BONNEVILLE DAM, OREGON

Monthly Average 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 47.83 o 42.98 e 42.98
1938 40.53 a 41.06 b 45.16 55.00 a 57.56 f 66.44 f 71.77 66.93 a 67.48 a 57.05 a 43.12 a 42.21 e 53.03
1939 41.77 g 38.56 a 47.34 54.40 59.61 60.37 68.90 70.55 64.70 55.45 47.02 43.73 a 55.51
1940 37.40 a 43.26 49.56 53.83 61.34 67.23 69.05 71.13 65.12 57.52 41.90 39.85 54.77
1941 38.05 44.09 52.05 55.07 58.26 63.07 72.03 67.76 60.57 54.56 48.23 41.26 54.58
1942 30.17 a 40.95 45.92 53.75 56.24 60.27 70.68 70.05 65.28 57.35 43.08 40.23 52.83
1943 30.85 40.54 43.94 53.48 54.85 59.83 67.32 65.82 66.72 55.37 44.75 38.48 51.83
1944 36.00 39.88 43.79 50.52 56.24 60.08 67.69 66.81 64.45 58.74 43.75 36.02 52.00
1945 40.81 42.00 42.97 49.05 57.94 61.35 68.58 67.58 60.25 54.47 43.18 37.24 52.12
1946 39.74 41.09 45.06 50.58 58.35 59.70 67.53 67.53 61.72 49.90 41.53 40.84 51.97
1947 35.53 43.04 48.48 52.60 60.48 59.93 65.81 64.95 63.27 53.53 44.98 41.18 52.82
1948 ----- z ----- z ----- z ----- z ----- z ----- z 64.84 65.05 61.15 53.15 43.22 34.90 53.72
1949 25.07 a 36.93 44.32 52.87 58.61 61.15 65.13 66.19 63.78 48.31 49.02 40.47 50.99
1950 23.92 33.39 42.50 48.37 54.16 61.55 65.95 68.94 62.92 51.81 44.27 42.08 49.99
1951 37.32 39.27 40.23 53.35 55.76 61.95 68.40 65.44 64.63 53.48 44.33 37.68 51.82
1952 31.84 39.50 42.95 a 52.15 57.18 59.55 68.65 67.92 65.47 60.89 40.63 38.15 52.07
1953 46.37 43.64 45.48 49.52 53.98 58.45 67.61 66.68 63.98 55.26 49.52 43.40 53.66
1954 36.39 40.43 43.18 49.95 56.97 58.57 62.69 63.82 62.03 52.16 49.52 38.03 51.14
1955 37.85 39.27 39.85 45.62 53.44 60.83 62.02 65.92 61.47 53.90 38.95 37.03 49.68
1956 36.95 32.59 43.24 51.95 b 59.44 59.62 68.77 66.10 62.38 52.31 42.18 40.45 51.33
1957 26.29 38.54 43.73 51.38 59.16 62.70 65.79 65.03 67.07 52.45 43.93 41.98 51.50
1958 41.16 46.29 43.84 50.22 61.27 65.53 71.65 70.92 63.12 56.16 44.95 41.82 54.74
1959 38.24 39.66 45.08 51.68 54.66 62.30 68.18 65.98 59.80 53.65 42.82 39.66 51.81
1960 31.71 41.12 43.02 49.92 54.09 d 62.48 69.37 65.11 61.90 54.77 45.52 37.08 51.34
1961 40.53 44.61 45.21 49.68 55.48 66.00 69.68 71.24 60.32 52.56 41.48 a 39.50 53.02
1962 37.89 40.91 a 42.35 52.92 52.18 61.80 66.19 66.24 63.77 54.61 47.10 41.60 52.30
1963 34.19 42.91 45.34 47.43 57.06 60.58 63.29 66.95 67.10 55.66 46.78 37.50 52.07
1964 41.40 41.90 44.11 47.98 54.02 59.80 66.06 64.50 60.45 55.56 42.63 36.40 51.24
1965 39.44 42.77 46.42 51.93 54.19 60.08 68.73 66.57 k 59.98 57.24 48.59 a 38.35 51.61
1966 38.44 g 40.20 43.76 51.90 55.55 61.53 a 65.32 67.10 63.95 53.58 47.12 41.61 53.78
1967 43.55 44.11 43.82 47.87 56.92 65.12 70.10 73.24 67.77 55.40 46.78 39.02 54.47
1968 37.89 45.62 48.69 49.35 56.42 61.85 67.89 64.39 62.52 52.35 45.85 36.74 52.46
1969 29.84 38.52 46.52 50.72 58.60 65.40 65.79 64.61 62.73 52.21 47.23 40.26 51.87
1970 36.61 44.93 45.55 47.15 56.11 64.55 67.47 67.15 59.58 52.34 44.90 38.35 52.06
1971 39.92 42.95 41.10 48.33 56.24 58.00 66.76 69.27 60.07 51.02 44.07 38.58 51.36
1972 38.06 40.26 47.29 45.98 58.02 60.95 68.32 69.31 59.00 52.90 46.43 34.02 51.71
1973 35.74 42.18 45.32 50.97 57.77 61.93 67.40 64.68 62.58 53.77 42.95 43.02 52.36
1974 35.24 42.50 45.06 49.72 54.13 62.77 65.34 67.19 66.15 55.98 46.33 42.69 52.76
1975 39.02 38.30 42.68 45.73 55.98 60.70 67.21 64.15 66.60 53.71 45.28 41.65 51.75
1976 41.53 40.83 43.13 48.90 56.81 58.92 66.35 64.15 64.17 55.19 48.27 41.18 52.45
1977 33.37 43.05 44.79 52.80 52.89 64.00 66.45 71.68 59.88 54.89 43.58 41.73 52.43
