[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 |