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Lake Mills September Weather

Averages and records for weather in Lake Mills, Wisconsin in the month of September.

Typical Lake Mills September Weather 1991–2020
Average daily high	74.4 °F
Average daily low	52.5 °F
Average monthly precipitation	3.5 inches
Average monthly snow	none
Daily chance of precipitation	29.3%
Daily chance of snow	0%

Lake Mills September Weather Records 1893–2024
Highest temperature	100 °F	September 7, 1939
Lowest temperature	24 °F	September 30, 1899
Highest daily low	75 °F	September 7, 1939
Lowest daily high	41 °F	September 29, 1899
Hottest average high temperature	81.8 °F	1897
Coldest average high temperature	67.3 °F	1918
Most daily precipitation	5.1 inches	September 8, 1941
Most monthly precipitation	10.3 inches	1965
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	78.7	57.3	99	36
September 2	78.4	57.0	97	38
September 3	78.3	56.8	93	40
September 4	78.2	56.5	97	40
September 5	77.9	56.2	94	41
September 6	77.7	56.0	94	37
September 7	77.4	55.6	100	40
September 8	77.1	55.3	98	40
September 9	76.7	54.8	96	38
September 10	76.3	54.4	96	33
September 11	76.1	54.0	96	34
September 12	75.7	53.6	93	35
September 13	75.3	53.2	96	33
September 14	74.9	52.8	99	28
September 15	74.5	52.4	99	34
September 16	74.1	52.1	91	30
September 17	73.7	51.5	92	35
September 18	73.2	51.1	90	35
September 19	72.8	50.8	92	32
September 20	72.4	50.4	92	32
September 21	71.9	49.9	93	33
September 22	71.4	49.5	90	28
September 23	71.1	49.1	94	26
September 24	70.9	48.8	94	29
September 25	70.6	48.5	92	29
September 26	70.3	48.1	93	25
September 27	69.9	47.7	85	30
September 28	69.5	47.2	89	28
September 29	69.1	46.8	91	26
September 30	68.6	46.4	89	24

Weather Station Details

Years	Station	Coordinates
1893–2024	Lake Mills Wwtp	location