MC NARY DAM, WASHINGTON

Monthly Average Temperature (Degrees Fahrenheit)

(455231)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200810
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
1954 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 51.80 f 47.47 35.63 41.55
1955 35.95 38.62 41.24 49.58 58.37 69.17 71.82 74.65 67.28 55.76 37.03 34.81 52.86
1956 35.73 28.86 45.61 56.32 63.55 65.95 77.69 74.26 66.38 54.48 39.65 37.71 53.85
1957 20.08 37.75 45.58 55.07 65.52 69.95 73.66 72.39 68.93 52.87 42.80 42.18 53.90
1958 40.08 46.88 45.48 52.57 66.24 72.27 80.79 80.11 65.87 55.77 44.48 38.55 57.42
1959 36.74 40.84 47.15 54.12 58.21 68.20 76.63 72.03 63.83 55.00 38.67 35.23 53.89
1960 26.42 39.62 45.08 53.88 59.10 69.90 79.97 71.95 66.25 55.10 44.30 32.37 53.66
1961 36.79 45.66 48.31 53.08 60.18 72.67 79.27 80.15 63.28 52.69 38.10 36.94 55.59
1962 32.06 38.66 42.87 55.16 a 56.23 66.52 73.31 70.52 64.72 53.45 45.42 39.29 53.18
1963 28.13 38.39 45.97 50.67 61.23 67.37 70.64 b 73.81 67.91 b 57.00 45.83 33.27 53.35
1964 40.24 41.14 44.23 52.02 58.98 66.98 74.66 70.32 63.83 53.11 41.75 32.77 53.34
1965 37.10 42.93 43.69 56.28 60.81 67.95 75.95 75.15 62.70 57.39 46.53 36.85 55.28
1966 37.69 40.41 45.92 55.05 a 62.37 66.90 72.02 75.19 69.02 54.65 45.72 41.47 55.53
1967 43.74 43.62 45.89 49.63 62.26 71.72 78.11 80.55 71.05 55.98 43.98 36.48 56.92
1968 36.76 42.26 49.00 52.02 62.15 69.37 78.29 72.02 66.53 52.89 43.98 34.27 54.96
1969 24.52 a 35.62 45.27 52.58 63.81 72.37 74.79 72.68 66.42 52.15 45.00 38.03 53.60
1970 33.97 41.41 45.56 48.83 60.03 71.32 77.44 74.27 60.77 52.19 43.20 36.42 53.78
1971 40.56 41.39 42.82 51.55 62.29 64.60 76.27 79.08 61.67 52.76 43.85 38.66 54.63
1972 34.65 37.00 47.34 49.10 61.85 68.87 74.56 76.11 62.78 53.48 44.25 28.68 53.22
1973 30.85 37.86 47.65 53.27 62.82 a 68.02 76.40 74.10 65.13 54.65 43.07 41.50 54.61
1974 30.32 42.48 46.10 52.25 58.26 69.32 73.15 a 74.63 66.58 53.90 44.37 41.31 54.39
1975 36.34 36.41 43.29 47.68 58.47 a 64.38 74.56 70.19 65.73 53.90 41.18 39.35 52.63
1976 37.69 38.53 42.26 50.55 60.23 63.98 73.40 70.34 68.03 53.31 43.47 34.82 53.05
1977 27.79 41.45 45.35 55.43 56.87 71.23 72.66 78.05 62.25 53.47 41.65 38.23 53.70
1978 33.85 40.04 47.42 52.32 56.03 p 69.32 j 74.68 73.13 63.87 55.19 36.90 a 34.68 51.21
1979 18.92 36.48 47.16 54.02 62.37 68.97 75.79 74.52 67.72 56.87 38.77 38.02 53.30
1980 27.11 35.81 45.31 55.00 60.06 65.13 c 73.39 72.73 i 61.81 q 52.81 44.19 a 38.93 c 49.77
1981 44.00 z ----- z 49.18 t 51.57 g ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1982 45.12 z 38.38 45.19 50.10 t 58.55 j 70.42 x 73.44 74.21 64.58 52.19 39.92 37.23 53.14
