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Brainerd September Weather

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

Typical Brainerd September Weather 1991–2020
Average daily high	69.9 °F
Average daily low	46.2 °F
Average monthly precipitation	3.0 inches
Average monthly snow	none
Daily chance of precipitation	34.6%
Daily chance of snow	0%

Brainerd September Weather Records 1898–2024
Highest temperature	103 °F	September 10, 1931
Lowest temperature	18 °F	September 22, 1974
Highest daily low	76 °F	September 6, 1912
Lowest daily high	36 °F	September 29, 1899
Hottest average high temperature	76.5 °F	1998
Coldest average high temperature	59.2 °F	1926
Most daily precipitation	3.5 inches	September 30, 2019
Most monthly precipitation	8.1 inches	2019
Most daily snow	1.0 inches	September 26, 1942
Most monthly snow	2.0 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	75.3	51.7	95	28
September 2	75.0	51.4	93	30
September 3	74.9	51.1	96	26
September 4	74.7	50.8	102	28
September 5	74.4	50.5	96	34
September 6	74.0	50.3	96	34
September 7	73.6	50.0	91	35
September 8	73.1	49.5	96	31
September 9	72.6	49.0	95	33
September 10	72.2	48.6	103	24
September 11	71.7	48.2	95	30
September 12	71.2	47.7	90	30
September 13	70.9	47.3	90	28
September 14	70.5	46.9	95	30
September 15	70.1	46.4	89	27
September 16	69.7	46.0	91	27
September 17	69.4	45.5	88	24
September 18	68.9	45.0	85	21
September 19	68.5	44.5	89	28
September 20	68.0	44.0	91	23
September 21	67.4	43.5	83	20
September 22	66.8	43.1	94	18
September 23	66.3	42.7	87	23
September 24	65.9	42.3	85	23
September 25	65.5	41.9	85	23
September 26	65.2	41.4	83	22
September 27	65.0	41.1	84	24
September 28	64.6	40.7	89	19
September 29	64.2	40.4	83	21
September 30	63.7	40.0	84	21

Weather Station Details

Years	Station	Coordinates
1955–2024	Brainerd	location
1898–1955	Brainerd	location