ICE HARBOR DAM, WASHINGTON

Monthly Average Temperature (Degrees Fahrenheit)

(453883)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201301
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
1957 ----- z ----- z 47.75 u 55.39 c 65.02 71.28 73.11 71.85 68.33 51.67 b 40.75 41.61 59.89
1958 37.82 46.04 44.10 52.12 67.26 73.65 79.58 79.87 65.53 54.53 42.10 36.40 56.58
1959 34.50 37.73 47.15 53.60 57.32 69.08 76.63 71.68 62.92 53.55 37.40 33.27 52.90
1960 23.89 38.71 45.23 53.88 59.06 69.75 81.37 72.40 66.55 56.13 43.80 31.03 53.48
1961 35.92 45.93 a 47.82 53.35 60.68 74.73 79.26 79.42 62.32 52.18 35.63 35.56 55.23
1962 31.47 38.04 42.73 a 56.62 a 57.68 67.78 75.18 72.94 66.83 54.35 45.55 38.66 53.99
1963 27.87 38.29 46.76 51.33 60.94 68.33 72.50 75.32 70.85 57.90 45.90 32.82 54.07
1964 39.34 40.33 44.00 51.43 59.23 67.18 75.45 70.52 63.75 53.13 41.25 31.29 53.07
1965 35.87 42.11 42.61 56.20 60.16 67.25 75.13 74.45 62.58 58.13 46.30 35.74 54.71
1966 37.31 39.71 46.85 54.28 63.19 66.92 73.08 74.74 69.52 55.31 45.68 40.81 55.62
1967 43.37 44.43 45.84 49.68 60.56 70.12 77.69 79.81 72.23 56.53 42.57 36.29 56.59
1968 37.26 42.55 49.34 51.28 61.50 68.95 78.02 72.50 66.57 52.71 43.02 33.69 54.78
1969 23.00 33.91 45.18 52.83 62.89 71.73 73.35 71.60 65.90 51.34 43.93 36.48 52.68
1970 33.79 41.86 45.13 49.30 60.34 70.58 76.39 74.05 61.35 51.92 41.98 36.05 53.56
1971 39.19 40.89 42.63 51.43 60.95 63.57 74.71 79.00 60.95 52.48 43.60 36.87 53.86
1972 35.08 37.40 48.48 48.68 61.26 67.37 73.48 ----- z 62.83 53.32 42.15 29.68 50.89
1973 30.98 38.34 47.71 52.72 61.23 67.50 74.65 73.56 64.65 54.27 42.00 40.56 54.01
1974 29.40 43.62 46.42 52.28 57.76 69.00 72.13 73.34 66.67 53.53 45.52 41.13 54.23
1975 35.94 36.07 43.53 48.03 58.69 64.67 76.37 70.42 64.93 54.56 42.53 a 37.60 52.78
1976 37.74 39.83 43.26 50.55 60.15 63.52 72.50 69.98 67.23 53.23 41.68 33.73 52.78
1977 27.31 41.54 45.13 57.13 56.40 70.07 71.82 76.13 61.38 51.74 40.80 37.35 53.07
1978 32.44 39.50 46.95 a 51.70 57.21 67.10 72.03 71.52 a 62.62 52.34 35.20 31.98 51.72
1979 18.56 d 36.36 45.61 51.98 ----- z 67.42 ----- z 73.63 66.65 57.40 38.71 a 39.32 a 49.56
1980 ----- z ----- z 44.32 54.52 59.58 63.42 73.24 70.26 65.93 52.65 a 44.38 38.90 56.72
1981 38.52 39.95 47.55 52.55 59.48 63.47 71.65 75.53 65.05 a 51.69 b 44.22 36.26 53.83
1982 32.13 39.66 44.84 49.08 58.89 68.15 72.85 73.61 64.32 52.48 39.33 36.13 52.62
1983 40.26 42.98 49.53 52.32 62.21 c 66.18 70.35 74.66 61.13 52.82 47.08 25.31 53.74
1984 34.29 40.17 48.18 51.63 ----- z 64.32 73.52 73.63 61.83 51.15 41.38 28.55 51.70
1985 27.55 32.70 44.56 55.05 62.06 68.25 78.55 ----- z 59.98 52.50 ----- z 22.55 a 50.38
1986 34.61 39.30 49.42 51.68 60.23 71.45 69.67 a 76.78 o 57.35 q 54.82 44.53 33.81 50.95
