Breakdown by Decade

Detroit Area Average Monthly Temperatures from 1880 to 1900
Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Avg for Year
1880	36.7	32.1	32.8	46.2	63.7	68.4	70.8	69.1	61.8	48.6	29.8	21.8	48.5
1881	17.2	26.3	34.4	44.8	64.3	64.4	74.6	74.2	72.2	57.0	43.5	40.6	51.1
1882	31.0	39.5	39.7	45.9	52.7	66.6	70.3	71.4	64.0	57.6	42.0	30.5	50.9
1883	21.6	24.9	29.8	46.0	54.3	67.6	70.8	67.1	59.2	51.3	44.3	33.2	47.5
1884	20.5	30.7	35.0	46.2	58.9	70.4	69.9	69.2	67.9	56.2	39.5	30.3	49.6
1885	22.6	17.2	26.3	45.4	57.1	66.1	74.5	66.9	62.8	50.9	42.4	33.1	47.1
1886	24.1	27.6	36.0	51.1	59.0	67.2	71.6	70.8	65.3	55.5	38.7	23.9	49.2
1887	23.0	28.2	30.5	45.8	63.0	67.9	75.9	68.6	60.1	48.0	38.3	29.4	48.2
1888	18.0	24.2	28.6	43.2	54.3	67.8	71.0	68.9	60.1	46.9	41.4	31.4	46.3
1889	29.8	19.4	37.5	46.3	57.3	63.8	71.3	69.9	62.7	46.9	40.2	39.2	48.7
1890	33.6	32.4	30.4	46.5	54.6	71.7	72.2	67.1	59.8	51.6	41.3	27.3	49.0
1891	28.8	30.6	30.8	48.3	55.7	68.3	67.2	69.6	67.8	50.8	36.5	35.7	49.2
1892	20.7	29.1	30.8	44.8	55.6	69.6	72.1	70.9	63.4	51.5	35.7	26.6	47.6
1893	15.4	22.0	32.8	44.2	55.1	69.8	72.8	70.0	61.6	52.6	38.4	27.7	46.9
1894	29.9	23.6	40.4	47.6	56.3	70.7	73.9	69.4	66.3	51.8	35.0	32.4	49.8
1895	20.0	17.9	28.5	48.7	59.6	71.2	70.4	71.2	66.7	45.4	37.9	29.7	47.3
1896	25.4	25.0	28.8	51.2	65.3	67.9	71.4	70.3	59.6	47.7	40.5	30.3	48.6
1897	23.0	27.5	34.7	45.2	54.8	64.6	74.8	67.8	66.3	56.0	38.8	27.5	48.4
1898	28.2	26.4	40.3	45.4	58.8	69.6	73.1	72.0	67.5	53.0	37.5	26.9	49.9
1899	24.0	19.8	29.3	50.5	59.8	68.7	71.5	72.2	59.8	56.0	42.8	28.7	48.6
1900	28.3	21.3	26.3	48.3	60.0	66.6	72.0	75.5	66.9	60.1	38.7	29.3	49.4