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Portage September Weather

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

Typical Portage September Weather 1991–2020
Average daily high	72.9 °F
Average daily low	51.0 °F
Average monthly precipitation	3.6 inches
Average monthly snow	none
Daily chance of precipitation	34.1%
Daily chance of snow	0%

Portage September Weather Records 1889–2024
Highest temperature	103 °F	September 6, 1922
Lowest temperature	17 °F	September 22, 1974
Highest daily low	84 °F	September 10, 1931
Lowest daily high	40 °F	September 28, 1899
Hottest average high temperature	81.5 °F	1931
Coldest average high temperature	65.0 °F	1993
Most daily precipitation	4.0 inches	September 13, 1961
Most monthly precipitation	14.4 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	77.6	56.3	98	33
September 2	77.4	56.0	98	32
September 3	77.2	55.7	95	35
September 4	77.1	55.5	96	31
September 5	76.8	55.2	98	34
September 6	76.5	54.9	103	34
September 7	76.3	54.6	98	34
September 8	75.9	54.2	95	37
September 9	75.5	53.8	97	37
September 10	75.1	53.3	97	29
September 11	74.7	52.9	95	30
September 12	74.4	52.5	95	33
September 13	74.1	52.1	93	33
September 14	73.6	51.7	95	31
September 15	73.2	51.2	96	31
September 16	72.8	50.8	93	30
September 17	72.3	50.4	91	34
September 18	71.9	49.9	91	31
September 19	71.4	49.5	90	31
September 20	71.1	49.2	90	29
September 21	70.5	48.7	91	29
September 22	70.0	48.2	91	17
September 23	69.6	47.9	91	21
September 24	69.3	47.6	91	21
September 25	69.0	47.2	90	28
September 26	68.7	46.8	90	23
September 27	68.3	46.4	84	28
September 28	68.0	46.0	90	27
September 29	67.6	45.6	90	24
September 30	67.2	45.2	88	23

Weather Station Details

Years	Station	Coordinates
1889–2024	Portage WWTP	location