highest team slg in history of any month with more than 20 games

The New York Yankees have the best slugging percentage by a team with >20 games played in a month, with a slugging percentage of .593 in June 1930.

	TEAM	SLG	G	MONTH	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	OPS
1	Yankees	.593	28	June 1930	.714	20	8	1,043	261	382	64	26	40	245	137	5	99	22		1,219	618	130	34				.366	.442	1.035
2	Braves	.569	25	June 2023	.840	21	4	880	175	269	41	4	61	168	92	5	176	27	4	987	501	106	0	10	3	22	.306	.371	.940
3	Astros	.568	24	July 2017	.625	15	9	870	174	281	71	5	44	169	78	11	167	23	8	974	494	120	1	14	5	19	.323	.380	.948
4	Cardinals	.568	25	April 2000	.680	17	8	858	180	258	48	8	55	176	123	13	204	19	9	1,017	487	111	11	12	6	11	.301	.392	.959
5	Red Sox	.556	26	June 2003	.615	16	10	974	190	307	79	15	42	185	119	4	148	11	4	1,114	542	136	6	11	15	25	.315	.388	.945
6	Braves	.554	24	July 2006	.583	14	10	861	171	268	53	3	50	164	74	9	175	4	5	962	477	106	12	6	7	23	.311	.369	.923
7	Yankees	.551	30	August 2019	.700	21	9	1,050	178	292	59	3	74	172	86	10	244	9	2	1,149	579	136	0	3	3	21	.278	.338	.889
8	Mariners	.549	27	May 1999	.556	15	12	961	191	296	48	5	58	186	122	4	155	16	9	1,098	528	111	4	7	8	22	.308	.386	.935
9	Phillies	.548	27	August 2023	.630	17	10	932	176	267	59	4	59	173	90	20	215	17	4	1,053	511	122	2	9	3	22	.286	.359	.907
10	Indians	.546	33	July 1936	.656	21	11	1,254	244	442	97	22	34	229	82	4	81	14		1,361	685	153	21				.352	.394	.940
11	Rangers	.544	25	September 2011	.760	19	6	894	166	286	43	5	49	157	78	4	134	25	6	990	486	97	3	11	5	23	.320	.373	.916
12	Indians	.543	25	April 1997	.480	12	13	898	167	274	57	5	49	159	138	5	140	20	7	1,050	488	111	5	4	12	32	.305	.399	.942
13	Astros	.542	28	August 2019	.679	19	9	987	200	293	69	7	53	191	126	10	195	4	4	1,135	535	129	2	10	7	24	.297	.379	.921
14	Giants	.539	26	June 2000	.500	13	13	935	175	289	65	9	44	168	128	9	175	19	4	1,097	504	118	12	13	16	22	.309	.393	.932
15	Rockies	.537	24	April 2001	.542	13	11	841	161	260	53	8	41	154	80	8	158	15	7	956	452	102	16	11	10	11	.309	.370	.908
16	Rangers	.535	26	September 1999	.615	16	10	902	162	284	54	8	43	150	86	5	137	15	9	1,012	483	105	13	6	5	25	.315	.375	.911
17	Braves	.535	28	May 2003	.714	20	8	990	183	287	60	9	55	174	99	8	160	14	3	1,123	530	124	13	13	6	15	.290	.355	.890
18	Red Sox	.534	25	July 2019	.600	15	10	921	173	278	69	5	45	168	80	4	209	8	2	1,015	492	119	2	8	6	11	.302	.357	.892
19	Orioles	.534	29	August 2017	.586	17	12	1,039	175	318	56	5	57	169	60	10	226	9	4	1,118	555	118	1	8	3	25	.306	.347	.882
20	Astros	.534	28	September 2000	.571	16	12	987	195	307	60	11	46	190	111	12	190	22	10	1,131	527	117	7	14	11	26	.311	.383	.917
21	Yankees	.534	28	May 1936	.714	20	8	1,032	218	319	73	21	39	205	137	9	104	15		1,188	551	133	10				.309	.395	.929
22	Rockies	.533	29	June 1996	.517	15	14	1,040	209	328	65	4	51	199	111	12	210	35	11	1,182	554	120	12	7	9	24	.315	.385	.918
23	Rockies	.531	26	June 1999	.500	13	13	937	175	289	45	10	48	170	67	6	124	10	8	1,028	498	103	12	6	5	17	.308	.356	.888
24	Rays	.531	28	April 2023	.786	22	6	973	191	276	56	4	59	184	91	19	241	25	9	1,092	517	119	0	9	1	10	.284	.353	.885
25	Orioles	.531	28	June 2016	.679	19	9	979	185	294	58	0	56	177	82	9	231	4	2	1,081	520	114	2	9	4	20	.300	.357	.888