MONTEBELLO, CALIFORNIA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 67.6 73.2 78.2 85.4 93.1 102.1 105.8 104.7 99.9 89.7 76.8 67.8 87.0
Highest Mean Max. Temperature (F) 73.8 80.4 88.9 92.9 100.1 107.6 108.8 109.2 105.5 94.5 82.4 73.9 89.0
Year Highest Occurred 1986 1963 1972 1989 1984 1978 1972 1969 1979 1965 1967 1980 1981
Lowest Mean Max. Temperature (F) 60.8 67.9 72.3 77.1 86.7 95.1 101.8 101.6 92.8 83.3 72.2 62.4 85.5
Year Lowest Occurred 1979 1966 1973 1967 1977 1965 1986 1983 1985 1971 1964 1987 1982
Mean Temperature (F) 53.1 57.0 61.7 67.9 75.2 83.7 90.3 89.5 83.8 72.9 60.9 53.4 70.8
Highest Mean Temperature (F) 59.4 62.7 68.9 74.7 81.2 88.7 92.4 93.2 88.4 78.9 65.5 58.1 72.8
Year Highest Occurred 1986 1963 1972 1989 1984 1981 1989 1969 1983 1988 1967 1980 1981
Lowest Mean Temperature (F) 48.7 51.3 57.0 61.2 70.2 76.9 87.3 85.4 78.4 68.0 56.5 49.2 68.7
Year Lowest Occurred 1979 1964 1962 1967 1977 1965 1987 1979 1985 1971 1964 1978 1964
Mean Min. Temperature (F) 38.7 40.8 45.1 50.3 57.2 65.3 74.7 74.3 67.6 56.0 45.0 39.0 54.5
Highest Mean Min. Temperature (F) 44.9 46.1 50.8 56.4 62.2 70.9 77.6 79.5 75.5 64.1 48.9 43.6 56.7
Year Highest Occurred 1986 1968 1978 1989 1984 1981 1990 1986 1983 1988 1969 1977 1986
Lowest Mean Min. Temperature (F) 31.3 33.3 39.5 45.1 52.6 58.7 69.8 67.8 61.4 52.0 40.1 32.4 51.8
Year Lowest Occurred 1964 1964 1964 1970 1971 1965 1979 1979 1968 1979 1979 1968 1964
Mean Precipitation (in.) 0.41 0.28 0.28 0.13 0.03 0.03 0.30 0.70 0.35 0.37 0.27 0.46 3.61
Highest Precipitation (in.) 2.44 2.08 1.30 1.19 0.42 0.37 3.51 5.47 2.40 3.86 1.63 1.77 7.92
Year Highest Occurred 1979 1976 1973 1965 1979 1988 1989 1977 1967 1972 1969 1984 1977
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.32
Year Lowest Occurred 1975 1989 1990 1989 1990 1990 1988 1985 1990 1989 1990 1989 1962
Heating Degree Days (F) 369. 231. 149. 61. 0. 0. 0. 0. 0. 13. 146. 360. 1329.
Cooling Degree Days (F) 0. 7. 47. 148. 320. 561. 784. 760. 564. 258. 23. 0. 3472.

Western Regional Climate Center, wrcc@dri.edu