YAKIMA WSO AP, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 37.7 45.6 56.0 64.1 72.4 79.6 87.2 86.5 77.6 64.3 47.7 37.1 63.0
Highest Mean Max. Temperature (F) 45.6 54.3 62.8 70.4 78.9 85.8 93.5 93.0 84.1 71.7 54.7 44.2 93.5
Year Highest Occurred 1994 1991 1992 1977 1992 1992 1985 1971 1990 1988 1990 1973 1985
Lowest Mean Max. Temperature (F) 23.7 36.3 49.9 59.7 66.6 74.1 78.5 80.8 70.5 60.8 33.3 24.1 23.7
Year Lowest Occurred 1979 1989 1971 1982 1984 1991 1993 1976 1985 1985 1985 1985 1979
Mean Temperature (F) 29.1 35.2 42.5 48.7 56.2 62.9 69.1 68.3 60.0 48.6 37.0 28.8 48.9
Highest Mean Temperature (F) 38.4 41.5 48.1 53.4 61.5 70.0 76.1 72.6 65.4 55.1 42.9 35.5 76.1
Year Highest Occurred 1981 1991 1992 1990 1993 1992 1998 1986 1990 1988 1999 1999 1998
Lowest Mean Temperature (F) 13.3 26.4 36.8 43.5 50.2 57.6 63.0 64.1 53.7 45.3 21.7 17.7 13.3
Year Lowest Occurred 1979 1989 1971 1972 1984 1976 1993 1985 1985 1985 1985 1985 1979
Mean Min. Temperature (F) 20.5 24.7 28.9 33.2 40.0 46.2 50.9 50.1 42.3 32.9 26.3 20.5 34.7
Highest Mean Min. Temperature (F) 32.3 30.9 33.4 38.1 45.4 54.1 59.7 54.9 47.3 38.4 32.8 27.7 59.7
Year Highest Occurred 1981 1992 1992 1994 1993 1992 1998 1997 1998 1988 1999 1993 1998
Lowest Mean Min. Temperature (F) 2.9 15.5 22.8 25.8 33.8 39.7 46.2 45.2 34.5 28.4 10.0 7.6 2.9
Year Lowest Occurred 1979 1985 1976 1972 1984 1971 1972 1985 1971 1971 1985 1984 1979
Mean Precipitation (in.) 1.17 0.80 0.70 0.53 0.51 0.62 0.22 0.36 0.39 0.53 1.05 1.38 8.26
Highest Precipitation (in.) 3.68 1.81 1.95 1.83 1.24 2.53 0.69 2.10 2.07 1.72 2.83 5.59 5.59
Year Highest Occurred 1995 1996 1983 1995 1996 1991 1995 1975 1986 1997 1973 1996 1996
Lowest Precipitation (in.) 0.09 0.00 0.01 0.00 0.04 0.02 0.00 0.00 0.00 0.00 0.00 0.07 0.00
Year Lowest Occurred 1985 1988 1973 1985 1992 1973 1988 2000 1999 1978 1990 1976 1988
Heating Degree Days (F) 1097. 821. 682. 474. 275. 112. 28. 30. 162. 493. 824. 1106. 6104.
Cooling Degree Days (F) 0. 0. 0. 1. 18. 65. 171. 148. 28. 0. 0. 0. 431.

Western Regional Climate Center, wrcc@dri.edu