1983 40.32 43.36 50.03 52.25 63.15 66.37 71.10 74.97 62.88 54.18 47.90 25.95 54.37
1984 33.58 40.16 47.97 51.65 57.15 65.05 74.81 75.10 63.27 52.02 43.40 32.06 53.02
1985 29.65 32.18 44.52 56.35 d 62.35 69.07 79.81 71.82 61.17 54.32 31.18 23.50 51.33
1986 34.85 39.12 49.02 51.72 60.13 a 71.63 70.73 78.23 62.73 55.45 44.53 34.76 54.41
1987 33.44 41.05 47.60 56.38 63.37 69.53 73.85 a 73.58 68.23 55.00 45.72 35.26 55.25
1988 34.53 40.57 46.08 53.77 59.39 66.20 74.40 72.69 64.63 59.53 47.07 36.65 54.63
1989 39.42 26.36 43.95 55.12 59.63 69.00 72.71 71.81 65.90 54.81 46.77 34.95 53.37
1990 40.97 38.57 46.29 56.30 59.02 66.87 76.87 75.06 70.72 53.34 46.98 27.48 54.87
1991 31.13 42.55 43.69 52.80 58.00 63.15 74.85 76.66 67.33 54.40 43.20 39.39 53.93
1992 39.06 42.43 48.92 55.05 62.76 72.53 73.15 74.52 62.92 55.35 43.08 34.42 55.35
1993 24.76 30.54 40.69 52.45 63.65 65.58 68.21 70.89 64.82 55.89 36.02 37.52 50.92
1994 39.97 36.09 46.58 56.03 62.84 66.12 77.69 74.26 68.08 53.98 41.43 37.48 55.05
1995 33.13 41.95 45.73 51.40 61.53 65.90 74.11 69.40 68.33 52.95 46.63 36.55 53.97
1996 35.23 33.09 44.40 52.98 56.26 64.92 74.73 72.84 63.23 53.87 40.95 34.32 52.23
1997 34.05 39.30 46.29 51.25 61.74 65.62 72.13 75.44 65.97 53.61 44.18 37.23 53.90
1998 36.85 42.86 47.18 51.58 59.65 67.15 79.42 75.50 69.97 53.13 47.55 37.08 55.66
1999 40.65 43.16 45.84 50.57 57.11 65.22 71.52 74.94 63.92 53.26 47.40 40.19 54.48
2000 36.79 39.47 45.73 a 54.82 60.66 68.07 a 73.55 a 73.82 63.62 53.29 37.70 33.18 53.39
2001 35.13 37.48 46.58 51.10 61.39 65.05 74.66 75.74 68.57 54.08 44.00 38.56 54.36
2002 38.71 40.07 42.77 52.88 58.48 68.65 76.42 72.68 65.92 52.19 41.98 39.98 54.23
2003 40.65 40.80 49.55 53.03 ----- z 69.70 77.89 75.58 67.83 58.10 40.40 37.06 55.51
2004 29.60 38.75 e 49.94 54.85 60.63 68.93 77.37 76.34 64.93 56.69 43.35 38.19 54.96
2005 33.69 37.82 49.34 53.32 62.40 66.12 ----- z ----- z 65.02 ----- z 42.02 30.81 48.95
2006 41.56 ----- z 46.24 52.88 ----- z 67.75 77.37 ----- z 65.13 53.81 43.02 33.60 53.48
2007 31.81 38.80 48.06 52.28 60.45 66.83 77.42 72.31 65.45 52.79 42.47 38.02 53.89
2008 32.92 40.91 43.71 48.08 60.15 64.42 73.90 72.77 63.42 53.03 ----- z ----- z 55.33
Period of Record Statistics
MEAN 34.36 39.15 45.91 52.86 60.70 67.81 75.04 74.23 65.52 54.27 42.91 36.00 54.09
S.D. 5.43 3.87 2.16 2.23 2.32 2.49 2.71 2.60 2.46 1.64 3.39 3.79 1.22
SKEW -0.83 -1.11 -0.18 -0.26 0.06 0.28 0.02 0.52 0.23 1.01 -1.01 -1.15 0.20
MAX 43.74 46.88 50.03 56.38 66.24 72.67 80.79 80.55 71.05 59.53 47.90 42.18 57.42
MIN 18.92 26.36 40.69 47.68 56.23 63.15 68.21 69.40 60.77 52.02 31.18 23.50 50.92
NO YRS 52 52 53 52 49 51 52 50 52 52 53 53 46