Monthly Temperature Data
Grand Rapids, Michigan
(October 1948 through June 1957)

[Note: There were two stations for Grand Rapids during this time period. The following data are based on the airport records.]

Month/Year

Actual temperature

Normal temperature

Deviation from normal

Oct. 1948 48.4 48.4 0
Nov. 1949 42.7 35.8 6.9
Dec. 1948 29.1 26.6 2.5
Jan. 1949 28.4 22.2 6.2
Feb. 1949 27.4 20.9 6.5
Mar. 1949 33.7 30.7 3
April 1949 46.1 44.5 1.6
May 1949 59.1 55.7 3.4
June 1949 71.6 65.4 6.2
July 1949 75 69.9 5.1
Aug. 1949 71.1 68 3.1
Sept. 1949 58 60 -2
Oct. 1949 55.1 48.4 6.7
Nov. 1949 36.9 35.8 1.1
Dec. 1949 31.5 26.6 4.9
Jan. 1950 29.2 22.2 7
Feb. 1950 23.9 20.9 3
Mar. 1950 28.9 30.7 -1.8
April 1950 39.6 44.5 -4.9
May 1950 58 55.7 2.3
June 1950 65.7 65.4 0.3
July 1950 68.1 69.9 -1.8
Aug. 1950 66.9 68 -1.1
Sept. 1950 60.5 60 0.5
Oct. 1950 54.6 48.4 6.2
Nov. 1950 34.4 35.8 -1.4
Dec. 1950 23.6 26.6 -3
Jan. 1951 24.4 22.2 2.2
Feb. 1951 26.7 20.9 5.8
Mar. 1951 33.9 30.7 3.2
April 1951 44.6 44.5 0.1
May 1951 59.6 55.7 3.9
June 1951 65 65.4 -0.4
July 1951 70 69.9 0.1
Aug. 1951 66.7 68 -1.3
Sept. 1951 59.5 60 -0.5
Oct. 1951 52.5 48.4 4.1
Nov. 1951 31 35.8 -4.8
Dec. 1951 26.2 26.6 -0.4
Jan. 1952 26.3 22.2 4.1
Feb. 1952 28.3 20.9 7.4
Mar. 1952 32.7 30.7 2
April 1952 47.6 44.5 3.1
May 1952 56.2 55.7 0.5
June 1952 70.2 65.4 4.8
July 1952 73.2 69.9 3.3
Aug. 1952 69.3 68 1.3
Sept. 1952 62.7 60 2.7
Oct. 1952 44.7 48.4 -3.7
Nov. 1952 39.8 35.8 4
Dec. 1952 31.3 26.6 4.7
Jan. 1953 27.4 23.5 3.9
Feb. 1953 29.7 23.8 5.9
Mar. 1953 36.1 32.5 3.6
April 1953 42.8 44.8 -2
May 1953 58.7 56.3 2.4
June 1953 70 66.7 3.3
July 1953 72.6 71.5 1.1
Aug. 1953 71.2 69.7 1.5
Sept. 1953 62.1 61.9 0.2
Oct. 1953 54.5 50.3 4.2
Nov. 1953 42.3 37.6 4.7
Dec. 1953 32.1 27.3 4.8
Jan. 1954 23.5 23.5 0
Feb. 1954 32.6 23.8 8.8
Mar. 1954 31 32.5 -1.5
April 1954 49 44.8 4.2
May 1954 53.6 56.3 -2.7
June 1954 70 66.7 3.3
July 1954 70 71.5 -1.5
Aug. 1954 68.4 69.7 -1.3
Sept. 1954 63.3 61.9 1.4
Oct. 1954 51.8 50.3 1.5
Nov. 1954 39.9 37.6 2.3
Dec. 1954 28.3 27.3 1
Jan. 1955 24.2 23.5 0.7
Feb. 1955 25.2 23.8 1.4
Mar. 1955 33.1 32.5 0.6
April 1955 52.8 44.8 8
May 1955 59.6 56.3 3.3
June 1955 66.4 66.7 -0.3
July 1955 76.9 71.5 5.4
Aug. 1955 75.1 69.7 5.4
Sept. 1955 62.2 61.9 0.3
Oct. 1955 53.9 50.3 3.6
Nov. 1955 35.3 37.6 -2.3
Dec. 1955 25.5 27.3 -1.8
Jan. 1956 24.3 23.5 0.8
Feb. 1956 24.5 23.8 0.7
Mar. 1956 30.1 32.5 -2.4
April 1956 44 44.8 -0.8
May 1956 55.6 56.3 -0.7
June 1956 69.5 66.7 2.8
July 1956 69.2 71.5 -2.3
Aug. 1956 69.3 69.7 -0.4
Sept. 1956 59.6 61.9 -2.3
Oct. 1956 55.8 50.3 5.5
Nov. 1956 39.5 37.6 1.9
Dec. 1956 31.9 27.3 4.6
Jan. 1957 19.7 23.5 -3.8
Feb. 1957 28.2 23.8 4.4
Mar. 1957 34.7 32.5 2.2
April 1957 47.1 44.8 2.3
May 1957 55.9 56.3 -0.4
June 1957 67.5 66.7 0.8