Drought in Treasure County, MT: 5 years in 10 since 2000

5 years in 10

Treasure County, MT: 13 of 26 full years had 13+ weeks in drought. More drought-prone than most US counties.

20002025

Drought years: 2000 (23 wk), 2001 (45 wk), 2002 (53 wk), 2003 (52 wk), 2004 (52 wk), 2005 (31 wk), 2006 (18 wk), 2007 (13 wk), 2012 (27 wk), 2013 (22 wk), 2017 (28 wk), 2021 (37 wk) and 2022 (23 wk). Not a single drought week in 2009, 2010, 2011, 2014, 2015, 2016, 2018, 2019 and 2023.

Plan for drought as normal: shrink the lawn, go drip and natives

Drought is the normal state of things here. Most of the yard goes to natives and gravel on drip; any grass that stays is a small, tough patch.

If you are replacing turf, plant natives in fall so roots set before the Sep peak, and check your water utility for a turf-removal rebate before you dig.

Against the rest of MT

41st most drought-prone of 56 MT counties; the MT middle is 5.4 in 10. Closest on the list: Yellowstone County (5 in 10) and Dawson County (5 in 10). Driest in MT: Glacier County (6.9 in 10). Least drought: Garfield County (3.8 in 10).

When in the year it hits

Most often in Sep (40% of weeks), then Nov (39%) and Aug (39%). Least in Jun (26%). May to September averages 34%.

33 Jan
34 Feb
32 Mar
33 Apr
32 May
26 Jun
33 Jul
39 Aug
40 Sep
38 Oct
39 Nov
38 Dec

The worst year: 2004

2004: 52 weeks in drought, peaking at D4 exceptional. Across 1,401 weekly maps: 34.8% of all weeks at D1 or worse, 22.4% at D2, 9.9% at D3, 41 weeks with some of the county in D4. Longest unbroken spell: 207 weeks, Aug 21, 2001 to Aug 2, 2005.

Lately

Last drought year: 2022, 23 weeks. 2016-2025: 3 in 10, against 6.3 in 10 for 2000-2015, wetter lately. So far in 2026: 31 of 44 weeks in drought, through Nov 3, 2026.