DUNCAN, ARIZONA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 58.8 64.0 70.0 78.6 86.9 95.6 96.1 93.5 88.3 79.3 67.5 58.7 78.1
Highest Mean Max. Temperature (F) 68.7 69.0 78.9 88.3 92.1 102.4 101.5 97.8 93.8 86.8 72.6 66.6 82.8
Year Highest Occurred 1986 1989 1989 1989 1989 1990 1980 1989 1989 1987 1981 1980 1989
Lowest Mean Max. Temperature (F) 53.3 56.8 63.2 71.0 83.0 89.5 91.6 87.5 84.1 71.6 60.4 51.2 75.8
Year Lowest Occurred 1985 1966 1973 1983 1965 1965 1968 1968 1961 1970 1961 1967 1968
Mean Temperature (F) 40.8 44.9 50.3 57.3 65.6 74.5 79.9 77.6 71.2 60.0 48.4 40.9 59.3
Highest Mean Temperature (F) 45.4 49.2 56.4 62.9 69.3 81.1 83.3 80.5 75.8 65.0 52.2 44.5 61.3
Year Highest Occurred 1969 1968 1972 1989 1974 1990 1980 1986 1983 1988 1965 1977 1981
Lowest Mean Temperature (F) 34.8 37.4 45.7 51.3 62.3 70.4 77.0 73.7 68.7 54.8 44.1 37.9 57.3
Year Lowest Occurred 1964 1964 1977 1983 1975 1965 1976 1968 1968 1970 1979 1976 1976
Mean Min. Temperature (F) 22.8 25.6 30.6 36.0 44.2 53.3 63.6 61.7 54.1 40.7 29.2 23.0 40.4
Highest Mean Min. Temperature (F) 29.3 33.2 36.2 42.0 48.3 59.8 67.1 65.9 60.8 48.1 34.9 30.6 42.9
Year Highest Occurred 1969 1968 1968 1990 1974 1990 1981 1969 1983 1972 1965 1965 1969
Lowest Mean Min. Temperature (F) 14.1 16.1 23.4 30.3 39.8 47.3 58.0 56.7 48.6 33.9 21.3 15.7 36.6
Year Lowest Occurred 1964 1964 1977 1979 1983 1976 1987 1979 1988 1982 1975 1976 1976
Mean Precipitation (in.) 0.86 0.74 0.54 0.23 0.22 0.35 2.40 1.95 1.27 1.10 0.71 1.21 11.58
Highest Precipitation (in.) 2.43 3.12 1.73 1.33 0.82 2.59 6.10 3.76 2.80 4.40 2.24 4.23 18.88
Year Highest Occurred 1978 1980 1983 1988 1973 1987 1977 1968 1962 1972 1961 1965 1983
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.77 0.11 0.00 0.00 0.00 0.00 7.81
Year Lowest Occurred 1972 1972 1971 1986 1988 1989 1966 1962 1973 1973 1989 1981 1989
Heating Degree Days (F) 750. 563. 456. 244. 54. 0. 0. 0. 0. 174. 498. 747. 3486.
Cooling Degree Days (F) 0. 0. 0. 13. 73. 290. 462. 391. 190. 19. 0. 0. 1438.

Western Regional Climate Center, wrcc@dri.edu