97 52.11 41.58 40.34 52.40
1981 38.45 39.71 46.52 51.62 56.95 62.17 70.90 77.71 65.50 49.53 44.15 36.69 53.33
1982 31.92 a 36.77 44.24 47.67 57.19 69.13 72.66 74.34 63.87 51.40 38.80 34.81 51.90
1983 40.47 42.93 47.05 49.17 59.45 65.12 70.53 76.65 60.72 53.02 43.78 25.27 52.85
1984 35.98 40.74 46.81 49.25 56.08 63.82 75.21 74.95 61.45 48.52 42.15 30.42 52.11
1985 27.95 32.55 42.26 53.45 60.26 66.90 79.94 69.47 56.80 48.65 28.93 23.21 49.20
1986 39.15 38.96 48.79 50.47 60.10 70.90 68.87 77.66 59.38 53.89 40.42 34.68 53.60
1987 32.02 40.41 46.37 56.97 62.29 69.95 71.44 71.97 68.25 54.58 43.57 33.77 54.30
1988 33.31 41.31 44.35 53.42 58.82 66.68 73.82 73.84 64.18 58.73 42.53 34.15 53.76
1989 36.24 26.55 46.29 56.08 59.34 68.57 74.47 71.35 66.03 54.37 47.07 37.85 53.69
1990 41.85 39.62 48.37 57.03 58.79 67.55 77.39 75.60 72.95 53.08 47.07 30.56 55.82
1991 34.48 47.70 45.39 52.00 55.85 60.28 72.27 75.08 65.53 50.60 40.10 37.60 53.07
1992 37.90 42.12 49.10 53.77 63.02 71.18 72.42 73.32 62.33 54.11 40.18 32.71 54.35
1993 26.97 32.82 46.42 50.13 62.92 63.88 65.42 70.23 64.67 54.34 35.15 36.05 50.75
1994 40.40 35.61 46.61 54.15 61.53 66.00 77.76 75.15 67.42 52.10 38.38 34.56 54.14
1995 35.05 41.93 44.47 49.87 59.82 63.72 73.37 69.94 66.28 49.34 45.10 34.66 52.80
1996 34.11 34.29 a 43.39 51.33 54.10 64.03 74.81 73.39 61.75 51.42 40.48 34.24 51.44
1997 33.69 38.29 44.53 48.75 61.48 64.18 71.68 76.19 66.43 51.94 43.10 34.08 52.86
1998 36.90 42.02 45.56 50.92 58.87 65.50 78.68 76.39 69.27 49.92 43.53 34.45 54.33
1999 37.56 40.54 43.69 48.65 55.26 63.82 71.85 75.31 64.05 52.02 45.64 a 37.34 52.98
2000 36.02 40.64 44.19 54.37 58.35 a 65.98 73.60 73.56 61.08 49.63 34.08 32.85 52.03
2001 34.18 36.89 45.10 48.38 60.16 63.33 73.56 76.48 68.12 51.73 44.13 34.84 53.08
2002 36.92 38.89 40.76 49.78 56.74 66.95 77.06 70.45 64.17 47.69 41.58 38.15 52.43
2003 39.79 37.96 46.15 49.85 57.40 68.27 78.82 75.65 66.48 55.39 38.68 36.60 54.25
2004 34.00 40.26 49.13 54.02 58.55 67.85 77.55 75.76 63.48 53.35 41.90 37.85 54.48
2005 37.94 39.14 47.85 52.38 60.56 64.43 76.61 75.16 62.98 53.84 40.32 31.84 53.59
2006 42.19 37.48 44.68 51.95 61.27 68.55 79.32 73.94 65.40 50.68 42.82 35.58 54.49
2007 31.08 39.66 48.58 51.58 60.45 67.28 80.27 73.52 64.52 52.29 39.83 36.10 53.76
2008 32.97 41.26 42.16 47.08 61.02 65.48 74.97 74.15 65.52 52.63 44.38 30.39 52.67
2009 33.90 39.59 40.65 50.35 60.18 67.08 76.34 74.74 68.15 48.53 41.40 29.26 52.51
2010 40.98 42.59 45.89 51.00 54.84 63.52 73.66 73.13 65.13 53.58 38.52 35.56 53.20
2011 36.81 35.09 44.89 45.70 55.15 62.87 70.82 75.50 69.42 53.23 40.40 33.27 51.93
2012 36.37 39.28 44.18 53.07 57.65 65.52 77.58 77.37 68.33 52.92 45.70 38.13 54.67
2013 33.47 41.42 d 47.52 56.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 30.00 z 40.80
Period of Record Statistics
MEAN 33.46 38.57 44.20 50.79 58.61 65.90 74.23 73.28 64.34 51.89 40.85 34.56 52.57
S.D. 6.02 3.60 2.72 2.76 2.50 2.79 2.81 2.96 3.29 2.35 3.41 3.54 1.37
SKEW -1.29 -0.78 -0.39 0.26 -0.08 0.21 -0.10 -0.19 0.04 0.26 -0.82 -0.71 -0.35
MAX 44.13 47.70 49.13 57.03 64.61 72.27 80.27 79.10 72.95 58.73 47.07 41.00 55.82
MIN 14.29 26.55 35.29 45.03 53.32 59.90 65.42 66.71 56.80 46.79 28.93 23.21 48.89
NO YRS 65 65 65 64 64 64 64 65 65 65 65 65 64