RICHLAND, WASHINGTON

Monthly Average Temperature (Degrees Fahrenheit)

(457015)

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
1944 ----- z ----- z ----- z ----- z 64.54 r 67.63 76.66 72.66 67.08 56.85 40.25 b 29.07 j 63.52
1945 37.81 41.66 45.35 53.48 64.42 69.53 a 79.27 77.45 65.13 57.56 43.78 35.60 55.92
1946 37.32 a 42.07 49.13 56.02 66.08 69.32 78.29 76.17 h 66.15 52.83 a 41.18 38.44 54.26
1947 32.26 41.18 51.23 57.42 70.15 67.22 76.35 73.71 68.38 57.02 44.53 36.74 56.35
1948 ----- z ----- z ----- z ----- z ----- z 73.03 71.60 72.56 67.42 e 50.74 l 43.30 30.61 59.75
1949 15.60 33.43 45.53 56.32 66.73 69.10 75.37 74.50 a 67.95 50.52 46.31 a 37.66 53.25
1950 15.85 31.82 43.63 51.02 59.68 67.77 75.48 76.68 68.13 52.79 42.28 a 40.06 52.10
1951 35.67 a 37.82 41.65 55.07 62.71 69.73 78.62 a 74.94 67.50 55.11 41.80 31.77 54.37
1952 28.79 40.59 47.16 57.55 65.13 69.48 78.21 75.40 69.93 60.11 36.98 37.79 55.59
1953 46.89 44.38 49.73 54.03 61.42 65.27 76.61 75.11 69.35 57.74 47.18 42.95 57.55
1954 33.82 42.18 44.24 53.82 63.52 66.80 74.97 72.39 65.17 51.74 48.50 37.63 54.56
1955 34.82 39.21 42.90 50.25 59.24 71.35 73.55 75.35 67.42 56.48 36.42 33.11 53.34
1956 35.26 28.53 46.35 57.48 65.97 67.52 78.48 74.62 a 67.85 54.21 39.53 37.94 54.48
1957 20.79 37.95 46.06 55.93 66.05 71.83 75.18 73.31 69.83 52.82 43.25 43.05 54.67
1958 40.58 47.64 45.97 54.07 70.13 75.33 81.97 80.69 67.93 56.16 45.40 38.61 58.71
1959 36.44 39.32 47.95 55.43 59.61 68.82 75.77 71.53 64.23 55.48 40.37 36.74 54.31
1960 25.74 40.41 46.73 54.47 59.81 69.33 79.77 71.58 65.73 56.60 45.27 32.32 53.98
1961 37.29 47.89 49.23 55.10 62.21 74.83 78.21 79.58 63.88 53.87 38.40 a 37.74 56.52
1962 34.18 39.98 44.71 57.35 59.53 68.78 75.03 72.66 67.60 54.92 47.28 40.58 55.22
1963 29.85 41.36 48.18 53.33 63.18 69.68 72.13 74.77 70.75 58.19 47.27 33.39 55.17
1964 39.73 41.00 45.15 52.38 59.89 67.93 74.77 69.92 64.10 54.29 41.78 30.95 53.49
1965 36.47 43.96 43.66 56.17 60.42 68.07 74.68 74.10 63.70 58.77 47.57 37.19 55.40
1966 38.56 42.41 47.42 55.85 63.45 66.97 72.60 73.63 68.53 54.95 46.68 41.24 56.02
1967 44.29 46.02 47.02 50.35 61.24 70.92 75.77 78.00 70.45 57.18 44.38 37.00 56.88
1968 38.90 44.09 50.05 52.58 62.61 69.20 76.84 70.77 66.32 52.97 44.10 34.40 55.24
1969 23.68 34.61 46.48 53.98 64.40 73.38 73.08 69.82 65.05 49.65 42.05 35.68 52.66
1970 32.82 41.14 44.77 49.33 60.52 71.35 75.60 72.58 60.53 50.39 40.77 33.69 52.79
1971 38.50 40.18 41.84 51.73 62.42 63.92 74.39 76.85 59.92 51.79 42.72 34.48 53.23
1972 34.19 37.33 47.85 50.32 62.66 68.83 73.42 74.65 61.15 51.95 41.75 30.73 52.90
1973 31.03 38.80 47.50 53.40 62.08 67.75 74.47 71.90 64.78 54.02 41.93 40.82 54.04
1974 30.74 43.75 46.98 53.82 59.40 71.77 73.98 74.94 67.97 53.65 44.88 40.03 55.16
1975 35.77 35.29 44.24 49.03 60.10 66.72 77.89 71.31 66.25 54.61 42.24 a 36.87 53.36
1976 36.27 39.83 43.95 51.67 61.18 65.47 73.50 71.44 68.83 53.35 42.10 32.69 53.36
1977 27.18 42.64 47.53 57.76 a 59.18 73.22 74.39 79.08 63.00 53.21 42.78 38.06 54.84
1978 34.18 40.84 49.55 53.87 59.87 70.50 75.55 a 73.16 64.35 52.68 35.00 31.77 53.44
1979 15.26 36.21 47.92 52.97 63.34 69.85 76.40 75.13 68.55 57.68 37.82 39.29 53.37
1980 27.08 36.16 46.48 56.10 62.05 65.72 74.95 71.02 ----- z 53.90 43.75 38.48 52.34
