BONNEVILLE DAM, OREGON

Monthly Average Maximum Temperature (Degrees Fahrenheit)

(350897)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1937 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 51.71 i 47.93 d 47.93
1938 46.26 46.50 b 52.94 64.93 68.76 f 79.62 f 84.58 79.70 a 79.10 a 65.77 a 47.97 a 46.87 a 61.46
1939 46.38 g 44.46 56.16 64.07 69.94 69.10 80.10 82.81 75.60 62.68 54.60 48.53 a 64.37
1940 42.20 a 48.62 58.03 61.87 72.68 79.33 79.68 83.87 73.90 64.29 46.83 44.19 62.96
1941 41.68 50.46 61.81 65.00 66.90 72.47 84.19 77.10 68.40 61.00 55.53 45.06 62.47
1942 33.19 46.50 54.52 62.47 64.52 68.37 81.26 80.23 76.00 66.16 47.73 44.71 60.47
1943 35.71 46.43 51.58 62.60 64.06 68.67 78.03 76.35 78.30 62.68 49.87 43.87 59.85
1944 40.81 46.45 52.48 58.57 65.90 69.03 78.71 77.00 75.63 66.90 47.77 39.19 59.87
1945 45.52 48.36 49.32 56.63 66.71 71.67 80.65 78.65 69.93 63.39 47.87 41.55 60.02
1946 44.84 46.93 51.77 59.67 67.58 68.37 77.58 78.71 70.43 56.55 48.47 46.00 59.74
1947 41.06 50.54 57.06 62.13 71.58 68.43 75.87 75.13 74.03 59.26 49.80 46.00 60.91
1948 ----- z ----- z ----- z ----- z ----- z ----- z 74.52 73.71 71.60 61.03 48.47 39.94 61.54
1949 31.77 a 42.54 51.29 62.83 68.61 71.90 75.90 76.97 74.20 56.48 55.43 45.77 59.48
1950 29.42 39.64 49.19 56.87 64.48 70.43 77.71 80.87 74.33 58.42 49.57 46.29 58.10
1951 42.65 46.21 47.90 64.63 65.42 74.70 79.29 77.61 75.93 59.74 49.83 42.65 60.55
1952 35.58 45.83 49.50 a 62.80 67.90 67.87 80.39 78.81 77.57 70.94 46.27 41.97 60.45
1953 51.94 50.57 52.45 57.50 62.03 66.47 78.03 77.23 74.70 63.65 56.10 48.90 61.63
1954 41.35 45.89 52.06 58.53 66.61 66.43 71.42 71.55 70.83 59.87 54.57 43.06 58.52
1955 42.19 45.39 46.52 53.37 62.68 69.97 70.81 77.52 71.73 60.61 44.17 42.23 57.26
1956 40.97 37.48 49.87 61.93 a 69.58 68.07 79.87 75.19 72.43 59.48 47.23 45.35 58.96
1957 31.16 45.29 50.03 59.83 67.68 71.43 76.90 75.55 78.30 59.42 51.40 48.10 59.59
1958 46.26 51.43 51.68 58.10 72.74 73.73 83.35 83.00 73.27 65.03 50.83 46.77 63.02
1959 43.45 44.50 52.61 60.33 63.65 71.07 79.58 77.29 67.57 61.48 50.03 44.55 59.68
1960 35.97 47.07 50.52 58.67 61.87 73.03 81.90 74.94 71.83 62.71 51.70 41.65 59.32
1961 45.42 49.79 51.84 57.63 63.52 77.30 80.81 82.55 69.77 60.10 48.31 a 44.77 60.98
1962 43.48 46.70 a 48.97 62.43 58.90 71.93 76.84 75.87 72.73 61.77 52.27 45.94 59.82
