Monthly Temperature Data
Grand Rapids, Michigan
(July 1967 through June 1977)

Month/Year

Actual temperature

Normal temperature

Deviation from normal

July 1967 68.6 72.3 -3.7
Aug. 1967 66 70.4 -4.4
Sept. 1967 60.3 62.2 -1.9
Oct. 1967 49.9 51.1 -1.2
Nov. 1967 34.5 37.3 -2.8
Dec. 1967 29.9 27 2.9
Jan. 1968 21 24 -3
Feb. 1968 21.4 24.3 -2.9
Mar. 1968 38 32.7 5.3
April 1968 48.8 45.7 3.1
May 1968 54 56.8 -2.8
June 1968 66.7 67.5 -0.8
July 1968 69.8 72.3 -2.5
Aug. 1968 70.6 70.4 0.2
Sept. 1968 63.7 62.2 1.5
Oct. 1968 51.8 51.1 0.7
Nov. 1968 37.9 37.3 0.6
Dec. 1968 24.3 27 -2.7
Jan. 1969 20.8 24 -3.2
Feb. 1969 24.4 24.3 0.1
Mar. 1969 29.3 32.7 -3.4
April 1969 46.4 45.7 0.7
May 1969 55.7 56.8 -1.1
June 1969 61.8 67.5 -5.7
July 1969 71.3 72.3 -1
Aug. 1969 72.1 70.4 1.7
Sept. 1969 62.4 62.2 0.2
Oct. 1969 47.9 51.1 -3.2
Nov. 1969 33.5 37.3 -3.8
Dec. 1969 25 27 -2
Jan. 1970 17 24 -7
Feb. 1970 22.4 24.3 -1.9
Mar. 1970 28.8 32.7 -3.9
April 1970 46.8 45.7 1.1
May 1970 59.4 56.8 2.6
June 1970 66.8 67.5 -0.7
July 1970 72.1 72.3 -0.2
Aug. 1970 70.1 70.4 -0.3
Sept. 1970 61.7 62.2 -0.5
Oct. 1970 52.2 51.1 1.1
Nov. 1970 38.3 37.3 1
Dec. 1970 25.7 27 -1.3
Jan. 1971 18.3 24 -5.7
Feb. 1971 24.1 24.3 -0.2
Mar. 1971 29 32.7 -3.7
April 1971 43.9 45.7 -1.8
May 1971 54 56.8 -2.8
June 1971 70.9 67.5 3.4
July 1971 69.2 72.3 -3.1
Aug. 1971 68.6 70.4 -1.8
Sept. 1971 65.6 62.2 3.4
Oct. 1971 58.3 51.1 7.2
Nov. 1971 38 37.3 0.7
Dec. 1971 32 27 5
Jan. 1972 20.8 24 -3.2
Feb. 1972 21.9 24.3 -2.4
Mar. 1972 29.7 32.7 -3
April 1972 42.3 45.7 -3.4
May 1972 59.3 56.8 2.5
June 1972 63.5 67.5 -4
July 1972 70.3 72.3 -2
Aug. 1972 68.7 70.4 -1.7
Sept. 1972 62 62.2 -0.2
Oct. 1972 46.1 51.1 -5
Nov. 1972 35.9 37.3 -1.4
Dec. 1972 26.6 27 -0.4
Jan. 1973 27.4 24 3.4
Feb. 1973 22.8 24.3 -1.5
Mar. 1973 41.9 32.7 9.2
April 1973 46.8 45.7 1.1
May 1973 53.7 56.8 -3.1
June 1973 69.9 67.5 2.4
July 1973 72.4 72.3 0.1
Aug. 1973 72.7 70.4 2.3
Sept. 1973 63.4 62.2 1.2
Oct. 1973 55 51.1 3.9
Nov. 1973 39.9 37.3 2.6
Dec. 1973 26.2 27 -0.8
Jan. 1974 25.7 23.2 2.5
Feb. 1974 21.1 24.5 -3.4
Mar. 1974 33.6 33.1 0.5
April 1974 47.2 46.5 0.7
May 1974 53.2 57.1 -3.9
June 1974 63 67.4 -4.4
July 1974 71.1 71.5 -0.4
Aug. 1974 67.3 70 -2.7
Sept. 1974 56.4 62.4 -6
Oct. 1974 46.9 52 -5.1
Nov. 1974 37.6 38.7 -1.1
Dec. 1974 28.4 27.4 1
Jan. 1975 25.2 23.2 2
Feb. 1975 24.3 24.5 -0.2
Mar. 1975 28.8 33.1 -4.3
April 1975 39.8 46.5 -6.7
May 1975 60.7 57.1 3.6
June 1975 67.6 67.4 0.2
July 1975 70.6 71.5 -0.9
Aug. 1975 70.5 70 0.5
Sept. 1975 57 62.4 -5.4
Oct. 1975 53 52 1
Nov. 1975 44.7 38.7 6
Dec. 1975 27.3 27.4 -0.1
Jan. 1976 18.9 23.2 -4.3
Feb. 1976 31 24.5 6.5
Mar. 1976 37.9 33.1 4.8
April 1976 48.2 46.5 1.7
May 1976 53.9 57.1 -3.2
June 1976 69.5 67.4 2.1
July 1976 72.5 71.5 1
Aug. 1976 68.9 70 -1.1
Sept. 1976 60.2 62.4 -2.2
Oct. 1976 45.7 52 -6.3
Nov. 1976 31.5 38.7 -7.2
Dec. 1976 19.1 27.4 -8.3
Jan. 1977 12.7 23.2 -10.5
Feb. 1977 22.8 24.5 -1.7
Mar. 1977 40 33.1 6.9
April 1977 52.1 46.5 5.6
May 1977 65.8 57.1 8.7
June 1977 64.5 67.4 -2.9