Heart Butte Reservoir water level history

Daily records since 1989 · Level today: 2,057.62 ft

Highest on record

2,082.52 ft

Apr 17, 2009

Lowest on record

2,000.17 ft

Jun 11, 1990

Today

2,057.62 ft

Oct 21, 2026

Years of data

since 1989

In short

Across 34 complete years, 1992 had the lowest average level (2,052.78 ft) and 1997 the highest (2,064.48 ft).

On average the lake is lowest in January (2,059.67 ft) and highest in April (2,063.31 ft).

Heart Butte Reservoir level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years) Full pool

Lowest years

Years ranked by their lowest daily level.

19922,000.17 ft on Jan 2
19912,000.17 ft on Jan 25
19902,000.17 ft on Jun 11
19962,035.25 ft on Jan 24
19992,035.74 ft on Jan 4

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (294 days)	2,061.53	2,057.51	Sep 25	2,064.67	Feb 18
2025	2,062.21	2,060.55	Jan 1	2,065.54	May 26
2024	2,062.64	2,060.22	Oct 26	2,064.97	Apr 5
2023	2,063.16	2,061.12	Jan 1	2,075.91	Apr 15
2022	2,061.02	2,057.09	Jan 17	2,066.51	Jul 12
2021	2,059.45	2,056.29	Oct 12	2,063.24	Jun 12
2020	2,061.87	2,059.08	Oct 19	2,066.12	Mar 8
2019	2,063.77	2,061.85	Sep 7	2,078.60	Mar 26
2018	2,062.05	2,059.83	Jan 9	2,067.47	Mar 31
2017	2,061.61	2,059.20	Sep 14	2,066.06	Mar 25
2016	2,061.91	2,060.16	Sep 22	2,064.18	May 12
2015	2,063.41	2,061.74	Dec 31	2,066.54	Feb 13
2014	2,063.65	2,061.88	Dec 8	2,070.71	Apr 10
2013	2,063.84	2,062.06	Jan 1	2,070.00	Jun 3
2012	2,062.96	2,061.28	Oct 12	2,064.85	May 11
2011	2,064.20	2,061.40	Nov 17	2,073.02	Apr 10
2010	2,063.44	2,061.96	Mar 21	2,068.82	Apr 3
2009	2,062.96	2,056.90	Jan 4	2,082.52	Apr 17
2008	2,058.52	2,055.73	Oct 11	2,060.52	May 16
2007 (278 days)	2,060.81	2,058.77	Jan 20	2,062.79	Jun 18
2006 (267 days)	2,062.13	2,058.19	Sep 13	2,065.12	Apr 29
2005	2,062.71	2,061.33	Nov 3	2,066.42	Jul 4
2004	2,062.78	2,061.02	Jan 14	2,068.82	Mar 13
2003	2,062.43	2,060.54	Jan 2	2,070.06	Mar 21
2002	2,060.76	2,059.63	Sep 27	2,063.83	Jun 19
2001	2,062.43	2,045.49	Jul 2	2,068.03	Mar 19
2000	2,062.07	2,060.46	Dec 31	2,063.79	May 22
1999	2,063.19	2,035.74	Jan 4	2,068.75	Mar 4
1998	2,063.60	2,040.22	Dec 31	2,067.21	Aug 23
1997	2,064.48	2,062.25	Mar 10	2,081.98	Mar 24
1996	2,061.32	2,035.25	Jan 24	2,066.97	Mar 16
1995	2,062.38	2,035.86	Dec 17	2,067.39	May 15
1994	2,061.71	2,044.31	Feb 25	2,066.27	Jun 14
1993	2,059.21	2,049.75	Jan 10	2,065.14	Jul 28
1992	2,052.78	2,000.17	Jan 2	2,055.46	Jan 6
1991	2,053.04	2,000.17	Jan 25	2,055.46	Jan 29
1990	2,053.81	2,000.17	Jun 11	2,055.91	Apr 10
1989 (1 days)	2,055.10	2,055.10	Dec 31	2,055.10	Dec 31

Levels in feet. Partial years show the number of days with data.

Monthly averages

Month	Average	Lowest	Highest
January	2,059.67	2,000.17	2,064.76
February	2,060.18	2,000.17	2,066.54
March	2,062.33	2,000.17	2,081.98
April	2,063.31	2,000.17	2,082.52
May	2,063.04	2,000.17	2,069.10
June	2,062.93	2,000.17	2,070.00
July	2,062.51	2,000.17	2,066.67
August	2,061.61	2,000.17	2,068.16
September	2,060.88	2,000.17	2,066.95
October	2,060.71	2,000.17	2,066.81
November	2,060.72	2,000.17	2,064.36
December	2,060.27	2,000.17	2,064.52

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Daily levels as CSV (13,081 rows; credit the original agencies listed below)