Joe DiMaggio has the highest slugging percentage with 100+ at-bats in a month, with a slugging percentage of .983 in July 1937.

Interpreted as:

highest slg by a player in a month with 100 or more at bats

	NAME	SLG	AB	MONTH	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	OPS
1	Joe DiMaggio J. DiMaggio	.983	121	July 1937	29	40	52	10	6	15	43	17	1	9	2		139	119	31	0				.430	.504	1.487
2	Richard Hidalgo R. Hidalgo	.971	103	September 2000	28	36	49	14	2	11	31	11	4	9	5	0	120	100	27	0	2	2	0	.476	.533	1.504
3	Babe Ruth B. Ruth	.970	100	July 1920	34	45	44	10	2	13	33	43	1	19	5		147	97	25	3				.440	.611	1.581
4	Babe Ruth B. Ruth	.960	100	June 1920	29	38	45	7	4	12	37	30	1	17	6		131	96	23	0				.450	.580	1.540
5	Shohei Ohtani S. Ohtani	.952	104	June 2023	27	27	41	7	3	15	29	21	0	26	4	1	126	99	25	0	1	2	2	.394	.492	1.444
6	Albert Belle A. Belle	.941	101	July 1998	26	24	41	6	0	16	32	9	0	13	0	0	110	95	22	0	0	2	1	.406	.455	1.395
7	Sammy Sosa S. Sosa	.936	109	August 2001	29	31	42	3	3	17	36	16	3	24	0	1	130	102	23	0	2	3	0	.385	.469	1.405
8	Lou Gehrig L. Gehrig	.934	106	June 1936	26	35	48	11	2	12	31	19	0	4	1		125	99	25	0				.453	.536	1.470
9	Chick Hafey C. Hafey	.925	106	July 1928	27	30	49	18	2	9	34	8	1	10	3		116	98	29	1				.462	.504	1.429
10	Babe Ruth B. Ruth	.922	103	September 1927	27	29	39	3	1	17	43	19	0	15	3		126	95	21	4				.379	.475	1.398
11	Rudy York R. York	.920	113	August 1937	30	27	41	5	2	18	50	13	0	14	1		126	104	25	0				.363	.429	1.349
12	Lou Gehrig L. Gehrig	.919	111	June 1930	28	37	55	11	3	10	41	20	3	10	5		137	102	24	3				.495	.582	1.501
13	Juan Gonzalez J. Gonzalez	.917	108	July 1996	27	22	44	10	0	15	38	14	0	15	0	0	123	99	25	0	1	7	2	.407	.472	1.388
14	Norm Cash N. Cash	.901	101	June 1961	30	25	42	1	3	14	25	19	1	12	1	0	122	91	18	1	0	6	4	.416	.512	1.413
15	Giancarlo Stanton G. Stanton	.899	109	August 2017	29	28	38	6	0	18	37	14	3	31	1	0	127	98	24	0	1	4	2	.349	.433	1.332
16	Rogers Hornsby R. Hornsby	.896	106	August 1924	29	29	54	13	2	8	22	15	0	7	0		127	95	23	6				.509	.570	1.466
17	Chuck Klein C. Klein	.888	116	July 1929	28	24	52	7	1	14	40	13	0	11	1		129	103	22	0				.448	.504	1.392
18	Frank Robinson F. Robinson	.887	115	July 1961	30	31	47	12	2	13	34	12	2	11	6	0	131	102	27	0	2	3	1	.409	.466	1.353
19	Babe Ruth B. Ruth	.885	131	July 1924	37	43	59	9	3	14	40	31	0	16	2		164	116	26	2				.450	.556	1.441
20	Austin Riley A. Riley	.885	104	July 2022	26	21	44	15	0	11	25	7	0	20	0	0	111	92	26	0	0	0	1	.423	.459	1.344
21	Rogers Hornsby R. Hornsby	.880	100	June 1925	28	31	48	9	2	9	31	25	0	6	2		126	88	20	1				.480	.584	1.464
22	Mickey Mantle M. Mantle	.879	116	May 1956	31	35	48	6	0	16	35	23	0	15	4	0	140	102	22	0	1	2	0	.414	.507	1.386
23	Randy Winn R. Winn	.877	114	September 2005	28	25	51	12	2	11	17	7	0	15	2	4	124	100	25	3	0	1	0	.447	.479	1.357
24	Reggie Jackson R. Jackson	.875	104	June 1969	26	28	38	9	1	14	37	17	3	23	2	2	126	91	24	1	1	3	2	.365	.464	1.339
25	Joe Jackson J. Jackson	.873	102	June 1912	29	28	54	16	8	1		7	2		4		113	89	25	2				.529	.568	1.440