The Cincinnati Reds had their most wins in a season in the month of September in 1940 and in 1939, with 23 wins.

Interpreted as:

reds all-time wins in a regular season record in september

	TEAM	W	SEASON	L	W%	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Reds	23	1940	8	.742	32	1,140	151	315	53	10	11	140	92	6	108	25		1,266	421	74	28			26	.276	.334	.369	.703
2	Reds	23	1939	11	.676	35	1,180	164	347	65	16	20	156	124	7	112	11		1,363	504	101	52			32	.294	.365	.427	.792
3	Reds	22	1944	13	.629	35	1,202	126	309	47	3	12	118	92	6	93	17		1,324	398	62	24			38	.257	.313	.331	.644
4	Reds	20	1981	8	.714	28	960	125	260	46	4	18	117	104	6	153	9	9	1,087	368	68	8	9	13	25	.271	.343	.383	.726
5	Reds	19	1999	9	.679	28	984	175	274	49	4	51	165	111	11	212	26	10	1,121	484	104	12	3	5	15	.278	.357	.492	.849
6	Reds	19	1985	9	.679	29	981	142	267	46	8	25	137	103	5	152	25	6	1,115	404	79	16	10	21	23	.272	.341	.412	.753
7	Reds	19	1978	8	.704	27	876	121	220	38	4	21	115	110	3	143	28	16	1,011	329	63	14	8	13	18	.251	.334	.376	.710
8	Reds	19	1973	8	.704	27	961	141	251	52	5	29	133	105	4	155	24	7	1,094	400	86	18	6	11	16	.261	.335	.416	.751
9	Reds	19	1941	12	.613	31	1,051	126	252	45	9	11	115	105	6	92	17		1,184	348	65	22			21	.240	.312	.331	.644
10	Reds	19	1927	11	.633	30	1,002	134	277	46	22	3	116	66	3	50	12		1,114	376	71	43				.276	.323	.375	.698
11	Reds	18	2009	9	.667	27	897	138	240	59	5	27	134	97	7	201	14	6	1,026	390	91	19	6	4	25	.268	.342	.435	.776
12	Reds	18	2000	10	.643	28	947	170	280	50	8	47	165	103	13	174	28	9	1,091	487	105	10	18	6	22	.296	.366	.514	.881
13	Reds	18	1992	10	.643	28	935	112	257	45	11	13	104	77	5	150	17	12	1,034	363	69	7	10	7	21	.275	.330	.388	.718
14	Reds	18	1988	9	.667	27	898	114	234	32	4	18	104	68	1	160	27	11	992	328	54	18	7	8	11	.261	.311	.365	.676
15	Reds	18	1975	9	.667	27	912	140	238	41	4	16	128	115	9	136	38	3	1,052	335	61	12	4	13	18	.261	.348	.367	.715
16	Reds	18	1964	11	.621	29	1,000	98	253	37	3	19	88	67	5	157	22	9	1,099	353	59	21	6	12	13	.253	.301	.353	.654
17	Reds	17	1997	11	.607	28	936	121	235	48	3	25	116	106	8	193	17	8	1,075	364	76	19	6	9	16	.251	.330	.389	.719
18	Reds	17	1987	9	.654	26	906	120	247	43	5	35	115	85	4	147	17	9	1,012	405	83	11	6	8	18	.273	.336	.447	.783
19	Reds	17	1974	10	.630	28	908	140	238	46	9	29	125	123	8	153	26	4	1,058	389	84	13	6	11	27	.262	.353	.428	.782
20	Reds	17	1923	12	.586	29	1,019	127	290	39	19	3	113	69	4	67	21		1,121	376	61	29				.285	.332	.369	.701
21	Reds	17	1912	11	.607	30	976	147	258	43	19	4	130	108	6	100	53		1,125	351	66	35				.264	.341	.360	.701
22	Reds	16	2020	9	.640	25	763	103	157	32	1	36	100	105	13	242	13	3	885	299	69	0	4	2	15	.206	.311	.392	.703
23	Reds	16	1986	11	.593	27	925	150	259	43	8	26	137	91	3	151	29	8	1,041	396	77	13	9	8	23	.280	.343	.428	.771
24	Reds	16	1976	10	.615	26	889	112	244	43	10	11	103	97	1	122	35	17	1,012	340	64	13	12	8	18	.274	.342	.382	.725
25	Reds	16	1969	15	.516	31	1,041	104	262	34	6	13	97	74	9	227	14	11	1,147	347	53	20	3	7	19	.252	.306	.333	.639