BONNEVILLE DAM, OREGON

Monthly Average Minimum 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 43.94 n 37.92 e 37.92
1938 35.10 a 35.11 37.39 44.97 a 48.65 53.25 f 58.97 54.17 a 55.77 48.33 a 38.33 36.48 d 44.84
1939 37.71 32.70 a 38.52 44.73 49.29 51.63 57.71 58.29 53.80 48.23 39.43 39.03 45.92
1940 32.68 37.90 41.10 45.80 50.00 55.13 58.42 58.39 56.33 50.74 36.97 35.52 46.58
1941 34.42 37.71 42.29 45.13 49.61 53.67 59.87 58.42 52.73 48.13 40.93 37.45 46.70
1942 26.90 a 35.39 37.32 45.03 47.97 52.17 60.10 59.87 54.57 48.55 38.43 35.74 45.17
1943 26.00 34.64 36.29 44.37 45.65 51.00 56.61 55.29 55.13 48.06 39.63 33.10 43.81
1944 31.19 33.31 35.10 42.47 46.58 51.13 56.68 56.61 53.27 50.58 39.73 32.84 44.12
1945 36.10 35.64 36.61 41.47 49.16 51.03 56.52 56.52 50.57 45.55 38.50 32.94 44.22
1946 34.65 35.25 38.35 41.50 49.13 51.03 57.48 56.35 53.00 43.26 34.60 35.68 44.19
1947 30.00 35.54 39.90 43.07 49.39 51.43 55.74 54.77 52.50 47.81 40.17 36.35 44.72
1948 ----- z ----- z ----- z ----- z ----- z ----- z 55.16 56.39 50.70 45.26 37.97 29.87 45.89
1949 18.29 31.32 37.35 42.90 48.61 50.40 54.35 55.42 53.37 40.13 42.60 35.16 42.49
1950 18.42 27.14 35.81 39.87 43.84 52.67 54.19 57.00 51.50 45.19 38.97 37.87 41.87
1951 32.00 32.32 32.55 42.07 46.10 49.20 57.52 53.26 53.33 47.23 38.83 32.71 43.09
1952 28.10 33.17 36.32 41.50 46.45 51.23 56.90 57.03 53.37 50.84 35.00 34.32 43.69
1953 40.81 36.71 38.52 41.53 45.94 50.43 57.19 56.13 53.27 46.87 42.93 37.90 45.69
1954 31.42 34.96 34.29 41.37 47.32 50.70 53.97 56.10 53.23 44.45 44.47 33.00 43.77
1955 33.52 33.14 33.19 37.87 44.19 51.70 53.23 54.32 51.20 47.19 33.73 31.84 42.09
1956 32.94 27.69 36.61 42.61 b 49.29 51.17 57.68 57.00 52.33 45.13 37.13 35.55 43.76
1957 21.42 31.79 37.42 42.93 50.65 53.97 54.68 54.52 55.83 45.48 36.47 35.87 43.42
1958 36.06 41.14 36.00 42.33 49.81 57.33 59.94 58.84 52.97 47.29 39.07 36.87 46.47
1959 33.03 34.82 37.55 43.03 45.68 53.53 56.77 54.68 52.03 45.81 35.60 34.77 43.94
1960 27.45 35.17 35.52 41.17 45.93 d 51.93 56.84 55.29 51.97 46.84 39.33 32.52 43.33
1961 35.65 39.43 38.58 41.73 47.45 54.70 58.55 59.94 50.87 45.03 34.66 a 34.23 45.07
1962 32.29 35.11 a 35.74 43.40 45.45 51.67 55.55 56.61 54.80 47.45 41.93 37.26 44.77
1963 28.39 36.54 37.45 40.43 47.61 52.90 54.87 57.26 56.90 48.77 42.03 33.65 44.73
1964 36.19 34.38 36.84 39.07 45.29 51.63 56.52 55.42 51.63 47.74 38.27 31.13 43.68
1965 35.23 36.96 36.35 42.80 45.26 48.67 56.58 56.15 k 48.10 48.58 43.90 33.00 43.22
1966 33.30 d 34.00 35.06 43.00 43.71 51.37 55.39 55.13 53.63 45.35 41.37 37.35 44.06
1967 39.52 37.07 37.39 40.00 45.87 54.97 58.26 59.39 56.23 47.81 40.77 34.06 45.94
1968 32.52 38.48 40.55 40.00 46.84 51.60 56.19 53.68 52.97 44.00 39.93 31.23 44.00
1969 23.90 33.46 36.06 41.23 47.29 55.67 54.48 52.45 52.00 43.90 40.60 36.00 43.09
1970 32.10 38.00 36.68 38.27 44.10 52.50 55.26 53.71 49.43 43.77 38.80 33.03 42.97
1971 33.84 36.18 33.23 39.20 45.48 48.77 54.55 56.39 49.40 41.48 38.00 33.06 42.46
1972 32.06 33.52 38.68 37.03 46.61 50.73 55.13 54.94 48.10 42.39 40.50 27.74 42.29
1973 29.87 35.50 37.16 40.87 46.35 51.60 54.29 53.74 51.50 46.06 37.60 38.55 43.59
1974 29.61 36.93 37.32 42.50 45.13 51.53 54.77 55.77 53.20 44.84 40.00 37.26 44.07
1975 32.71 32.36 34.87 36.43 45.68 50.87 57.23 54.26 54.57 48.10 39.63 37.00 43.64
1976 36.03 34.90 35.74 40.40 46.48 49.07 55.61 55.32 54.33 46.23 42.53 36.35 44.42
1977 29.10 37.39 38.29 41.67 44.52 53.57 56.13 59.97 51.50 47.06 38.47 38.26 44.66
