ST HELENS RFD, OREGON

Monthly Average Temperature (Degrees Fahrenheit)

(357466)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1976 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 64.43 c 62.57 54.23 47.83 40.31 53.87
1977 35.90 b 45.84 45.11 53.02 53.66 63.32 65.13 71.34 60.67 53.81 44.15 42.73 52.89
1978 41.65 ----- z 50.10 51.62 55.45 a 65.58 68.67 a 67.29 61.17 56.34 40.73 36.15 54.07
1979 31.55 40.77 50.02 51.48 59.19 63.22 69.08 67.32 ----- z ----- z 44.83 44.32 52.18
1980 35.02 42.79 a 45.46 e 52.27 b 54.29 c 58.00 g 68.75 k 64.41 b 62.91 b 55.46 g 46.93 42.50 f 50.51
1981 43.83 g 43.45 h 49.22 d 52.48 a 56.22 a 60.48 d 64.52 g 71.96 h 64.02 a 52.50 c 47.76 g 41.90 g 55.82
1982 38.66 43.02 45.31 48.17 57.63 65.12 64.66 66.90 62.90 54.73 43.10 40.88 e 52.59
1983 42.48 h 45.95 50.21 52.07 60.13 61.27 65.27 67.84 60.03 52.52 47.35 c 35.42 a 54.37
1984 41.40 44.71 50.34 49.48 55.27 60.82 68.47 67.58 62.75 51.55 45.25 37.13 52.90
1985 36.55 40.29 45.90 53.75 57.88 a 64.23 72.48 67.79 60.07 52.31 36.64 e 33.76 51.80
1986 43.58 45.11 53.06 50.93 57.47 66.70 64.74 72.05 ----- z 56.69 46.37 40.68 54.31
1987 38.81 46.20 49.65 54.83 60.69 66.33 66.58 70.74 66.28 59.58 48.62 39.23 55.63
1988 39.40 44.95 47.84 53.23 56.50 b 63.20 69.47 69.37 64.38 59.48 46.85 41.26 54.66
1989 42.19 36.12 44.74 55.15 58.00 65.25 66.00 66.18 66.75 55.52 48.77 41.27 53.83
1990 43.02 41.32 50.37 55.45 56.39 63.85 71.27 71.13 68.15 53.02 46.45 34.19 54.55
1991 39.35 48.27 46.34 51.95 55.66 61.10 70.23 69.60 68.22 56.53 48.31 a 41.76 54.78
1992 43.84 48.00 m 53.39 56.39 c 64.34 67.68 71.15 70.55 62.86 b 57.58 46.07 39.40 57.57
1993 37.17 a 41.07 49.03 52.12 62.61 62.32 63.92 68.90 66.28 57.24 40.10 39.89 53.39
1994 44.24 j 38.82 50.68 54.63 61.71 63.42 71.48 69.58 67.90 53.05 41.02 41.90 55.84
1995 43.24 47.23 48.24 51.38 61.61 64.47 70.97 67.60 68.80 54.16 49.97 40.98 a 55.72
1996 40.48 41.60 48.77 53.73 56.63 65.17 73.58 71.34 62.73 53.90 45.27 42.39 54.63
1997 40.77 45.27 46.90 51.45 62.82 62.77 68.23 g 72.13 64.97 n 54.05 a 48.70 40.11 52.50
1998 42.24 46.39 50.29 53.38 56.50 65.07 71.81 72.00 67.90 55.37 47.07 40.29 55.69
1999 42.55 c 43.41 a 46.59 c 53.10 54.88 b 60.73 b 67.59 d 71.96 e 68.69 i 54.87 e 46.63 d 41.87 53.11
2000 38.23 a 42.92 c 44.81 b 54.38 b 56.31 d 65.85 68.06 70.30 d 65.61 c 53.90 g 43.14 a 38.75 a 53.49
2001 41.17 a 42.27 b 47.72 a 50.28 c 62.11 i 61.79 b 66.96 d 69.86 b 64.77 h 54.78 f 46.50 g 41.88 g 54.29
2002 40.42 k 44.58 h 46.44 o 50.28 56.45 64.46 c 70.82 69.06 64.37 k 54.76 46.23 42.26 56.79
2003 44.19 43.75 47.71 g 50.10 57.32 67.20 72.06 70.20 c 64.98 e 57.84 c 44.57 p 40.48 d 56.81
2004 37.83 m 45.60 n 51.19 d 55.97 55.61 d 65.64 e 72.04 g 70.02 60.37 k 55.02 e 42.03 j 41.20 h 58.91
2005 ----- z 42.69 d 50.10 51.63 g 60.48 61.00 g 70.84 70.66 f 61.22 l 56.08 k 44.07 39.45 51.27
2006 44.66 f 40.65 e 46.10 53.83 ----- z 65.74 k 67.77 66.63 62.95 51.31 g 44.00 c 37.63 52.45
2007 35.47 a 41.52 46.85 47.23 f 55.65 59.79 b 67.81 64.78 a 60.09 a 51.13 a 43.32 39.09 c 51.41
2008 36.35 41.64 41.24 45.15 55.56 e 58.35 d 65.72 h 66.15 62.63 57.38 w 46.48 d 35.73 a 48.93
2009 36.81 39.29 41.62 b 46.97 56.08 a 60.90 a ----- z ----- z ----- z ----- z ----- z ----- z 46.94
2010 ----- z ----- z ----- z ----- z ----- z 56.96 e 64.13 e 67.25 e 60.12 53.47 42.65 40.40 55.00
2011 39.47 37.22 c 43.95 44.45 a 51.80 c 58.41 b 62.93 b 65.84 f 65.33 f 50.95 c 42.59 b 37.19 e 46.90
2012 38.56 d 40.96 e 42.50 d 49.08 d 54.81 e 58.45 i 65.28 h 67.05 i 63.05 k 52.62 g 46.62 b 40.26 d 44.68
2013 34.87 e 41.68 f 45.52 e 58.50 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.19
Period of Record Statistics
MEAN 39.40 42.73 47.62 51.90 57.44 63.17 68.41 68.82 63.99 54.72 45.19 39.60 54.08
S.D. 3.22 2.91 3.04 2.87 2.91 2.72 2.96 2.30 2.85 2.31 2.93 2.54 1.28
SKEW -0.40 -0.20 -0.22 -0.83 0.66 -0.42 -0.14 -0.29 0.20 0.40 -0.85 -0.68 -0.23
MAX 44.19 48.27 53.39 56.39 64.34 67.68 73.58 72.13 68.80 59.58 49.97 44.32 55.72
MIN 31.55 36.12 41.24 44.45 51.80 56.96 62.93 64.41 60.03 50.95 36.64 33.76 51.80
NO YRS 29 30 34 33 33 32 29 32 26 28 32 32 13