RICHLAND, WASHINGTON

Monthly Average Maximum 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 78.46 r 81.70 92.58 88.26 83.30 71.71 47.07 b 32.48 j 77.44
1945 43.10 50.32 55.13 66.37 79.03 85.10 a 98.10 95.77 81.30 73.90 53.93 43.23 68.77
1946 48.20 a 54.64 61.29 71.70 84.06 84.73 95.74 95.93 c 82.37 66.23 51.73 48.23 70.40
1947 41.68 53.54 67.29 73.90 88.45 80.17 91.97 90.23 83.90 66.00 52.27 43.06 69.37
1948 ----- z ----- z ----- z ----- z ----- z 87.80 88.52 87.97 84.72 e 68.26 53.53 38.94 72.82
1949 27.90 43.64 57.87 73.93 82.74 86.63 92.39 91.57 a 84.47 65.81 55.66 a 46.29 67.41
1950 23.94 40.93 54.26 64.43 75.71 80.87 93.84 93.77 87.10 63.39 48.87 45.94 64.42
1951 43.00 a 47.25 52.45 71.53 77.58 84.40 96.77 a 92.03 84.47 66.35 50.63 39.87 67.20
1952 35.35 49.83 58.68 72.67 79.23 82.67 95.29 86.42 87.07 76.35 46.33 42.97 67.74
1953 54.48 54.32 61.26 66.23 74.55 77.43 93.52 90.48 86.60 71.90 57.27 50.61 69.89
1954 42.58 48.25 56.61 66.57 78.29 79.87 90.68 86.77 81.30 66.00 57.73 44.90 66.63
1955 40.97 49.07 53.48 62.17 73.26 87.10 88.39 93.52 83.53 69.35 45.57 40.32 65.56
1956 43.03 35.90 57.35 73.00 80.55 82.67 95.68 92.00 a 84.80 66.06 47.47 45.26 66.98
1957 28.45 47.64 56.55 69.77 80.00 87.50 90.77 88.74 86.53 63.52 54.80 51.19 67.12
1958 48.10 56.50 57.52 65.87 85.74 90.43 98.16 98.45 82.13 71.71 54.90 44.97 71.21
1959 45.00 47.79 60.55 69.37 73.06 83.00 91.77 86.35 76.30 68.39 51.63 43.71 66.41
1960 32.97 49.79 58.13 66.07 71.71 84.13 96.39 85.06 80.40 69.13 55.70 37.77 65.60
1961 43.77 56.46 59.52 67.77 75.55 91.60 95.19 96.29 78.83 67.81 50.14 a 46.26 69.10
1962 43.77 49.61 55.61 71.40 71.00 84.10 90.87 87.77 83.70 66.61 56.53 46.71 67.31
1963 38.77 50.04 60.90 64.77 77.55 83.77 86.42 90.55 86.17 71.55 56.23 39.00 67.14
1964 47.77 53.79 57.23 65.67 73.48 81.33 90.32 83.58 77.87 67.39 48.23 37.87 65.38
1965 42.10 54.36 56.74 68.93 74.16 81.63 89.68 87.32 77.20 72.32 55.10 45.13 67.06
1966 45.45 51.96 59.61 69.87 78.84 81.07 88.06 89.97 83.77 68.94 56.43 49.35 68.61
1967 53.52 57.21 58.61 62.90 76.00 86.07 93.03 96.55 87.90 70.68 54.43 45.39 70.19
1968 48.48 55.03 62.74 66.30 76.23 83.67 93.32 84.55 80.50 65.58 52.67 42.10 67.60
1969 31.03 42.32 59.81 66.13 78.77 87.47 89.29 86.87 80.13 63.26 52.43 40.55 64.84
1970 39.03 50.11 57.58 61.80 75.45 86.33 91.16 90.23 75.43 65.29 50.33 42.29 65.42
1971 47.39 52.32 53.00 65.03 76.87 77.07 91.10 93.74 74.63 65.48 52.87 43.45 66.08
1972 42.58 45.72 60.26 63.77 76.52 82.93 88.84 91.48 76.43 67.23 49.87 38.97 65.38
1973 40.52 48.64 60.68 68.27 77.90 82.53 91.58 89.19 79.03 66.35 48.40 47.29 66.70
1974 38.19 52.75 58.03 64.77 71.65 87.27 88.94 90.65 84.70 68.03 52.30 47.97 67.10
1975 43.06 44.11 54.71 61.23 73.84 80.30 93.29 85.52 83.37 65.35 51.55 a 44.26 65.05
1976 44.94 49.10 55.81 63.70 76.55 79.27 89.16 84.94 84.47 68.10 52.77 41.39 65.85
1977 31.87 52.54 58.16 72.13 70.55 86.97 88.06 93.29 74.40 66.45 51.07 44.71 65.85
1978 39.45 47.93 60.90 64.53 72.13 84.53 89.90 a 86.84 76.80 67.74 43.43 39.90 64.51
1979 22.58 43.75 60.87 64.17 77.06 84.63 91.55 89.10 83.07 69.71 43.47 45.13 64.59
1980 34.13 41.76 56.39 69.47 74.13 77.03 89.42 85.39 ----- z 66.45 51.13 44.81 62.74