1981 39.00 40.89 49.44 53.97 61.40 65.95 73.31 77.23 66.08 52.42 44.18 35.19 54.92
1982 32.84 40.07 a 46.73 51.25 60.05 70.12 72.97 73.52 63.80 51.69 38.72 35.61 53.11
1983 39.94 43.11 50.31 52.58 63.18 67.03 72.29 76.32 60.50 51.89 46.05 24.85 54.00
1984 33.48 40.53 48.56 50.93 57.00 65.12 75.16 73.94 61.88 a 51.05 42.16 a 29.02 b 52.40
1985 27.61 33.48 45.92 56.67 a 64.13 70.32 80.16 72.10 61.30 54.27 30.33 23.66 51.66
1986 35.65 41.25 50.95 52.43 a 61.97 73.28 70.40 a 77.05 62.58 54.85 44.47 32.74 b 54.80
1987 31.98 41.11 49.10 57.45 64.79 70.32 74.62 r 71.95 67.43 53.21 44.22 32.27 53.08
1988 33.13 40.86 46.19 54.58 60.85 66.82 73.39 71.73 63.58 57.66 45.40 32.90 53.93
1989 38.73 26.43 44.34 56.22 59.90 69.60 72.35 70.60 64.80 53.21 45.07 33.55 52.90
1990 40.89 37.77 46.52 56.43 58.87 67.30 75.94 74.05 69.78 52.08 46.72 26.02 54.36
1991 28.58 43.25 43.56 52.85 58.16 62.80 73.73 75.58 66.33 52.55 41.48 38.27 53.10
1992 37.79 41.48 49.21 54.60 63.11 71.83 73.23 74.44 62.02 53.65 41.17 31.27 54.48
1993 23.73 30.71 41.13 52.38 65.76 67.10 68.02 70.44 64.52 54.26 35.75 36.34 50.84
1994 ----- z 36.23 48.56 56.33 62.37 66.50 76.56 ----- z ----- z 53.52 40.07 37.26 53.05
1995 33.68 43.50 ----- z ----- z 63.02 ----- z 74.00 ----- z ----- z ----- z 44.98 34.69 48.98
1996 32.18 32.12 44.32 54.18 56.48 65.43 74.76 72.11 63.00 52.92 39.12 31.06 51.47
1997 33.94 39.80 46.66 51.08 62.35 65.67 72.02 75.29 65.53 52.98 42.88 35.00 53.60
1998 36.00 42.07 47.03 52.18 60.94 68.23 78.71 76.18 69.67 51.92 ----- z 34.85 56.16
1999 39.56 42.62 45.60 50.78 57.42 65.70 71.15 74.45 62.90 52.13 46.47 39.61 54.03
2000 35.11 38.81 45.24 55.05 60.95 67.25 72.48 72.92 63.48 51.52 35.67 31.19 52.47
2001 33.50 36.98 45.77 a 51.33 62.73 64.75 73.06 74.84 ----- z 53.50 42.72 36.50 52.33
2002 38.74 38.95 43.63 53.40 58.44 69.03 76.10 72.45 64.97 50.82 41.57 38.81 53.91
2003 39.47 40.21 50.27 53.28 60.71 69.53 76.77 74.56 67.12 57.35 39.15 35.03 55.29
2004 30.40 37.64 50.53 54.78 60.79 69.05 76.56 75.18 64.18 54.98 41.00 37.19 54.36
2005 31.44 38.27 47.73 53.75 62.77 66.80 74.98 74.10 63.70 55.05 40.30 29.84 53.23
2006 40.71 37.29 45.84 52.48 61.21 68.35 77.24 72.45 64.87 52.18 42.20 31.37 53.85
2007 30.13 39.39 48.24 52.25 61.24 66.80 77.58 71.79 64.37 52.27 40.83 35.65 53.38
2008 30.52 ----- z 44.18 48.80 61.98 65.55 74.05 72.27 64.73 51.98 43.03 27.55 53.15
2009 32.98 36.07 42.68 51.80 60.97 69.20 76.34 74.03 66.75 50.27 42.43 26.34 52.49
2010 39.03 42.16 46.89 52.90 56.40 65.13 73.74 72.58 64.85 53.95 38.42 34.45 53.38
2011 35.79 37.14 45.02 48.10 56.26 64.95 a 70.32 74.18 67.69 a 54.48 40.32 32.29 52.21
2012 34.42 38.88 45.90 53.88 a 59.10 64.18 74.40 74.31 65.55 52.89 43.41 a 37.84 53.73
2013 31.87 40.20 a 46.81 58.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 39.63
Period of Record Statistics
MEAN 33.53 39.42 46.52 53.61 61.73 68.44 75.08 73.95 65.68 53.93 42.23 34.92 54.07
S.D. 6.20 4.03 2.36 2.36 2.83 2.68 2.53 2.30 2.63 2.28 3.41 4.16 1.48
SKEW -1.02 -0.82 -0.08 -0.16 0.60 0.39 0.08 0.59 -0.12 0.56 -0.74 -0.51 0.65
MAX 46.89 47.89 51.23 57.76 70.15 75.33 81.97 80.69 70.75 60.11 48.50 43.05 58.71
MIN 15.26 26.43 41.13 48.10 56.26 62.80 68.02 69.82 59.92 49.65 30.33 23.66 50.84
NO YRS 67 67 67 66 67 68 68 66 65 67 68 68 59