1978 37.81 42.86 48.26 50.45 55.06 64.95 67.92 67.11 60.67 56.73 41.02 37.73 52.55
1979 25.90 38.43 48.05 50.77 58.58 63.60 68.55 66.95 65.60 56.84 43.25 42.03 52.38
1980 32.71 e 38.79 44.71 53.12 56.68 59.38 67.74 65.24 62.63 55.76 d 47.15 42.65 52.21
1981 42.71 42.54 a 48.97 50.80 56.61 60.37 65.83 a 70.81 63.25 53.11 48.35 41.61 53.75
1982 39.31 41.25 45.90 48.33 56.50 64.70 66.16 67.45 62.43 53.50 43.10 40.37 52.42
1983 42.81 43.80 49.21 51.62 59.06 60.98 64.94 67.44 60.45 54.47 47.95 31.73 52.87
1984 38.95 42.41 48.45 49.10 54.37 59.68 67.77 67.92 61.00 51.44 45.03 37.23 51.95
1985 34.50 38.30 44.52 52.53 57.56 63.62 72.60 67.05 59.62 53.61 36.33 29.02 50.77
1986 39.77 42.43 a 50.39 50.45 56.97 65.85 64.79 71.87 60.57 57.69 47.88 38.15 53.90
1987 37.48 44.29 47.58 54.93 59.87 65.03 66.77 68.89 66.17 a 59.89 49.45 39.18 54.96
1988 37.03 43.57 47.35 52.52 56.66 62.68 68.56 68.65 64.65 60.35 47.58 41.00 54.22
1989 42.27 32.62 44.05 54.75 57.56 65.00 65.76 66.66 66.32 55.53 49.02 40.89 53.37
1990 43.65 40.45 48.40 54.37 56.48 62.75 70.63 70.55 66.95 53.52 49.05 34.37 54.26
1991 37.27 47.09 44.82 50.05 54.13 59.02 69.52 69.68 67.23 57.13 46.57 42.23 53.73
1992 43.27 46.36 51.94 54.03 62.76 67.63 70.52 70.44 63.47 56.97 46.45 38.61 56.04
1993 32.34 37.36 43.74 50.47 60.13 61.23 63.34 67.42 66.33 59.24 40.82 40.27 51.89
1994 43.47 38.09 48.48 53.43 59.34 61.52 70.10 69.79 66.48 55.65 42.05 40.31 54.06
1995 38.63 45.02 47.02 51.15 59.97 62.05 69.31 66.02 66.50 54.73 50.73 39.66 54.23
1996 39.50 37.17 46.00 52.28 54.05 a 61.33 70.34 67.40 60.55 54.52 45.02 39.18 52.28
1997 37.77 a 42.57 ----- z 50.15 60.89 62.20 68.89 70.69 65.75 53.95 47.75 40.19 54.62
1998 39.56 44.38 47.44 51.75 55.84 62.55 69.47 68.32 66.43 54.87 48.32 39.98 54.08
1999 43.16 42.91 45.95 49.93 54.35 60.75 66.24 68.89 64.50 56.16 49.13 43.27 53.77
2000 39.39 42.46 a 45.26 53.75 57.05 a 64.60 a 66.85 67.61 63.80 55.16 41.48 a 37.37 52.90
2001 39.13 a 40.77 48.02 d 49.67 58.35 60.58 66.03 68.63 65.15 54.47 47.52 40.71 53.25
2002 40.58 43.61 44.03 51.52 56.00 63.83 a 69.56 67.82 64.27 54.90 46.87 40.13 53.59
2003 43.34 43.59 47.53 50.72 56.76 65.67 70.45 69.60 66.03 57.48 43.12 39.74 54.50
2004 35.31 42.60 51.11 55.27 58.34 64.75 71.52 70.34 61.92 55.84 47.43 42.97 54.78
2005 39.11 43.18 50.13 51.58 59.92 61.48 69.97 70.15 61.42 56.13 44.82 37.15 53.75
2006 44.45 40.91 45.66 52.77 59.05 65.60 70.31 68.02 64.13 54.39 45.72 38.00 54.08
2007 37.53 42.32 48.74 51.47 58.21 63.17 71.61 67.76 61.95 51.60 44.20 38.87 53.12
2008 35.63 42.64 43.45 46.17 56.56 59.22 j 67.89 68.42 63.43 53.11 47.62 35.63 50.96
2009 37.71 39.18 41.98 49.50 57.05 63.73 69.90 a 68.63 65.58 51.97 45.03 33.66 51.99
2010 40.79 44.66 46.98 49.70 53.32 59.18 66.89 67.94 62.65 55.68 43.75 38.56 52.51
2011 39.52 38.84 43.16 46.85 52.81 60.20 64.82 68.16 65.52 54.69 43.43 38.34 51.36
2012 38.37 40.79 42.60 51.07 55.87 59.23 66.10 70.02 64.57 54.92 46.47 40.37 52.53
2013 35.19 42.34 46.32 60.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.29
Period of Record Statistics
MEAN 37.57 41.36 45.66 50.97 56.89 62.08 67.79 67.79 63.52 54.76 45.27 39.34 52.73
S.D. 4.56 2.89 2.64 2.37 2.29 2.30 2.30 2.14 2.39 2.30 2.80 2.76 1.26
SKEW -0.96 -0.82 0.31 -0.27 0.18 0.43 -0.15 0.22 -0.08 0.20 -0.45 -1.05 0.24
MAX 46.37 47.09 52.05 55.27 62.76 67.63 72.60 73.24 67.77 60.89 50.73 43.73 56.04
MIN 23.92 32.59 39.85 45.62 52.18 58.00 62.02 63.82 59.00 48.31 36.33 29.02 49.68
NO YRS 73 75 74 74 73 72 75 74 75 75 75 76 68