1981 44.03 49.29 61.58 65.50 73.81 77.43 88.35 94.23 80.83 65.52 54.37 42.32 66.44
1982 39.52 49.52 a 58.52 64.10 74.00 84.37 87.81 89.13 77.03 64.06 48.13 42.97 64.93
1983 48.00 51.50 60.16 66.27 78.03 79.87 84.45 90.13 75.43 66.00 53.97 31.71 65.46
1984 41.90 48.66 58.77 62.30 69.87 78.00 91.00 90.16 76.28 a 64.65 50.53 37.16 64.11
1985 32.13 44.21 59.03 70.76 a 79.23 86.03 98.74 87.81 74.20 67.06 37.73 27.65 63.72
1986 43.00 50.32 62.97 67.37 76.52 89.20 84.27 a 92.42 73.30 67.90 50.13 36.80 a 66.18
1987 37.68 50.00 59.77 70.83 78.65 85.70 87.54 r 87.26 83.90 68.48 52.07 37.00 64.67
1988 39.48 52.34 56.81 66.23 74.10 78.97 88.10 87.10 78.07 71.45 52.47 38.65 65.31
1989 46.10 34.93 53.26 68.33 71.58 82.90 86.35 83.39 80.27 65.90 52.93 37.77 63.64
1990 47.29 47.00 58.77 69.43 70.45 79.27 90.52 86.81 85.30 63.00 55.07 32.97 65.49
1991 35.94 53.43 54.16 64.80 69.19 74.30 88.13 89.71 81.53 66.48 47.37 43.84 64.07
1992 43.74 49.34 62.16 66.13 77.77 85.67 86.42 89.97 75.13 66.19 47.73 38.19 65.71
1993 29.26 36.75 50.58 62.93 78.97 79.83 79.71 84.03 79.97 67.00 45.83 40.65 61.29
1994 ----- z 43.21 61.77 67.87 74.74 79.63 92.48 ----- z ----- z 65.03 47.93 43.90 64.06
1995 39.94 52.61 ----- z ----- z 76.23 ----- z 87.71 ----- z ----- z ----- z 53.27 39.32 58.18
1996 38.84 41.55 54.87 65.80 67.74 79.20 90.32 87.35 76.57 63.61 46.73 37.71 62.53
1997 41.94 48.11 56.81 62.40 75.06 77.57 85.84 89.42 78.37 64.23 50.63 41.23 64.30
1998 42.87 51.07 57.26 65.37 72.74 81.10 93.03 92.26 84.93 63.97 ----- z 42.90 67.95
1999 46.48 50.61 55.97 64.27 70.48 77.67 85.55 88.03 78.90 64.58 54.97 45.39 65.24
2000 41.13 46.93 56.03 68.23 72.52 80.70 86.81 87.45 76.57 62.58 42.37 35.13 63.04
2001 37.61 45.61 57.61 61.93 77.77 76.87 86.71 89.45 ----- z 64.55 50.03 42.42 62.78
2002 45.42 49.86 53.84 65.70 70.58 82.93 91.29 87.19 79.87 64.55 49.53 43.52 65.36
2003 44.65 50.25 60.61 63.80 73.39 84.13 92.97 89.35 81.27 68.84 47.93 40.26 66.45
2004 34.84 45.76 63.00 68.60 71.65 82.37 91.10 88.32 76.93 66.26 49.87 43.68 65.20
2005 36.45 51.50 60.84 65.33 74.55 78.87 90.03 89.84 77.17 65.06 46.90 35.06 64.30
2006 46.97 47.14 56.29 64.07 74.81 80.97 92.68 87.94 79.30 63.71 49.73 36.32 64.99
2007 37.03 46.68 59.61 64.07 75.32 79.70 92.29 86.35 78.03 62.97 49.33 41.84 64.44
2008 37.13 ----- z 54.61 60.87 74.55 78.80 88.42 86.35 78.83 64.00 50.47 34.16 64.38
2009 39.13 43.79 52.29 64.40 74.97 81.83 91.58 87.84 81.07 59.81 51.47 33.42 63.47
2010 44.81 50.89 59.23 64.07 67.90 76.60 88.35 86.06 76.00 64.23 45.63 39.55 63.61
2011 42.87 46.32 54.97 59.13 68.32 77.07 a 84.52 88.87 82.86 a 63.74 50.30 38.84 63.15
2012 43.06 47.14 56.39 66.07 a 72.00 75.50 88.94 90.10 80.67 63.65 49.83 a 43.48 64.73
2013 36.68 50.52 a 57.94 76.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 48.38
Period of Record Statistics
MEAN 40.64 48.59 57.94 66.41 75.31 82.19 90.50 89.28 80.57 66.67 50.73 41.55 65.93
S.D. 6.30 4.66 3.08 3.35 4.03 3.80 3.60 3.29 3.80 2.98 3.83 4.56 2.01
SKEW -0.66 -0.77 0.11 0.42 0.65 0.20 -0.01 0.64 0.02 0.79 -0.63 -0.44 0.52
MAX 54.48 57.21 67.29 73.93 88.45 91.60 98.74 98.45 87.90 76.35 57.73 51.19 71.21
MIN 22.58 34.93 50.58 59.13 67.74 74.30 79.71 83.39 73.30 59.81 37.73 27.65 61.29
NO YRS 67 67 67 66 67 68 68 67 65 68 68 68 60