best team batting average in a month with at least 20 games played

The New York Yankees have the best batting average by a team with 20+ games played in a month, with an average of .366 in June 1930.

	TEAM	AVG	G	MONTH	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Yankees	.366	28	June 1930	.714	20	8	1,043	261	382	64	26	40	245	137	5	99	22		1,219	618	130	34				.442	.593	1.035
2	Indians	.362	31	July 1925	.581	18	13	1,143	228	414	70	18	11	195	109	6	66	28		1,293	553	99	35				.421	.484	.904
3	Indians	.352	33	July 1936	.656	21	11	1,254	244	442	97	22	34	229	82	4	81	14		1,361	685	153	21				.394	.546	.940
4	Phillies	.347	28	June 1930	.429	12	16	1,039	181	361	81	11	15	171	77	5	71	9		1,138	509	107	17				.395	.490	.885
5	Pirates	.346	32	August 1928	.719	23	9	1,163	247	402	58	36	14	228	103	11	65	18		1,323	574	108	46				.404	.494	.898
6	Cardinals	.344	31	July 1924	.548	17	14	1,081	194	372	59	23	16	175	85	11	61	21		1,215	525	98	38				.398	.486	.883
7	Pirates	.342	29	August 1922	.690	20	9	1,041	192	356	47	23	17	180	66	6	68	21		1,146	500	87	33				.385	.480	.865
8	Giants	.338	26	June 1912	.846	22	4	884	217	299	59	21	13	186	99	12	84	68		1,028	439	93	33				.412	.497	.909
9	Tigers	.335	26	June 1922	.577	15	11	889	155	298	46	17	10	141	106	7	47	11		1,050	408	73	48				.410	.459	.869
10	Athletics	.335	26	May 1911	.654	17	9	925	181	310	54	16	9		79	6		52		1,053	423	79	43				.391	.457	.848
11	Athletics	.335	27	July 1925	.667	18	9	985	168	330	67	20	15	150	75	3	67	8		1,115	482	102	52				.384	.489	.873
12	Senators	.335	28	June 1933	.741	20	7	1,087	218	364	76	16	18	204	99	4	67	17		1,216	526	110	26				.392	.484	.876
13	Pirates	.334	25	May 1925	.640	16	9	903	183	302	68	27	15	165	86	7	77	25		1,025	469	110	29				.397	.519	.916
14	Indians	.334	23	August 1923	.565	13	10	850	159	284	58	12	10	145	94	5	56	10		983	396	80	34				.404	.466	.869
15	Giants	.334	33	July 1930	.636	21	12	1,184	223	395	56	10	30	199	87	6	78	13		1,316	561	96	39				.382	.474	.856
16	Browns	.333	25	September 1922	.680	17	8	875	155	291	49	14	15	146	65	10	72	21		971	413	78	21				.385	.472	.857
17	Royals	.332	27	July 1980	.667	18	9	957	160	318	54	15	18	150	90	4	108	24	11	1,068	456	87	7	10	9	33	.388	.476	.865
18	Tigers	.332	28	September 1924	.667	18	9	982	182	326	56	18	7	165	94	8	59	30		1,128	439	81	44				.395	.447	.842
19	Pirates	.332	26	June 1925	.692	18	8	949	195	315	72	19	20	168	88	5	49	28		1,064	485	111	22				.392	.511	.903
20	Tigers	.332	33	May 1921	.545	18	15	1,160	220	385	67	27	13	207	139	5	66	21		1,359	545	107	55				.406	.470	.876
21	Athletics	.332	33	July 1928	.758	25	8	1,125	203	373	89	7	31	197	129	7	67	7		1,308	569	127	47				.404	.506	.909
22	Phillies	.331	25	May 1925	.480	12	13	899	162	298	63	9	28	146	87	5	87	11		1,014	463	100	23				.394	.515	.909
23	Cardinals	.331	25	September 1930	.840	21	4	901	183	298	69	18	16	176	65	5	89	12		999	451	103	28				.379	.501	.880
24	Cubs	.330	33	July 1929	.750	24	8	1,171	239	387	78	13	35	226	114	4	106	15		1,322	596	126	33				.392	.509	.901
25	Phillies	.330	26	May 1929	.577	15	11	918	180	303	47	2	35	169	119	5	92	16		1,073	459	84	31				.410	.500	.910