1987 31.87 40.14 47.87 57.15 64.05 69.52 73.00 72.87 68.77 54.08 45.22 34.68 54.93
1988 33.40 40.43 46.66 54.33 59.98 66.77 73.56 72.58 64.10 58.68 46.88 34.10 54.29
1989 38.63 27.00 44.16 54.77 59.60 69.57 73.10 71.56 65.37 53.82 46.07 35.23 53.24
1990 40.31 38.00 46.12 j 56.60 59.21 67.22 76.15 74.58 70.25 52.81 47.18 27.21 55.41
1991 30.00 44.30 43.90 52.80 58.19 63.42 74.48 76.31 ----- z 53.94 42.80 39.11 52.66
1992 39.44 43.10 ----- z 56.20 63.79 72.72 73.40 74.26 62.73 54.13 42.68 33.69 56.01
1993 24.21 30.25 40.47 k 53.18 64.55 ----- z 68.71 70.89 65.78 56.27 37.38 37.60 50.88
1994 40.19 36.62 48.24 56.72 ----- z 67.13 77.40 76.68 68.48 53.95 41.92 37.35 54.97
1995 34.19 43.12 45.60 52.25 60.97 65.33 73.71 69.82 67.15 52.18 46.00 35.73 53.84
1996 33.56 32.36 44.92 53.92 57.26 65.95 75.06 72.06 63.23 53.60 41.65 32.37 52.16
1997 34.55 39.93 47.40 51.22 62.03 65.95 72.65 75.10 65.62 53.58 43.67 37.71 54.12
1998 37.19 42.82 47.71 52.53 60.48 67.62 78.84 74.74 70.15 52.52 47.63 36.18 55.70
1999 41.19 43.21 46.16 50.35 56.90 65.97 70.65 72.95 63.55 52.42 47.20 41.29 54.32
2000 37.27 39.40 46.27 55.22 60.53 65.50 a 73.45 73.65 63.28 52.40 37.20 32.95 53.09
2001 34.16 36.77 47.06 51.42 61.61 64.58 74.00 b 75.17 a 67.30 53.03 44.95 a 38.96 c 54.08
2002 38.55 39.07 42.94 52.85 57.27 68.42 75.56 71.31 64.53 51.40 42.58 40.45 53.74
2003 40.87 40.48 50.47 53.60 59.74 69.53 77.26 75.29 67.23 58.37 39.83 36.94 55.80
2004 30.47 38.43 50.42 55.30 61.47 68.40 76.48 75.34 64.60 55.95 42.77 38.45 54.84
2005 32.92 38.04 49.58 ----- z 63.02 66.32 75.19 74.85 63.98 56.08 42.35 31.50 53.98
2006 43.09 i 36.84 45.81 53.07 61.05 68.25 77.77 72.94 65.77 53.58 44.05 33.23 55.67
2007 31.84 39.11 48.10 52.45 61.74 67.53 77.85 72.31 64.40 52.69 42.92 37.69 54.05
2008 31.56 41.52 44.85 48.48 60.82 65.33 75.29 72.39 63.78 52.11 44.92 30.40 52.62
2009 35.10 36.29 42.55 52.50 60.44 68.63 75.77 75.00 66.50 50.55 44.13 28.61 53.01
2010 39.24 41.89 47.53 50.83 57.34 65.18 73.05 72.44 64.92 54.66 41.58 35.84 53.71
2011 36.31 36.52 b 45.79 48.18 b 57.12 c 64.34 a 69.56 74.69 67.23 b 55.29 b 42.75 33.66 52.62
2012 35.79 38.93 b 46.42 53.77 59.12 a 64.21 a 74.60 73.81 ----- z 53.84 ----- z ----- z 55.61
2013 32.42 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 32.42
Period of Record Statistics
MEAN 34.27 39.31 46.18 52.77 60.38 67.57 74.56 73.77 65.29 53.79 42.88 35.10 53.90
S.D. 5.03 3.65 2.11 2.34 2.28 2.64 2.68 2.37 2.70 1.93 2.91 4.06 1.13
SKEW -0.86 -0.88 0.09 -0.03 0.51 0.46 0.21 0.72 0.38 0.87 -0.68 -0.78 0.53
MAX 43.37 46.04 50.47 57.15 67.26 74.73 81.37 79.87 72.23 58.68 47.63 41.61 56.59
MIN 18.56 27.00 42.55 48.03 56.40 63.42 68.71 69.82 59.98 50.55 35.20 22.55 51.72
NO YRS 54 54 52 55 53 55 55 53 53 56 54 55 41