SUNNYSIDE, WASHINGTON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 39.9 48.6 58.2 65.9 74.4 82.4 89.0 88.4 79.3 67.1 50.6 39.8 65.3
Highest Mean Max. Temperature (F) 50.5 56.8 62.6 72.3 78.7 88.7 97.0 95.6 87.3 75.8 56.9 46.4 68.9
Year Highest Occurred 1967 1967 1981 1977 1987 1986 1985 1967 1967 1988 1990 1966 1967
Lowest Mean Max. Temperature (F) 23.2 37.9 51.7 59.4 67.9 75.5 83.5 81.9 72.5 62.8 37.7 26.9 62.7
Year Lowest Occurred 1979 1989 1971 1967 1962 1971 1963 1968 1986 1968 1985 1985 1985
Mean Temperature (F) 32.1 38.5 45.6 52.2 59.8 67.5 72.2 71.4 63.0 52.0 40.9 32.4 52.3
Highest Mean Temperature (F) 40.5 43.5 49.7 57.4 63.0 72.8 78.0 75.6 69.0 60.1 45.6 38.7 54.6
Year Highest Occurred 1967 1961 1986 1990 1987 1986 1985 1977 1990 1988 1988 1966 1967
Lowest Mean Temperature (F) 15.9 28.6 40.6 47.5 55.8 62.5 67.7 66.8 58.3 48.8 28.9 22.5 50.0
Year Lowest Occurred 1979 1989 1971 1967 1962 1971 1963 1964 1970 1969 1985 1985 1985
Mean Min. Temperature (F) 24.3 28.3 33.0 38.5 45.2 52.5 55.3 54.3 46.7 36.8 31.2 24.9 39.3
Highest Mean Min. Temperature (F) 32.8 33.8 38.4 42.9 47.8 57.7 59.9 58.3 51.1 44.3 36.7 31.0 41.2
Year Highest Occurred 1981 1961 1983 1989 1972 1969 1990 1977 1990 1988 1983 1966 1988
Lowest Mean Min. Temperature (F) 8.6 19.3 29.0 34.4 42.5 47.6 51.8 50.0 42.7 34.1 20.0 17.4 37.3
Year Lowest Occurred 1979 1989 1962 1982 1977 1976 1963 1969 1970 1978 1985 1990 1985
Mean Precipitation (in.) 0.86 0.55 0.55 0.49 0.50 0.37 0.15 0.32 0.44 0.47 0.92 1.07 6.69
Highest Precipitation (in.) 2.86 1.71 2.12 1.59 2.40 1.28 1.03 1.41 2.62 1.77 3.20 3.02 12.65
Year Highest Occurred 1970 1961 1983 1963 1972 1980 1966 1977 1986 1982 1973 1964 1983
Lowest Precipitation (in.) 0.06 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 2.84
Year Lowest Occurred 1984 1988 1968 1985 1966 1987 1990 1988 1990 1988 1990 1976 1976
Heating Degree Days (F) 1020. 742. 601. 384. 173. 50. 9. 16. 125. 403. 723. 1011. 5257.
Cooling Degree Days (F) 0. 0. 0. 0. 12. 125. 232. 214. 65. 0. 0. 0. 648.

Western Regional Climate Center, wrcc@dri.edu