1963 40.00 49.29 53.23 54.43 66.52 68.27 71.71 76.65 77.30 62.55 51.53 41.35 59.40
1964 46.61 49.41 51.39 56.90 62.74 67.97 75.61 73.58 69.27 63.39 47.00 41.68 58.80
1965 43.65 48.57 56.48 61.07 63.13 71.50 80.87 78.52 71.87 65.90 53.24 a 43.71 61.54
1966 43.96 c 46.39 52.45 60.80 67.39 71.41 a 75.26 79.06 74.27 61.81 52.87 45.87 60.96
1967 47.58 51.14 50.26 55.73 67.97 75.27 81.94 87.10 79.30 63.00 52.80 43.97 63.00
1968 43.26 52.76 56.84 58.70 66.00 72.10 79.58 75.10 72.07 60.71 51.77 42.26 60.93
1969 35.77 43.57 56.97 60.20 69.90 75.13 77.10 76.77 73.47 60.52 53.87 44.52 60.65
1970 41.13 51.86 54.42 56.03 68.13 76.60 79.68 80.58 69.73 60.90 51.00 43.68 61.14
1971 46.00 49.71 48.97 57.47 67.00 67.23 78.97 82.16 70.73 60.55 50.13 44.10 60.25
1972 44.06 47.00 55.90 54.93 69.42 71.17 81.52 83.68 69.90 63.42 52.37 40.29 61.14
1973 41.61 48.86 53.48 61.07 69.19 72.27 80.52 75.61 73.67 61.48 48.30 47.48 61.13
1974 40.87 48.07 52.81 56.93 63.13 74.00 75.90 78.61 79.10 67.13 52.67 48.13 61.45
1975 45.32 44.25 50.48 55.03 66.29 70.53 77.19 74.03 78.63 59.32 50.93 46.29 59.86
1976 47.03 46.76 50.52 57.40 67.13 68.77 77.10 72.97 74.00 64.16 54.00 46.00 60.49
1977 37.65 48.71 51.29 63.93 61.26 74.43 76.77 83.39 68.27 62.71 48.70 45.19 60.19
1978 40.97 47.07 56.77 58.87 63.68 75.37 78.35 76.71 67.97 66.03 47.30 42.90 60.17
1979 30.35 44.00 56.77 57.93 68.42 74.57 79.32 76.61 76.70 64.58 47.73 46.32 60.28
1980 38.04 d 42.90 50.97 62.27 65.19 66.93 77.48 74.97 72.27 64.89 d 51.43 47.35 59.56
1981 46.39 48.63 a 57.03 58.27 65.16 68.70 75.70 a 82.74 74.53 60.71 54.20 46.06 61.51
1982 44.00 47.29 54.26 57.37 67.00 74.30 76.26 77.81 71.87 60.58 48.47 44.61 60.32
1983 47.58 48.29 55.71 61.20 69.00 68.87 73.29 77.29 70.20 63.10 52.73 35.45 60.23
1984 44.10 48.03 55.52 56.33 63.23 68.20 79.61 80.74 70.97 58.68 50.00 41.71 59.76
1985 38.06 44.79 53.26 61.60 67.19 74.20 85.81 78.94 68.57 61.81 40.83 32.35 58.95
1986 44.13 47.96 a 58.77 59.37 66.65 76.57 74.48 85.71 69.13 66.42 53.07 41.10 61.95
1987 41.84 49.50 53.81 64.97 69.52 76.57 76.35 81.81 77.93 a 70.71 53.97 42.61 63.30
1988 40.94 50.66 55.39 60.73 65.61 72.70 80.52 80.45 75.37 68.16 52.37 45.39 62.36
1989 47.16 37.82 50.45 64.70 67.35 75.83 75.35 75.55 79.07 63.26 54.03 45.23 61.32
1990 48.90 46.21 57.39 63.73 65.48 72.00 83.03 81.39 77.27 60.90 55.10 39.52 62.58
