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Ann Arbor September Weather

Averages and records for weather in Ann Arbor, Michigan in the month of September.

Typical Ann Arbor September Weather 1991–2020
Average daily high	75.2 °F
Average daily low	53.7 °F
Average monthly precipitation	3.2 inches
Average monthly snow	none
Daily chance of precipitation	35.3%
Daily chance of snow	0%

Ann Arbor September Weather Records 1891–2024
Highest temperature	99 °F	September 2, 1913
Lowest temperature	27 °F	September 30, 1899
Highest daily low	78 °F	September 2, 1953
Lowest daily high	43 °F	September 29, 1967
Hottest average high temperature	80.9 °F	1906
Coldest average high temperature	65.0 °F	1918
Most daily precipitation	3.9 inches	September 27, 1971
Most monthly precipitation	7.0 inches	1986
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	79.4	58.4	98	40
September 2	79.2	58.2	99	39
September 3	79.0	57.9	98	39
September 4	78.9	57.7	92	42
September 5	78.7	57.4	95	42
September 6	78.4	57.2	94	40
September 7	78.2	57.0	96	40
September 8	78.0	56.7	98	39
September 9	77.6	56.3	96	37
September 10	77.3	55.9	95	37
September 11	76.9	55.5	94	35
September 12	76.6	55.1	94	40
September 13	76.2	54.8	94	35
September 14	75.8	54.4	96	33
September 15	75.4	54.0	98	36
September 16	75.0	53.6	96	37
September 17	74.6	53.1	92	34
September 18	74.2	52.7	91	36
September 19	73.8	52.4	90	29
September 20	73.3	52.2	91	34
September 21	72.9	51.8	92	33
September 22	72.4	51.3	92	31
September 23	72.1	50.9	92	33
September 24	71.8	50.5	91	32
September 25	71.6	50.2	92	34
September 26	71.3	49.8	91	32
September 27	70.9	49.5	87	31
September 28	70.5	49.1	90	30
September 29	70.1	48.7	91	29
September 30	69.7	48.3	89	27

Weather Station Details

Years	Station	Coordinates
1891–2024	University of Michigan	location