Henrys Lake water level history

Daily records since 1977 · Level today: 12.82 ft

Highest on record

17.20 ft

Jun 28, 2018

Lowest on record

9.72 ft

Oct 10, 2001

Today

12.82 ft

Oct 21, 2026

Years of data

since 1977

In short

Across 39 complete years, 2002 had the lowest average level (12.10 ft) and 1983 the highest (16.46 ft).

On average the lake is lowest in October (14.63 ft) and highest in June (16.32 ft).

Henrys Lake level, all years

Loading chart…

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

Lowest years

Years ranked by their lowest daily level.

199210.14 ft on Sep 1
200210.60 ft on Jan 2
199311.19 ft on Jan 1
201511.32 ft on Dec 26
198811.61 ft on Sep 13

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (285 days)	15.12	12.58	Sep 13	16.48	Jun 13
2025	15.45	14.39	Oct 1	16.63	Jun 5
2024	15.62	14.63	Oct 30	16.88	Jun 18
2023	15.68	14.72	Oct 23	17.18	Jun 13
2022	15.12	13.71	Sep 13	17.11	Jun 19
2021	15.67	14.35	Oct 24	16.87	Jun 8
2020	15.89	14.74	Nov 5	16.96	Jun 18
2019	15.98	15.04	Nov 8	17.12	Jun 18
2018	15.64	14.66	Oct 17	17.20	Jun 28
2017	15.87	15.16	Jan 1	16.98	Jun 21
2016	15.19	14.27	Oct 27	16.80	Jun 15
2015	15.50	11.32	Dec 26	16.78	Jun 3
2014 (311 days)	15.56	13.77	Jan 1	16.69	Jun 28
2013	15.32	12.78	Sep 29	16.93	Apr 7
2012	16.16	15.38	Oct 18	16.87	Apr 6
2011	16.29	15.80	Sep 14	16.87	May 9
2010	16.04	15.48	Oct 3	16.79	Jun 8
2009	16.09	15.37	Oct 12	16.78	Jun 6
2008	15.63	14.36	Jan 1	16.77	Jul 1
2007	15.08	13.75	Sep 29	16.30	Jun 6
2006	16.06	15.65	Sep 8	16.87	Jun 15
2005 (299 days)	14.85	12.58	Jan 2	16.68	Jul 13
2004 (264 days)	12.92	11.47	Sep 11	14.94	Jun 10
2003	13.57	12.26	Oct 7	15.39	Jun 26
2002	12.10	10.60	Jan 2	13.27	Jun 18
2001 (272 days)	12.85	9.72	Oct 10	16.66	Apr 27
2000 (306 days)	15.91	14.98	Sep 24	16.63	May 28
1999	16.20	15.74	Oct 17	16.64	Jun 23
1998	16.39	15.89	Oct 7	16.78	Jun 27
1997	16.05	14.30	Apr 17	16.71	Oct 24
1996	16.02	15.58	Oct 15	16.61	Jul 6
1995	15.67	13.99	Jan 1	16.67	Jul 15
1994	15.03	13.04	Sep 29	16.65	Apr 26
1993	14.56	11.19	Jan 1	16.73	Jul 28
1992	13.41	10.14	Sep 1	16.51	May 20
1991	15.28	14.28	Oct 18	16.74	May 11
1990	15.57	14.41	Oct 6	16.56	Apr 15
1989 (290 days)	14.33	12.54	Jan 1	15.85	Dec 31
1988	13.85	11.61	Sep 13	16.49	Jun 15
1987	15.08	14.03	Oct 26	16.68	May 31
1986 (282 days)	15.71	13.42	Aug 20	16.81	Jun 8
1985	15.69	14.98	Aug 31	16.74	May 31
1984	16.09	15.48	Sep 25	16.89	Jun 24
1983	16.46	15.89	Apr 21	16.98	Jul 10
1982	16.02	14.82	Jan 8	16.91	Jun 29
1981	15.38	13.70	Sep 23	16.95	Jun 4
1980	15.95	15.22	Sep 7	16.78	May 26
1979 (267 days)	15.77	15.29	Oct 9	16.42	Jun 26
1978 (128 days)	16.27	13.42	Jan 27	16.80	Jul 1
1977 (3 days)	12.21	12.04	Oct 19	12.48	Dec 5

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

Monthly averages

Month	Average	Lowest	Highest
January	15.21	10.60	16.78
February	15.36	10.91	16.81
March	15.48	11.13	16.82
April	15.71	11.40	16.93
May	16.03	11.89	16.92
June	16.32	12.29	17.20
July	15.91	11.91	17.00
August	15.11	10.00	16.68
September	14.71	9.79	16.59
October	14.63	9.72	16.71
November	14.75	9.94	16.63
December	15.02	10.28	16.64

Download

Daily levels as CSV (16,617 rows; credit the original agencies listed below)