1991 42.94 53.61 52.48 57.60 61.58 67.83 81.42 80.65 79.20 66.39 51.37 46.23 61.77
1992 48.26 51.41 60.97 62.73 74.65 78.70 81.35 82.42 73.63 64.10 51.27 42.65 64.34
1993 36.23 42.43 50.94 57.23 69.48 69.30 70.61 77.45 78.07 67.45 46.70 44.06 59.16
1994 47.94 42.64 57.23 61.00 68.55 70.97 80.90 79.90 76.50 63.35 46.93 44.19 61.68
1995 41.81 51.64 54.52 58.33 68.87 70.93 79.26 76.61 75.10 61.45 55.43 43.55 61.46
1996 44.39 43.72 54.52 60.63 62.37 a 71.93 82.94 80.71 71.10 62.39 49.70 44.71 60.76
1997 42.17 a 49.25 ----- z 58.60 72.61 72.00 80.03 82.45 76.67 61.77 53.47 44.55 63.05
1998 43.94 50.07 54.68 61.37 62.39 71.73 78.94 79.55 79.07 63.39 53.00 45.45 61.96
1999 48.39 49.21 53.90 60.77 65.00 69.87 78.19 79.45 78.67 66.65 54.83 47.94 62.74
2000 44.61 48.93 54.26 64.87 66.52 77.20 78.13 79.39 74.63 64.16 47.60 41.23 61.79
2001 43.77 48.04 56.48 59.33 71.03 71.43 77.00 80.81 77.10 63.94 53.50 45.61 62.34
2002 45.42 51.64 52.39 60.90 65.74 74.55 a 82.10 81.00 77.33 64.87 53.83 44.97 62.90
2003 47.90 52.00 54.71 59.77 67.16 77.40 84.81 82.45 78.33 66.39 49.23 43.42 63.63
2004 39.39 47.90 60.87 66.43 67.52 75.40 83.87 81.03 71.97 64.03 54.17 47.00 63.30
2005 43.84 52.46 60.45 59.73 69.23 70.17 81.81 83.39 74.43 63.97 50.53 41.55 62.63
2006 48.65 48.14 53.29 62.67 70.48 75.40 82.42 80.35 76.50 63.19 51.10 42.23 62.87
2007 43.00 47.64 56.94 61.03 69.74 72.87 82.45 79.19 72.73 58.84 51.13 43.68 61.60
2008 40.00 49.76 51.35 54.87 66.32 68.05 j 79.39 79.58 74.63 62.13 52.37 40.81 59.20
2009 43.13 45.25 48.32 59.43 68.97 73.13 83.39 78.65 76.80 59.45 49.87 37.74 60.34
2010 44.26 51.18 55.32 58.10 62.23 67.83 78.10 78.52 71.57 63.68 49.17 41.90 60.15
2011 44.32 44.75 48.65 54.17 61.58 68.83 74.81 78.29 76.47 60.81 49.23 43.52 58.78
2012 44.23 46.00 48.94 59.27 65.55 68.07 75.55 81.13 75.83 62.42 50.57 44.48 60.17
2013 38.90 48.57 54.87 70.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 47.45
Period of Record Statistics
MEAN 42.40 47.46 53.48 59.87 66.60 71.76 78.81 78.93 74.10 62.82 50.80 43.93 60.87
S.D. 4.58 3.25 3.34 3.00 3.14 3.21 3.32 3.10 3.30 2.87 2.95 2.90 1.45
SKEW -0.86 -0.74 0.34 0.02 0.04 0.34 -0.31 0.08 -0.13 0.39 -0.48 -1.15 0.10
MAX 51.94 53.61 61.81 66.43 74.65 79.33 85.81 87.10 79.30 70.94 56.10 48.90 64.34
MIN 29.42 37.48 46.52 53.37 58.90 66.43 70.61 71.55 67.57 56.48 40.83 32.35 57.26
NO YRS 74 75 74 74 73 72 75 75 75 75 75 76 70