Hillsdale Lake water level history

Daily records since 1989 · Level today: 917.06 ft

Highest on record

929.39 ft

Jun 7, 2019

Lowest on record

912.58 ft

Aug 28, 2003

Today

917.06 ft

Oct 21, 2026

Years of data

since 1989

In short

Across 36 complete years, 2003 had the lowest average level (913.69 ft) and 2019 the highest (920.40 ft).

On average the lake is lowest in February (915.75 ft) and highest in June (918.70 ft).

Loading chart…

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

Years ranked by their lowest daily level.

Year	Average	Low	Low date	High	High date
2026 (292 days)	917.23	915.51	Feb 13	920.34	Jun 3
2025	916.44	915.07	Jan 4	920.31	Jun 9
2024	916.66	914.79	Oct 29	919.44	Jul 8
2023	916.86	914.95	Oct 18	918.43	Dec 29
2022	917.20	915.52	Feb 15	922.46	Jun 3
2021	917.99	915.71	Mar 12	922.81	May 29
2020	917.37	915.23	Mar 8	920.05	May 31
2019	920.40	915.73	Feb 11	929.39	Jun 7
2018	916.64	914.75	Oct 3	922.74	Oct 15
2017	917.66	914.92	Mar 24	924.96	Aug 24
2016	917.17	915.39	Feb 5	920.30	Sep 11
2015	917.70	915.51	Jan 22	923.93	Jun 1
2014	916.20	914.74	Apr 23	918.41	Jun 16
2013	915.53	913.19	Jan 25	920.13	Jun 2
2012	915.34	913.29	Dec 31	918.00	Mar 26
2011	916.35	914.77	Nov 1	919.20	May 26
2010	917.54	915.12	Mar 5	923.59	Jun 18
2009	917.51	915.25	Mar 4	920.86	May 5
2008	918.17	915.86	Mar 16	924.48	Jun 10
2007	918.12	915.99	Jan 1	924.44	Jul 5
2006	915.38	914.42	Apr 23	918.03	Jan 1
2005	917.66	914.99	Mar 20	922.95	Jun 15
2004	917.66	914.10	Jan 15	920.82	Jul 27
2003	913.69	912.58	Aug 28	914.76	Sep 15
2002	915.57	913.32	Dec 31	921.28	May 30
2001	916.63	915.36	Dec 31	919.23	Jun 24
2000	916.17	914.89	Feb 15	918.48	Jun 28
1999	916.88	914.95	Mar 16	922.04	May 9
1998	917.81	915.08	Jan 28	923.97	Nov 10
1997	916.74	915.02	Jan 19	920.47	Jun 1
1996	916.74	914.48	Apr 27	920.73	Jun 11
1995	917.24	915.03	Apr 10	928.32	May 31
1994	917.09	914.71	Jan 21	923.58	May 16
1993	919.34	914.99	Dec 31	926.64	Jul 26
1992	916.54	914.30	Feb 10	924.23	Dec 21
1991	915.78	914.16	Dec 4	918.46	May 31
1990	917.17	914.65	Jan 1	925.48	May 28
1989 (1 days)	914.65	914.65	Dec 31	914.65	Dec 31

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

Month	Average	Lowest	Highest
January	916.09	913.08	920.38
February	915.75	913.04	919.46
March	916.03	913.08	919.86
April	916.74	912.88	922.24
May	918.53	913.82	929.27
June	918.70	913.87	929.39
July	917.71	913.44	928.54
August	917.06	912.58	926.57
September	916.72	914.16	925.13
October	916.77	913.67	925.14
November	916.71	913.49	923.97
December	916.79	913.29	924.23

Daily levels as CSV (13,412 rows; credit the original agencies listed below)