Counties with the most months in drought

Ranked by months in severe drought (Palmer index -3 or lower) since 1895. Carbon County, MT, leads with 347.

Counties with the most months in drought

1	Carbon County MT	347	223	−7.48
2	Elko County NV	334	154	−7.75
3	Apache County AZ	329	197	−8.24
4	Sheridan County WY	324	219	−8.29
5	Madison County ID	320	165	−8.87
6	Box Elder County UT	317	152	−8.45
7	Albany County WY	317	170	−9.24
8	Grant County NM	314	130	−6.01
9	Catron County NM	312	165	−7.43
10	Lyon County NV	312	123	−6.20
11	Kern County CA	311	134	−7.44
12	Storey County NV	311	140	−7.22
13	Bexar County TX	311	156	−6.60
14	Navajo County AZ	307	173	−7.51
15	Orange County CA	306	133	−7.12
16	Clark County ID	306	138	−9.06
17	Bingham County ID	304	165	−7.40
18	Comal County TX	303	160	−6.88
19	Greenlee County AZ	302	137	−6.58
20	Carbon County WY	301	173	−9.24
21	Sandoval County NM	301	152	−8.53
22	Eureka County NV	300	154	−8.05
23	Butte County ID	299	125	−7.68
24	Washoe County NV	299	121	−6.59
25	Sublette County WY	299	142	−6.61
26	Guadalupe County TX	299	139	−6.53
27	Crook County OR	298	167	−8.05
28	Big Horn County WY	297	159	−7.16
29	Coconino County AZ	297	166	−7.62
30	Jefferson County ID	296	147	−7.70
31	Frio County TX	295	115	−6.05
32	Medina County TX	294	145	−6.00
33	Broadwater County MT	292	144	−6.96
34	Montezuma County CO	288	175	−7.96
35	Hays County TX	288	142	−6.74
36	Pondera County MT	287	125	−6.79
37	San Miguel County CO	287	167	−9.00
38	Bernalillo County NM	286	125	−7.25
39	Dimmit County TX	283	94	−5.58
40	Gila County AZ	282	138	−6.80
41	Gooding County ID	282	141	−7.59
42	Goliad County TX	282	128	−6.06
43	Montrose County CO	281	181	−9.60
44	Morrow County OR	281	140	−7.05
45	Twin Falls County ID	280	131	−8.55
46	Brewster County TX	280	98	−6.91
47	Bee County TX	279	120	−6.03
48	Fremont County WY	276	170	−8.97
49	Los Angeles County CA	276	154	−7.94
50	Churchill County NV	276	113	−6.66
51	Atascosa County TX	275	98	−5.83
52	Lincoln County ID	275	156	−8.13
53	Kings County CA	274	80	−7.35
54	Merced County CA	273	111	−7.83
55	San Joaquin County CA	272	117	−7.56
56	Crane County TX	272	107	−6.05
57	Caldwell County TX	271	122	−6.51
58	Aransas County TX	268	121	−6.39
59	Hidalgo County NM	268	113	−6.33
60	Big Horn County MT	268	166	−7.16
61	San Diego County CA	268	131	−6.75
62	Silver Bow County MT	267	156	−7.16
63	Fremont County ID	267	103	−7.36
64	Stanislaus County CA	267	107	−7.39
65	Refugio County TX	266	125	−6.18
66	Kleberg County TX	266	91	−5.89
67	Midland County TX	265	110	−6.05
68	Carson City NV	263	110	−7.26
69	McKinley County NM	263	111	−7.22
70	Jerome County ID	262	121	−8.04
71	Moffat County CO	262	154	−9.68
72	Johnson County WY	261	134	−7.93
73	Ector County TX	261	106	−6.15
74	Harney County OR	261	119	−7.56
75	Rio Grande County CO	261	106	−7.41
76	Wilson County TX	261	89	−6.14
77	Lander County NV	259	136	−6.56
78	Asotin County WA	258	134	−7.87
79	Karnes County TX	258	86	−6.01
80	Meagher County MT	257	155	−8.06
81	Upton County TX	257	101	−6.10
82	Stillwater County MT	257	148	−7.38
83	Graham County AZ	256	111	−6.72
84	Lake of the Woods County MN	256	104	−6.57
85	Mineral County NV	255	108	−6.47
86	Lincoln County NM	255	116	−6.28
87	Cloud County KS	254	113	−7.81
88	Maverick County TX	254	91	−5.65
89	Sweetwater County WY	254	130	−7.57
90	Dolores County CO	254	133	−8.48
91	Canyon County ID	254	105	−6.96
92	Rio Arriba County NM	254	124	−9.32
93	Malheur County OR	253	114	−7.31
94	Winkler County TX	252	92	−6.17
95	White Pine County NV	252	116	−8.26
96	Nolan County TX	251	104	−6.34
97	Cibola County NM	251	101	−7.00
98	San Patricio County TX	251	94	−6.08
99	Edwards County TX	250	104	−5.83
100	Ventura County CA	250	140	−8.03

Figures come from each place’s page and share its sources and rules; see the methodology.

More drought rankings

Counties with the most months in extreme drought