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St. Peter September Weather

Averages and records for weather in St. Peter, Minnesota in the month of September.

Typical St. Peter September Weather 1991–2020
Average daily high	73.1 °F
Average daily low	50.8 °F
Average monthly precipitation	2.9 inches
Average monthly snow	none
Daily chance of precipitation	23.6%
Daily chance of snow	0%

St. Peter September Weather Records 1893–2024
Highest temperature	103 °F	September 10, 1931
Lowest temperature	21 °F	September 30, 1939
Highest daily low	76 °F	September 10, 1931
Lowest daily high	40 °F	September 26, 1942
Hottest average high temperature	83.5 °F	1908
Coldest average high temperature	62.1 °F	1965
Most daily precipitation	4.6 inches	September 22, 2016
Most monthly precipitation	9.6 inches	1986
Most daily snow	1.0 inches	September 26, 1942
Most monthly snow	1.0 inches	1942

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	55.7	98	37
September 2	77.5	55.5	101	39
September 3	77.3	55.2	101	32
September 4	77.2	54.9	101	35
September 5	76.9	54.6	101	36
September 6	76.6	54.3	103	34
September 7	76.3	53.9	100	34
September 8	75.9	53.5	101	40
September 9	75.4	53.0	99	30
September 10	75.1	52.5	103	33
September 11	74.7	52.1	97	30
September 12	74.3	51.6	95	32
September 13	74.0	51.2	98	27
September 14	73.6	50.7	100	32
September 15	73.2	50.2	100	32
September 16	72.9	49.7	96	32
September 17	72.6	49.3	97	30
September 18	72.2	48.8	94	26
September 19	71.8	48.3	94	31
September 20	71.3	47.9	93	30
September 21	70.7	47.4	96	26
September 22	70.1	47.0	95	24
September 23	69.7	46.6	97	27
September 24	69.5	46.3	90	27
September 25	69.1	45.9	90	28
September 26	68.7	45.4	89	24
September 27	68.4	44.9	91	27
September 28	68.0	44.4	89	23
September 29	67.5	44.0	88	24
September 30	67.0	43.5	86	21

Weather Station Details

Years	Station	Coordinates
1893–2024	St Peter	location