BLOCK ISLAND STATE AP, RHODE ISLAND

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 37.0 37.0 43.7 52.0 61.2 70.2 76.4 76.4 69.5 60.6 51.7 42.1 56.5
Highest Mean Max. Temperature (F) 43.6 45.4 48.4 60.5 66.5 76.5 79.1 79.7 74.7 65.5 56.4 50.7 58.8
Year Highest Occurred 1990 1976 1977 1976 1977 1976 1983 1990 1983 1971 1975 1984 1983
Lowest Mean Max. Temperature (F) 29.7 27.3 38.7 48.7 54.7 67.6 73.5 73.6 64.8 56.2 44.7 33.5 54.6
Year Lowest Occurred 1981 1979 1967 1966 1967 1982 1978 1981 1963 1976 1976 1989 1967
Mean Temperature (F) 30.8 31.0 37.7 45.6 54.8 63.6 70.0 70.1 63.7 54.7 46.1 36.1 50.4
Highest Mean Temperature (F) 37.6 37.9 42.1 52.0 58.1 69.4 72.7 73.4 67.7 59.7 51.4 43.9 52.2
Year Highest Occurred 1990 1984 1973 1976 1976 1976 1980 1990 1961 1971 1979 1984 1983
Lowest Mean Temperature (F) 23.9 22.1 33.7 42.7 49.0 61.1 67.3 66.8 59.7 51.1 40.0 26.6 48.7
Year Lowest Occurred 1981 1979 1967 1967 1967 1965 1962 1964 1963 1976 1976 1989 1965
Mean Min. Temperature (F) 24.5 25.1 31.7 39.1 48.2 57.0 63.6 63.7 57.7 48.8 40.5 30.0 44.2
Highest Mean Min. Temperature (F) 31.5 32.4 36.8 43.4 52.0 62.3 66.8 67.0 62.3 53.8 46.5 37.1 45.9
Year Highest Occurred 1990 1984 1973 1976 1979 1976 1980 1990 1961 1971 1979 1984 1990
Lowest Mean Min. Temperature (F) 17.1 16.8 28.0 36.2 43.2 53.9 60.5 59.9 53.3 44.6 35.2 19.6 42.5
Year Lowest Occurred 1977 1979 1978 1972 1967 1965 1962 1964 1990 1974 1976 1989 1965
Mean Precipitation (in.) 3.36 3.24 3.67 3.76 3.54 3.01 2.69 3.23 3.13 3.05 4.12 3.95 40.75
Highest Precipitation (in.) 8.83 6.88 8.05 9.21 7.95 8.66 7.09 8.98 11.51 7.33 9.11 8.12 59.59
Year Highest Occurred 1979 1971 1980 1983 1978 1982 1989 1976 1961 1977 1988 1967 1962
Lowest Precipitation (in.) 0.25 0.79 1.07 0.83 1.41 0.56 0.67 0.16 0.33 0.84 0.89 0.93 24.08
Year Lowest Occurred 1985 1987 1979 1985 1964 1988 1983 1984 1971 1985 1984 1985 1965
Heating Degree Days (F) 1060. 952. 846. 582. 316. 78. 0. 6. 81. 322. 567. 896. 5706.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 36. 157. 164. 42. 0. 0. 0. 399.

Western Regional Climate Center, wrcc@dri.edu