Monthly Temperature Data
Grand Rapids, Michigan
(July 1957 through June 1967)

Month/Year

Actual temperature

Normal temperature

Deviation from normal

July 1957 72.2 71.5 0.7
Aug. 1957 68.8 69.7 -0.9
Sept. 1957 59.6 61.9 -2.3
Oct. 1957 48.3 50.3 -2
Nov. 1957 38.3 37.6 0.7
Dec. 1957 31.3 27.3 4
Jan. 1958 23.2 23.5 -0.3
Feb. 1958 20.3 23.8 -3.5
Mar. 1958 34.8 32.5 2.3
April 1958 47.5 44.8 2.7
May 1958 57.1 56.3 0.8
June 1958 62 66.7 -4.7
July 1958 69.3 71.5 -2.2
Aug. 1958 70.1 69.7 0.4
Sept. 1958 61.6 61.9 -0.3
Oct. 1958 52.7 50.3 2.4
Nov. 1958 40.6 37.6 3.2
Dec. 1958 20.5 27.3 -6.8
Jan. 1959 17.7 23.5 -5.8
Feb. 1959 22.3 23.8 -1.5
Mar. 1959 31.5 32.5 -1
April 1959 45.5 44.8 0.7
May 1959 62.8 56.3 6.5
June 1959 69.7 66.7 3
July 1959 71.7 71.5 0.2
Aug. 1959 75.5 69.7 5.8
Sept. 1959 65.4 61.9 3.5
Oct. 1959 48.9 50.3 -1.4
Nov. 1959 33.5 37.6 -4.1
Dec. 1959 32.9 27.3 5.6
Jan. 1960 26.8 23.5 3.3
Feb. 1960 24.8 23.8 1
Mar. 1960 23.9 32.5 -8.6
April 1960 48.9 44.8 4.1
May 1960 56.7 56.3 0.4
June 1960 64.8 66.7 -1.9
July 1960 69.2 71.5 -2.3
Aug. 1960 70.6 69.7 0.9
Sept. 1960 65.6 61.9 3.7
Oct. 1960 51.5 50.3 1.2
Nov. 1960 41.8 37.6 4.2
Dec. 1960 23.8 27.3 -3.5
Jan. 1961 20.9 23.5 -2.6
Feb. 1961 29.2 23.8 5.4
Mar. 1961 37.7 32.5 5.2
April 1961 42.3 44.8 -2.5
May 1961 54.3 56.3 -2
June 1961 65.9 66.7 -0.8
July 1961 71.4 71.5 -0.1
Aug. 1961 70 69.7 0.3
Sept. 1961 67 61.9 5.1
Oct. 1961 52.9 50.3 2.6
Nov. 1961 40.1 37.6 2.5
Dec. 1961 27.4 27.3 ..1
Jan. 1962 19.3 24.4 -5.1
Feb. 1962 21.6 24.4 -2.9
Mar. 1962 32.6 32.4 0.2
April 1962 45.9 45.7 0.2
May 1962 63 57 6
June 1962 68.2 67.4 0.8
July 1962 69.3 71.9 -2.6
Aug. 1962 70.7 70.5 0.2
Sept. 1962 60.4 62.2 -1.8
Oct. 1962 53.3 51.2 2.1
Nov. 1962 39.4 38.2 1.2
Dec. 1962 24.5 28 -3.5
Jan. 1963 15.9 24.4 -8.5
Feb. 1963 16.9 24.5 -7.6
Mar. 1963 35.4 32.4 3
April 1963 47.6 45.7 1.9
May 1963 55.4 57 -1.6
June 1963 69.1 67.4 1.7
July 1963 72.1 71.9 0.2
Aug. 1963 67.2 70.5 -3.3
Sept. 1963 61.2 62.2 -1
Oct. 1963 58.8 51.2 7.6
Nov. 1963 44.2 38.2 6
Dec. 1963 21.3 28 -6.7
Jan. 1964 27.5 24 2.5
Feb. 1964 25 24.3 0.7
Mar. 1964 34.5 32.7 1.8
April 1964 48.2 45.7 2.5
May 1964 62 56.8 5.2
June 1964 68.9 67.5 1.4
July 1964 73.1 72.3 0.8
Aug. 1964 67.3 70.4 -3.1
Sept. 1964 61.4 62.2 -0.8
Oct. 1964 47.2 51.1 -3.9
Nov. 1964 41.8 37.3 4.5
Dec. 1964 26 27 -1
Jan. 1965 22.5 24 -1.5
Feb. 1965 23.8 24.3 -0.5
Mar. 1965 26.2 32.7 -6.5
April 1965 42.8 45.7 -2.9
May 1965 62.3 56.8 5.5
June 1965 65.9 67.5 -1.6
July 1965 70 72.3 -2.3
Aug. 1965 67.9 70.4 -2.5
Sept. 1965 62.3 62.2 0.1
Oct. 1965 50 51.1 -1.1
Nov. 1965 40 37.3 2.7
Dec. 1965 33.5 27 6.5
Jan. 1966 19.1 24 -4.9
Feb. 1966 25.5 24.3 1.2
Mar. 1966 37.1 32.7 4.4
April 1966 43.8 45.7 -1.9
May 1966 52 56.8 -4.8
June 1966 69.2 67.5 1.7
July 1966 73.6 72.3 1.3
Aug. 1966 68.5 70.4 -1.9
Sept. 1966 61.4 62.2 -0.8
Oct. 1966 51.2 51.1 0.1
Nov. 1966 42.1 37.3 4.8
Dec. 1966 29.2 27 2.2
Jan. 1967 28.6 24 4.6
Feb. 1967 20.4 24.3 -3.9
Mar. 1967 34.1 32.7 1.4
April 1967 46.4 45.7 0.7
May 1967 51.9 56.8 -4.9
June 1967 69.3 67.5 1.8