ALTENBERN, COLORADO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 35.8 42.8 52.9 62.0 71.7 83.3 88.8 85.9 77.4 65.0 48.4 37.5 62.6
Highest Mean Max. Temperature (F) 46.7 50.9 60.9 69.6 77.9 89.1 92.2 89.0 83.2 71.9 58.8 47.7 92.2
Year Highest Occurred 1981 1995 1999 1992 2000 1990 1989 1996 1979 1988 1999 1980 1989
Lowest Mean Max. Temperature (F) 25.2 35.8 46.2 55.6 63.7 76.8 85.4 81.8 71.2 56.5 41.3 27.6 25.2
Year Lowest Occurred 1979 1974 1979 1975 1995 1995 1995 1987 1986 1984 1979 1978 1979
Mean Temperature (F) 23.3 30.0 38.7 45.8 54.5 63.2 69.3 67.4 59.3 48.3 34.8 24.9 46.6
Highest Mean Temperature (F) 32.1 37.6 44.5 52.1 58.9 67.6 71.8 71.3 65.2 54.0 39.8 34.9 71.8
Year Highest Occurred 1981 1995 1986 1989 1989 1981 1989 2000 1990 1988 1999 1980 1989
Lowest Mean Temperature (F) 14.2 20.4 33.2 41.1 49.8 57.8 66.3 64.1 53.4 44.2 28.3 15.4 14.2
Year Lowest Occurred 1973 1974 1977 1975 1975 1975 1995 1975 1971 1984 1979 1978 1973
Mean Min. Temperature (F) 10.7 17.2 24.4 29.5 37.2 43.1 49.8 48.8 41.1 31.5 21.1 12.2 30.6
Highest Mean Min. Temperature (F) 18.9 25.9 29.6 36.1 43.1 48.2 53.4 53.9 47.7 36.2 25.2 22.1 53.9
Year Highest Occurred 1980 1986 1986 1989 1989 1988 1981 2000 1990 1988 1981 1980 2000
Lowest Mean Min. Temperature (F) 1.3 4.9 17.8 24.5 32.1 37.0 45.3 43.1 34.0 25.7 15.2 3.1 1.3
Year Lowest Occurred 1973 1974 1977 1974 1975 1975 1993 1975 1971 1976 2000 1978 1973
Mean Precipitation (in.) 1.13 1.29 1.65 1.51 1.81 0.97 1.35 1.36 1.64 1.82 1.41 1.06 17.00
Highest Precipitation (in.) 4.04 3.45 3.55 4.16 4.23 3.60 3.20 3.17 5.09 4.30 4.59 3.04 5.09
Year Highest Occurred 1980 1996 1978 1999 1992 1984 1986 1986 1997 1984 1985 1984 1997
Lowest Precipitation (in.) 0.00 0.00 0.09 0.20 0.00 0.01 0.15 0.18 0.06 0.12 0.03 0.14 0.00
Year Lowest Occurred 1972 1972 1972 1981 1974 1980 1993 1978 1979 1978 1976 1976 1972
Heating Degree Days (F) 1295. 981. 817. 578. 330. 118. 9. 39. 196. 519. 908. 1244. 7034.
Cooling Degree Days (F) 0. 0. 0. 0. 4. 64. 142. 111. 24. 0. 0. 0. 345.

Western Regional Climate Center, wrcc@dri.edu