1978 34.65 38.64 39.74 42.03 46.45 54.53 57.48 57.52 53.37 47.42 34.73 32.55 44.93
1979 21.45 32.86 39.32 43.60 48.74 52.63 57.77 57.29 54.50 49.10 38.77 37.74 44.48
1980 27.78 d 34.69 38.45 43.97 48.16 51.83 58.00 55.52 53.00 46.55 42.87 37.94 44.90
1981 39.03 36.07 40.90 43.33 48.06 52.03 56.26 58.87 51.97 45.52 42.50 37.16 45.98
1982 34.61 35.21 37.55 39.30 46.00 55.10 56.06 57.10 53.00 46.42 37.73 36.13 44.52
1983 38.03 39.32 42.71 42.03 49.13 53.10 56.58 57.58 50.70 45.84 43.17 28.00 45.52
1984 33.81 36.79 41.39 41.87 45.52 51.17 55.94 55.10 51.03 44.19 40.07 32.74 44.13
1985 30.94 31.82 35.77 43.47 47.94 53.03 59.39 55.16 50.67 45.42 31.83 25.68 42.59
1986 35.42 36.68 42.00 41.53 47.29 55.13 55.10 58.03 52.00 48.97 42.70 35.19 45.84
1987 33.13 39.07 41.35 44.90 50.23 53.50 57.19 55.97 54.33 49.06 44.93 35.74 46.62
1988 33.13 36.48 39.32 44.30 47.71 52.67 56.61 56.84 53.93 52.55 42.80 36.61 46.08
1989 37.39 27.43 37.65 44.80 47.77 54.17 56.16 57.77 53.57 47.81 44.00 36.55 45.42
1990 38.39 34.68 39.42 45.00 47.48 53.50 58.23 59.71 56.63 46.13 43.00 29.23 45.95
1991 31.61 40.57 37.16 42.50 46.68 50.20 57.61 58.71 55.27 47.87 41.77 38.23 45.68
1992 38.29 41.31 42.90 45.33 50.87 56.57 59.68 58.45 53.30 49.84 41.63 34.58 47.73
1993 28.45 32.29 36.55 43.70 50.77 53.17 56.06 57.39 54.60 51.03 34.93 36.48 44.62
1994 39.00 33.54 39.74 45.87 50.13 52.07 59.29 59.68 56.47 47.94 37.17 36.42 46.44
1995 35.45 38.39 39.52 43.97 51.06 53.17 59.35 55.42 57.90 48.00 46.03 35.77 47.00
1996 34.61 30.62 37.48 43.93 45.90 50.73 57.74 54.10 50.00 46.65 40.33 33.65 43.81
1997 33.52 35.89 ----- z 41.70 49.16 52.40 57.74 58.94 54.83 46.13 42.03 35.84 46.20
1998 35.19 38.68 40.19 42.13 49.29 53.37 60.00 57.10 53.80 46.35 43.63 34.52 46.19
1999 37.94 36.61 38.00 39.10 43.71 51.63 54.29 58.32 50.33 45.68 43.43 38.61 44.80
2000 34.16 36.14 a 36.26 42.63 47.40 a 51.83 a 55.58 55.84 52.97 46.16 35.24 a 33.52 43.98
2001 34.50 a 33.50 38.59 d 40.00 45.68 49.73 55.06 56.45 53.20 45.00 41.53 35.81 44.09
2002 35.74 35.57 35.68 42.13 46.26 53.10 a 57.03 54.65 51.20 44.94 39.90 35.29 44.29
2003 38.77 35.18 40.35 41.67 46.35 53.93 56.10 56.74 53.73 48.58 37.00 36.06 45.37
2004 31.23 37.31 41.35 44.10 49.16 54.10 59.16 59.65 51.87 47.65 40.70 38.94 46.27
2005 34.39 33.89 39.81 43.43 50.61 52.80 58.13 56.90 48.40 48.29 39.10 32.74 44.87
2006 40.26 33.68 38.03 42.87 47.61 55.80 58.19 55.68 51.77 45.58 40.33 33.77 45.30
2007 32.06 37.00 40.55 41.90 46.68 53.47 60.77 56.32 51.17 44.35 37.27 34.06 44.63
2008 31.26 35.52 35.55 37.47 46.81 50.40 j 56.39 57.26 52.23 44.10 42.87 30.45 42.72
2009 32.29 33.11 35.65 39.57 45.13 54.33 57.07 a 58.61 54.37 44.48 40.20 29.58 43.70
2010 37.32 38.14 38.65 41.30 44.42 50.53 55.68 57.35 53.73 47.68 38.33 35.23 44.86
2011 34.71 32.93 37.68 39.53 44.03 51.57 54.84 58.03 54.57 48.58 37.63 33.16 43.94
2012 32.52 35.59 36.26 42.87 46.19 50.40 56.65 58.90 53.30 47.42 42.37 36.26 44.89
2013 31.48 36.11 37.77 50.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.12
Period of Record Statistics
MEAN 32.84 35.25 37.83 42.08 47.20 52.38 56.79 56.64 52.93 46.70 39.74 34.75 44.60
S.D. 4.63 2.81 2.26 2.12 1.96 1.82 1.71 1.81 2.04 2.20 2.91 2.78 1.26
SKEW -1.08 -0.51 0.18 -0.50 0.18 0.36 0.28 -0.03 -0.10 -0.15 -0.30 -0.90 0.14
MAX 40.81 41.31 42.90 45.87 51.06 57.33 60.77 59.97 57.90 52.55 46.03 39.03 47.73
MIN 18.29 27.14 32.55 36.43 43.71 48.67 53.23 52.45 48.10 40.13 31.83 25.68 41.87
NO YRS 75 75 74 74 74 72 75 74 75 75 75 76 70