TUCSON WFO, ARIZONA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 66.3 70.3 74.5 82.6 90.9 100.1 100.5 98.7 94.8 85.9 74.5 66.8 83.8
Highest Mean Max. Temperature (F) 74.8 75.9 84.3 91.5 95.5 104.2 103.2 103.4 99.3 90.9 79.5 74.7 86.4
Year Highest Occurred 1986 1972 1972 1989 1984 1974 1978 1969 1973 1973 1970 1980 1989
Lowest Mean Max. Temperature (F) 58.2 63.8 66.7 74.8 87.4 96.1 96.0 93.9 91.4 79.1 69.4 61.3 81.8
Year Lowest Occurred 1979 1966 1973 1983 1980 1965 1986 1990 1985 1971 1985 1974 1983
Mean Temperature (F) 52.9 56.2 60.2 67.3 75.4 84.6 87.7 86.0 81.8 71.6 60.4 53.6 69.8
Highest Mean Temperature (F) 61.0 60.4 67.6 75.9 81.1 89.6 90.7 89.7 86.0 77.0 64.0 61.7 72.8
Year Highest Occurred 1986 1989 1972 1989 1984 1990 1980 1969 1979 1988 1981 1980 1989
Lowest Mean Temperature (F) 47.4 48.1 53.9 61.4 69.7 77.2 85.1 82.4 77.8 66.4 54.8 50.0 66.0
Year Lowest Occurred 1964 1964 1964 1967 1965 1965 1990 1971 1965 1971 1964 1978 1964
Mean Min. Temperature (F) 39.4 42.1 45.9 52.0 59.7 69.1 74.8 73.4 68.7 57.2 46.4 40.4 55.8
Highest Mean Min. Temperature (F) 48.4 47.7 52.7 60.2 66.7 75.1 78.8 77.5 73.1 65.5 50.9 48.6 60.0
Year Highest Occurred 1981 1981 1986 1989 1984 1990 1980 1981 1979 1987 1987 1980 1981
Lowest Mean Min. Temperature (F) 28.8 29.3 37.0 43.7 50.4 58.2 71.3 68.6 61.5 49.2 37.3 33.2 49.0
Year Lowest Occurred 1964 1964 1964 1967 1965 1965 1967 1963 1965 1966 1964 1966 1964
Mean Precipitation (in.) 0.95 0.83 0.85 0.37 0.17 0.25 2.22 2.02 1.26 1.10 0.72 1.30 12.04
Highest Precipitation (in.) 3.22 2.79 2.38 1.57 0.84 1.59 7.56 4.89 3.78 5.78 1.78 7.27 19.74
Year Highest Occurred 1979 1966 1973 1988 1978 1972 1984 1971 1966 1983 1978 1965 1983
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.45 0.52 0.00 0.00 0.00 0.00 6.93
Year Lowest Occurred 1972 1984 1984 1989 1990 1989 1987 1976 1979 1982 1980 1981 1989
Heating Degree Days (F) 380. 259. 199. 76. 0. 0. 0. 0. 0. 17. 158. 358. 1447.
Cooling Degree Days (F) 5. 13. 51. 145. 327. 588. 704. 651. 504. 221. 20. 0. 3229.

Western Regional Climate Center, wrcc@dri.edu