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Superior September Weather

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

Typical Superior September Weather 1991–2020
Average daily high	66.6 °F
Average daily low	50.2 °F
Average monthly precipitation	3.4 inches
Average monthly snow	none
Daily chance of precipitation	32.9%
Daily chance of snow	0%

Superior September Weather Records 1909–2024
Highest temperature	97 °F	September 8, 1976
Lowest temperature	19 °F	September 13, 1963
Highest daily low	74 °F	September 21, 1941
Lowest daily high	41 °F	September 23, 1974
Hottest average high temperature	76.5 °F	1948
Coldest average high temperature	58.7 °F	1926
Most daily precipitation	4.1 inches	September 22, 1924
Most monthly precipitation	8.5 inches	1991
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	71.6	55.0	92	32
September 2	71.5	54.8	94	37
September 3	71.3	54.6	94	33
September 4	70.9	54.3	91	30
September 5	70.7	54.0	94	33
September 6	70.3	53.8	93	35
September 7	70.1	53.4	91	32
September 8	69.7	53.1	97	28
September 9	69.2	52.7	89	29
September 10	68.8	52.3	89	30
September 11	68.4	51.9	90	28
September 12	68.0	51.6	93	28
September 13	67.7	51.2	87	19
September 14	67.3	50.8	81	29
September 15	66.8	50.4	86	30
September 16	66.5	50.1	93	32
September 17	66.0	49.7	90	25
September 18	65.6	49.3	88	29
September 19	65.2	48.9	90	28
September 20	64.7	48.4	85	25
September 21	64.1	48.0	87	26
September 22	63.6	47.6	83	25
September 23	63.2	47.2	87	28
September 24	63.0	46.9	85	24
September 25	62.6	46.5	84	23
September 26	62.1	46.1	90	23
September 27	61.7	45.7	84	22
September 28	61.3	45.2	82	23
September 29	60.9	44.8	81	25
September 30	60.4	44.4	83	22

Weather Station Details

Years	Station	Coordinates
1909–2024	Superior	location